BE552639A - - Google Patents

Description

       

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   The present invention relates to installations and apparatuses ensuring the transmission of massages, of the type in which unencrypted messages are emitted, transmitted and recorded, and more particularly proposes to bring to such installations improvements tending to to reduce the weight, to allow a more compact construction, these installations being moreover adapted to be used in an airplane.



   Until now, transmission devices or installations of this type have in general been inapplicable to airplanes because of their weight, their size and also because their construction was such as their constituent parts, such as the keyboard. and the printing mechanism, which must necessarily be within reach of the operator, were themselves bulky and cumbersome and linked inseparably with other parts of the installation, of which it was not. necessary that they are always within reach of the operator? it resulted

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 in the cabin of the Opéa-Ai a useless ônjyora'b.i * j6ïï & even, in certain types of aircraft,

   these e onditiorfl do not psi * - did not put in place such a jbw'saila'vi & n -j.a because of the lack of space in the cabin. e PUU2 'es ai3ûn.s the use of installai, iono of this typo' '.ai' c? tu'iO If-, j? ge measure reserved for large dinsnsiQKS gear 31; at 1.1 ï - swoon on the ground.



  The advantages ce a ¯'.i /? Tsri.; Tic> ïis' 2n ';' p seiifii.jiïoi *. he sat, from fs.u ':;. p'. '' (- SK '= me. r .-. iG: Gle fias; "c-î # -: tûo. - read from radio transmission s-' ins-1. ru 'Si soL' * .. rci's c.?'* '. I.! J :: "0 terition of the eratetir and a cF <-. gi.:..;-3K. pi'éclâ de -bou 3, & messages sent and received, have been ".. e. -I would * iu <3 l .-, :: ;; r.?: '.-' .: '.: = - 3: e's Besides las iïificyi'ô-' c'i -.- L '-. R -.- CMs .LR-L 1: .. i tallutiona encienr.ee 12 Jsjō-:

   - ':. q.; - il ": - ;. ûi ± \' ivb & î ..? jô tions de for'.ctionnec! cnt Who the? x-endest jï. & éa-viise-n to 1.m - .. 'wise on airplanes, in particular on lc -. & avior-s ±: ilitaii; e3 and on aircraft intended for the sailor--. e luifacue,' - 63 aH.i con- <identifies the exploitation dc i: '' tallat.cr:sl 33 ± yèyî- ivm3s-r & de ooamîuniquor in certain3 circumstances a'l7:.: 0 us cal a-.on and, in other wax with - ' -cs the planes a'u particular group, it is necj ..- I.- '.'., -.-- c- d l- \ r;: Llî3ï.-î; îo? i lu more efficient of an iTt-ni-. çvSunc ir-3ta? .lai; iGii oeytj.-i- ce be able to do ') .1: .-. dl-: ii: ':' .'..-. ,.: 3 1 that August d8stinéd and always <-u 'L:!.' ¯ -.- L .ca ± S-- :, & t S'ens. To be shulecent 1 & 3 p.c; .i: -. ' Given r1t; S. #? Or2iò. <? tnr.5 * -t1 :::. pr3'3aR the pi .- ".- main goals and a-" antuge ± <"& la>: # '#' - '# Lwoatiûa;

   î. ' coli regarding the installation of dais non eiMëa..bT.e; s-fj- '; Iss euiTaats -l'installation aasui-f '.u i3 in' 3lsl -3 "s is adapted in purtioH'r uuo iiti1i." "; -, i,: Lc -.- i -3-U & '!.. L or other end of diauMsicKG] ;. 3tr '-.;: -'-- ïî <: c:! '.:' -. l avae radio equipment ë -. tcn.v 3t # towptcra.v 5j- --- would iJC necessities of the -le ea-ïageâ

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 -the transmission installation comprises a keyboard, an information storage device, and a device giving a free-to-air recording, it is suitable for use in combination with transmitting and receiving radio equipment and is capable of act selectively to record, using a keyboard, a message intended to be retransmitted later,

   send a message either under the action of the keyboard. or under the action of the storage device, or receive a message 9 it is capable of giving a clear recording of all the messages sent, received or stored; it comprises a keyboard, an apparatus giving a clear recording, and a device for storing information, and is adapted to be used in combination with a transmitting and receiving electric radio equipment, in.

   view of the selective reception, transmission or storage intended for a subsequent retransmission of a message, and for the production of a unencrypted recording of all these messages, the keyboard and the device ensuring the recording constituting autonomous sets, collected and of low weight distinct from a third assembly and electrically connected to the latter, which comprises the storage device and the circuits controlling the distribution of such messages;

   - it is able to act to control all the signals received on a chosen radio frequency band, and only when there is reception of a predetermined sequence of identification signals, so as to ensure printing. editing of the message received following receipt of these identification signals; -the transmission facility is capable of acting to monitor all signals received on a desired radio frequency band and may act selectively to ensure a printed record of all messages received on that band, or to perform print reproduction -

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 me of those only Lle iJç, 3 il :: Si3ages r-îgas on the d¯rrf-EU which are preceded 3rd 3.; i:. ::> ;: lPid; rtiij. ';;; 1-', , :: ..:,: t;

   -it is ± 3eÎ.3-: rLf ^. for: rï '., ¯ ±.'. of ini, ", =. ;;:;: t (...;, '1:.: eue--. these grouped Q'> 't' '' 'C1; ,,;," .. <.t'1 ,, '', e [t: J. ip <cm, 03 do -: r, ¯: a ... staggered in the tespa 'fear, t'uist .t;:; (; 1. <.:.: 'eks-jua c- oes signal groups us.!. l' ,,:;, e -t: 1it: l1e) .. n:! è.iil ';'; J2t ':? : ': 16,: -: ¯.¯¯.' '. Y'. '"Tér1" 1vlques des üS: Ei.3 .Jf ::: t (':. 1; ionG ... èit:. ' '.:, 6;; z "s'.:'.



  ..j group analyzed from r:, r?; t.¯ '.. n. <.., -4.jke'l ..,: '..-.-. "3 ..- I1-1'-' .- ..:.; 9 ..... ¯ tiné à Comül ' 1rJer 1..lt.Ï '. ^ S .l. 5e t, "' S..ß. '.': ....,:> jo3. - .; j - :. v the 12s 4.1f ;. Nest. includes a # ':' f. \ pO. :: Lt: ... ±, '- ;; ":: J.!:;:' ;;. {> u" picked up t1 ': .T'.i 'Ht: Jtj.:.' .. C'S-; y :: -: r,.; t¯:.). The "" 5..f: :( .; ',.' '.:. rc -; - .ā! r'.2; ---.' do cancer pur iivt 3r : - - ': 3 a:': - 1 -!) LY ':':;! - :; eîo: i - :. i.:r:-.r-v;5 magnetic Aans un ïtā''i 'r :. 1.i {':; 3: 2t' :: J "! 'J 3- & C)?, - ;: i..S d- .ri-lj- select! 3ctively for 1'1'lJ' ' Zt {. ;; t, r'3 or% xlc.-9? - 'a group of signals ôgtt'.f.' '2: c..ilw t! .--' 7: e3ale-sieR * ot. savors ...-. a.:; '":, c' '. # by this medium; yr3rYedz't: -. r: mrgr, -St :: I2.: 1.G' -1 installation i:. 3 i; t:.: ''. rc .. '; s È; i ..: secs:. '' .N "i ::.>: ɯ frj keyboard can be created. 3" ':.:' -: 'l.:1/. ";) Tlrd.t3) J a11J?;? Gi: t. .: '::;

   -:.: 3: .15.j R3 .... 'l- that, in one 1: .J. i f 'r¯. = <i;:; - ,. her . ,NOT;' , on:.;} r; ', tp;' - Jt :: 2 ;;: t] .: n .: lt: 3.- posed t: ran: \ ve: C93.1 $ lDe! 1;. .t - 'L: Ti3 $ :.'> sïx:,: aâ¯i .:: ¯ Info-3. .. î1'2: ī (; :::; grouped, l't3rl; 'e: jist ":' {! l"! .. ":.; '.-'- wa ±, 3a,:; 3j ot C '!,!.:' 6¯.-. -> ble to act Bt31 -.:I} tj, "',,' ;. c., -" "; '1.". . ';. C .¯ ":: ..,.: J¯t.: E5ri:" 1.j} ¯ {.r ...', l3) .2: ..; ..:.; 1 action of a tell-. ' h-: r '# - # .-. IJ: c. -: - = ##, ....'.-'; j2 ..:;., ## sux-.c #.: # * # dfi groups: j:!. (r.lbiÀ: ':'>. <i.;:, ":; :: 03 / ;, c,:;,;:,; '###' # .t: I,:; j <>; :( :. V :: 3,:>: Ü, (,,, .., j.:.s of group ': w.'? 2 '0': ': a :: -., ß .. :::, ..,:. ":; ï: ¯ ¯,. 's -12 inatal1dtio ::: 3,; 5iy..sa un - #: cW, htïa.ï: ar iap: i : - [1StL da leaf of the type a wheel <c ^ (:.,:. # 84. '. asr'è: -, cs' .. =' 9 di - ?? '3ii' command pO \ .1r QS c. #> f! ïx.3: 6: t6Sftr <t tn XéPO.n :: H7 a: i applie1.i ;; j, rH.1.



  BL1QL38fl8.'SrB and alternating do nJ. [;! 1d.D .:;,; LÜi,.: J .. "t ;;" born, 3 sons 1'5¯ '' '' 1.1 :: : of each of the j: Lt'J "é'7t;:) - tef '11aJ'r (;;: i d-> tracks' 63U.s'i -.- a series of groups: .la Í31rà \; iL O;.: lS: "1 ë." l: o. u - 3t-Ci: -. ± J:, ': nJ' put SL1.0a tlBsively in position 11! - J, '; 3 - iitt : '. i' '.r ±,:?' w '' "a.:¯:.".3 ,. '. depending on the signi f ioatioa or <, i: l "" .. t; 1'1 d. <: 1 3: i. ';, ri,; -;,; T- cd' -3: - ;, to add a message

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An electro-mechanical printing unit constitutes one of the parts of the present invention and it operatively cooperates with a segment forming a matrix of the control circuit to receive, transform and record in clear soda signals received by the transmitter-receiver group. or issued from the keypad.

   The particular type of unencrypted recording apparatus used is known in the art of tele-printing and constitutes an apparatus for printing a sheet, with a character wheel,
Old devices for the reception of conventional coded signals of the type mentioned normally include: a character wheel;

   a relatively complex mechanism for moving the character wheel to a desired character printing or spacing position an inking device for the character wheel, which may be a movable ribbon; and a support for the page on the-. that the message should be printed The main parts of such an old mechanism, for example, the character wheel, the inking device, and the positioning mechanism have been arranged to undergo movement opposite the page on which the message is to be printed, with the unfortunate consequence that the text cannot be completely read as it prints.

   In addition, the known tele-printing devices are of relatively complicated construction and include a large number of mechanical parts which make frequent adjustments and maintenance operations necessary and the weight of which makes the installation very heavy. . In addition, it is necessary to pay constant attention to the inking device for insureds? a clean writing of the elements of the message and a variable consistency of the ink according to the temperature variations which frequently occur in an airplane.



   The printing apparatus according to the invention produces with its control matrix a new telegraphic receiver.

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 phique of the sheet printing type in which the only portion of the active mechanism located in front of the page on
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 which the message is to be printed is a hammer r3 ... die although the mechanism can be used with a ribbon, if desired, the tape can for example be carried by the hammer mechanism. .ré uses a paper coated with a special black surface, commercially available, the black surface being treated with a light colored material.

   When the hammer strikes the material on the surface and presses the paper against the desired character of the character wheel immediately behind the paper, in correspondence with the hammer, the specially treated material is broken upon contact with the letter. embossed letter of the character wheel leaving a visible practically black mark
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 representing the character in relief.

   This rienr way: is- sorting the characters is not sensitive to1 temperature variations e
The new printing apparatus itself comprises a character wheel which undergoes in front of the page
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 displacements corresponding to the spacing of the lettxea under the action of a cable wound on a spacer drum The cable fixed by means of a support collar on the character wheel can be moved selectively by rotation.
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 elementary siti.ves of the cable drum which makes successive movements possible.! of the carrot wheel.

   The positive rotation of the spacer drum causes winding and storage in a spring of the type used in clockwork movements inside the drum, this spring being used for the return movement of the spacer.
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 spawning wheel. A printing hammer .oit is mounted in front of the page, so as to be able to be moved in synchronism with the displacement of the caraotàroa wheel * Thanks to a system of pulleys the spacer cable is used to move laterally the printing hammer, also

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 although the character wheel, in synchronism with the latter.

   When a desired character is to be printed the hammer which is normally in a position where it is. at a certain distance in front of the page is projected towards the character wheel to clamp the page and write the desired character on it.



   All the mechanisms acting for the actuation and control of the printing hammer and the character wheel * are mounted on the sides, at the rear or at the lower part of the printed page, so as not to interfere with the page view when the message prints. The printing hammer, good. that it is placed immediately in front of the page has a normal position. which, because of the construction of the printing mechanism, the method of mounting the hammer and the rapidity of the movement of the. hammer is never in a position where it would obstruct the reading of a part of the line being printed which is consequently at all times entirely visible,

   
The selection of the character of the character wheel is obtained by means of a new very low weight stopping mechanism, subjected to a control action and combined with the shaft on which the character wheel is carriage 11 comprises a wheel toothed ratchet rotatably integral with the shaft supporting the character-carrier strip having a certain number of stop positions determined by the engagement of a solenoid-controlled pawl with the individual teeth of the wheel The stop mechanism uses two clicks of this kind controlled by adenoid arranged at the periphery of the ratchet wheel,

  such that one pawl engages the ratchet wheel and stops it in a position between two positions in which the other pawl engages the wheel and stops it.



  Thus the amplitude of the desired angular displacement of the character wheel can be controlled by excitation of one

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 of the two solenoids, for desired angular positions of the character wheel shaft. The excitation of the solenoids at precise angular positions of the shaft is effected by means of printed collector circuits arranged in the vicinity of each end of the character wheel shaft, each collector circuit com- requesting a solenoid and, by means of the combined pawl, half of the characters of the character wheel.



  Thanks to a receiving matrix of the control circuit, one or the other of the collectors can act on the corresponding solenoid for each coded combination introduced into the circuit. The use of an electrical selector mechanism, in preference to a mechanical permutation coding element selection mechanism, goes a long way in keeping the printing mechanism low in weight.



   An important feature of the invention resides in the use of a mating gear, on the character wheel shaft coordinated with the ratchet gear and used to positively swing the locking pawls. stop in a position on a tooth of the ratchet wheel, If the solenoid corresponding to this pawl is not then energized, the oliquet is ejected elastically out of this stop position before the stop tooth is engages with the pawl. This action is repeated for each tooth of the stop wheel and is repeated for each pawl.

   Thus, the pawls are positively brought into position by rotation of the character wheel shaft, and when a stop solenoid is energized it does not have to actuate the pawl but simply to hold it in its position. stop position, eliminating the mechanical delay due to inertia, which would exist in a solenoid actuating the pawl.



   The roll of material intended to support the printing is located at the rear of the printing apparatus and unwinds downwards at the rear, passes from bottom to top in front.

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 of the character wheel shaft and the wheel itself and rises to a drive roller. 0 Thanks to a new motor mechanism which includes a positive-action clutch driving an operations shaft which in turn, through a friction clutch, drives the character-carrying wheel shaft,

   the apparatus can cause a wheel return or a line change for any position of the character wheel and the wheel return operation can also be controlled so as to simultaneously cause a line change than to effect only a return from the character wheel.



   In view of the foregoing observations, the main objects of the invention with regard to the printing apparatus are to provide a low weight printing apparatus using a selector circuit which comprises a collector actuated by the printer. printing mechanism; -a printing device in which the character carrier and the hammer have such a relative position with respect to the recording medium that no inking device is necessary and in which the recorded messages can be read as soon as the recording of each character is performed;

   -a novel arrangement for the sheet printing mechanism for synchronizing a character wheel and a printing hammer mounted to effect a transverse movement with respect to the page on which a message is printed on a page disposed between the character cart and hammer; a printing apparatus comprising a device for positive selection of characters obtained by means of a selector shaft collector which energizes a selector shaft stop device controlled by a solenoid; -new collector printed circuits arranged at one end and at the other of a wheel selector shaft

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 character carriers for use in positive selection of the position of the rotating character wheel;

     a sheet printing apparatus comprising a printing hammer capable of being moved over distances corresponding to the spacing of the letters, with a new device for locking the printing hammer in response to the operation signals received; -a new drive train of a teleprinter with a positive clutch controlled at high speed capable of predetermined elementary rotations.



   Another constituent part of the installation, according to the invention, the keyboard, is on the whole similar to a normal teleprinter keyboard, but includes certain modifications with respect to the latter, as will be described. can be used selectively for the transmission of messages and for controlling the storage of signals forming part of messages to be retransmitted subsequently, a printed recording of this message being provided in any case.

   Although, if there is a link, the keyboard could be arranged to receive a large number of characters or symbols, the preferred and described embodiment is suitable for the transmission of signals representative of the 26 letters - very many. the alphabet, carriage return, or character wheel, line feed, letters and spacing,
Signaling devices are provided as part of the keypad to allow the operator to see optically certain limiting conditions present in the installation, for example, the proximity of the end of the magnetic tape in the recorder. tape and near the end of a line on the page being printed.



   These signaling devices are lamps and when they are on they make known the two circumstances indicated above. Although the printing apparatus of the installation automatically causes the return of the carriage and the change of line, the operator using means

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 own transmitters can emit a carriage return and line change signal at the end of each line, hence the need for an indicating device to inform the operator of the approach of a line. this position. In a conventional manner, this transmitter uses coding bars with notches, actuated by the keys of the transmitter.

   Following the lowered character key, the five code bars are moved to a predetermined relative position, each bar moving to the right or to the left. Each coding bar is conjugated with a pair of contacts and when it is moved to the right, the bar causes the corresponding contact set to close, and conversely, when it is moved to the left, it causes the contact opening. Closed contacts correspond to marking pulses and open contacts correspond to spacing pulses.

   each key activates the coding bars to achieve a particular combination of five signals corresponding to the position of the switches of the five coding bars. The keypad adapts the contacts for a combination of a simultaneous group of five signals, this the combination being fed through five separate conductor circuits to the main control circuit.



   Immediately behind or parallel to the five coding bars is provided a universal bar - the one which always moves in one direction each time a key or the space bar is lowered and allows a wedge or blocking blade. bar from being brought into a locking position where it cooperates with the five coding bars and the universal bar.

   The movement of the blocking blade into the blocked position prevents a return to position of the coding bars and forms a sixth set of contacts. This action takes place each time a key is lowered, subject to what will be explained in the following regarding the anti-repeat device

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 Due to the mechanical delay introduced, the contacts of the coding bars reach their position before the contact circuit of the universal bar is supplied by the actuation of the sixth set of contacts by means of the blocking blade. Complete integration of the combination of the five coding signals into the control circuit before the electronic matrix of the control circuit is actuated to transmit the coded signal.

   The contacts actuated by the locking blade of the universal bar cause the operation of the control circuit to transmit the coded signal in the manner desired by the Operator / Such an action of the control circuit following the transmission in code Actuates a blocking blade, code bar solenoid to clear the blocking blade and allow the next key to be lowered which again moves the code bars and the universal bar to restart the transmission operation .



   A new anti-repeat device incorporated in the universal bar, cooperates with the locking blade to prevent re-locking of the latter in the event that any of the keys are held in a lowered position maintaining the universal bar in its offset position. .If the blocking blade cannot be moved into its blocked position, its contacts will not be able to close and the control circuit will not be able to act on the combination of the signal pulses corresponding to the contacts of the coding bars. releasing the lowered key will allow the universal bar to return to its normal position, the anti-repeat device becoming inoperative.



   When the spacer bar is actuated, the anti-repeat device is inoperative, said bar having its own transmitter control contacts, arranged in a circuit parallel to those of the actuated contacts. by the locking blade. If the space bar is lowered and held in this position, the transmitter

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 will repeat the combination of signals corresponding to a spacing until the space bar stops being lowered,
The invention therefore proposes to achieve.

   a keypad controlled transmitter, having coding bars which can be arranged in any relative arrangement and a universal bar, an arrangement corresponding to the lowering of a key, individual contact groups being actuated by the coding bars. coding, the movement of the universal bar taking place with a predetermined delay between the actuation of the contacts of the coding bars and the control of the contacts of the universal bar.



   Another object of the invention consists in providing in the transmitter with coding bars, controlled by keyboard, a wedge or locking blade intended to come into an active locking position in which it cooperates with all the coding bars to at the end of the movement of the universal bar, the actuation of the locking blade controlling a group of contacts to enable the emission to be triggered.



   The invention also proposes to provide in the transmitter in which the blocking blade which controls the triggering of the transmission can only move into the active position when the universal bar is in the offset position. , a new anti-repetition device, cooperating with the locking blade and with the universal bar, to prevent repeated transmissions if the universal bar is prevented from returning to its starting position.



   The teleprinter for aircraft according to the invention also comprises a novel recording device intended to store messages to be transmitted, this transmission being able to take place at a later time. The recording apparatus according to the invention is intended to be placed at a point remote from the aircraft, in order to provide free space.

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 around the operator, and remains unattended at all times.

   Owing to the special service conditions for which it is intended, this recorder comprises, according to the invention, a reduced number of parts, of a reduced weight and of a robust construction, in order to be able to withstand, in operation, significant acceleration forces. The main object of the invention is to provide a recorder selectively connected to the keyboard and to the printing apparatus and to the transmitter of the teleprinter, so that the message to be transmitted can be, at will, recorded on the recorder and then played back at any time by the recorder, making the speed of message transmission completely independent of the skill of the operator.

   Each message can thus be transmitted in the shortest possible time, while allowing the operator to perform the initial recording of the message at the desired speed.



   The recorder according to the invention can be used for remote operations and does not require any personal monitoring other than periodic maintenance visits.
It is also provided, according to the invention ;. for the said recording apparatus, a simplified control of the recording tape, requiring no auxiliary device for driving the take-up reels, which allows the weight and complexity of the recording apparatus to be reduced to a minimum.



   The recorder according to the invention uses, as the recording medium, a steel tape, which allows efficient operation and eliminates any danger of breaking the recording tape.



   In addition, the recording system used in the device according to the invention allows a high density of information storage, thus ensuring maximum storage capacity in a minimum volume.



   In the method according to the recording invention

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 on magnetic tape the information is stored in series in a direction transverse to the tape and the tape is subjected to an intermittent longitudinal movement, between successive recording operations.



   In addition, the recording system is such that it makes it possible to store the information received on tracks arranged side by side, the recording and reading operation being carried out by means of a single recording head.



   A tape feeler device is provided, requiring a minimum number of auxiliary elements, to signal to the operator, from a distance, that one or the other end of the tape is approaching the recording head.



   Combined locking elements, both electrical and mechanical, subjected to the direct action of the recording tape, prevent the latter from being completely unwound either from the supply reel or from the take up reel.



   A special mechanism is also provided to coordinate the action of the recording head and the tape feed.



   A tape control mechanism controls tape operation during rewinding, copying and recording operations.



   Other characteristics of the invention will emerge from the description which follows.



     In the appended drawing, given solely by way of example: FIG. 1 is a diagram indicating, in general, the relationships between the various units constituting the telecommunications installation according to the invention; FIG. 2 is a diagram of all of the various circuits of the telecommunications installation according to the invention; Fig.3 is a circuit diagram of the keyboard; Fig. 4 is a circuit diagram of the recording apparatus; FIG. 5 is a circuit diagram of the circuits directly related to the printing device;

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 the 'ig.6 is a circuit diagram of the transmitter and distributor;

   
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 Figs. 7A, 7B, 70 and 7J3 .. arranged in the manner shown in Fig. 7 "represent a diagram of the mounting of the cookware of the operating relays of the system;
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 Fig. 8 is a circuit diagram of the second amplifier and recorder circuits; Fig. 9 is a circuit diagram of the calling system
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 I.g.10 is a circuit diagram of the receiver; ig.il is a circuit diagram of the control box;
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 '.g.12 is a circuit diagram of the power supply source;

   
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 Fig. 13 is a circuit diagram of circuit a. call systems, selectively interchangeable;
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 Fig * 14 is a front elevational view, partly broken away, of the keyboard, showing the arrangement of the keys of the coding bars, the blocking wedge and the corresponding contact groups;
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 Fig. 15 is a right side view of the. keyboard representing the block of contacts of the coding bars and the spacer rod; the Pige, 16,17,18 are detail views of the back of the keyboard, showing the relationship between the universal bar
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 and the locking blade in position 3no:

   .re, the initial offset position and the antīrépétifc3un Fig.19 is a detail view in per xpeat3ve, of daesoua, showing the cooperation between the block blade ± 1! ' and the coding bars
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 the 3. $. tJ is. a plan view of the printing apparatus in which the cover, the support of the roller supporting the sheet, the guide device, the st.éno3: stops

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 and the clicks have been removed; Fig. 21 is a front elevational view of the printing apparatus shown in Fig. 20, showing the printing hammer, the sliding type wheel, part of the cables and pulleys system, as well as the mechanism stop commanded by solenoid;

   Fig. 22 is a sectional view taken on line 22-22 of Fig. 21, showing part of the mechanisms for advancing the line change carriage, returning the carriage and controlling the printing hammer; Fig. 23 is a sectional view taken along line 23-23 of Fig. 21, showing the solenoid operated pawls intended to engage with the shaft of the character wheel, the ratchet wheel and the pawl control wheel; Fig. 24 is an exploded perspective view of the character wheel shaft and the various elements mounted on said rear; Fig. 25 is a side view of the sliding contacts of a manifold plate;

   Fig. 26 is a rear side view of a manifold plate, showing the circuits connecting the segments; Fig. 27 is a perspective view from the rear left side, showing the collected arrangement of the operation control links; Fig. 28 is an exploded perspective view of the function control mechanism and power source from the rear of the printing apparatus; Fig. 29 is a sectional view, more large scale, taken along line 29-29 of Fig. 20, showing the positive-acting clutch, for controlling operations and its control device, the clutch being in the disengaged position;

   Fig. 30 is a sectional view similar to that of Fig. 29, showing the elements of the clutch device,

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 immediately after the control armature has been actuated to allow application of the clutch; Fig. 31 shows the arrangement of the pawl actuation holes made in the clutch return plate (kickout plate); Fig.32 is a sectional view taken along line 32-32 of Fig.29 showing the arrangement of the clutch pawl pivot pin and the pawl cam pin relative to. driven plate and at. return plate; Fig. 33 is a perspective view showing the cooperation between the stopper pawl and the pawl wheel and the pawl guide wheel;

   Fig. 34 is a view, on a larger scale, showing the cooperation of the line change mechanism between the operations shaft and the character wheel shaft; Fig. 35 is a detail view, on a larger scale, showing the cooperation of the carriage return mechanism with the operating shaft and the shaft of the character wheel; Fig. 36 is a view in plan from above showing details not shown in Fig.20 of. printing device Fig. 37 is a schematic view of the positions of the characters of the character wheel and the relative positions of the holding cams;

     Fig. 38 is an operating diagram showing the different functions of the printing mechanism between the start and stop positions; Fig. 39 is a schematic view of the. recorder tape drive system; Fig. 40 is a view of an end portion of the tape recorder showing the control notches; Fig. 41 is a view of the other end of the tape recorder showing the control slots; Fig. 42 schematically shows the method by which the recording tape is folded; Fig. 43 is a sectional view of the raban, along the

  <Desc / Clms Page number 19>

 line 43-43, after folding;

   Fig. 44 is a top plan view of one embodiment of the recorder according to the invention; Fig. 45 is a front elevational view of said recorder of Fig. 44; Fig. 46 is an end view, right, in elevation, of the recorder shown in Figs. 44 and 45; Fig. 47 is an end view, left, in elevation, of the recorder of Fig. 44, through Fig. 46; Fig. 48 is a sectional elevational view taken along line 48-48 of Fig. 44;

   Fig. 49 is a plan view of the recorder manifold assembly Fig. 50 is a perspective view of the drive mechanism of the various mechanical elements which have been separated to show more clearly their relationships of operation; Fig. 51 is an elevational view, in section, taken on line 51-51 of Fig. 44; Fig. 52 is a view of the recording head drive mechanism.



   General.



   Referring to Fig. 1, the telecommunication installation according to the invention comprises five base units: a keyboard 50, the detailed mechanical construction of which is shown in Figs. 14 to 19 and of which all the electric circuits are shown in Fig. 3, a sheet printing apparatus 52, the mechanical details of which are shown in Figs. 20 to 38 and of which the electric circuits therein. Directly related are shown in Fig. 5, a magnetic recording or storage device 54 using a reversible magnetizing metal tape or tape, the mechanical details of which are shown in Figs.

   39 to 52 and whose electric circuits

  <Desc / Clms Page number 20>

 As a whole are shown in Fig. 4, a control box 56, the overall electrical circuits of which are shown in Fig. 11, and a terminal block 58 receiving the magnetic storage device. 54 and the electrical circuits shown in Figs.

   5 to 10,12 and 13
In order to better highlight the relationships between the various constituent parts of the invention, we will first describe, in general, the overall operation of the system of the different units! considered, and then we will give a general description of the contraction and operation of the different units, as well as a detailed description of the electrical circuits and their mode of operation, and finally a detailed description of the mechanical construction of each constituent mechanical part
The telecommunications installation according to the invention is intended in particular for airborne installations,

  in combination with a radio transmitter 60 and a radio receiver 62 the installation can be implemented by the action of the transmitter 60 transmitting signals forcing a message staggered in time and coded following the classic Baudot code, or be commanded directly by the keypad 50, or even be like. @ from the magnetic storage device 54, the teleprinter making, in both cases, a copy of the message sent.

     The operation of the installation can also be done with a view to storing a communication in the recording device 54 under the action of the keyboard, which communication can be retransmitted subsequently by the transmitter 60, a printed copy being made by the keyboard. printer device, both during storage and during transmission from that recorder. A message recorded in recorder device 54 may be retransmitted multiple times, as long as the message has not been erased on the device. tif recorder.

   The installation can also operate by receiving messages identified by a designation.

  <Desc / Clms Page number 21>

 call corresponding to the unit considered (i.e. to the particular aircraft on which the installation is mounted), or by receiving messages identified by the designation of the group of which the unit is part (i.e. say the group of aircraft in which the aircraft on which the equipment is mounted is integrated); the equipment can also operate to print all messages at the frequency to which the receiver is tuned.



   The printing apparatus 52 receives communications which it records on gear driven paper. It is combined with the signal control circuits by the terminal block 58. The communications received by the receiver 62 are recorded under the form of a sheet and all communications which have been transmitted by the keyboard 50 or by the magnetic recorder 54 are handled by the printing apparatus 52.



   Two lamps 1802 and 1803 on the cover indicate the origin of the communication which is printing. The right lamp 1802 illuminates when communications are coming from the receiving station and the left lamp 1803 illuminates when the printing apparatus is operating under all other conditions.



   The keyboard 50 is provided with a normal set of manually controlled keys intended to effect the transmission by the transmitter 60 of signals indicative of the twenty six letters of the alphabet, plus the signals indicative of the carriage return operations, change of line, letters and spacing, or the storage of these signals on magnetic recorder 54 for later transmission. All communications established on the keyboard 50 are handled by the printing apparatus 52.

   A red lamp 1702 at the right end of the keyboard 50 lights up to indicate the position of the sixty sixth character of the printing apparatus 52, and a red lamp 1703 at the left end of the keyboard 50 lights up to indicate, in the embodiment shown, that five

  <Desc / Clms Page number 22>

 
 EMI22.1
 lines of the tape recorder are available in recorder 54.
 EMI22.2
 



  As long as the eQpH bar.? Soul, .it or. olavisi z3 is sti2 .. held down, closing contacts S-707 (ïg * 3), the designation in code corresponding to 1 as, en'c will be repeated The terminal block 5P -tin box supporting the magnetic register 5 (Flg * 4) a telegraphic extender circuit (Fig, 5) r a receiver circuit 'l; éJ.égrt; l) h1.Í:!. ue ig, 3¯Cta a circuit with system of' call (i3.;,. j, an amplifying circuit; oJ.; Ii'lr
 EMI22.3
 (Fig. 8), rail circuits of cc.m.rlÏ.l.'I. ',, (. IOL1 (1! I ,, 7)> :: 1; 1;' ,;). power supply circuit d1 er .... r: .r:.! .. e (Flg.12} "Lt (, H1.'I? gisi1'6U, the magnetic (] 'ig.4) offers a 2.tyen g ... 'C (i to which one or rainy: comJIJ.1nioations or messages -li:'>.) 1.11 c¯-r .., "¯: .k: ';:" ": ;: "on,;: ':' '.-,: Oj. 5: ./ can be recorded e * s 3'," 'C "" "' f ';",., poar usie;

   r ', - ": ûi :.' T: 'î ta' .'- i'1 automatic later ', f ",: ;;, ..a! (?. 1 of ¯; t. [.J32ai es:?. Â' 0. ::; '4.ti :: d3 ISO ..



  Communication c7îTE = 'l.i.w To, a-i' fJ ± T7.,; ';,; C. '.s'F.m..iH ±, = atitarit they times as necessary, tf., rt:; Y11t: 3 'yt esté v: i': .. the transmitter -telegraphiât "':) 7 t .;:'],): j3't ..! ::. ;; by electronic equipment and c3as olj : ûtt3 #% - s & -rJ.iē, at p.Tù'3'ira oodéo signals éoht!: Lol: 08- qu.5. a on '' - ': J.-3.r'sh SE ç ,, 1! :: d t ':: lS:; t a keystroke 50 or (, 11 and' .. \: .. # h.uxcto 1: çn'8r: .1.f>! .E.L1: "7 magnetiqiae 54.

   The re-acceptance is? L; ::::. Tl \;:.:, - d ';; 1ie (Fi.30) c oorrrested by a ::' device. .-sTJ: ii (a; tG -i of circt.3 intended to transform sj, t ::: t \ n .: <: co <5, & 4cb.eL'i1'i '; :::' :: '7. gozti 1'C 3'pettr 62 en! = daBjaland & i'f.3ài: {: <'.J) .Hlisiés.! 3rd ..e0 ..: 10t, i.ùpn- "! <iil: 'from the device impI'imwl' 52.L'O: system of aprFl (F19) ss6UMBG.n!: ags including a ë-! p8en.t .'.- t-qe - :: 1 ; des ')' - 7.'Cl; 1,: H ,,; agencies of 1: how to switch on 0 'L: rr "-' xi? cji-L. the printing apparatus? 2, according to the indication: fO [) ,;" 'i; "i .; , <±;,:, :(, '11 (' <: ';: j.:;;l\;(L:'? [± ('!.:> 1Sn:!;

   ci ...., receiving station 62. <1l ,; ' Jf0. '. Jôlût .- ,. l: i3ut' # COtll1! "'Z' recorder 54 at the end of the. '. Rts: Wi-3. = N': 'ī:!; ; = 'recording time (Figrenfoi'CJe Ite signals ï & .- o '10 the sgH2tiqu.e tape of said recording arge ... x-ci. being c> .zs-e i' {"; .'3n8i! Ii. ', 3imul¯ taneously, to the printing apparatus 52 and, * # f. :::

  .ÇOl1 che-

  <Desc / Clms Page number 23>

 lonnee, to the transmitter or. the energy source (Fig. 12) comprises electronic equipment intended to convert the available energy source from 115 volts alternating current, 400 periods, into different alternating and direct currents, the values of which correspond to the values of the currents required for operation of the rest of the equipment. A connection connecting a bat-. The 26.5 volt line is also part of this subset.



   A call cord box 64 (Fig. 13) is connected to the front of terminal block 58. It has diode array cavities and circuits that define the signals corresponding to the particular call and the call. Generally for printing apparatus 52. The diode die cavities have interchangeable plug connectors to facilitate designation changes in the calling system.



   The control panel 56 (Fig. 11) is operated by hand to control the various operations of the installation. A rotary selector or switch S-601 determines the type of maneuver to be performed. This switch S-601 has - five positions: TRANS KBS radio transmission controlled by keypad), TRANS ST (radio transmission controlled by the storage device), RCVE (printing of a required radio message), REW (rewinding of the tape from the storage device). 'recorder in the starting position) and ST (storage of a message by the keyboard).

   A lever call switch (CALL) has two positions: IN (input position where only appropriately identified messages are handled) and OUT (output position, where all messages are handled). load), A general switch controls the electric current for the whole group. One lamp 1-601 turns on when the circuit is open and another lamp 1-602 turns on when rewinding of the magnetic tape is performed.



   The terminal assembly 58 of the equipment supplies the transmitter 60 with electrical signals in BAUDOT code and receives

  <Desc / Clms Page number 24>

 
 EMI24.1
 oes signals from post receiver 62. fi
 EMI24.2
 The signals used to designate according to the coda
 EMI24.3
 a character or an operation are of two types: "spacing" signals and "marking" signals ,.

   The first are interruptions set in time d 71.1.1.1. line current the second being coiostituéa by the.3 1mpu.lGioWJ, r, aglées in 3rd time, of this current, iin ooubinant oes two electec-
 EMI24.4
 triques in groups of five, in any way possible,
 EMI24.5
 we get thirty two P.l'an; ofJ16ntij AifférraiiSj :: Ü. =, ï:
 EMI24.6
 of these arrangements being used 001,1 .'n, .r ...: i., f .. '¯.' .. dâ:; s coded corresponding to the alphabet and the other six {} Cr.:m18 dice: .z4 ... coded statements of operations at * viOY5é.3iùiL.



  A signal cI z s;, s, .. 3i f, 1û (1: Gh ..: rj} d.d8 and as ligai of "marking" at the end B,) l1'l cut 'f ;, 1 .; v â'S.t - '.. $ â.ns x ^ v, xa.3ì of five signals ,. t.âiit.i ... he ;. 6b ces â & r i.> I; :: 1m, J '::: l.'01! .C1 pûssifcle the control of dCitlc..i.L'8,4; ± -. and .i. ;;: ua '' "'âe J. éq1:;' J.pS'.n.: '1't:,' ét.DP- taure The signal of d3illal'.l'ae and the cf-tiu r, ': - ¯g:! Ü1l ;; w3reapc}. dant to the messages have a of 3.0 Cv; i2 - ?, the'. '.; ¯ -'. â .... c. ' 'c'¯3' \ ßii'1't on the other hand, a duration lt5 times longer; rad: p O'S.tte i'i1!: iulf: .i :: m stop longer duï "îe oontvicae il the sY ': W: H1J,' oi: use between received equipment * and ':: L ": 5.tGl.;>.' a The principle of fonet.ioiwe>; î6î7u f "1 (l1..lipeent têlé: i1h primeur consists in doing; s :: L; srt :: = ::

   at pos :: i: ',; 1.úcS oodéea of five elements mt3Q1.11: li;:, u .. :: e state t: \,:. ";: 1, r: ï.g, : lC 'de o: lr.q do who re-may or may not be the 5th ..:'; brooding These éiate Zfjl1 fi.
 EMI24.7
 turn, retransmitted and re, a, rtïas ==: 7.:an.r danc lo '; rpssux a single thread. At the yécap-ferioe end, p ü t; st 1 * inverse which takes place, the group of signals: jé-ptirtin suco0; "i '\ ït; .i.'l $ n' in time on a single wire being converted into 1; m group of signals if ' ml'snn.3 distributed over five wires. paya eus cases, the electrical state of the five wires acts in such a way as to bring one of 4lR) i "sb3 lt1Ae8.! ltquea dal'1B one of the thirty-two positions corresponding to the code .

  <Desc / Clms Page number 25>

    



  OVERALL OPERATION
For the transmission of messages to the radio station (the messages being established on the keypad and supplied to the transmitting station in the form of stepped signals and at the same time taken over by the printing apparatus, it is necessary to perform the following three operations, in addition to activating the transmitter:
1-Move the lever of the switch S-603 (Fig.ll) to the ON position; 2-Bring the selector switch S-601 (Fig.ll) to the TRANS KBD position, and 3-Operate the keyboard 50 (Fig. 3).



   To store a message with a view to its subsequent transmission (the messages established on the keyboard being printed and stored on the tape of the magnetic recorder for subsequent transmission), the following four operations must be carried out sl-Move the lever of the S-603 switch in the ON position; 2-Bring the selector switch S-601 to the "REW" position until the lamp 1-602 comes on (the tape recorder being arranged so as to rewind all of the tape on the reel winder, thus bringing the beginning of the tape in front of the recording head: it is the lighting of the lamp 1-602 which indicates that this operation has been accomplished); 3-Bring the selector switch S-601 to the "ST" position;

   and 4-Handle the keyboard 50 (Fig. 3).



   To transmit a recorded message to the radio station (the messages previously recorded on the magnetic recorder are supplied to the sender and taken over by the printer; at the end of these messages, the equipment is located automatically transferred from the TRANS ST position to the RCVE position), three operations must be carried out in addition to switching on the transmitter; 1-Move the switch lever S-603 in the position (ON); 2-Bring the selector-switch S-601 to the "REW" position and wait for the lighting of lamp 1-602; 3-Move the selector switch S-601 to the TRANS ST position

  <Desc / Clms Page number 26>

 
 EMI26.1
 To print the: .s;

  , .s received only preceded by group or identification unit call signals (0'eS1, the normal standby position in which eohs-lomids signals supplied by the receiving station determine on the sheet of the only messages preceded by the group or unitary app01s signals), it is appropriate to o ;; 2: factl.1c.c: coig operations 1-Move the lever of the S-603 switch to position "Olï" j 2-. Bring the coaiKuttur-clect.emr S-601 to the JKJVB position j 3-Bring the lever of the eoc # iutator 3-G02 to the IN position.



  For the support of copies or of received messages, methods of correct call signals, which have the case of messages transmitted to. save it,: *.? a-e.gr.evj.rrae poyj? storage and taking in eh3.ge p :: l'i.2px'i & eL..r, po-r / ár êïx-s. iu <; If'20j.pu by messages XeÇa3e possesses pa .IE gibl1..v:} t: aapi> -: l Gc "? - e - '. J: the keyboard will be blocked juaça where qlte lo sig, .? .. al of "end of message" will have been received that f1.1.1 allows you to unlock the keyboard and come back to the? ii.'3 & es ohax \ î "î local ) it is necessary to carry out tc-ls opéra-5i. "': T. s l-Depaoer the switch lever. eus S- $ 03 .3r ;. position, from' '01." '2-j '.men3r the selector switch S-601 to the SE position; 3-Depls.cer the lever of the. commutat-rar of sppc-X S-JCi exs 1s? 3s: itiùK. input IN.

   If the C33a3; .- 3î} -: '- ""! # - de do.T.c'r Z- signal ùh "end of message' ', the cZï.vïoz- .te?.? Ijloçaéj, 1 & posts âerneu- ting in the reception position. ,, For Iégâs? the call system, the operator cev. ' ! 1 - .. J, '3 -' /; T 2,5 c.u't: a '!' '' '. X'. 'Elieoeur S-601 in position RC; S-Expand the lever of the switch S-602 in position i <CïïT '"I. The cooc; a-tiateu.r ssl3ci; eu.r S-601 can then be the Eo! At.! D in the SIS position and the lever of the S-602 cotatutator in the position 111.



  To receive all un.zt \ &. &8; $ which is the case where the printer AG-C-1 prints all Ida ra.Hsag3S through the radio receiver, 1! operat ear must î 1-Béplae the switch lever * S-603 the ON position, 2-lBiener

  <Desc / Clms Page number 27>

 the selector switch S-601 in the RCVE position; 3-Move the lever of the S-602 switch to the OUT position. This condition can also occur for the ST position or during the line print check, as explained in the previous paragraph.



   Before going on to the detailed description of the electrical circuits it will be useful to give a brief description of the symbolic references used for the graphic representation of these relay link circuits are all designated by the letter K followed by a number of reference. Thus -KlOO- indicates relay 100 or a connection to the coil of relay 100.

   A letter added as a suffix to the reference corresponding to a relay, for example K 100a, indicates a connection with the contact groups "A" of relay 100. The letters in prefixes -C, O, A, - for example CKlOOA , OKlOOA or AKlOOA, denote respectively the normally open and normally closed contacts and the contacts of the armatures of group A of contacts of relay 100 or. connections to so-called contacts.



  The letters R, C, E, V, CE, T, B, S, L and PS, followed by numbers conventionally represent resistors, capacitors, solenoids, electron tubes (vacuum tubes or thyratrons) of crystal or diode rectifiers, transformers and magnetic core storage devices, motors, switches, inductors and power supply terminals, respectively, or connections connecting said elements, .. The letters J and P followed by numbers denote contact sockets and plugs and the letter or number prefixes for these references indicate the connection pins for these sockets and plugs, or the connections which / link.



   Keyboard circuits
The detailed construction of the keyboard will be given later, but, in the meantime, and for a better understanding of the whole, a general description will make it easier to

  <Desc / Clms Page number 28>

 give an account of the overall circuits used The keyboard 50 has twenty-nine keys, a space bar, two red signaling lamps 1802 and 1-803, as well as the corresponding complementary equipment, this keyboard being used during operations radio transmission under keypad action and storage operation,
Five coding bars, intended to mechanically determine the coded signal,

   are arranged below the key levers and extend across the width of the keyboard so that they can be actuated by lowering any key lever. Each coding bar has notches arranged in a without or in the other at the points where it comes in contact with. a key lever; the dimensions of these notches are tilted to the right or to the left, so that a downward movement of a key lever pushes the coding bars either to the right or to the left.

   The notches are such that the first code bar will move to the right if the first unit of the code corresponding to the key down is a marking pulse, If, on the contrary, the second unit of the code is a spacing pulse, the coding bar will be moved to the left For example, by lowering the Y key, the five code units corresponding to that letter are applied to the coding bars by moving the first, third and fifth bar to the right the coding and to the left the second, and the fourth coding bar.



   During "keypad-controlled eniasion" and "store" operations, movement to the right or left of a coding bar switches an elbow lever articulated on the bar. The positions of the elbow lever for each coding bar to the right end of the keyboard controls the engagement of a pair of contacts a When the coding bar moves to the right, the corresponding contacts close; moving to the left, the

  <Desc / Clms Page number 29>

 contacts open.

   The coding bars, numbered 1 to 5, are respectively combined with the contacts S706, S-705, S-704, S-703 and S-702 (Fig. 3). The coding bars 1 to 5 correspond, respectively, to the five unit signals carrying information of the five-signal Baudot code which, together with the start and stop signals, form the group of conventional Baudot code signals. When the contacts are closed, they represent a marking signal in the coded group and if open, a gap signal.



   The movable arms of the S-702, S-703, S-704, S-705 and S-706 contacts are connected together by the K plug of the J-701 and P-701 connectors to the FF connection of the P-601 connectors and J-601 (Fig.ll) of the fixed contacts corresponding to the "keypad control transmission" and "storage" positions of Section 1 of selector switch S-601 and through the movable contact thereof , to earth, when said selector switch is set in one of the two keypad manipulation positions. The fixed contacts of switches S-706, S-705, S-704 S-703 and S-702 controlled by the coding bars are connected, respectively, through the contacts A, B, C,

  D and 33 of connectors J-701 and P-701, via contacts a, b, o, d, e, elements Pl and Jl (Fig. 7A), via normally closed contacts K- 710A, K-710B, K-710C, K-710D and K-710E from relay E-710 (Fig. 7B), to one of the terminals of the windings of relays K-701, K-702, K-703, K-704 and K-705, respectively (Fig.



  7a and 7b). The opposite terminals of these relays are connected together to a 26.5 volt direct current power line (the K-710 relay remains un energized until the S-601 selector switch (Fig.ll) is not set in Its "transmission by storage" position). Thanks to these circuits, the closing of one of the contacts S-706, S-705, S-704, S-703 or S-702 will energize one of the corresponding relays K-701, E-702, K-703o K -704 or K-705 (Fig. 7).

   Therefore, by pressing down a key on the keyboard,

  <Desc / Clms Page number 30>

   the relays corresponding to the marking signals in the coded group which designates the nature of the key down will be energized, and those corresponding to the space signals will remain non-energized.
 EMI30.1
 



  A universal bar is housed behind the coding bars and moves to close contacts S-701 (Fig. 3) each time a key is depressed, the keypad mechanism is arranged such that the contacts S-701 will close
 EMI30.2
 very shortly after 1 'actuated contacts ± -702 to ST06 controlled by the five coding bars. The movable contact of the contact S-701 of the universal bar is connected by the intermediary of a normally closed contact of the universal bar. 'a group of contas'. "of yep & bi- tion S-7 07, commanded by the space bar} to the string-.s T ua plug connector J-70l, laqLLel1etcowe indicated pi'écddscasnt, is set to earth as long as the oocsMta.tr-ëlecisr 8-601 (Fill) is set in]. '1.

   position "emission with command not keyed. '-' oi" position of storage ". The contact fixed fiontast S-7CU. and connects, through coribact F of oQrmt.c't0L1! 'rJ J-701 and P-701 and through contact Z of conneCu \; lu.rs 1'-1 and J-.1 (Fig. 7A), to the coil of relay 2-705 18 the opposite input is connected to the line do 26.5 volts Consequently, the contact S-701 being fûïcié by the bar t: miva1 "" saddle during one or the other of the operations "emission to be commanded by keyboard" or "emaagasiïiagâ" 9 the relay IC-706 will be energized very shortly after the drunken energization of relays K-701 to K-705.

   When the oomEMtateu.T-aeleoteur S-601 (Fig.l1) is set to the "keypad-controlled transmit" position, energizing relay E-706 establishes a ground at the junction between capacitor C-1125 (? igt6) and resistor B-363 of the V313A trip tube input circuit via plug 21 of connectors J-301 and P-301, contact them normally open K-706A
 EMI30.3
 (Fig. 70), plug L of oonneoteurs J-l and P-l (Figù7A),

  <Desc / Clms Page number 31>

 plug EE of connectors P-601 and J-601 (Fig.ll) and the "send with keypad control" contact on stage 2 of selector switch S-601 (Fig.11).

   Grounding of. this input conductor to the gate of the V-313A trigger tube is carried out during the operation "send by keypad control" and gives rise to a cycle of operations of the annular meter or distributor, of the V- tubes. 301 to V-308, which provide, respectively, the eight time-regulated basic signals for controlling the operation of the equipment during the period of a coded group.



   By lowering a key on the keyboard, a blocking corner, to. Mechanical control, engages with the left angled lever .. of the coding bars in the keypad 50- to keep these bars in position after the key is lowered, until this locking member is cleared by excitation of the E-701 keyboard release coil (Fig. 3). The blocker prevents the operator from exceeding the print speed suitable for other devices.

   One side of the E-701 release coil of the keyboard is connected, via the N plug of the J-701 and P-701 connectors, the U plug of the P-601 and J-601 connectors (Fig.ll) , plug Z of connectors J-601 and P-601 (Fig.ll), plug K of connectors Pl and Jl (Fig.7A). to terminal 5 of the power source (Fig. 12) The other side of the B-701 release coil of the keyboard is connected, through the L plug of the J-701 and P-701 connectors , plug K of connectors P-1 and Jl (Fig. 7A), plug 27 of connectors P-201 and J-201 (Fig. 9, to the anode of the V-214 keyboard release tube.



   An input signal is applied to the grid of tube V-214 through plug 26 of connectors J-201 and P-201, plug H of connectors Jl and Pl (Fig. 7A), plug R connectors P-601 and J-601 (Fig.ll), and the movable arm of stage 2A of selector switch S-601

  <Desc / Clms Page number 32>

 When the latter is in the "keypad control transmission" position, the connection is made through the inter-
 EMI32.1
 middle of plug P of connectors J-601 and P-601 (Fig.ll) plug J of connectors Pl and Jl (? ig * 7a) î plug 29 of connectors P-301 and J-301 (Tig. 5 ) and capacitor C-312 of the. ring counter tube V-306 number 6.

   By virtue of this circuit, and when the switch S-601 is in the "send command by keypad" position, the keypad release tube will be made conductive, receiving a pulse.
 EMI32.2
 supplied by the sixth tube of the annular counter (Fi g.6) and will energize the keyboard release coil B-701 (Fig. 3), in order to release the keyboard and allow the operator to manipulate it.
 EMI32.3
 1st.

   When switch S-601 (Fi6.1l) is set to the "storage" position, a positive pulse will be transmitted through capacitor 0-601, normally closed contacts E-601K, M plug of J- connectors. 601 and P-601,
 EMI32.4
 plug 12 of connectors P-801 and J-801 (i'i-g.5), normally closed contacts S-803, which close when the main drive or the shaft corresponding to the operations of the The printer is returned to its stop position, plug 13 of connectors J-801 and P-801, plug N of connectors P-2 and J-2 (Fig. 7C), plug 19 of connectors J-501 and
 EMI32.5
 P-501 (Fig. 4), contacts S-502 which.

   close only when the recording head of the magnetic recorder has completed its operating cycle, the contacts S = 503, .es which are closed as long as the end of the magnetic recording tape n 'has not been reached, from the junction between resistors R-502 and B-503 which form a voltage divider network between ground and a power supply line.

   
 EMI32.6
 gie at 150 volts starting from terminal 5 of the energy source (igo 12) and passing through plug 9 of connectors J-501 and P-501 (Fig, 4),
 EMI32.7
 So if switch S-601 (Fig.l.1) is set to the "storage" position, the last of switches S-502

  <Desc / Clms Page number 33>

 (Fig. 4) closing in the storage device and the S-803 switch in the printer (Fig. 5) will transmit a pulse through the capacitor 0-601 (Fig. 11) to the grid of the tube keypad release 7-214 (Fig. 9) to energize the keypad release coil E-701 (ELg.3) and release the keypad keys, to allow selection of the next signal to be recorded
The keyboard (Fig. 3)

     includes a 1-701 end-of-line indicator lamp, one side of which is connected, together with a 1-701 keypad warning indicator lamp ,. through plug P of connectors J-701 and P-701 (Fig. 3) 9 plug J of connectors P-601 and J-601 (Fig.ll) and plug M of connectors J-601 and P-601, to an external source of 26.5 volts, The opposite terminal of the 1-702 lamp is connected to ground through the S plug of the J-701 and P-701 connectors (Fig. 3) , plug 21 of connectors P-801 and J-801 (Fig. 5) and the contacts - when closed - of switch S-804 of the end of line indicator. - sink 1-701 (Fig. 3)

   is connected to earth through plug R of connectors J-701 and P-701, plug V of connectors P-2 and J-2 (Fig. 7C), plug 20 of connectors P-501 and J -501 (Fig. 4) and the normally open contacts of the switch S-504 end of cutout warning. With the switch S-504 closed, if the flap advances to a position in which a recording capacity of only five lines remains for a new recording, the warning lamp .1-701 (Fig. .3) of the keypad will light up.



   The repeat contact switch, when activated, will open the circuit capable of being established through the S-701 contact of the universal bar, to establish a ground from the K plug of the J-701 connector. , through plug J of connectors P-701 and J-701, plug BB of connector P-601 (Fig.ll),

  <Desc / Clms Page number 34>

 the first floor of the. selector switch S-601- when this is in the "transmission by keypad" position - the U plug of the J-601 and P-601 connectors, the Y plug of the P-l connectors. and J-1 (Fig.7A) to energize relay K-707 (Fig.7C).

     This relay is energized by means of its normally open contacts B and is intended to explain a voltage of --105 volts supplied by terminal 6 of the energy source (Fig. 12), through plug 22 of connectors P-301 and J-301 (Fig. 6), and resistor R-361, to the grid of trigger tube V-313A,
The other contacts of switch S-707 (Fig. 3), in the closed position, transmit the signal through the normally closed contacts K-601E, the V plug of connectors J-601 and P-601 ( Fig. 11), plug H of connector P-701 (Fig. 3), the contacts of switch S-701,

   plug U of connectors J-701 and P-701, plug N of connectors R-1 and Jl (Fig. 7A), to the normally closed contacts K-217D This signal, via plug 9 of connectors P -201 and J-201, and from capacitor 0-221 (Fig. 9) sends pulses through tube V-213, to start the recorder; and through the AK-706B contact terminal and a K-217A normally closed contact and the Z plug of the J-2 and P-2 connectors and the 11 plug of the P-801 connector, it is used to trigger the operation of the printer, in accordance with the following description.



   Circuits of the printing apparatus.



   The printing apparatus is intended to make a printed record during the operations "keypad command transmission", "store", "store command transmission" and "reception" of all messages stored, received and transmitted. In principle, the printer, which is a sheet print receiver, with a character wheel. recording on a roll of paper with continuous feed, comprises an operating shaft and a shaft of square section, on which is arranged

  <Desc / Clms Page number 35>

 the character wheel, these shafts being parallel to each other and at a certain distance from each other, and coupled by a friction clutch.

   A B-801 engine applies torque to the operating shaft through a positive-acting, single-turn clutch (Fig. 5), but the positive-acting clutch is normally kept disengaged by the E-803 solenoid armature. With the solenoid energized, the clutch is engaged and rotates the operating shaft which makes a single revolution.



   The periphery of the character wheel is divided into thirty-two equal spaces, of which twenty-six contain the letters of the alphabet. The wheel is mounted on the square-section shaft and rotates simultaneously with it, which makes it possible to select a character and, thanks to its axial displacement with respect to said shaft, to achieve the different spacing and return movements. The rotation in the dif. different positions of the square shaft is used in conjunction with cams of the operation shaft to perform printing, line change, carriage return, and automatic and simultaneous carriage return operation and line change.

   A sixteen-tooth stop wheel is rotatably mounted on the square shaft, near one of its ends
During an operating cycle of the printer, the square shaft is released and can rotate simultaneously with the opera- tion shaft, also free, but its movement can be stopped in any of the thirty-two positions. possible values of the character wheel. The movement of the square shaft is stopped by energizing either of the E-801 or E-802 solenoids,

   to engage the armature of the energized solenoid with a corresponding tooth of the stop wheel. The armatures of the solenoids of the E-801 and E-802 are arranged at a certain distance from each other on the periphery. rje of the stop line with sixteen teeth so that one acts

  <Desc / Clms Page number 36>

 so as to stop the square shaft in sixteen equi- positions.

   and the other so as to stop the square shaft in a position corresponding to an intermediate position between two adjacent positions among these sixteen positions, which makes it possible to obtain a total of thirty-two positions,
The excitation of each of the solenoids E-801 and E-802 is synchronized during the rotation of the square shaft with the sixteen possible positions in which it can be actuated by one of the switches S-801 and S-802, having each sixteen output segments coupled respectively to the input circuits of the solenoids E-801 and E-802, a slider being mounted so as to be integral in rotation with the square shaft of the character wheel. each printing cycle,

   a single switch segment of all thirty-two segments is actuated to transmit a signal intended to energize the corresponding solenoid and stop the movement of the character wheel shaft and the wheel itself in position desired.



   With the carrot wheel thus set in place, a printing hammer strikes the paper against the selected print character, thereby causing a tear in the light surface of the paper and thus detecting a dark @@ d in the print character. the paper, in the shape of the chosen character If the determined position of the character wheel corresponds to an operation signal and not to a character signal, the printing hammer is blocked by a cam provided on the shaft of the character wheel during the action of the printer, according to the chosen operation: spacing, line feed, and carriage return.



   Referring now to the details of the circuits under consideration, the drive motor B-801 (Fig. 5) is connected through the normally open contacts of relay E-801 to an external three-phase source, of 400 periods, 115 V. The K-801 relay is energized as soon as the general switch S-603 is activated, applying

  <Desc / Clms Page number 37>

 a current of 26.5 volts through plug 15 of connectors J-801 and P-801 (Fig. 5), plug H of connectors P-601 and J-601 (Fig. 11) and by the left contact of the S-603 bipolar switch, to the 26.5 volt battery. The B-801 engine (Fig. 5) is running;

  , therefore, as long as the general switch S-603 (Fig.ll) is closed.



   The selection of one of the switches S-801 and S-802 whose action corresponds to any coded group of five signals of the Baudot system, is carried out under the action of the first signal of the coded group. 'we first consider the operation of the printer abuse the action of the keyboard, as we have specified in connection with the description of the circuits relating to the keyboard} represented in Fig. 3, the closure of contact S-7Q6 of code bar number 1 acts to energize relay E-701 in Fig. 7B. As long as this relay remains not energized, a ground is established through the normally closed contacts of said relay, K-701A, through the normally open contacts K-809A,

   the relays E-809 and K-.808 being energized ,. as will be explained in the following, as long as the selector switch S-601 (Fig.ll) is set in the "store" or "store-controlled transmission" positions, and no signal is 'is received, or in the "keypad control transmission" positions by plug H of connectors J-2 and P-2 (Fig. 70), plug 6 of connectors P-801 and J-S01 (Fig. .5), this mass being applied to the junction of resistor R-806 with resistors R-8Ô7 to B-810. As will appear in the following, grounding this junction point renders the S-802 switch inoperative. ..

   The contact S-706 of the code bar number 1 corresponding, in its open position, to a gap in the first of the five units and resulting in the contact K-701A remaining open (Fig. 7B) and the application of 'a ground through the plug 6 of the switch J-801 rendering the switch S-802 inoperative, it becomes active when a

  <Desc / Clms Page number 38>

 Marking general appears in the first of five units and inoperative when a spacing signal appears in that first unit.

   Therefore, if a tagging signal appears in the first unit of the coded group, contact S-706 (Fig. 3) is closed to energize relay K-701 (Fig. 7B) and establish a mass across the normally open contacts of K-701A, normally open contacts K-808A (the latter being closed during operation) "store", "transmit from store" and "transmit via keypad" plug C of connector J-2 (Fig. 7C), plug 1 of connectors P-801 and J-801 in the network from the input resistor to switch S-801, the latter is made inoperative and switch S -802 is made effective.

   It will be noted that the transfer of the E-701A contact of the armature makes it possible to remove the mass of the resistor network to the S-802 switch via plug 6 of the J-801 connector, so that the S-802 switch operates in response to a sign. marking in the first of five units of a coded group.



   The relays K-702, K-703, K-704 and K-705 (Figs. 7A and 7B), thanks to their transferred or normal position of their armature contacts of contact group A, act for check the individual position in which the square shaft is blocked. The normally closed contacts A of the relays K-702, K-703, K-704 and K-705 act as long as these relays remain non-energized, to establish a ground through the normally open contacts K-809B, K-809C, K-809D and K-809E via the J, K, L and M plugs of the J-2 and P-2 connectors (Fig. 70) to pins 7,8, 9 and 10 of connectors P-801 and J-801 (Fig. 5).

   Normally open contacts K-702A, E-703A, K-704A and K-705A act, when one of the corresponding relays K-702, K-703, K-704 and K-705 is energized, to establish a ground. , through the mating, normally open contacts K-808B, K-808C, K-808D and K-808E, through the D, E, F, and G plugs of the connectors

  <Desc / Clms Page number 39>

 J-2 and P-2 up to pins 2, 3, 4 and 5 of connectors P-801 and J-801 (Fig. 5).



   Therefore, the relay K-702, in its position no. energized, applies a ground to pins 2 or 7 of connector J-801, or, if said relay remains un-energized, corresponding to a spacing in the second unit of the code of five units, a mass will be applied to the plug 7; if said relay E-702 'is energized, corresponding to a marking in the second unit of said code, a ground will be applied to plug 2 of connector J-801.

   Likewise, relay K-703 controls the alternate application of a ground to plugs 8 and 3 of connector J-801, plug 8 being grounded as long as said relay remains un energized and the sheet. 3 being grounded when relay K-703 is energized. Relay K-704 controls the alternate application of a ground to pins 9 or 4 of the eT-801 element, pin 9 being grounded as long as said relay remains un energized, pin 4 being grounded when said relay is energized.



  Relay K-705 controls the alternate application of a ground to pin 10 or 5 of element J-801 with pin 10 on. to ground as long as this relay remains un energized, plug 5 being grounded when relay K-705 is energized.



   As can be seen by referring to Fig. 5, the selective grounding of pins 4,9,5 and 10 of connector J-801, as a result of the actions of the OR-801 and OR diode circuits -803, results in all segments except one of the four left-hand segments 1,2,3 and 4 of switches S-801 and S-802 to ground.

     In addition, the selective application of a ground to plugs 3, 8, 2 and 7 of connector J-801 takes place by the diode circuits OR-802 and CB-804 and, as a consequence, ground of all switch segments 1, 2, 3 and 4 except one, in any one of the groups of four segments of the right half of switches S-801 and S-802

  <Desc / Clms Page number 40>

 
 EMI40.1
 corresponding to any one of the individual switch segments of the left half of switches S-801 and 8-802 for any setting position of relays K-701 to K-705, a selection is therefore made between The S-801 and S-802 switches by the E-701 relay,

     a selection of an individual segment among the four segments of the left half of switches S-801 and S-802 being effected by the cooperation of relays E-704 and K-705 with the diode circuits CB-801 and OR- 803, a selection of an individual segment from among the four switch segments on the right half of switches S-801 and S-802 corresponding to the selected segment from the switch segments on the left half of the switch. these switches being effected by the cooperation of the circuit to
 EMI40.2
 OR-802 and OR-804 diodes with K-702 and E-703 relays.



  A negative direct voltage of 105 volts is applied to the junction between resistors R-830 and B-831 (Freeze?) Through plug 25 of connectors J-801 and P-801, plug J of connectors. connectors P1 and Jl (Fig. 7A) and the mobile contact terminal of E-707B
 EMI40.3
 (Fig.7C) from terminal 6 of the power source (Eig.12) oThis negative voltage is applied through a divi- circuit. voltage sor at the junction between resistors R-805 and R-806 (Fig. 5).



     With regard to that of switches S-801 and S-802 rendered inoperative by the grounding of pins 1 or 6 of connector J-801, the voltage appearing at the junction between resistors R-805 and R-806 is subjected to a total drop across these resistors,
 EMI40.4
 so that the one of the diode circuits associated with it CH 801 or CR-803e is earthed, while that of the circuits CR-801 or CI1-803 which is not earthed by the laz plugs of the .

   connector J-801-or for example OR-803-the negative voltage appearing at the junction of resistors R-805 and R-806 is lowered in resistor R-806 and in the three resistors groups R 807, R 808, R809 and R 81e'1 which are

  <Desc / Clms Page number 41>

 earthed through the diodes of the OR-803 circuit by pins 4, 9 and 10 of connector J801. As for one of the four wires leading to the four left switch segments, designated by the references 1, 2, 3 and 4, of the S802 switch which is not earthed by the CR-803 network, and which is assumed to be segment 4 in this example, corresponding to the ungrounded state of pins 9 and 10 of connector J901,

   negative voltage will appear at segment 4 of the left half of switch S802. Assuming that J801 connector pins 3 and 2 are not grounded and pins 8 and 7 are grounded, as the S802 switch slider moves along the switch segments, the three Left switch segments of switch S802, designated 1, 2, and 3 are grounded so that no signal will be passed through the switch wiper. As the wiper moves along from segment 4 of the left half of switch S802, through the four degrees designated by 4, 3,2 and 1, segments 4,

  3 and 2 have been earthed through the CR-804 network by the earth established on pins 8 and 7 of connector J801. When the wiper moves towards switch segment number 1 corresponding to the right-hand part of switch S802 and corresponding to segment number 4 on the left side of said switch, the negative voltage applied to the junction of resistors R805 and R806 will produce a current flowing through resistor R833, through one of the lower rows of diodes of the OR-804 circuit cooperating with the wire leading to switch segments number 1 of the right half of switch S802, through the wiper and switch segment number 4 of the left half of switch S802 and resistors R810 and R806.

   The negative voltage that builds up at the ungrounded end of the-

  <Desc / Clms Page number 42>

 
 EMI42.1
 resistor R833 is -: ti>; -; - içr ' <# to the grid éP'-Ul tnb- 2.m: ;;:. i.l- indicator V801B, including the anode ee. t: JQuplél3 'by the:. ::',: ';' <iD!; '3 Ru., at the grid of a t :: be -thyratron? 3C4 in 1 i rsuii. anodic from which is mounted the .301Ólloid Marking .t.8 ('?.



  Therefore, when this circuit is t: ïr .: n will iu- #. Negative choice will be applied to tUt> 9 -: r? C: 13; d.uriar. '. nais- sanoe aune impu, lsil1n :: u,!. Jj1.v <,: at tuse \ 1'2) 6, t. .. 't "Fy' .. #, me this thyratron tube in circuit eu txi, ## ± ##., o aoXérurle '', 0 'from which the armature comes.'>, i1.5i t, jû taken ;? t ..,. '!': c; .e;) (3l.:3 "" with sixteen teeth fixed on. Hû: i: Ó <2 ,,:, = ,; ... 1: - ¯¯; -s; .. 'r¯¯: L ± JI :: 1.m, - "" and allows B. to finish: v 1t ... y': '.t : .1 ;, ", n Ta:; t A:.:. :::.: '0 In C.'c38 ti: .. 2 ;;,:;!? # = :. aïiVfe <-; 6 "; 3Ë: i '¯ 8. five units had; éué: .AL .-: ± -1 #' -, L.z ^ '.,. Rr: iC .... 4.,'; .I, <= i. '=' i.ar. and not a signal ': 1e, t, C'.t.;, "', I Wy, .i: fL - '. J .:' ;; qt; ..:; '1,:.'" ¯.'f ;: 6 of element J801 ètsis air-.

    j In L =., ... s, 1. ¯ ¯..sx.À .: 1 not being at ma8S 8 the r-i, 3 ';,:.:, Bl ::. 1 .- '2, :: ,,; , ¯ F.f .-- ,,: with diodes 0: & - 801 and C ':: X'2 1:'. ' la c .. .. 'a r î ± c.: i,' -r.20i would have applied a 'tre: 3iCl: i. âi.v.¯: ': -. Cc. a 1 :; r, ¯.? of - ;, n.1:;: 1: i < <a..a. :: 5¯ ^ cator V801A, aux bounded. *,: ;; la r oj.utair3e HSS1, pcdi.-i9. '' t a positive signal at,:: v ..>: '1:, l'8 [' 1.? '- ".. 1C .: li., :: t jH g.?:..j.!.-; of the thyratron tube V50,; r #. *>, .. :: j t. - .. i .1 <. ...., ¯ .. # 5 &, spaces ME t.! Lt ttr ">" ';, 1 i ..;' - t.3? ;:,: -: 1 é '"":, l3. ,:;,! '.:. 9, \ 'a I ratchet has sixteen teeth -37 va- # s-ps: .1 #;, 16 due to the square shaft in a rt> ïùūXé3 fl'un i-; i 3 second turn of the , nar, .t. <3q ¯,:. ' , :: hè '; l'l "' i .L,: '1 ..', r: tr; been blocked under t ..-): 1 i.4 :.

   (; <id,>: i \: ':. Gj: (L.' \ 0 à: aw-r; "à r '1'f32" Thanks to these c Axis il * :. t.) ut,.: ; aiùf. one pi te permutative of the cOt: .t ;; nta.-t: eCiX'15 (.o {) Ul: li.-r.¯d ';,:; P'4 '.1. ::; IJ1sX '' '' with code S702e S703,:, v04,: ir el. 7 (; f,) "..", 'J'1i d', ¯o .., - :, Ll ', 0: 1,;:, movement of 1 t arb, c tïti.w4: PÜyl.' ,; ¯2.t the irone L:; ,-,YOU\'; t8,; "\; 1> 3 in one of the 32 posivîoiia pa-: r '..> 1t;: à: =. r¯, .., .. 6 ¯: -i =;. the position of permutation of 1) d1'.rdi d *. * a ode, the advancement of lii, r, t3 of l '\ pi2J' and l ',: i,': H1;>

  <Desc / Clms Page number 43>

 of the printing hammer and the character wheel are either automatic, or controlled by keys, or manually.

   The automatic line feed and line feed functions act mechanically when the character wheel and printing hammer reach the far right side of the page as will be seen later. This feature prevents loss of copy when the line feed signal has not been received after the 72nd character. The key-controlled line feed and carriage return functions are controlled from the separate keypad 50 or from other teletransmitter equipment. The Baudot code signal corresponding to the carriage return determines the operation of both the line change and the carriage return mechanisms by the placement of the square shaft.

   Carriage return and line change of the printer are also performed automatically by lowering a button provided on the upper right side of the printing device. The carriage return and the change of line of the printer in response to the signals take place mechanically after the positioning of its square shaft corresponding to said signals.



   The type wheel and printing hammer are attached to cables wound on drums and a ratchet engaged with a pawl and an escapement provided on these drums keeps them spaced across the page A spring is wound up when taking place the spacing, the release of the pawl and the escapement allowing the return to the beginning of the line of the hammer and the character wheel.

   The printing hammer is blocked and prevented from striking the paper when a designation corresponding to a function is: received. The mechanism is controlled by

  <Desc / Clms Page number 44>

 
 EMI44.1
 gears and clutch from induction motor
 EMI44.2
 three-phase B801.
 EMI44.3
 A lamp 802 (Tig. 5) indicates, by lighting up. ,
 EMI44.4
 that the message recorded by the printing apparatus comes from the radio receiver station 62;

   another lamp 1-803
 EMI44.5
 indicates, by lighting up, that the iwlirimeur device controls a message intended for the transmitter station 60, so3t from. keypad 50, or from device d 1 (1G.1i1: lgasiï: lage 55 The lamps 1802 and 1803 are connected together by one of their terminals, by 1 ..terrs !! '. ir.i ace of sheet 26 connectors J801 and Je801, the fîohz, 2 of the aQrillG1: r'P601 (Fig.ll) and by do la, sheet 1,: LeE 'soynec-. tears J601 and P601,, u: 3rd aug " 'X'tCl; l. "L: 6 current ;;, 11n-r1r ::. 1 of 26.5 volts.

   The opposite side of the larp 1802 ast connected to the ground via the plug l? rings-. J801 and P801 (Fig.ll), by the noxmally open contacts K601G of the relay K601 which e, 4t exci6 during the operation "transmission by keypad '' transmission by storage" and "reception" in each room where a corresponding signal to a message is received by the dî5ppoi-4îf at
 EMI44.6
 from an external source, using the R plug of the
 EMI44.7
 tor J601 and P601, form B dfs 41aùlcii '';:. z <:. er J¯l (Fig.7A), and by aon'1. ': I.cts nornaltjnt fa ::' '' '- ill.é3 K808I' of relay K808 (which is energized: r, af. operations “keypad-controlled transmit”, “6LllInagai3i- nage transmit” and “store” during actual transmit and store), (Fig # 7D), so that the .eapx:

   1802 (Fig.5) lights up when relay X601 is energized (] tig.l1) in response to a received signal, and also lo: tli.-fûBID,: P.3 that relay Z08 remains un-energized known c 'is the case when the selector switch 3601 is 5toi +, in its position
 EMI44.8
 "reception" or, during reception of a message when said switch is in the "stored" positions

  <Desc / Clms Page number 45>

 swim "or" store-controlled emission ".



   The 1803 lamp (Fig. 5) is connected to earth via the plug 16 of the J801 and connectors.



  P801, plug P of connectors P601 and J601, (Fig. Il), normally open contacts K601D of relay K601, plug N of connectors J601 and P601, plug S of. connectors P-1 and J-1 (Fig.7A) and by the normally open contacts K808F of relay K808 (Fig.7D). Simultaneous energization of relays K601 and K608 indicates that the message is being transmitted.

   When the selector switch S601 is set to the "send by keypad control" position or when it is set for the "send by store" operation, and the relay K808 is energized, the lamp 1803 turns on. . when the switch S601 is set in the "transmission by storage" position or in the "storage" position, the relay K808 being in its "reception" position and a signal being received, it is the lamp 1802 (Figo5) which switches on. illuminates (Fig.ll).



   Another lamp 1801 is connected between the ground and the common connection of the lamps 1801 and 1802 to the plug 26 of the connector J801 (Fig. 5), which is intended to illuminate the page of the printing apparatus.



   A cam provided on the spacer drum actuates a switch S804 in the 66th character position, to allow illumination of the end-of-line margin lamp 1701 (Fig. 3) of the keyboard, as explained. previously, in conjunction with the description of the keyboard.



   Another switch S803, single-pole and two-way, is shown in the closed position in Fig. 5, a position in which it remains as long as the friction-drive main shaft of the printing apparatus is in its position. stop and

  <Desc / Clms Page number 46>

 
 EMI46.1
 used to connect terminals 12 and 13 of Cfonnaoteurs J801 and P801. In all other cases, the contact is transferred
 EMI46.2
 for earthing the connector fjohe 12
 EMI46.3
 J801 and P801, by resistor Li834. This C01JlID.u:!; Atel '!' '*'>; oi1; part of the coupling circuit coreeapondant to the unlocking coil E701 of the keyboard, as explained previously.
 EMI46.4
 



  When the description was given of the stopping of the square shaft of the printing apparatus, we had
 EMI46.5
 assumed 3 usc, u.'here, that this shaft was rotating. Before
 EMI46.6
 that the said shaft can turn, it is necessary to
 EMI46.7
 disengage the armature from that of solenoids B9Úl and E802 last excited, from t, cat, sixteen teeth and allow to make a connection from eni.l'a: t11e, ne;.: rt fie l * '3'br main motor aVS3 the coiuniaïide motor B801 3 This main motor shaft is coupled to the. B301 engine via an i2nic toar clutch mechanism
 EMI46.8
 controlled by the maneuver of. transfer solenoid or
 EMI46.9
 intermediate fez803.

   In order to trigger an operating cycle of the printer, a positive impulse is applied, through plug 11 of connector J801 and the ccndensatsl '
 EMI46.10
 0804, to the grid of tube V805 which is thus made conduc-
 EMI46.11
 tor to energize the E8C solenoid; and xe> b e 4rs the drive connection between the main arb9 of the printing device and the ESOI motor.

   The same impulse is applied, through the condeneatear 0803, to the grid of the
 EMI46.12
 tube V803 which, in turn applies a negative impulse through capacitors 0801 and 0802, to the anode circuits of thyratrons V802 and V804 for soups that of these two tubes which is conductive and de-energizes that of the
 EMI46.13
 solenoids E801 or E802 previously energized, releasing
 EMI46.14
 thus the sixteen-tooth roohet and the square shaft of the printer
 EMI46.15
 die to allow the rotation of this ns-bre by the main motor shaft, through the eonnexirm to

  <Desc / Clms Page number 47>

 friction provided between them.



   The above positive impulse applied via plug 11 of connectors J801 and P801 arises in three different ways: :( 1) the operation of the universal bar of the keyboard (2) by the operation reproduction of the magnetic recorder during transmission, and (3) by operation of the telegraph receiver.



   Plug 11 of connectors J801 and P801 is connected, by plug Z of connectors P2 and J2, to the
 EMI47.1
 K217A status contact of relay K217. This relay is energized by establishing a ground to the normally open contact Fi2lF by energizing the relay E216, which occurs when the transmitter is 3i:

   on to apply a voltage of + 26e5 volts to connector AJ2 through connector 13P201 (ii g.) 9 resistors R262, R239, connectors 10J201 and P201, relay K216 (Fig. 7C) 'terminal AT2178 has a -1; 011 -:;: 1.0n positive of 210 volts at the 4PS terminal (Figol2) 9 for the operations "send by keypad command" and "euiscion by storage" and when the correct identification of a unit call or of a general broadcast call has been received by the equipment via receiver 62 set in the "transmit" positions.
 EMI47.2
 storage ", Ilc, -Llagn, -ir-2, -ell or" reception ", and when the equipment is set to the" reception "position and the call switch S602 is in the" output "position .



  These last two operations will be explained in more detail below. The relay K217 being de-energized during the actual storage operation, the normally closed contact of E217A is connected to the armature contact.
 EMI47.3
 of I706F3, the latter contact also being connected to the normally exerted contact of K217D.

   When the selector switch S601 is set to the storage position (Fig.ll),

  <Desc / Clms Page number 48>

 
 EMI48.1
 and relay E706 is energized by operating contact S701 of the universal bar (Fig. 3), plug 11 of connector J801 (Fig. 5) is connected - via the normally closed contacts K217A, the normally open contacts
 EMI48.2
 E706B, the Y plug of connectors J2 and P2 (Figo70), the Y plug of connectors Pro01 and J601 (Fig.l1) - at the junction between resistors R602 and R603, forming a voltage divider network for the voltage of 150 volts applied via the Z plug of connector J601, as previously described via the mobile arm of hostage 4A of switch S601,

   when the latter is
 EMI48.3
 located in its position dtemmaC3.sinaJe This positive signal applied through plug 11 of connector J801 during the storage operation triggers the operation of the main motor shaft and the square shaft of the printer, as described in the drawing:,
During any reception operation and when the transmitter is in operation during the operations "transmission by keypad control" and "storage by
 EMI48.4
 keypad ", relay K21? is energized in a Q way, .E ::

   the armature contact of K217A connects the plug 11 of the. connector P801 (Fig. 5) to plug 19 of connector P201 (Fig. 9 which is connected to the cathode of the cathode load tube V210A During reception operations, the grid of this
 EMI48.5
 tube receives its input energy from the delayed multivibrator V209A and V209B, through the 33 connector of the P201 connectors, the normally closed contact X112B, de-energized during operations ":

  receiving "," rewinding ", and" storing "and energized during operations.
 EMI48.6
 rations "transmission by keypad control II and" transmission by storage ", relay K215 remaining de-energized.
 EMI48.7
 delayed vibrator formed by the tubes V209A and V? 09B receives a pulse through the capacitor 0212, the

  <Desc / Clms Page number 49>

 plug 34 of connectors J201, P201, normal contacts
 EMI49.1
 K3.12C and plug 8 of connectors J301 and P301 (Fig. 6) from the cathode of tube V308 with number 8 ring meter distributor.

   When the latter (Fig.V308) is switched on at the end of each cycle of the ring counter, a positive pulse will be transmitted to the delayed multivibrator formed by the tubes V209A and
 EMI49.2
 vro9B (i''ig.9), q4ī will make the cathode-ray tube conductive, the latter thus providing an impulse
 EMI49.3
 positive at plug 11 of connector J801 (Pig.5) During operations 1! 0miss: lL. with keypad control ".

    and "transmission by storage", the transfer pulse to the printing apparatus via the plug 11 of the. connector J801 (Fig. 5) is also taken from the cathode of the cathode-ray tube V201A, through
 EMI49.4
 plug 19 of connectors J201, OI21? A and Z2,: ,,; i in the 'Omitted by keyboard control' position, the grid of the V201A tube is controlled by a signal taken from the
 EMI49.5
 cathode of the first distributor tube Z1301 (FVs; .6), through connectors 7P301, Og710F (Fi ;;

  .7), AT..ll0f, OK1.12B, i.K112B and 12P201 (Fig.9) and, in the "emission by storage" position, the grid of the cathode-load tube V201A is controlled by a signal taken from the cathode of the second distributor tube V302 (Fig. 6) by
 EMI49.6
 through connectors- 28P301, OE710F (F.g.7), AE710F, OK112By AK112B and 12P201 (ig.9).

   Consequently, in the "send command by keyboard" position, the transfer impulMon to the printer takes place when the machine is primed.
 EMI49.7
 prei,> jer distributor tube through the normally closed contacts K71O1? and, in the "transmission by storage" position, the transfer impulse to the printer takes place by starting the second distributor tube, via
 EMI49.8
 normally open contacts K710P.

  <Desc / Clms Page number 50>

 
 EMI50.1
 Block d enumc.3awïzi-, t;

  e
This unit is a magnetic tape recorder and reproducer intended to record and reproduce the signals indicative of the information transmitted in the form of the Baudot code. In the current embodiment
 EMI50.2
 of the invention, the tape is made of steel of sufficient width to allow recording of at least five positions for recording width information at. raccoon.
 EMI50.3
 



  In each recording doping cycle, the recording t0 '..: i IU501 (Fig.4) is brought to. move alternately across the width of the tape which remains fixed, moving this head S '\ j "" Ht; 1! loh: r.oni.3 ";:" "' .; 1"; the friction movement of an ooïïwatatear S |; 01 through five contacts or segments corresponding to the five units? or moments of the Baudot code to ci:

  "1 mor ante - Between each recording unit of the recording head, the strip advances longitudinally of a recording space by means of a chain drive wheel which engages in a series of longitudinal perforations along one edge of the metal recording tape This chain wheel is controlled by the B501 engine through a friction-controlled escapement mechanism
 EMI50.4
 As previously specified, when a message is to be stored in the recorder for subsequent transmission, the articulated lever of the
 EMI50.5
 switch S603 (Fig.l1) is moved to its operating position,

   selector switch S601 is moved to the rewind position. until this is, the lamp 1602 lights up, the selector switch S601 is then brought into its storage position, the unit thus being ready to operate by operating the keyboard.
 EMI50.6
 



  Moving switch 8601 (l, ig.11) to its rewind position establishes a ground on one side of the

  <Desc / Clms Page number 51>

 rewind relay K501 (Fig. 4), through section 1 of switch S601, plug HH of connectors J601 and P601, plug M of connectors P2 and J2 ,. and plug 14 of connectors P501 and J501. The opposite terminal of said relay is connected through plug 15 of connectors J501 and P501 to a voltage source of 26.5 volts of the general supply line (Fig. 12).



  The energization of the rewind relay K501 reverses the connections between the tape drive motor B501 and the three-phase power source, in order to reverse the direction of rotation of said motor and cause the tape to advance in the opposite direction by relative to its initial starting position. When the ribbon reaches its starting position, the direction indicator switch S505, reset, closes to apply a mass - via plug 21 of connectors J501 and P501, plug W of connectors J2 and p2 , the K plug of elements P601 and J601 - to the connection provided on one side of the I602 lamp, the opposite side of which is connected to a 26.5 volt power source through the M plug of the connectors J601 and P601. By lighting up,

   lamp 1602 indicates to the operator that the storage tape is rewound. the ribbon drive chain wheel is then automatically and mechanically disengaged from its drive when the ribbon is returned to its starting position.



   The selector switch S601 (Fig.ll) is then adjusted to its "storage" position to de-energize relay K501 (Fig.4) and restore the normal direction of drive of the tape drive motor B501, in re-establishing the connections necessary to allow information to be stored in the recorder, under the

  <Desc / Clms Page number 52>

 keyboard control. When the selector switch S601
 EMI52.1
 (iÊ.11) is placed in its "storage" position, a mass is applied - via stage 2 of the. switch S601, the DD plug of the J601 connectors and
 EMI52.2
 P601, file .II. connectors Pl and Jl (Fi, = x. ¯) - to one terminal of the coil of relay K714 (Fig.7B), to energize the relay K71-9 its opposite terminal being connected to the supply line at 26, 5 volts.



   A mass is also established by this
 EMI52.3
 connection to the relay via the plug of connectors P901 and J701 (Fi .8), to energize relay K901. The energization of this last relay makes it possible to apply an alternating current of 6.3 volts supplied by terminal 2 of the energy source (Fï.2) - and via plug 34 of connectors P901 and J901 contacts normally; open K901A,
 EMI52.4
 plug 42 of connectors J901 and P901, plug 6 of connectors P501 and J501 - to the cancellation coil L501
 EMI52.5
 (1'i5.4), the opposite side of which is earthed by terminal 1 of the energy source ('i.12), by 1'.: Zuc-rm-. diary of plug 7 of connectors J501 and P501 (yj.4).



  The L50i erase coil is arranged in such a way in the recorder. quiz the rcb ':. 1, n recorder on steel must pass through the erasing La-Se L501 before reaching the PU501 recording head, when the said tape advances in the normal direction.



   As a result the excitation of relay K901
 EMI52.6
 ('i8), the wiper / 1 Ju switch 5501 (Fi.4) is also connected to one of the sides of the recording pie PU501, via plug 13 of the
 EMI52.7
 connectors J501 and P501, plug 44 on the connectors P901 and J901 ('i, 8), the noimally closed contact K902A, plug 40 with J901 and P901 connectors, plug 11 of

  <Desc / Clms Page number 53>

 connectors P501 and J501 (Fig. 4). The opposite side of the recording head PU501 is connected to the ground via the plug 12 of the connectors P901 and J901 (Fig.S).

   Through this connection, any voltage that appears between segments 1 to 5 of switch S 501 will produce a current flow in the PU501 register head (Fig. 4) allowing recording on the tape as the S501 switch slider moves along these segments.



   Segments 1 to 5 of this switch are connected by means of pins 1 to 5, respectively, connectors J501 and P501, to the normal contacts.
 EMI53.1
 as Be 0., D and E of relay I71., the latter being energized - oora # .0 as indicated previously - when selector switch S601 (Fig.ll) is in its "storage position ". The armature contacts A, B, C, D, E of relay K714 are connected to the contacts normally
 EMI53.2
 open B relays ET 01, K7023 It'7c, 3 I.70.- 'KT05, respectively Remember that when operating the keypad, relays K701 to K705 are energized under the control of the switches '3706 to S702 controlled by the coding bars (3? Igo3) and that when one of these switches closes, the one of the relays I701 to IC7O5 which corresponds to it will be energized.

   The contacts B of the armatures of the relays 1 (701 to 1705 are connected together to the armature contact K71.P, which, when the relay IC714 is energized during recording, is connected to the direct current supply line. at 26.5volts, through the contact
 EMI53.3
 OK71.F.
Thanks to this assembly, the movement of a coding bar in the keyboard in order to close one of the commu-
 EMI53.4
 S706 to S702, bar coded controllers, act to apply a 26.5 volt signal to the corresponding segment.

  <Desc / Clms Page number 54>

 laying segments 1 to 5 (Fig. 4), which, as the wiper of the switch S501 moves in synchronism with the recording head PU501, produces a current flow through said head, thus than recording a signal,

   in a position transversely with respect to the ribbon, corresponding to the displaced coding bar.



   The start-up magnet of the E501 recorder (Fig. 4) is connected between terminal 5 of the energy source (Fig. 12) at + 150 V, via plug 9 of connectors J501 and P501 and the anode of the tube V213 of the triggering magnet of the recorder, via plug 8 of the J501 connectors and. P501 and plug 16 of connectors P201 and J201 (Fig. 9). The grid of this tube receives pulses when the rail K703 is excited by the contact S701 of the universal bar, via the plug 9 of the connectors J201 and P201, AK217D, CK217D, AK706B, OK706B, YJ2 and YP601, to from the junction of resistors R603,

   R602 connected to a + 150 V energy source via the terminal in the "storage" position. The same signal constitutes the transfer pulse applied to the printing apparatus from the AK706B connectors, via the CK217A, AE217A, 2J2 and 11P801 connectors, as explained previously.



   During the storage operation, contacts A of relays K701 to K705 act, via the normally open contacts of relays K808 and K809 (Fig. 7D), so as to apply a mass, alternating - event to pairs of plugs. 9 - 5.10 - 3.8 - 2.7 and 6.1 of connector J701 (Fig. 5), in order to check the positioning of the square shaft with character wheel, as previously described for relays K808 and K809 are excited

  <Desc / Clms Page number 55>

 during the recording position, applying a
 EMI55.1
 earth via connectors J1,, BP601, AK601B,

   CK601B and the switch section '3 storage contact S61 A printed recording can thus be made from the information stored in the recorder.



     When it is necessary to transmit a message, which has been recorded, to the radio transmitter, the switch
 EMI55.2
 general B601 (Fig.ll) is brought to the "baked wax" position and the selector switch S601 is placed in the
 EMI55.3
 "rewind" position, until lamp 3:

  602 lights up, for the purpose of rewinding the steel recording tape to its starting position, as previously described, and selector switch S601 is then moved to its "recorder transmit" position. Said switch being in its "transmission by recorder" position (Fig.ll), relay K901 remains de-energized, while relay K902, one of the sides of which is connected, by means of plug 43 of connectors J901 and P901, at the 26.5 volts line, is energized by the grounding of its opposite terminal, via plug 31 of J901 and P901 at one side of the coil of relay K710 ( Figo7B) as a terminal, via plug W of connectors Jl and PI, plug W of connectors P601 and J601 (Figoll),

     section 5A of the switch
 EMI55.4
 tor 5601., plug W of connectors J601 and P601, plug P of connectors PI and JI (Fig. 7A), normally closed contacts K215B, plug M of connectors Jl and Psi, plug 00 of connectors P601 and J601 (Fig. 11) 3 and 1 stage,:, i switch S601, and to earth.

   Relay K215 is connected to the anode circuit of the end of message V211 detector tube of the "storage transmission" position (Figo9) This relay is energized by the transmission of the

  <Desc / Clms Page number 56>

 end of message signal, at. the end of transmission of a message from the storage and acts to return the circuit to its "receiving" state, for the recording of the incoming signals.



   Referring again to Fig. 8, with relay K901 de-energized, the ungrounded side of recording head PU501 (Fig. 4) is connected, via plug 11 of the connectors J501 and P501, plug 40 of connectors P901 and J901 (Fig. 8), normally closed contacts K9C1B, on the non-earthed side of the primary winding of transformer 1 connected to the input circuit of the grid of the tube amplifier V901A, the output of which is connected to the grid of a tube amplifier of a second stage.

   The relay K902 being energized as described previously, the anode output of the tube V901B is connected to the wiper of the switch 8501, by means of the contacts K902A normally open, the plug 44 of the connectors J901 and P901, the plug 13 of the connectors P501 and J501 (Fig. 4). As indicated previously, segments 1 to 5 of switch S501 are connected to the normally open contacts A to E of relay K714 (Fig. 7B), and which are also connected to pins 6, 7, 8, 9, 10 respectively , connectors P901 and J901 (Fig. 8), which are respectively connected to the normally open contacts B, C, D, E, F, of the relay K902 which, energized, for example, as in the "transmission by storage" operation , acts so as to connect these terminals to the circuits of the input grids of the V902, V903 thyrations tubes,

   V904, V905 and V906.



   Thanks to this assembly, loser: the operation "transmission by storage, and as the recording head and the switch move in synchronism through the tape, signals are produced.

  <Desc / Clms Page number 57>

 in the recording head PU501 (Fig. 4) these signals being amplified by the tube 901 (Fig. 5) and applied to the trotter of the switch S501 (Fig. 4). This signal is distributed over the five wires, in synchronism with the movement of the recording head PU501, by the switch S501.

   A signal recorded at position 1, 2, 3, 4: or 5 through the tape recorder will act through the circuits to prime the corresponding thyratron tube, among thyratrons V902 through V906, respectively. The ignition of any one of these thyratrons makes it possible to excite that of the relays K904 to K908 which is connected in its anode circuit.

   These relays will remain energized and the tube associated with them will remain conductive until it is released by energizing the K903 relay by energizing the V104B tube (Fig.B), in the anode circuit of which the relay is connected. K903 via plug 36 of connectors J901 and P901 and plug 16 of connectors P101 and J101 (Fig. 10). The timing of the excitation of relay K903 to cut off the positive line B of thyratrons V902 to V906, as well as V104B, will be explained below.



   Normally open contacts A of relays K904 to K908 are connected via pins 11 to 15 of connectors J901 and P901 to normally open contacts A, B, C, D, E of relay K710 (Fig. 7B).



   It will be remembered that during the "transmission by storage" operation, relay K710 is energized in parallel with relay K902, as explained above. The Tala relay being activated, the normally open contacts A to E of relay K710 are connected respectively to the coils of relays IC701 to K705. Therefore, the energization of any one of the relays K904 to K908 will produce the energization of the corresponding relay of the relays.

  <Desc / Clms Page number 58>

 K701 to K705.

   As previously described in conjunction with the "keypad control transmission" operation, the permutative energization of relays K701 to K705 controls the application of a ground to terminals 1 to 10 of connector J801 of the device. printer (Fig. 5) via the normally open contacts of relays K808 and K809 (Fig.



  17) to control the printing operation. In the "send by keypad" and "send by storage" operations, relays K808 and K809 are energized via contacts TJ1, BP601, AK6C1B, OK601B, WP601, PP1, CK215B, AK215B, MJ1, CCP601 and section 3 of switch S 601 and to ground.



   Thanks to the assembly described, the selective excitation of relays K904 to K908 (Fig. 8) acts to selectively apply a mass to terminals 1 to 10 of connector J801 of the printing mechanisms with controlled printing, in the manner previously described in relation to the c control of the printing device and keyboard control.



  Therefore, during the "transmit by store" operation, the printing mechanism is operated to produce a printed record of the signals supplied by the recorder and transmitted as will now be described.



   The pulses supplied by the distribution tubes V302 to V306 n 3, 4, 5, 6 and 7, are applied through the diodes CR-301 to CE-.305 (Fig. 5), terminals 1 to 5 connectors J301 and P301, to contacts A to Normally closed of relay K.714, and to contacts B normally closed of relays K701 to K705, respectively.

   The armature contacts B of relays K701 to K705 are connected through a common connection to the armature contact K714F and the normally open contact K112F. The normally open contact K112F is also connected via plug 6 of the

  <Desc / Clms Page number 59>

 connector P301 (Fig. 6) and the DIES OR-306 and CR-307, at the output of the seventh and eighth distributor tubes V307 and V308.

   During the "transmission by storage" operation, relay K112 is energized by means of plug U of connectors Jl and Pl (Fig. 7A), plug A of connectors P601 and J601, normally open contacts A of the relay K601 (Fig. 11), plug W of connectors J601 and P601 (Fig.ll), earthed by contacts B of relay 215 when selector switch S601 is in its "transmission to transmission" positions. keyboard control "or" transmission by storage ", as explained previously.



   It follows from the previous explanations that, staggered in time with the operation of the distribution or circular metering system of Fig. 5, a staggered signal will appear at the normally open contact K112F, this signal containing a pulse supplied by those of the distribution tubes V302 to V306 cooperating with one of the energized relays K701 to K705, and a pulse supplied by the seventh and eighth tubes V307 and V308. The relay K112 being energized as explained previously, this signal train is applied to the plug 7 of the driver tube V402 (Fig. 12) which controls the operation of the signal relay K404.

   in order to apply a ground to the plug B of the connectors Jl and P1, forming the output connection of the stepped signals supplied to the radio transmitter.



   This assembly makes it possible, during the "transmission by storage" operation to detect the five-unit signal recorded in the recorder (Fig. 4) and to convert it into simultaneous signals represented by the selective energization of relays K904 to K908. (Fig. 8), used to control, via relays K701 to K705, the printing mechanism according to the meaning

  <Desc / Clms Page number 60>

 presented by the signal, and to produce, under the control of the circular distribution or metering system (Fig. 6), a time-scaled signal intended to be sent to the transmitter, and indicating the same information as that of the signal detected in the recorder.



   The time-scaled signal supplied to the transmitter during the "keypad send" operation is created and output by the same circuits used for the "store send" operation, which come from 'be described
Distribution channels in transmission
It has been assumed, until now, that a series of pulses supplied by the distributor tubes V301 to V308 will be applied to carry out the control of the cyclic operation of the circuits, without giving, moreover, an explanation on the operating mode concerning the source of these impulses.



   The linear distributor of the circular distribution system advances one step for each pulse applied to the pulse bus bar. With a circular seven-tube system, using output number one as the start pulse, outputs number 2 to 6 for marking number 1 to 5, and output number 7 as the stop pulse, a d shape must be applied. The exciter pulse consisting of six 22 msec (milli-seconds) pulses and one 31 msec pulse bar pulse, to produce 7.42 Baudot code elements. One of the crucial problems in obtaining a stable and precise time base is in obtaining a stable oscillator.

   A variation in reactance of one of the components, to obtain the frequency necessary for the

  <Desc / Clms Page number 61>

 The output of the pulse with a duration of 31 ms is compatible with the requirements of a stable oscillator. It is therefore necessary to use a continuous frequency source and to obtain the variation of the pulse intervals by other means.

   If the variation of the pulse intervals is to be effected outside the oscillator, for example by dividing the rate of the time base oscillator, another problem arises in connection with the production of said pulses. 7.42 code elements Suppose that a frequency is chosen such that, divine by means of an appropriate circuit, 100 periods would produce pulses 22 ms apart, and, on division of these, 142 periods would produce intervals of 31 ms.

   By using periodically triggered circuits, controlled by the distributor, it would be possible to apply to the bus bar exciting the ring a suitable pulse train to obtain 7.42 code elements, the accuracy of which would be. depending on the precision of the oscillator and the divisors. Since the numbers 100 and 142 are divisible by two, the frequency could be split into two, which would lower the divisors to 50 and 71, respectively. The numbers 50 and 71 not having a common factor, they represent in this case the smallest possible divisors, It is possible that only one divisor is used for the production of the two totals, by a control external to the circular system , but in all cases the necessary circuits are complex.



   In order to simplify the basic timing circuit, it has been found useful to modify the code corresponding to the 7.42 elements, while maintaining the current standard equipment using a 7.42 element code.



  The use of 7.5 elements offers a solution which makes it possible to obtain an extremely simple time base. The difficulty

  <Desc / Clms Page number 62>

 
 EMI62.1
 cult to produce a code 7.2; '-:. :: -: iyw comes from i. particular lengths of F, 11 (1 :: ;; "J ...: &" I; The 00, lrJ to 7.42 elements requires an impulcioa dl'J.: r'l "ê'ls to 15 sl- lie, giving a tau ... ::: Il \ ;: 2 Ù. '' 5 {,, -, - J: 'contribution to: -: im'p'; l :: cJ: 1S of marking and dJI ! i # 'J:, "- G.

   According to the invention, this stop pulse is obtained at C01! Li: ilLl1t dG.1X distributor outputs, a pulse of 11 as well as a pulse of 22 ms, to obtain anse im'pl1: ': iol1; , 11 ar..cGt of 33 nis. The transmission circuit ii'used axes the equipment of the present invention: .. 't -'sß :: eW: FS in Fig. 6 and comprises: (1) an oscillator ziel 1. - ".: b -., + '.,. 1. t." .-.,. '. at 272j, 7 periods (2) a first frequency divider ootananjë by said oscillator at 272.7, ic, ',. t¯īOGd: fy pG! Ll23eS1G' lOf periods;

   (3) un 8euxi.ê ::, di ris because of i'rvcz.ziüe by the first, dividing its: 'r': u.> T¯ ^ t in 45? 1 4 pei-iodef ;;,;, '.. 1 :):' when the tube c? I; 3tr? - -. v107 1), - '(; 1 ::::: "0 7 est. si;, é the voltage supplied by Ct-,: 1" ,: t-, r.Wú applied 8: .1, dt =' .1.- xth divisor of frequuruîC 'ai 1.'0y.-1 inoperative the division function. Ta r <"- 3altat -la r? At- .ß action '36 translated by the output n.-tmro 7 1, i is axoited for 11 ms; (4) the cathode tube as3e7 * vio '32 .3. (H) - oiutltu a sura of weak excitation: impéiLt1ce applied, ia bar # omnibus of impulses by 1.i'LterJJ1Ú! itil.r '; of plug 10 of connector J301.



  When there is no transmission, the fcubs this output V308 number P-: r .- ("f ': -!., C' excites the distribution system or the combe e # ¯ roui; .ire is cut using a de.enc: = avr! t: rx = ¯v = -i =: w 1 '' tube. ¯;: z, D <':' 5 excitation pulses, jont :: tl, pliq'.lév8 À. 1, .1 control busbar at 45.45 Péìo5e3. For operation at

  <Desc / Clms Page number 63>

 commanded by keyboard, the periodically triggered tube is blocked for a sufficient time interval to allow an excitation pulse to turn on. the first tube of the circular system V301.

   The circular system then lowers its frequency to the period corresponding to tube number 8 and stops. The width of the trigger pulse is not critical and is not taken into account for the timing of the signal, except that the triggering of the emission can be delayed by a maximum value of 22 ms after pressing a key. The use of a frequency greater than the 90 periods required by the time base results in a reduction in the effects of vibration of the reed control circuit.



   The general circuit corresponding to the time base is shown in Fig. 6 For all operations other than receiving an external signal, this circuit is controlled from the base tube transmitter-oscillator V312 (Fig. 6 ) which, with the adjuncts shown, constitutes a reed-driven oscillator, operating at 272.7 periods. The output of this oscillator, applied across resistor R357, is connected, through capacitor 0317, to the grid of a first frequency divider circuit, formed by the tubes V309A and V309B,

     this circuit acting in such a way as to produce an output frequency through the capacitor C319 at 90 periods ps The signal at 90 periods applied through the capacitor C319 is connected to the input of a second frequency divider forms the tubes V310A and V310B, whose flow rate is 45.45 periods ps This output signal is taken from the mobile potentiometer arm of @ R352 and transmitted to capacitor 0321, at the input of the grid input of the tube to

  <Desc / Clms Page number 64>

 cathode load V311B.



  * The circular counting circuit or distributor circuit formed by the tubes V301 to V308 - each of them being a thyratron - presents a normal terminal state in which the tube V308 is conducting the other tubes not conducting, Thanks to this assembly, a only of the tubes V301 to V308 can lead at any time and the conductive state of any of the tubes of the circular distribution system effected the priming of the adjacent tube, immediately above, of said system, so that the pulse next applied to the circular system will switch on said upper adjacent tube,

     @n suppressing all the others The output signals of the tuba with cathodic load V311B are applied - through the capacitor 0322, of the plug 19 of the connectors J301 and P301, the normally open contacts K112E (Fig. 7D), plug 9 of connectors J301 and P301 (Fig. 6), resistor R301 -, to the grid of the first tube V301 of the circular distribution system, and to the junction between resistors R366 and R337 of the voltage divider circuit corresponding to the cathode of the eighth tube V303 of said system.

   The signal from cathode-ray tube V311B is also applied - through plug 20 of connectors J301 and P301, contact them normally open K112D, plug 10 of connectors P301 and J301 and capacitors 0302, 0304, 0306, J308 , C310, 0313 and 0315, in parallel, - to the grids of the V302 tubes. V308, to tubes number 2 to 8 of the circular distribution system.



   Normally, the first distributor tube V301 is polarized in cut-off (or "out-off") by the negative voltage of 105 volts applied to its grid by the intermediary of the plug 26 of the contactor J301 and the resistors.

  <Desc / Clms Page number 65>

 tances R337 and R301 ... As long as this cut-off bias is maintained, the eighth distributor tube V308 will remain conductive, while the other tubes will remain non-conductive.



   The anode of a periodically triggered ignition tube V313A is connected to the junction between the resistors R335 and R336 of the voltage divider circuit where the polarization is checked at the first distributor tube V301 during the "emission operation. with keypad control ", when the tube V313A. Conduit junction between resistors R335 and R336 is effectively grounded, thereby reducing the bias applied to the grid of tube 301, sufficiently.

     so that a pulse supplied by the cathode-ray tube V311B, through the terminal 9 of the connector J301, acts to make the tube V301 conductive when it becomes conductive, the tube V308 is cut.



   The grid of the periodically triggered tube V313A is connected, via resistor R361 and plug 22 of connector P301, to the normally open contacts K707B .. Relay K707 is energized for all the positions of the switch. selector other than that corresponding to the "transmission with keypad control" position, by applying a mass to the coil of relay K707, by means of section 1A of selector switch S601 (Fig. .ll) the U plug of connectors- P601 and J601, the Y rod of connectors P1 and Jl (Fig. 7A).



  Relays K707, being energized, is capable, by its normally open contacts B, of applying a negative voltage of 105 volts, from terminal 6 of the power source, to the grid of the ignition tube V313A, by the '' via plug 22 of connector P301 (Fig. 6) and resistor R361 When switch S601 (Fig.ll) is placed

  <Desc / Clms Page number 66>

 in its "keypad-controlled transmission" position, the plug 20 of connector J301 is connected, as previously described, to the movable arm of section 1A of the selector switch (Fig. 11), which is connected, in the "transmission to position. keyboard control ", via plug BB and plug J dt.

   s P701 connectors and
J701 (Fig. 3) to. normally open contact of the @ epéteus S707 contacts controlled by the space bar. By operating the latter, plug J of connector J701 is connected to plug K of this connector, which, in the "transmission to keypad command ", is earthed, as described above. 0 Grounding the grid of periodically triggered tube V313A in this manner (Fig. 6) will prime tube V301, the first tube in the distribution or circular metering system, and keep it running for as long as the said repeater contacts are closed .Dc this way,

   the circular distribution channel will continue its cycle of operations.



   The grid of the periodically triggered tube V313A is also connected to the normally open contact K706A via the capacitor 0325 and the plug 21 of the connectors J301 and P301 (Fig. 6). As explained previously, relay K706 is energized in the "transmission with keypad control" and "storage" position by actuation of the universal earth contacts S701 (Fig.3). The AK706A armature contact is connected to earth through plug L of connectors J1 and P1 (Fig. 7A) and EU plug of connectors P601 and J601 (Fig.ll), and through section 2 of selector switch S601 in its "keypad control transmission" operating position.

   Thanks to this assembly, and for each operation of energizing relay K706 (Fig. 70),

  <Desc / Clms Page number 67>

 a mass applied through plug 21 of connector J301 (Figo6) and capacitor 0325, makes it possible to make the periodically triggered tube V313A temporarily conductive, so that a pulse from the cathode load tube V311B applied Via plug 9 of J301, as described previously, can prime tube 7301, the first tube in the circular distribution system.

   The tubes V301 to V308 of this circular distributor system will be successively primed by receiving pulses, through plug 10 of connector J301, supplied by the cathode-ray tube, until the eighth distributor tube V308 is again primed, the circular distribution circuit remaining in this state until the pulse is transmitted again to the periodically triggered tube V313A.



   During the operation "transmission by storage", the operation of the circular, distribution or counting system is triggered by the lead impulse which is applied, through the capacitor 0221 (Fig. 9) to the release tube of the tube. 'recorder V213, through connectors 15P201, gJl (Fig.7) LP601 (Fig.ll), AK601F, OK601F, section 3A of contact S601, connectors P601, NP1 (Fig. 7), AK215A , CK215A, 27F301 (Fig. 6) and resistor R334.

   During the "reception" operation, the operation of the circular distribution system, or counting, is triggered by an impulse supplied by the tube (Fig.10), via connectors 9J101, CK112E, AK112E and 9P301,
When the seventh distributor tube V307 is fired the resulting output signal is applied from the junction of resistors R329 and R330, to the grid of the delay tube V311A whose cathode is connected

  <Desc / Clms Page number 68>

 in parallel with the cathodes of the dividing tubes V310A and V310b,

     and to ground through resistor R349 This makes the dividers inoperative for the duration of an output cycle of the first divider formed by tubes V309A 'and V309B, so that the next signal occurs 11 ms after switching on. circuit of the V307 tube, with the tube switched off and the V308 tube switched on.



   Reception operations.



   When it is desired to record all the calls received by the receiver, regardless of the call identification signal preceding them, the selector switch S601 (Fig. 11) is brought to its "out" position.



   Under these conditions, the relay K601 is energized by the application of a ground, through section 3 of the commitator S601 and the call switch S602, the coil of the relay K601, the other end of which is connected. to a 26.5 volt source by means of the general switch S 603
A ground is also applied - via section 2 of the selector switch S601s to the call switch S602 of plug AA of connectors J601 and P601t of plug F of connectors P1 and Jl -, to contact normally closed ,, forming terminal, K113A, via plug 32 of connectors P201 and J201 (Fig. 9), to resistor.-252 of the gate input,

   and to the 32nd V210B reenolation tube, which thus becomes conductive ... Relay K216 is connected between the energy source plug 4 (Fig.12) by means of the E217B switching contact forming a terminal and the anode. the V210B tube (Fig. 9) via plug 10 of connectors P201 and J201 and resistor R239. The energization of relay K216 allows the application of a mass to relay K217, to energize the latter, through the normally open contact.

  <Desc / Clms Page number 69>

   K216B.



   An input signal formed by a start signal, -.oing, code signals and a stop signal are applied from the radio receiver, through plug A of connectors P1 and Jl and from the rod P6 of the starters P101 and J101 (Fig. 10) and of the capacitors C102, and of the resistors R129, R132, R135, R138 and R141, to the grid of the starting tube V104A and of the coincidence detector tubes V102B, V105A , V105B, 'V106A and V106B respectively.

   By applying the start pulse for starting the V104A snorkel, a signal is generated which is transmitted to the input output of the first distributor tube V301, through plug 9 of J101 and P101, normally closed contacts K112E , of plug 9 of P301 (Fig.5) This signal acts to switch off the eighth distributor tube V308 and to switch on the first distributor tube V301, thus triggering the operation of the circular distribution or metering system.



   When it is conductive, the V308 tube applies a positive voltage - through plug 8 of connectors J301 and P301, of the normally closed contact K112C, of plug 8 of connectors J101, P101 (Fig. 10) and resistor R101- to the grid of the periodically triggered tube V10là, the cathode of which is connected in parallel with the cathode of one of the time base multivibrator tubes V103B of the receiver and to ground via resistor R112 .

   As long as the V101A tube is conductive, the multivibrator tube remains inoperative. When the eighth distributor tube V308 is cut (fig. 6) and the first distributor tube V301 is switched on, this positive voltage becomes negative to cut the tube V101A and allow the tube based

  <Desc / Clms Page number 70>

 time to operate as a multivibrator. Thus, the triggering of the operation of this tube is controlled by the starting pulse applied to the starting tube which moves the circular distribution circuit of Fig. 6 from its eighth position to its first position.

   The output of the receiver multivibrator tube (Fig. 10) is differentiated and applied to the grid of the amplifier clipping tube V101D. the positive output signal supplied by the anode of tube V101E is connected, - through plug 10 of connectors J101 and P101 and the normally closed contacts K112D and plug 10 of connectors J301 and P301 (Fig. 6) , - to the input circuits of the second to eighth distributor tubes V302 to V308.

   These pulses allow the circular counting circuit to be advanced step by step until it reaches the eighth position, in which the positive voltage of the cathode of the V308 tube can make the periodically triggered tube VICIA conductive and terminates. .! - the operation of the multivibrator (Fig. 10).

   The cathodes of tubes V303 to V307 are connected - via pins 11 to 15 of connectors J301 and P301 and pins 11 to 1+ and 21 of connectors P101 and J101 (Fig. 10) to the input circuits of the tubes coincidence V102B, V105A, V1C5B, V106A and V106B, respectively. If a marking signal is applied, via plug 6 of connector J101, simultaneously with the application of a pulse 5 , 4, 5, 6 or 7, to tubes V102B, V105A, V105B, V106A and V106B, one of these tubes will be made conductive. Magnetic memory cores are connected in series with the anode of each of these coincidence tubes, so that if the coincidence tube is made conductive,

   one of the magnetic memory cores of cores T101 to T105 which cooperates with it will be able to store a signal.

  <Desc / Clms Page number 71>

 



   When the eighth distributor tube is triggered again, the signal applied via plug 8 of connector J101, as described above, is applied via capacitor C101 to the grid of relay tube V102A, of which the The anode is connected, via memory cores T101 to T105, to terminal 5 of the energy source (Fig. 12) using a plug 16 of connector J101, This pulse through the at T105 memory cores T101 / acts to produce an output pulse through the conjugate capacitors 0105, C110, C112, 0114 and 0116 for those cores in which a signal has been stored. These capacitors are connected in parallel,

  via pins 1 to 5 of connectors J101 and P101 and pins 1 to 5 of connectors P901 and J901 (Fig. 8) and normally closed contacts B, C, -De B and F of relay K902, to the grid of thyratrons V902 to V906. Therefore, when a read signal is transmitted from the read tube V102A, through the magnetic cores T101 to T105, for each of those cores in which a signal has been stored, that of thyratrons V902 to V906 correspond. laying will be initiated to energize the conjugate relay of relays K904 to K908 These relays storing the input signal and establishing the printing matrix of Fig. 5,

   as previously described
When the seventh tube 'of the circular counting system of Fig. 6 starts up, during the next successive cycle of said system the signal applied through plug 21 of connector J101 (Fig. 10) to the grid of the fifth coincidence tube V106B is also applied through the capacitor 0115 to the positive terminal grid of the rupture tube V104P to make the latter conductive. The anode of the latter tube

  <Desc / Clms Page number 72>

 is connected, through plug 16 of connectors J101 and P101, of plug 36 of connector P901, to the coil of relay K903, the opposite side of which is connected, by its own contacts, to terminal 5 of the source (Fig.



  12), via plug 9 of connectors J901 and P901. The energization of relay K903 acts in such a way as to deactivate any of the thyratrons V902 to V906 which has been activated and cut the power supply to the positive terminal from the energy source to the positive terminal of the rupture tube V104B (Fig. 10), returning it to the non-conductive state.



   The signal applied through capacitor 0115 is applied through diode CR101 at the junction between resistors R121 and R122 to apply a negative signal through resistors R128, R131, R134, R137 and R140, to the gate of each V102B, V105A, V105B, V106A and V106B coincidence tubes.



   Call system.



   The call system according to the invention provides an electronic system for identifying the start of a coded message and call signs, determined by the element appearing in its place in a sequence and acting in such a way as to prevent the call. operation, of the equipment upon receipt of the letters constituting the intermittently received call signals, forming part of a transmitted text In the present invention, the call signal consists of a two-letter warning signal , followed by a permutation of three of the 16 letters of the keypad, for a particular unit and for a general call signal. For example, a possible call would be constituted by the combination LTRS-LTRS AB 0.

  <Desc / Clms Page number 73>

 



   Referring to Fig. 13, showing a circuit diagram of the block closed by the call cord box circuit, there are provided sixteen sockets or receptacles numbered A to P, respectively. Six interchangeable diodes CR1 to CR6 are provided, diodes CR1 to CR3 corresponding to the first, second and third letters of the call of a unit and diodes CR4 to CR6 corresponding to the first, second and third letters. of the group call "These interchangeable diodes can be plugged into any of the sockets A to P shown in Fig. 13. As indicated above, the call of a unit will be formed by the combination ABC letters-letters,

   and the group call by the letter-letter combination OF F. Thanks to this arrangement, the call of a unit can consist of any set of three letters chosen from the letters A to P, in any order anyone wanted, and the group call can consist of a set of three letters chosen from the remaining letters, arranged in a desired order
The output wires of the interchangeable diodes CR1 to OR6 are connected, respectively by means of pins 5 to 10 of TBlet of pins 2, 3, 4, 5, 6 and 7 of connectors P201 and J201, to the general circuit of the system. 'call, Connection of the CRI diode, via plug 2 of connector J201,

     is made at the junction of resistors R210 and R212 in the voltage divider network between the tubes V202 and V203. The connection of the diode CR2 through plug 4 of connector P201 is made at the junction between the resistors R218 and R219 and the voltage divider network between the tubes V203 and V204. The connection of the diode CR3 by plug 3 of the J201 connector is made on the junction between the resistors R223 and R225 of the divider circuit

  <Desc / Clms Page number 74>

 voltage between tube V204 and tube V207 c The connection of diode CR4 via plug-5 of connector J201 is made on the junction between resistors R211 and R213 of the voltage divider circuit between tubes V202 and V205.

   The connection of diode CR5 via plug 6 of meter P201 is made on the junction between resistors R229 and R230 of the voltage divider network between tubes V205 and V206. The connection of the diode CR6 via the plug 7 of the connector P201 is carried out on the junction between resistors R234 and R236 in the divider circuit of transfer between the tubes V206 and V208
Referring again to Fig. 13, terminals 1 of sockets A, B, D, E, F, J and K are connected together with plug 16 of connector TB1; plugs 1 of sockets C, G, H, I, L, M, N, O, P are connected together to plug 11 of connector TB1.

   The pins 2 of the sockets P, A, C, G, I, J, K, L are connected together to the plug 17 of the connector TB1; and the pins 2 of the sockets B, D, E F, H, M, N, 0 are connected together to the plug 12 of the connector TB1. Plugs 3 of sockets J, O, A, B, D, E, G, L are connected to. plug 13 of connector TB1, and plugs 3 of sockets C, F, H, I, K, M, N, and P are connected together to plug 18 of connector TB1. The pins 4 of the sockets A, E, H, I, L and p are connected together to the plug 14 of the connector TB1; plugs 4 of sockets B, 0, D, F, G, J, K, M, N and 0 are connected together to plug 19 of connector TB1.

   The pins 5 of the sockets A, 0, D, E, F, I, J, K and N are connected together to the plug 15 of the connector TB1; and plugs B, 0, H, L, M, 0 and P are connected together to plug 20 of connector TB1 All pins 6 of sockets A to P are connected together with plug 4 of connector TB1. TB1 connector

  <Desc / Clms Page number 75>

 is connected to terminal 1 of the diode CR8 forming a terminal, to terminal 1 of the diode CR9 forming a terminal, (ig.7D), through plug 21 of connector P901 to the normally open contact B of the relay K904 (Fig. 8).

   Plug 16 is connected to terminal number 1 of diode CR7 (Fig. 7A) and through plug 26 of connector P901 to the normally closed contacts B of relay K901, therefore, and as long as the relay K901 remains not energized, we apply a mass to plug 16 of connector TB1 and no mass is applied to plug il of connector TB1. By energizing relay K904, we apply a mass to plug 11 of the connector TB1 by removing the ground from plug 16 of connector TB1. Likewise, plugs 12, 13, 14 and 15 of connector TB1 are connected to the normally open contacts B of relays K905, K906, K907 and K908, respectively (Fig. 8) and plugs 17 to 20 of connector TB1 are connected respectively to Normally closed contacts B of relays K905 to K908.



   It follows from the assembly shown that the selective excitation of the K904 relays. to K908 (Fig. 8) acts through its contacts B of :! so as to apply a ground to at least one of the input terminals of each of the sockets A to P (Fig. 13), except the socket - if necessary - having the designation of the letter corresponding to the letter identified by l 'selective energization of relays K904 to K908. For example, if relays K904 to K908 are selectively energized to identify the letter A, a ground will be applied to at least one of the terminals of sockets 3 to P of the circuit of Fig. 13, but no ground will be applied to the terminals d inlet of socket A.



   Plug 4 of connector TB1 is connected to terminals E1 (Fig. 7C) to the normally open contact K217A (Fig. 7B) and by means of plug 19 of the connector.

  <Desc / Clms Page number 76>

 tor P201 (Fig. 9) at the cathode of the V210A periodically triggered tube. Therefore, each time the T210A tube has turned conductive, a positive amplitude signal is applied to terminal 6 of each of the sockets A to P. For those of the sockets, in which one of the terminals 1 to 5 is set. ground, as explained previously, by relays K904 to K908, no signal is transmitted to output terminals 5 to 10.

   As for that of the sockets to which no earth is applied to terminals 1 to 5, an output signal can be transmitted to terminals 5 to 10 if one of the interchangeable diodes CR1 to CR6 is plugged into this socket therefore, the plugs being inserted into the sockets as shown in Fig. 13, and assuming that no earth has been applied to terminals 1 to 5 of socket A, a positive signal will be transmitted to plug 5 of the connector TB1, which signal, as will be remembered, is applied to the junction between resistors R210 and R212 (Fig. 9).



   Signals of this type transmitted to the circuit of Fig. 9 have no action unless they are preceded by two-letter acronyms and then only if they appear in the proper sequence. therefore, the elements being stuck as shown in Fig.13, or if the waxing of Fig.9 should become active, the "letters" signal should be received twice and then the signals A, B, C should be received in this same order, without the intervention of the spacing signal, before the element was renewed capable of receiving.



   The circuit of the "letter" diodes is shown in Fig.?A. Its terminals 1 to 5 are respectively connected to pins 26 to 30 of connector P901 (Fig. 8) and they are normally closed contacts B of relays K904 to K908.



  As long as any of the relays K904 to K908

  <Desc / Clms Page number 77>

 remain un-energized, a ground will be applied to one of the terminals 1 to 5 of the socket of the diode CR7 (Fig.7A) to prevent the transmission of a signal through this element. If all the relays K904 to K908 are energized, no ground is applied to these terminals 1 to 5 and the signal, supplied by the slave cathode tube V210A (Fig. 9) will be transmitted to the plug 7 of the CR7 socket, by the 'Intermediate of the normally closed contacts K216A, of the plug 1 of the conneotor P201 (Fig. 9) and of the capacitors 0202 and 0203 in parallel with the grid circuits of the tubes V201 and V202.

   Normally, and in the absence of an input signal, none of the tubes V201 to V208 is conductive. 0 The tube V201 is primed in such a way as to conduct by means of the connections of its gate circuit, by the 'via resistor R201, to the positive high voltage input terminal, via plug 31 of connector J201. Applying the first "letter" signal through diode CR7 (Fig.7A) and plug 1 of connector J201 (Fig.9), will trigger tube V201.



  The priming of this tube, through the resistance circuit, applies a starting voltage to the tube V202, so that the "letters" signal received immediately afterwards will cause the tube V202 to be primed. removes thyratron V201 and applies a starting voltage to tube V203 and V205, ie the first tubes of a unit's call count circuit and the general call count circuits. It should be noted that, due to the common connections of the anodes, only one of the thyratrons V201 to V206 can be made conductive at any time.

   If, when the circuit of Fig. 13 is arranged as shown, the letter A follows the second "letters" signal, a positive signal will be applied through plug 2 of the connector. J201 at the junction

  <Desc / Clms Page number 78>

 -between resistors R210 and R212, which will produce the ignition, of the V203 tube and the extinction of the V202 tube. If the letter following the signals corresponding to two letters was a D, and not an A, a signal would have been applied through plug 5 of connector J201 to the junction between resistors R211 and R213 to prime the tube V205, - the initial counting circuit of the general call counting circuit - and switch off the V202 tube.



   Assuming again that this is a letter-letter ABC call signal, the letter B will produce the application of a signal through plug 4 of connector J201 at the junction between resistors R218 and R219 to prime tube V204 and cause tube V203 to shut off. 0 The final letter C will cause the application of a signal through :, area of a plug 3 of connector J201 at the junction between resistors R223 and R225, to start tube V207.

   The anode of tube V207 e, t connected through resistor R239, via plug 10 of connectors J201 and P201 and the coil of relay K216, to armature contact B of relay K217, forming a terminal , to terminal 4 of the power supply (Fig. 12), providing a current of 210 volts. Therefore, the ignition of thyratron V207 will cause relay K216 to be activated.



   The energization of relay K216 makes it possible to apply a mass through the intermediary of the normally open contacts B of the relay K217 to energize the said relay and through the./ plug. connector J2 and plug E of connector P201 (Fig. 11) to energize relay K601. the excitation of relays K217 and K601 can be used to set up an assembly making it possible to receive and print the incoming message.

  <Desc / Clms Page number 79>

 



   If the three letters following the letter-letter signal had been D, E, and] ?, a successive application of voltage would result at the junction between resistors R211 and R213 of the input circuit of the V205 tube, at the junction between the resistors R229 and R230 of the input circuit of the tube V206, and at the junction between the resistors R234 and R236 of the. V208 tube input circuit. The input signal supplied to the tube V205 would have caused the ignition of this tube and the excitation of the tube V206; and the final input signal to the V208 tube would have caused the excitation of this tube and the excitation of the relays K217 and K601, as indicated previously.



   As generally indicated in the present description, if a spacing signal is received between any signals of the calling code, it means that the signals requested are not. not a call designation of the unit and they will restore the circuit of Fig. 9
The set of CR9 spacing diodes is shown in Fig. 7C. Its terminals 1 to 5 are connected, via plug 21 of connector P901, plug 22 of connector P901, plug 3 of the CE diode? forming terminal and plug 28 of connector P901, plug 24 of connector P901 and plug 25 of connector P901, to normally open contact B of relay K904, to contact
B normally open of relay K905,

     to the normally closed contact of relay K906 and to the normally closed contacts B of relays K907 and K908, respectively. Therefore, when the gap signal is received, which energizes relay K906 and enables relays K904, K905,
K907 and K908 to remain un-excited, the cathodically loaded signal applied to terminal El (Fig. 7C) acts through terminal 7 of @ diode CR9 and pin 30 of connector P201 ( Fig. 9) and capacitor 0219,

  <Desc / Clms Page number 80>

 to cause the V212 Reclose tube to conduct, thereby applying a negative signal through capacitor 0220 to the anode circuits of each of tubes V201 to V206, in order to switch off any tube of the circular counting system which has been primed.



   The end of a message signal consists of two successive line change signals. The line change diode is the CES diode, Its terminals 1 to 5 are connected respectively to the plug 1 of the diode CR9 forming a terminal and by means of the plug 21 of the connector P901, to the plug 2 of the.

   diode CR7 forming a terminal and via plug 23 of connector P901, to plug 4 of diode CR9 forming a terminal and through plug 24 of connector P901, and to plug 5 of diode CR9, forming a terminal and via plug 25 of connector P901, to the normally open contacts B of relays K904, K906, K907, K908, and to the normally closed contacts B of relay K905, Consequently, relay K- 905 being energized and relays K-904 and K-906 to X-908 de-energized, the line change signal has been received and the signal from the cathode-ray tube V210A (Fig. 9) appearing at terminal E1 (Fig.



  7C) is transmitted to the normally open contact K216A. With relay K216 energized upon completion of the convictable call sign signal, this signal is transmitted through the normally open contacts K216A, through plug 1 of connector T201 and capacitors 0202 and 0203 in parallel with the grid circuits of the tubes V201 and V202.



   In the same way that it was explained previously with regard to the two-letter signals indicating the triggering of a call signal, the deax line change signals successively excite the tubes V201 and V202. The excitation of the thyratron V202 applies, via the

  <Desc / Clms Page number 81>

 resistor R253 a signal through the plug
14 of connector J201, the normally open contacts 0 of relay K217 (energized during the reception operation), through plug 13 of connector P201 (Fig. 9) and capacitor 0216, at the grid 'of the . thirty-second tube. V210B recloser.

   The anode of this tube
V201B is connected in parallel with the anodes of the tubes
V207 and V208. The conductive state of the V210B tube makes it possible to reduce the anode voltage at the terminals of the thyratrons V207 and V208, in a sufficient way to switch off both of these tubes which may be conductive. tubes V207 or V208 are used to de-energize relay IC216 (Fig. 7C) and thus de-energize the relays
K217 (Fig.7D) and K601 (Fig.11), and return the receiver to its normal condition.



   During the "transmission with keypad control" pqsition an end of message signal is used to trigger, via resistor R253 (Fig. 9), the end of message detector tube V211, so that a pulse received when the signal is transmitted through plug 8 of connectors J301, P301 of the cathode of tube V308, to the normally closed contact of relay K112C, forming a terminal, through plug 8 'of the connectors. 'nectors J201, P201 and capacitor 0218, thyroid tube V211 will be primed. .Relay E215 is connected to the anode circuit of the end of message V211 detector tube., Via plug 11 of connectors J201 and
P201.

   This relay is connected via plug V of connector Jl (Fig. 7A) and plug X of connector
P601 (Fig. 11), to section 4A of the selector switch
S601 in its "emission by storage" position, so as to apply a voltage of 150V through relay K215 to the anode of tube V211 (Fig.9). Therefore, in transmits-

  <Desc / Clms Page number 82>

 as a signal of the end of messiah during the position
 EMI82.1
 "transmission by storage", in. shine KS15 3rd found excited.

   The element is thus returned to its position
 EMI82.2
 "reception"
Keyboard
The keyboard is on the whole of the classic type used in teleprinters but it includes some special mechanisms which will be described (reference is made to Figs. 14 to 19).
 EMI82.3
 According to the èJ3. 14 and 15 the ftlair-isï- 5G comprises an awning plate 101 and two flanges 102 and 103 attach to this de.cn ..:. '' 1 '.

   L..I 'oini.iae of himself.? C: 1;: i. ':, i',:,:; ., In each flange 102 and 103 have maa.,; É4 six i: enêlz '.-: #> vertical and parallel 1C4, which com. tJ.-tli.8nt) e8 gui lC1 ..; es for five notched coding bars 106, 107 s 102, 109 and 110 and a universal coding terminal a6ErC-1e'3 -will handle to be able to coali3s to the right and to the left Right and left fexxurcs-sQPport6 112 and 113 for coding bars are attached to the rice plate 1 - :: '.; 38 101, below coding bars 106 \ ¯ï1¯. 'a..er-rtred left support 112 supports an omni axle the spare parts 114 and rollers, no. 1.' '' 'I> r <f; f ':; 1t'-S, which cooperate with the lower edge of each coding bar, t constitute a system of j. orleaient allowing 1 ",. 3; '! JiJltiC E.' ,. G11t longitudinal.

   The straight support bracket Il'1 supports an axis 115, on which are mounted five angled levers l @
 EMI82.4
 of contacts conjugated with the coding bars, and nn lever 117 soual, q to an elastic action, these levers being maintained at a certain: - ,. axc. l <= s from each other by means of rollers 118 which support 1 right end of the oodage bars. The greyhounds weld 116 and 117 have
 EMI82.5
 a portion in the form of a screed, sé-t, Entd.n-t around 11.:- high,

  <Desc / Clms Page number 83>

 and disposed along the side of a corresponding code bar which fits around a code bar shaft 120 attached to the side of each code bar.



   Each of the five elbow contact levers 116 comprises a horizontal arm, the end 121 of which constitutes a contact actuator. The elastic elbow lever 117 is in a position adjacent to the single bar:! saddle 111 and is articulated by means of the axis 120 of the latter in the manner described in connection with the angled contact lever 116. However, the horizontal arm of the elastic lever extends towards the left side of the printing apparatus and cooperates with a spring 122 attached to a finger integral with the base plate ICI, thus biasing the universal bar 111 towards its left position.



   Conventionally, the upper edge of each coding bar is cut from a basket to form a certain number of inclined notches the obliquity of which is turned to the right or to the left, whereby the lowering of a key 124 and the corresponding bar 125 moves a bar the coding, in a predetermined manner to the right or to the left. Due to the cooperation of the five coding bars 106 to 110 with the contact levers 116, any coding bar moving to the right swings its contact lever 115 clockwise (Fig. 14). so as to close independent sets of contacts combined with each contact lever, under conditions which will be explained.

   Any movement to the left of one of the coding bars 106 to 110 causes the conjugate contact lever 116 to tilt counterclockwise, such displacement having an action such that the conjugate contact open The closing of the contacts corresponds to a "marking" position while

  <Desc / Clms Page number 84>

 that their aperture represents a final "gap" position the right or left shift of the five individual code bars 106 to 110 corresponds.



  ] the representation in the sets of contacts of a five-element signal of the Baudot type or the like. With respect to the sixth coding bar 111, or universal bar all the notches on its upper surface are inclined in a direction which tends to move the universal bar to the right, each time a key 124 is depressed, to against the action of the spring 122 The universal bar is the only one, among the coding bars, which is positively biased, by an elastic action, in an inactive position.

   The right end of each coding bar has on its upper edge a notch 126 of square shape intended to cooperate with the upper edge of the vent windows of the right flange, which constitutes a longitudinal stop limiting the movement of the coding bars. coding
An oblique notch 127 is formed at the center of the lower edge of the bar. of coding 106 to 111. These notches 127 are used in combination with the spacer mechanism (described later) and their inclination is such as to determine the placement of the coding bars 106 to 110 in the spaced position. and move the universal bar 111 to the right.

   The lower left edge of coding bars 106 to 110 has two notches! 128 and 129 which conntituent a means of locking the bars during the transmission of a signal. In accordance with the conventional construction of the code bar keyboard, when the five code bars are moved by depressing one key, no other key can be actuated. Therefore, if the coding bars are locked after pressing a key, no further

  <Desc / Clms Page number 85>

 button cannot be lowered until the coding bars are unlocked. Such a characteristic: will be the subject of later developments, with regard to the locking wedge or blade device.

   Each key lever is combined with a return spring 130 which returns the key levers to their initial position, out of contact with the coding bars, when the operator ceases to act on the key.



   The universal bar 111 does not have notches such as the locking notches 128 and 129 of the coding bars. However in the vicinity of the left end of the rear face of the universal bar 111 a relatively heavy locking block 132 (Fig. 16) is riveted in a position such that its lower surface is parallel to the lower edge of the bar. universal bar and below it. Immediately to the left of the locking block 132 is attached a pin 133 which passes through the universal bar and so supports
 EMI85.1
 oscillating an anti-repetition lever 134, forming a lock The lock 134 has an L-shape and comprises an arm 135 disposed downwards, in the vicinity of the left edge of the block 132.

   When in the active position the end 136 of the arm 135 extends a short distance below the lower edge of the block 132, as shown in Figs. 16 to 18.



  The upper arm 137 of the lever 134 extends horizontally over the surface of the. block 132 and is biased counterclockwise (Figs. 16 to 18), so that its arm disposed downward is applied to the left edge of bloo 132, by a resoort 138 provided in a cavity 139 formed on the upper edge of the block 132.



   Pivotally mounted on the left-hand support bracket 112 aat provided with a bar locking wedge device 141

  <Desc / Clms Page number 86>

 coding, comprising a side arm 142 in the form of a U and a set of arms 143 arranged downwards (Fig.19). A vertical wedge blade 144 is riveted into the opening of the U-arm 142. The lower edge of the locking blade 144 includes a downwardly directed tab 145 which serves as a retainer. for a spring, conjugated with the locking wedge, the other end of which is placed on a suitable finger 147 fixed on the base plate 101.

   The spring 146 biases the locking wedge device clockwise (Fig. 19). so that the blade 144 is biased towards the code bars 106 to 111. As shown in Fig. 19 the upper left edge 148 of the bar 144 is slightly recessed from the middle edge.
149 of the blade The recessed portion 148 rests on the lower edge of the block 132 while the middle portion
149 contacts the lower edges of code bars 106 to 110. When a key 124 is depressed and the code bars are correspondingly moved left or right in a predetermined fashion one of the notches 128 or 129 from code bars 106 to
110 is immediately above the portion -

  medians 149 of the blade 144. However, the locking wedge device 141 does not move into its active locking position under the action of the spring 146 as long as the universal bar is not completely shifted to the right (Fig. 17) so as to remove the block 132 from the position it occupies above the recessed portion 148 of the blade 144.

   This combination between the displacement of the coding bars 106 to 110 and the displacement of the universal bar 111, of sufficient amplitude to allow the actuation of the locking wedge device, is predetermined so that the bars

  <Desc / Clms Page number 87>

 codes 106 to 110 can come exactly in position just before the end of the movement of the universal bar which allows the locking wedge to pivot under the action of the spring 146 and has the middle portion 149 of the blade 144 in the notches 128 or 129 of the five. code bars 106 to 110.

   This movement of the wedge locking device acts to prevent further movement of the six code bars 106 to 111.
As shown in Fig. 14 a support 151, fixed to the base plate 101, carries a group of two solenoids E701. On the arms 143 directed downwards of the locking wedge device 141 is fixed a magnetic frame 152 arranged immediately forward of the pole faces of group E701, a suitable air gap being maintained between the armature 102 and the solenoid pole faces. As it is evident, the excitation of the group of solenoids E701 causes the displacement of the device 141 with wedge locking, against the action of the spring 146,

   removing the blade 144 from the coding bar enooohes 128 and 129 and from its position behind the block 132 of the universal bar 111 and allowing the universal bar to be biased by the spring 122 in its position. The coding bars 106 to 110 undergo a slight displacement, when they have been brought to the right by the action of a key, due to the elasticity inherent in the contacts, as will be described later.



   When the coding bars begin to move under the effect of the lowering of a key 124, the universal bar 111 by moving into its right position, has an action such that the lateral edge of the arm
 EMI87.1
 135 directed towards the bottom of the latch 134 an.tJ.-repeat1 tio'O.. comes into contact with the edge of blade 144 of blocking. As shown in Fig. 17, a complete displacement of the bar

  <Desc / Clms Page number 88>

 Universal under the effect of the lowering of a key 124 rotates the lever 134 against the action of the spring 138.

   If the key 124 is kept in the lowered position, the universal bar cannot return to its left position when the excitation of the solenoid E701 causes the cancellation of the locking wedge device 141 However, the actuation of the solenoid caused the withdrawal of the blade 144 out of its locked position in code bar notches 128, 129. This action also moves the recessed portion 148 out of its position behind block 132 to a position below the end 136 of the arm 135 of the lock; which allows the lever 134 to return its arm 135 in contact with the edge of the block 132, under the action of the spring 138 (Fig.18).

   Such action brings the end 136 of the arm 135 of the locking lever immediately above the withdrawal portion 148 of the locking blade. Therefore, when the solenoid group E701 is disassembled so as to allow the wedge locking device to tilt under the action of the spring 146, the locking wedge device is prevented from shifting. return to the coding bar locking position by contenting the recessed portion 148 with the end 136 of the arm 135 of the lock.



  When using the upward movement of the locking blade 144, in a manner which will be described, to close a set of switch contacts which, through the previously described transmission control circuit, initiates the switch. 'emission of a signal resulting from the combination established by the coding bars 106 to 110, it can be seen that the anti-repetition arrangement which has just been described can prevent the repetition of the transmission of a character whose key is kept lowered, as the locking wedge device is prevented from lifting

  <Desc / Clms Page number 89>

 to close the operation start contacts intended to trigger a transmission operation
A space bar 153 (Figs.

   14 and 15) is fixed to two vertical guides 154 arranged in holes formed in the front edge of the front keyboard guide strip 155 and also passing through holes made in a support 156. Springs 157 disposed between the support 156 and washers fixed on the guides 154 urge the spacer bar 153 towards its inaobive raised position. The lower end of the guides 154 supports a transverse rod 159, the right end of which is arranged so as to constitute a contact actuator member,.

   as will be described Behind the spacer bar device and fixed to the base plate 101 are provided two brackets 160 and 161 providing a support for a comb 162 for guiding coding bars, arranged vertically and guiding vertically. a space key bar 163 * The key bar 163 comprises an upper lateral portion 164 arranged below the six coding bars 106 to 111 with a view to cooperation with the notches 127 arranged in the middle position on the lower edge of the bars,

   which has already been discussed. In the vicinity of its lower end, the space key bar 163 has a notch on one of its sides so as to form a recess 165 intended to receive one end of a lever. 'spacer 166 which is pivotally mounted between the two brackets 160 and 161 and the opposite end of which is disposed under the spacer bar rod 159. A spring 167 is attached in the vicinity of the front end of the spacer lever 166 and urges the lever 166 in a position of contact with the lower edge of the rod 159 of the space bar,

   Lowering the space bar 153 causes

  <Desc / Clms Page number 90>

   through the rod 159 the tilting of the spacer lever 166 against the action of the spring 187 and moves the spacer bar 163 upwards until contact with the inclined edges of the notches 127 code bars, thereby arranging the code bars in the relative position representing a spacing signal.

   Clearing the space bar allows the spring 167 to return the lever 166 to the inactive position and the latter lowers the bar 163 and moves it away from its position of cooperation with the notches 127 of the coding bars, allowing the universal bar 111 to return to its left position.



   Attached to the base plate 101, below the straight ends of the coding bars 106 to 110, is a switch block 169 containing five sets of contact switches, which are normally automatically biased into position. open irea upper blades of the contact switches protrude below the mating ends 121 forming actuators of the coding bar contact levers 116 and each upper blade comprises a wear part 171 cooperating with the active end 121 of the contact lever.

   The code bar 110 is combined with the switch S702, the bar 109 with the switch S703, the bar 108 with the switch S704, the bar 107 with the switch S705, and the bar 106 with the switch S706. The movement to the right of a coding bar 106 to 110 causes the conjugate contact actuation lever to swing clockwise (Fig. 14) by moving its active end 121 up to the contact. with the wear part 171 of the switch blade combined so as to move the upper switch blade and its contact in contact with the lower blade and its contact,

  <Desc / Clms Page number 91>

 thus closing the conjugate switch.

   The inherent elasticity of the contact blade of the top switch is sufficient to open the contact when a down key is released and the coding bars are released to allow movement of the coding bar to the left. The desired movement to the left of a coding bar by lowering a key directly removes the contact of the active end 121 of the contact actuating lever 116 with the wearing part 171 of the conjugate contact. to allow. the switch to open quickly when such a situation corresponds to the pre-established combination of coding bars.

   The upper blades of switches S702 to S706 are connected to a common slum line as the lower blades are connected to individual conductors terminating in a keypad socket J701 which is adapted to be connected with the control circuit.



   At the left end of the keypad 50 (Fig. 14) is provided a universal bar switch S701 which is mounted on a closure 172 fixed to the base plate 101 The switch S701 has two contacts which are normally in the open position . A contact comprises a wear part 173 disposed above a lateral extension 174 of the locking blade 144.

   When the locking wedge device moves into the locked position, in the notches 128 and 129 of the code bars, such upward movement brings the lateral blade extension 174 into contact with the wear part 173 of the blade. universal switch and causes the switch contacts to close (Pig.17). As previously stated the anti-repeat device prevents upward movement of the blocking device (Fig. 18) when a key is held down after a signal. was t @ essmis

  <Desc / Clms Page number 92>

 and that the E701 group of adenoids.

   has been operated and uncoupled and the universal contact S701 is prevented from coming to the closed position, which prevents the initiation of a transmission operation. The conductors coming from two contacts of the switch S701 are connected to the socket J701.



   To allow repeated transmission of spacing signals by pulling down from the spacing bar 153 a spacing bar switch S707 is mounted on a bracket 176 adjacent the protruding end of the spacer bar 159. 'Spacing The S707 switch has three sets of contacts, one of which is normally closed, while the other two are open.

   These switch sets are described in the part of the description concerning the control system.
Switch S707 has an actuator arm wear part, disposed immediately below the active end of rod 159 and when the spacer bar is lowered the active end of rod 159 contacts with wear part 177 and opens the normally closed contacts and closes the normally open contacts of switch S707.

   This switch is plugged into the control circuit to trigger the transmission mechanism and repeatedly emit spacing signals, depending on the switch positions of code bars S702 to S706, until 1% bar spacer 153 is released to allow the contact sets of switch S707 to return to their normal position. The conductors coming from the various contacts of switch S707 are also connected to socket J701.



   At each end of the front keyboard guide strip 155 are provided two blocks 179 and 180 in

  <Desc / Clms Page number 93>

   "HJCITE", or similar material, data which is formed on their lower surface a blind hole 182. The two blocks in "Lucite" 179 and 180 are covered with an opaque material, except for a small circular portion 181 in Correspondence with the blind hole 182. Lamp sockets 183 are attached to the keyboard guide strip immediately below the blind hole in blocks 179 and 180. Left block 179 surrounds a lamp 1701 which is disposed in its socket 183 while a similar lamp I702 is located inside the right block 180 and is engaged in its socket 183.

   Lamp 1701 in the left socket is used to optically indicate to the operator that the magnetic recording tape is approaching its end, with an appropriate mark being written on the opaque surface of the "lucite" block 179. D Similarly, the I702 lamp signals the operator that the line or page being printed is approaching its end and an appropriate notice is inscribed on the surface of the "Lucite" block 180. Lucite "With the blind hole 182, a diffuse glow appears through the circle 181 at the top face of the blocks.

   This is an adequate mode of light signaling in an airplane where direct radiation is undesirable.
The conductors for the lamps 1701 and 1702 are plugged into the socket J701 to be connected to the control circuit. On each side of the keypad keypad lighting devices 1-703 are mounted on the left and right of the flanges 102 and 103, these devices being connected to a conductor connected to the socket J701.



   Appropriate brackets 186 and studs 187 are provided on the frame supporting the keypad to allow the placement of means for fixing a keypad cover.

  <Desc / Clms Page number 94>

 protection indicated schematically by lines 188.



   The keypad which has just been described, constitutes a block comprising coding bars with horizontal displacement and each combined with a particular contact switch. to establish according to the Baudot code, a combination representing simultaneously a marking signal and a spacing signal. Mechanical control of coding bars 106 to 111 is obtained by lowering any one of the 26 keys corresponding to the letters of the alphabet, the space bar or carriage return, the number. line change key or a blank key that can be used for call waiting, if desired, by adding a special switch (not shown).

   The simultaneous appearance of the coded signal contacts is established before the actuation of a universal busbar switch intended to trigger the start of a transmission operation. This slight delay is provided to ensure that the control system has the possibility of absorb the five signals established by the coding bars 106 to 110 before the start of a transmit operation All coding bars are held in a position where the combination is blocked, depending on which key has been lowered, until on completion of the transmission operation, a signal then being transmitted by the control system to the group E701 of unlocking adenoids,

   which moves the locking wedge device 141 out of its locked position and allows the next key to be depressed to determine a new group of signals on the coding bar contacts, to allow repetition of the operation spacer A switch S707 is provided under the spacer bar mechanism and is actuated after the coding bars oontaots

  <Desc / Clms Page number 95>

 have been set, which allows for the slight delay required for the transmit operation.

   As the switch S707 acts on a circuit of the control system bypassing the switch S701 the anti-repeat action, acting through the blocking action device 141 and the switch S701 is made inactive and the signal spacing repeats as long as the spacing bar is lowered Optical indications are provided to the operator to signal the reception capability of the recording magnetic tape and also to warn of the proximity of the end of the recording tape. a line or a print page.

   Normally the end of line light signal appears when there is more than about six characters left, ie approximately the location corresponding to the 66th space available for characters on a page.



   Printing device.



   With reference to Figs. 20 and 21, the printing apparatus 52 comprises a support frame forming part of a base plate 201 on which are rigidly fixed, parallel to one another, a left support flange 203, a right support flange 204 and a flange 205 supporting a cable drum. Between the left flange 203 and the flange 205 supporting the drum, in the vicinity of the rear part of the base plate 201 are provided a plate 206 supporting a motor, a bracket-207 serving to mount the motor, a flange-support 208 located on the left, for the operating shaft and a support flange 209 also located on the right for the operating shaft, all of these elements being arranged vertically parallel to the flanges 203, 204 and 205.

   All these flanges are fixed

  <Desc / Clms Page number 96>

 to the base plate 201 by means of screws 202, and press-fit locating pins (not shown).



   At the front of the printing mechanism 52 (Fig. 20), a shaft 212 for positioning and mounting a character wheel passes through bearings fixed in the flanges 203 and 204 and is journaled in the latter Two collars 213 and mating washers 214 are attached to the right end of shaft 212, one collar being located on either side of the right flange 204- by means of screws intended to maintain the axial position of the shaft 212 supporting the character wheel. Although only one fixing screw can be used,

   it is preferable to provide two screws angularly offset with respect to each other with respect to all the elements described which are fixed by means of screws The intermediate part of the shaft 212 has a square cross section and its ends are cylindrical. Instead of a square section, splines or other keying elements can be provided.

   To the right of the cylindrical portion of the shaft 212 between the right flange and the middle square portion of the shaft is provided a locking cam device 215 which includes a hub 216 fixed to rotate with the shaft. tree 212, by means of via. and carrying four cams 218, 219, 220 and 221 As seen in Fig. 24, the hub 216 of the. cam device 215 comprises end portions of diameter re @@ it and two external grooves 223 in axial direction pretending over the length of the hub Three cams 218, 219, 221 have a central opening and lugs 224 arranged radially towards the hub. 'interior,

   allowing the cams to be placed at the ends of the hub 216 with their lugs 224 engaged in the axial grooves 223. A cam 218 is arranged to the right of the hub 216 and the cams 219 and 221 separated by

  <Desc / Clms Page number 97>

 a spacer 225 made of an anti-friction material are placed on the other side of the hub 216., The cam 220 is rotatably mounted on the spacer 225 between the cams 219 and 221 After mounting a cam on the hub 216 the ends of the hub are forced into contact with the cams 218 and 221 so as to secure all the cams, the spacer and the hub and to make them an independent assembly 0 The shapes,

  the characteristic relative position of the locking elements and the role specific to each of the different cams will be explained below. 0 Cam 218 is used to block the printing hammer, cam 219 is a carriage return cam, cam 220 is a carriage return and line change box, and cam 221 is a line change cam Cam 221 may or may not be used depending on the type of the line change system.



   In the immediate vicinity of the sensing cam device 215 and also rigidly fixed to the right-hand portion of the shaft 212 supporting the character wheel is a spur gear 226 comprising a hub member 227 with a silent gear (in laminated plastic). rigidly fixed by means of rivets on the latter, the toothed wheel 228 is exactly centered with respect to the hub 227 not. only by rivets but also by dowels.



   A device 230 capable of sliding axially and comprising the character-carrying wheel is mounted on the square intermediate portion of the shaft 212 and is integral in rotation with the latter. The character-carrying wheel device comprises a hub. 231 provided with a collar and one of the ends of which forms a shoulder 232 of reduced diameter. The opposite end of the hub 231 includes a shallow annular stop 234 and

  <Desc / Clms Page number 98>

 supports a bearing 235, the internal ring of which is applied to the frame 234. * The edge of the hub 231 is threaded over the internal race of the bearing 235 so as to secure the last

  with the hub A character wheel 237 comprising the 26 letters of the alphabet plus six white spaces, formed on the periphery at equal angular intervals, has a radial flange 238 in which is formed a central opening 239 of relatively large diameter , intended to fit on the hub 231, the flange 238 pressing against the hub and the opening 239 being engaged on the annular shoulder 232. the wheel 237 is retained and fixed on the hub 231 by a retaining ring '240, the opening of which is adapted to fit over the central part of the. hub and cover the internal flange 238 of the character wheel 237 which is fixed to the hub flange by means of screws 241.



  A split collar 243 composed of two identical pieces 244, is clamped on the periphery of the bearing 235 by means of upper and lower bolts and nuts. The lower branches 245, of each clamping piece 244, which are protruding and comprise side grooves facing each other, cooperate so as to firmly fix a movable cable 250 (which will be described later), in the grooves 246. By loosening the lower bolts of the clamp the character wheel device 230 can be adjusted in position relative to the cable 250 and along the shaft 212.



   On the left cylindrical portion of the shaft 212, between the intermediate square portion and the left flange 203 is provided a device 252 with a stop wheel comprising two roohet wheels with sixteen teeth whose fingers are turned in opposite directions, fixed ooaxially side by side, so as to be integral in rotation. The

  <Desc / Clms Page number 99>

 stop wheel device 252 may be a wheel made in one piece or according to a construction preferable in terms of machining, it can be made in two pieces. A piece has a hub 253 with which a wheel is integral 16-tooth lock 254, the right part of the hub forming a collar provided with tightening screws intended to fix the device 252 on the shaft 212.

   A second toothed wheel 255 whose teeth are turned in the opposite direction to those of the wheel 254 is arranged on the left portion of the hub 253 and rigidly fixed to the ratchet wheel 254 by means of rivets 256.



   With reference to Figs 21, 23 and 33, two pawls 258 and 259 with a double leading edge are arranged on the internal face of the left flange 203, at a certain angular distance from the device 252 with the stop wheel, the pawl 258 placed on the left side. above is referred to as a "spacer pawl" while the lower pawl 259 is referred to as a "marking pawl". Axles 260 provided for the articulation of the pawls 258 and 259 pass through the flange 203 and are rigidly fixed to the latter by means of eorous 261.

   Each pawl 258,259 has a ridge, or leading edge, 262 and 263 respectively, intended to engage the teeth of the casing wheel 254 so as to prevent rotation. The second ridge, 264 or 265 pawls 258 and 259, respectively, is in a position of cooperation with the teeth of wheel 255. The two pawls 258 and 259 are biased clockwise (Fig. 23 and 33), around their axis 260 by means of springs 266 fixed on fingers 267 integral with the flange 203. The co-operating ridges 264 and 265, resiliently biased in the clockwise direction, slide over the teeth of the mating wheel 265.

   Insofar as the

  <Desc / Clms Page number 100>

 rotation of the stop wheel shaft (Fig. 23) is counterclockwise, the teeth of the wheel 255 rotate the two oliquets 258 and 259 against the action of the springs. as the ridges rise on the teeth of the mating wheel 255, the stop ridges of the clicks 262 and 263 are disposed directly on the face of a tooth of the ratchet wheel 254.

   The pawl 259 is in such a position in Fig. 33. When the ridge falls from one tooth into the next hollow of wheel 255 the pawl spring rotates the stopper pawl so as to withdraw its edge from the face of a tooth of ratchet wheel 254. the two clicks 258 and 259 are angularly arranged with respect to the stop wheel device that the placing in the stop position of the edge 262 of the pawl 258 in contact with the front face of a tooth at click-wheel ratchet. The stage stops the rotation of the shaft 212 in a position where the edge 263 of the pawl 259 is midway between two adjacent teeth of the ratchet wheel 254 This relative position can be seen in FIG.

  33. Thus by using two pawls and a ratchet wheel 254 with sixteen teeth 32 distinct stopping positions of the shaft 212 can be obtained. The importance of placing the stop pawls in the cooperative position will become apparent below.



   As can be seen clearly from Fig. 21, both pawls 258 and 259 have the same U-shape, the open end of the U being adjacent to the pawl lever which contains the ridge 264 or 265 . Rigidly fixed, for example by brazing or by spot welding transversely to this end of each pawl 258 and 259 is provided a solenoid frame or plate, 269 and 270 respectively.



   The solenoid fittings 272 and 273 are

  <Desc / Clms Page number 101>

 fixed by screws to the left flange 203 in the immediate vicinity of the corresponding plates 269 and 270. A spacer adenoid 801 is fixed to the fitting 272 and its core is in correspondence with the frame 269, on the path of displacement of the latter and at a slight distance from this frame; when it is energized, it maintains the pawl 258 in its position corresponding to a rotation counterclockwise, its stop edge 262 being in position in contact with the ratchet wheel 254, so as to engage the nearest tooth and. stop the rotation of the shaft 212 supporting the character wheel.

   Marking solenoid E802 is attached to bracket 273 in the same relative position with respect to armature 270 and when energized maintains pawl 259 in the position corresponding to a counterclockwise rotation. a watch, its edge 263 being in contact with the periphery of the stop wheel 254, so as to come into engagement with the tooth appearing first and to stop the shaft 212 in a position between two positions in the- which the pawl 258 would stop the rotation of the character wheel.

     The pawls 258 and 259 are brought by pivoting into a stop position for each of the sixteen teeth of the stop wheel 254, by the conjugate wheel 255 This action places the respective reinforcements 270 in the immediate vicinity of the solnoids E801 and E802. If at any time either of the solenoids is energized the armature and pawl are positively brought into contact with the solenoid and all of the solenoid force is used to hold the pawl against the action of its spring. In other tannes the solenoids do not have to. create a high magnetic flux over a large air gap to switch the clicks,

   they maintain

  <Desc / Clms Page number 102>

 simply the pawls after they have been positively brought to a stop position.



   As will be explained in the part of the present description devoted to the operation whenever a character is chosen to be printed on sale. marking noide and the spacer solenoid are actuated and the elementary angular displacement of the character wheel, when actuation of the solenoid takes place is determined by a pre-selector signal created by manifolds mounted on one and on the other end of the printing mechanism, as will be described now
An S801 spacer manifold is attached to the left side of the printing mechanism, and an S802 marking manifold is attached to the right side of the mechanism.



  Each manifold consists of a dielectric horizontal plate 282 having a central opening at 283 and mounting holes 284 formed in its corners, as seen in Figs. 25 and 26. The dielectric plates 282 are identical in the marking collector and in the spacer collector. As shown in Figs. 20, 21 and 24, the left manifold plate 282 is so arranged that its central opening 283 engages the left end of the shaft 212 and is secured at each corner of the left flank 203. by means of via 285 passing through spacers 286.



   On 1, right side of the printing mechanism 52 a bracket 287 for mounting the collector plate is screwed to the upper edge of the right flange 204 The plate 282 of the right collector is fixed through holes 284 at its upper angles, to . the crack 287, by means of bolts and nut 288 and is separated from the hinge by spacers 289., The lower angles are fixed to the flank 204 in a manner analogous to

  <Desc / Clms Page number 103>

   that described for the left collector plate 282
With further reference to Figs.

   25 and 26 each collector tray 282 is preferably laminated with fiberglass and melamine resin with a melamine paper surface. On the collector side, the tray 282 (Fig. 25) has a circuit obtained by applying a non-protruding coating A suitable circuit of this kind may include a backing formed of 0.0375 mm nickel with a rhodium surface coating of 0.0005 mm to 0.001 mm, the surface of the plate and circuit being subjected to treatment finishing by polishing.

     The rear surface of the plate 282 is provided with a segment obtained by a surface application forming a connection circuit, which can either be flush with the surface or be formed in relief; the circuits on the rear face comprise conductors going to the terminals. A, B, C, D, E, F 'G, H, for' the spacer and terminal manifold plate; ', B', C ', D', E ', F', G ', H ', for the marking collector plate.

   The circuits on the front and on the back of each plate are interconnected through the plate by means of rivets 290 The circuits of collectors obtained by surface addition are arranged in two concentric and discontinuous annular bands, the internal ring being divided into four segments of 90, 292, 293, 294 and 295 which, through the printed circuits of the rear face are connected respectively to the terminals C, D, F, G.

   The outer ring of manifold segments shown in Fig. 25 had 12 segments, arranged on the surface of the platen and interconnected by means of rivets and connecting circuits at the front and rear, such that it has four circuits 296, 297, 298, 299, which, by their interconnections correspond to H, A, B, E, respectively.

  <Desc / Clms Page number 104>

 printouts 296 and 299 consistent;

     in two surfaces of large diametrically opposed dimensions, arranged on either side of the opening of the collector plate, whereby at least a portion of each circuit 296 and 299 angularly covers a portion of each of the four circuits 292, 293 , 294, 295 corresponding to the internal segments and diposés facelift with respect to such a portion.

   Similarly, it should be noted that each of circuits 297 and 298 has four segments, the segments of each circuit being scraped to the level of internal circuits 292, 293, 294 and 295, respectively, and at a certain distance from these The arrangement of the two ring sets of segments? of circuits as seen in Fig. 25 is such that a doubly interconnected collector brush undergoing a 360 rotation of dwarfism to come into contact with the two inner and outer rows of segments, will be applied successively on the internal segments 292 to 295 and during each movement of 90 when an arm of the broom is in contact with one of the internal segments;

   The second arm of the broom will come into contact with each of the four outer segments. Another 90 movement of the commutator brush, reproduced in order, reversed the same operation, thus achieving: thus 16 distinct combinations of bridged circuits for a set of 8 commutator terminals
Each end of the character wheel shaft 212 protrudes a short distance beyond the manifold plates 282. Attached to the left end of the shaft 212 is a rotor device 302 and at the rear. - right end of the shaft 212 is provided another rotor device 303.

   The rotor devices 302 and 303 are identical and complementary so that the elements constituting the two rotor devices will be designated

  <Desc / Clms Page number 105>

 by the same references. Each rotor consists of a hub 304 fitting onto the shaft supporting the character wheel, keyed onto the latter by means of screws, of an element 305 for isolating the rotor fixed so as to be integral in rotation of the shaft 304 by means of a strong glue, resistant to temperature and humidity, and an arm 306 forming a brush, preferably of hardened and elastic phosphor bronze. The rotor arm 306 is provided with two arms 307 and 308 forming a brush and arranged radially at a certain distance from one another;

    the brushes 307 and 308 are slightly curved in a direction which away them from the insulator 305 and their ends 309 and 210 are also folded in the same direction and are notched so as to form a number of narrow elastic tabs forming a wiper.



   With reference to Figs. 20 and 24, it can be seen that a rotor device 302 turns, during operation, in solidarity with the shaft which carries the character wheel and the wiper 309 will be elastically pressed into contact with the internal row of circuit segments. of the collector plate while the outer trotter 310 will be resiliently pressed so as to follow a path corresponding to the outer row of circuit segments on the collector plate.

     Thus, as can be seen in Fig. 25, there are sixteen angular positions of the rotor device relative to the collector plate 282 whereby the rotor arm with the wipers 309 ′ and 310 make a bridge connection between sixteen different combinations of internal and external manifold segments, taken in pairs. By the control circuit, as will be described, the left spacer manifold S801, will control the angular position for which the spacer solenoid E801 holds the spacer pawl 258 so that the latter is in position.

  <Desc / Clms Page number 106>

 
 EMI106.1
 taken with the wheel d 1-.1l01il} -o.lek!.; o 2cl and stops the rotation of the shaft 212.

   The right marking manifold 3302 ;, which is in relation, via the control circuit, with the marking solenoid: r02 maintains the marking pawl 259 in a position where it is in engagement with the wheel of axxûû 254 and stops the shaft 212 in ten positions including the stop positions corresponding to the pawl .'vopL: c:; x: 2i ± 50. The connection of the collars, of the spur gear device dLte = .: s: x: ic: a of the spur gear and of the dTurrët wheel device with the darting part of the shaft 212 is made in preference to the lliCYf; l1 of two fixing screws, offset ::; : = l ::.: - ¯ :: '1. ":;"'? ú ':;, sei-rees on flats formed because leb I:' (').', i (1! .1: > c-ylindriques of the shaft 212g so as to ensure.'UT3 i..i :: 1C one direct and precise radial position of these él'2ill; ni; - relative to the square portion of the shaft.



  The dif1! "'O:' i -I; i: f B .. 1 :: -i: i; a ::" Jl: t'J11! .IJ:! .. m. ('A .: II co,,';';:: <; '1f] which ai.vo-3 S7-4 parallel to shaft 212, swirling at its f-: a. =:> Uit- :: in bearings arranged on the flanges g% .. nphc 20, 'and right 204. in the vicinity of their anjleo izft = i. '1 .i.'l. , ', The intermediate portion of the shaft 314 èi'. > -i-: 1: -. #> c: - "'m: s: cticjj2 square transverse including lr-r. ... - :: ¯ com'? h -. '. r :. .na. An elastic ring of: r: 1.> t) 1: t. ;;, ';.; attached to an-i end of shaft 314 on face e; .-, é;: c ,: - ..; ';' = 1. Flange ± 04 t arranged in combination with a] li0 '3u-r the internal face of the flange 204 and fjro at the - ..;, - b. == azrr = n of vils, and maintains ia po :: r¯t, iel1; -, - :: 1: '10 "" ,,) .. 1,) to the printing hammer shaft.



  A levi-3- 316 '1') ...-? <# :: ir>. "I'iIi.8ltr t o including an arm 317 di ..; '0 ::;': r ..: ',,: 1,"' ''.: t and a lower arm 318,

  <Desc / Clms Page number 107>

 is bent in the shape of a U in its middle portion so as to produce two branches in which they are formed square holes intended for the sliding mounting of the lever on the square portion of the shaft 314 of the printing hammer. the lower arm 318 is integral with the U-shaped portion of the lever 316 and in the corresponding position comprises a half-perforation, which produces a boss 319, and a hole 320.

   A small plate 321 provided with a threaded opening in correspondence with the hole 320 of the lower arm 318 and having a grooved upper edge cooperating with the boss 319, is bolted to the lower arm 318 and in alignment with the latter. The hammer lever 316 has a position such on the shaft 314 that the upper arm is exactly in line with the characters of the periphery of the character wheel and in this position the lower arm 318 and the plate 321 act as a portion of the cable. 250 remote e the tightened portion by the collet 243 of the character wheel.

   The upper end of the upper arm 317 has an opening which fits into a slot 323 formed in the body of a printing hammer head of a material softer than the characters. The hammer head 324 is bolted to it. the end of the upper arm 317, its striking surface being substantially parallel to a radial plane passing through the axis of the shaft 314 and the face of the hammer head. In fact the hammer face 225 is disposed so as to strike at a right angle the surface of a raised character formed on the periphery of the character wheel, when the printing hammer shaft 314 osoils so as to move the hammer head 324 in contact with the bearing wheel. characters 237.



   On the right cylindrical portion of the printing hammer shaft 314 between the intermediate portion

  <Desc / Clms Page number 108>

 
 EMI108.1
 square and the right flange 204, a levj, = :: feeler- 327 for locking the printing hammer is tightened energetically., i2emēj-¯. at
 EMI108.2
 means of a via 329 by its intermediate portion 328 split 8?
 EMI108.3
 U-shaped.

   A rib of the middle part 328 en :: n'm8 i L '', includes an arm. 330 arranged upwards in an arm 331 located at the rear and turned downwards, the '..ras: upper extended folded Iatéral8nier.b at its end and comprising a tab 332 extending towards the rear of which 2nd: path traveled. lies directly on the r, ax; au.5 of rotation
 EMI108.4
 a hammer locking cam 218 forming part of the
 EMI108.5
 device you cycles of waxing,. 'ïWz t: éri: lower part of the leg 331' roQroc towards the a :: "èxe Q0rnd -tir finger 33; protruding ls.t,: ra.î.c: w..2t eng.d., , 4> l? Iis 1 * end in the form of iOU1 "':. E dsnn print lever 335 a L' :: JJI,: '1ï: r..6: 1té 334 does" t.i3 rr / ei ; an arm 336 d: u: 18 ve: ï:. 'S the front rU lever of-.,, .f,:; I3io11 335: .J' .. L1 is bent in the shape of Ü with arm dï: .po.:,:

   da part and very ex fia: that 205 supporting the drum I c:! hle and which is t ,,,, 0: t ... t6 su:,: - a. & .:> :; 3,337 t:; C8.vaT- sant this fiasse 205. The i.,.: S before 336 of lever 335 is. arranged on one side of the aéuiane part in the form # iïtr while an arm 338 directed towards the rear and-% tl '(: ù.'J'3 dl opposite side of the median portion and is'- 'nQ back to the side until di- sidewalking Ó 1.uit ::' '1'.ue 205 s \ .Í.p: p \)' k1.11t the cable and is terminated forming a% 3 print cam 339 rounded and directed upwards: The Qoút: çe-CIi / ll8 339 is applied to the periphery of the print altrae
 EMI108.6
 in the rotary operating system which will be described in
 EMI108.7
 the following .

   The front lever 336 is so?.?. I.:.- ga a spring 340 fixed on a finger 341 aoli3: ire of the base plate
 EMI108.8
 201 so that the follower 339 is constantly
 EMI108.9
 biased in contact with the. cam d imp. = zsioa this yes allows the lever 335 of the ring d t iUl1l'es.Jion to be resiliently biased in the opposite sems to that of the

  <Desc / Clms Page number 109>

 needles of a show the cooperation of the end 334 in the form of a fork with the finger 333 causing by the intermediary of the feeler locking lever 327, the rotation of the shaft 314 of the printing hammer, and the subsequent attack by the hammer face325 of the sheet of paper facing the character wheel,

   unless the latter is blocked by the action of the locking feeler lever 327 cooperating with the print locking cam 218.



   With reference to Fig. 37, it will be noted that the printing hammer locking cam 218 comprises 6 radial projections 244 arranged angularly so that they coincide with the blanks of the wheel 237. When the character wheel is stopped, a blank is located opposite the face 325 of the hammer and one of the projections 344 of the cam 218 for locking the printing hammer is on the path of the rear finger 332 of the feeler lever. blocking (Fig. 28) and the cam projection 344 limits the angular movement of the printing hammer shaft 314 under the action of the spring 340, so that the hammer head cannot move a distance sufficient for the hammer face 325 to strike at the front of the character wheel.



     Mechanism of the operation shaft.



   With reference to Figs. 20 to 23 and Fig. 28, the energy for controlling printing operations, adjusting the angular and axial position of the character wheel, changing line, returning the wheel character carrier operation also called "carriage return", comes from a B801 induction motor, three-phase, controlled by an alternating current source of 115 volts at 400 periods. The B801 engine is combined with a set

  <Desc / Clms Page number 110>

 reduction gears, its shaft 350 projecting at one of its ends which is fixed by means of via 352 to a support bracket 208, the shaft 350 passing through a central opening of this bracket.

   A reotined pinion gear 353 is attached by means of screws to the end of the shaft 350 of the motor. The right end of the B801 engine (Fig ..



  20 and 23) is arranged in a semi-circular cutout of the flange 206 and held on the latter by means of a clamping piece 354 which partially surrounds the motor housing and is fixed to the flange 206 by means of screws 355
Arranged vertically above the axis of the engine and pivoting in a bearing 356 of the flange 208 supporting the left part of the operating shaft is provided a shaft 357 on which is fixed at one of its ends a pinion 358 Spur toothed, silent, plastic laminate, and meshing with motor driven pinion 353. Pinion hub 358 is secured to shaft 357 by means of screws.

   At the other end of the shaft 357 is provided a straight toothed pinion 360 of hardened steel, fixed by screws and constituting the driving element of a positive-action clutch device 361. The driven element 362 of the clutch 361 is fixed via via to one end of an operating shaft 363 which journals in growls, which lie in line with the shaft 357, in the right fiasco 209 and in the flange 205 supporting the bearing of the cable drum. the operating shaft 363 is unwelcome, in the axial position thanks to the contact of a collar 365, forming a body with the shaft,

     with the internal ring of the bearing on the other side of the flange 205 supporting the cable drum and by a collar 366 fixed to the operating shaft 363 near the internal face of the flange 205 of the cable drum, for example screws .

  <Desc / Clms Page number 111>

 



   The collar 366 includes a tray 368 which serves a dual purpose. The periphery of the. chainring 368 has a single cam boss 369 (Fig. 28) which cooperates with a line change follower 370, as will be described below and also serves as a fixed chainring for a friction clutch 371 having a toothed wheel floating 372 rotating freely on the operating shaft 363 and pressed by two friction discs 373 between the fixed plate 368 and an axially movable plate 374 which is slidably keyed on a collar 375 fixed to the operating shaft 363 by means of by means of a compression spring 376 is arranged between the collar 375 and the plate 374,

   urging the latter towards the fixed plate 368 and thus pressing the friction disc 373 in contact with the floating toothed wheel 372. The pl @ @ eu 374 also serves as a cam detecting the stopping of the operating stop, this cam acting on the contacts of a switch 377 fixed on the rear edge of the flange 209 supporting the right part of the shaft. operation, by means of screws.

   Switch device 377 is a double switch composed of a switch S803 normally closed and a switch S805 normally open, when the operating shaft is in the off position. When a rotation of the operating shaft 363 by. application of the clutch device 361, the boss of the cam plate 374 passed to the right of the control element of the switch device 377 causing the closing of the sensor switch S803 and the opening of the sensor switch S805.

   Just before a complete rotation of the shaft 363 is completed, the loss of the plate 374 acts again on the switch device 377 causing the opening of the detector switch S803 and the closing of the switch S805, after which the device to

  <Desc / Clms Page number 112>

 clutch 361 is automatically @ disengaged at the end of a full rotation. The bat and the mode of action of these two switches will be described in detail in connection with the description of the control circuit.

     when the operating shaft 363 is in its stop position, a stop notch 380 on a portion, which is then a front portion, of the plate 374, comes in priae with a flat spring 381 fixed on a ferreure 382 solidiare of the base plate 201. This snap-in spring and the mating notch give the Clac assurance the positive-acting clutch 361 remains disengaged. This can be seen in Fig. 21.



   A group of three meat 385, 386 and 387 separated by spacer plates 388 are attached to the operating shaft 363 in the vicinity; of the conical collar 365 by means of a screen 389 and a lock washer 390. These cams are not visible in the exploded perspective view of Fig.28, but are also shown in Fig.22. The operating shaft 363 extends beyond the nut 389 and freely rotates a cable drum device 392. The device 392 comprises a drum 393 provided with a hub integral with it, containing a bearing, disposed at the end of the operating shaft 363.

   in contact with an elastic ring 394 fixed in a groove of the operating shaft, The opposite side of the drum 393 is open and receives a spiral spring 395 of the type used in clockwork movements, the outer end of . I spring being engaged in a radial slot 396 of the periphery of the drum The central part of the side of the drum 393 corresponding to the spiral spring comprises an enlarged opening which rotatably receives the hub of a fitting 398 for the winding of the spring and comprising three legs arranged radially

  <Desc / Clms Page number 113>

 element 399. Between two adjacent legs 399 is provided a projection 400 directed laterally,

   one of these projections cooperating with the inner end of the spiral spring 395 so as to constitute an anchor point and to make it a means for pre-winding the spring. Inside the winding fitting is a bearing 404 rotatably mounted at the end of the operating shaft 363 The operating shaft extends a slight distance beyond the fitting 398 d 'winding and journals in a bronze bush 402 housed in an auxiliary support 403.



   The periphery of the open side of the drum 393 has a recess 405 for receiving a segment 406 forming a hardened steel cam. Attached to the support 403 by means of screws is provided a device 407 with a single switch, the contacts of which are arranged so as to form a switch S804 capable of being actuated by cam 406 so as to come into the closed position to energize a circuit indicating that the character wheel is near the end of a line, which causes ignition a signal lamp 1702 on keypad 100 (I'ig.14).



   Attached to the left side of cable drum 393 is a ratchet wheel 410 having on its periphery a number of teeth, adapted to engage so as to rotate the drum clockwise when viewed from above. right (ïlg. 22).



  The ratchet wheel 410 is fixed to the drum by means of rivets and a lug 411 is fixed to the side face of the wheel 410, the purpose of which will be explained later.
Referring to Fig. 22, a stop pawl 412 having a U-shaped middle portion is pivotally mounted on a pin 413 fixed to the flange supporting the cable drum. The pawl arm comprises a beo 414

  <Desc / Clms Page number 114>

 corresponding to the teeth of the ratchet sone 410 and adapted to engage with these teeth t so as to prevent the reverse rotation of the ratchet wheel and the drum under the action of the spiral spring 395.

   The stop pawl 412 is biased into contact with the teeth of the ratchet wheel by a spring 413 fixed to a finger 417, so that the rotation of the cable drum 393 causes the
 EMI114.1
 ; - ;. ".: ge of the periphery of the. ratchet 410 in contact with the edge 414 of the ratchet nose, but prevents the rotation of the cable drum in the opposite direction to that of the treble. shows * The upper end of the stop pawl 412 is provided with a part 418 directed upwards which
 EMI114.2
 is adapted to receive the:.: Ent.ct of a release lever of the pawl (which s:

  xa ccr3.t later) intended to compel the pawl 412 to switch to meet the z'ace tion of its rassort out of its dtrioliquete-o position with respect to. the rechet wheel .1.C $ pÙ!. 'iJh1tt.l1t thus the rotation of the cable drum, under the action of the rassort 395 to a limited position determined by the application of the lug 411 to the contact of a stop piece 419 fixed by means of screws on the rear edge of the right flange 204.



  This stopping position, due to the coor-
 EMI114.3
 data of the device 230 with wheel po4te.cfsïa:, res and of the lever 316 of ma!. 'te ":' 1: .., c, x: .in, x:; ur with the cable 250 determines the position starting point d.2 3.rc on the left side of the shaft 212 supporting the poyte-caracterea st wheel of the printing hammer shaft 314.



   Cable 250 is preferably a double-twist, multi-strand steel aircraft cable, and is wound several times around cable drum 393,
 EMI114.4
 the cable passing so as to move away from the lower portion of the drum towards the front part of the printing mechanism (Figs. 21 and 24) around a pulley 422 horison-

  <Desc / Clms Page number 115>

   fixed. tale mounted on a tourillum 423 / on the base plate 201.

   The cable 250 extends horizontally to a second pulley 424 disposed rotatably mounted around a horizontal axis, which is the axis of a shaft 425 fixed to a fitting 426 secured to the internal face of the left flange 203 After having left the pulley 424 the cable 250 changes direction and passes horizontally behind the shaft 314 to the left of the printing mechanism, and on a third pulley 428 rotatably mounted on a vertical shaft 429 mounted on a bracket 430 fixed on the inter- side. do not. right flange 203.

   The printing hammer cable clamp plate 321 is secured to the horizontal portion of the cable immediately behind the printing hammer shaft 314.. the cable 250 passes over pulley 428 to change direction and returns horizontally to the left side of the printing mechanism where it passes over a fourth pulley 432 rotatably mounted on a shaft 433 mounted on a fitting 434 fixed on the internal side of the flange 203.

   The cable 250 passes over the pulley 432 changing direction and extends again from the right side of the printing mechanism where it makes a quarter turn on a pulley 436 whose axis is slightly inclined so that the cable 250 passes from a horizontal direction to a direction which is tangent to. the upper peripheral surface of the cable drum 393. The pulley 436 is mounted on a shaft 437 supported by a bracket 438 fixed to the outer face of the. right flange 204.

   The clamp 243 supporting the character wheel is fixed on the horizontal part of the cable between the pulleys 432 and 436.



  It should be noted that a fixed elementary movement of the cable 250 between the pulleys 424 and 428 takes place in synchronism with an elementary movement of the cable between the pulleys 432 and 436. This is why, have the lever 316 of the printing hammer and the character wheel support 235 are fixed in line with each other on the corresponding strands of the cable 250, their longitudinal movement will be directly

  <Desc / Clms Page number 116>

 synchronized
In the "line start" position determined by the application of the cable drum lug 411 in contact with the stop 419,

   the character wheel and the printing hammer will be in the position shown in Fig. 21. In this position the lower strand of cable 250 includes the cable ends as seen from the right side of the impeller mechanism. The eyelets 440 are crimped and brazed on each end of the cable 250 and are connected by a spring 441 intended to introduce a suitable tension in the cable.



  Considering again Fig. 22, the clockwise rotation of cable drum 393 will pull the upper strand of cable towards the drum. This moves the upper strand of the cable 250 to the right (Fig. 21) and simultaneously moves the character wheel device 230 to the right. The cable strand 250 immediately below moves to the left which pulls the character wheel. cable strand 250 located immediately behind the printing hammer shaft 314 to the right, forcing the printing hammer lever 316 to come directly onto the face of the character wheel device 230 Thanks to the provisions which come from 'be described the cable drum 293 moves one tooth at a time, which, as described,

   creates a division effect corresponding to the interval of a character, ensuring a right movement of the character wheel and printing hammer
Positive clutch of the operating shaft.



   The construction and function of the positive clutch 361 will be described with reference to Figs. 21, 22, 28,29 to 32. When the printing mechanism is started,

  <Desc / Clms Page number 117>

 via the control circuit, the motor B801 acts continuously to also continuously rotate the drive element of the clutch 361, the
360 pinion / spur gear, through shaft 357, silent pinion 358 and motor pinion 353.



  When the clutch 361 is engaged (Fig. 30) the pinion 360 engages with the driven element 362, and drives it, through the pawl 446. The driven element 362 is mounted so as to positively drive operating shaft 363 when the clutch is engaged. The driven element 362 is constituted by a hub 447 having on one side a part 448 fixed by screws on the operating shaft 363.

   There are provided two axially directed pawl pins 449 fixed in diametrically opposed positions on the opposite side of the flange 450. The pins 449 are force-fitted into corresponding holes provided in the flange 450 and brazed, or fixed in position in another way. Each axis 449 comprises a first annular shoulder 451 which rests on the surface of the collar 450 and, in close proximity, a shoulder 452 of smaller diameter. A circular return plate 453 comprises two elongate openings 454, formed ciroonferentially and diametrically opposed, so that the plate 453 can be mounted with its openings 454 engaged with the shoulders 452, so as to remain in contact with the shoulders 451.

   The oblong openings 454 allow the plate 453 to undergo a small amplitude rotation coaxially with the hub 447. The thickness of the plate 453 is less than the depth of the shoulder 452, so that a pawl 446, pivotally mounted on the plate. axis 449 will remain in contact with the shoulder 452 but will remain free with respect to the return plate 453.

   Snap rings 456 fit into grooves in pins 449 to hold

  <Desc / Clms Page number 118>

 axially the pawls 446 on these pins and the pawls 446 have an arcuate shape and when mounted in position they can pivot about the pins 449, to engage with the teeth of the pinion 360 or to move away from them The free end 457 of each pawl has an opening and receives a guide pin 458 force-fitted into the opening and secured to the pawl by brazing or other suitable method.



   As can be seen in Fig. 32 the left end 459 of the stud 458 protrudes a small distance from the side of the pawl and when the clutch '-si. assembled the guide ends 459 are disposed in windows 460 having the same inclination, and formed in diametrically opposed positions on the deflection plate 453 The ends of the pawl shaft 449 and the pawl guide pins 458 have grooves intended to constitute anchoring elements for springs and (Fig. 29)

   a coil spring 462 is connected to the axis 449 of a pawl and to the guide pin 458 of the a-bre pawl. 0 The tension spring 462 thus tends to attract the free end of each pawl towards the point hinge of the other pawl thereby moving each pawl to a position in which it engages with drive pinion 460.

   A drive finger 463 is formed on each pawl 446 at the middle of its inner edge and when the pawls are able to resiliently engage with pinion 360 the opposite finger 463 engages with the teeth of pinion 360. The rotation of pinion 360 takes place counterclockwise and for the clutch position (Fig.30) this rotation causes a tensile force on the pawl pin 449.



   Each time the return plate 453 is free to move the force of the springs 462 and the end

  <Desc / Clms Page number 119>

 guide 459 of the studs 458 engaged in the corresponding window 460 of the plate 453 acts on the latter so as to move it counterclockwise to the limit position determined by the application of the ends of the arched slots 454 with the shoulder 452 of the pins 449. In this position the guide pins 458 are at the inner end of the windows 460 of the return plate and the fingers 463 are engaged, in diametrically opposed positions with drive pinion 360.



   When the clutch mechanism 361 is rotating and the plate 463 is abruptly locked, the inertia of the driven hub 447 and operating mechanisms coupled with the operating shaft 463 has an action such that the the operating shaft tends to continue rotating and the fixed axes 449 move from their position, in the arcuate slots 464 of the plate 453, as shown in Fig. 30, up to. ± 1. the other end of the arcuate slits 454 as in Fig. 29.

   Due to the fixed distance between the pins 449 and the guide pin 458 of each pawl, each pin end 450 must move towards the outer end of the mating window 460 of the $ 53 tray, which in turn restricts them. two pawls 446 to separate from each other against the force of the springs 462 which causes the release of the fingers 463 from the pinion 360 and ends the drive between the toothed wheel 360 and the hub 447. The friction inertia of the mechanism connected to the operating shaft 363 prevents a reverse rotation of the operating shaft which would allow the return to the engaged position of the fingers 463 with the

  pinion. To guard against any tendency for the operating shaft to rotate slightly in the opposite direction, the previously mentioned latching notch 380 of the

  <Desc / Clms Page number 120>

 plate 374, forming a cam, of the friction clutch co-operates with the elastic plate 381 and positively prevents any reversal of the direction of the operating shaft.



   To make it possible to block the rotation of the plate 453, a stop lug 465 is formed at a point on the periphery of the plate 453, the front edge of the lug 465 lying in a plane passing through the axis of rotation of the plate. 'clutch . The blocking of the plate 453 is controlled by a stop fitting 4-36 pivotally mounted on a pin 467 fixed to the inner side of the flange 208 supporting the operating shaft. Also fixed on the same side of the flange 208 is provided a bracket 468 supporting an adjusting screw 469 and constituting an anchoring point for a spring 470 biasing the stop bracket 466.

   The latter comprises a tab 472 directed horizontally and a flat portion 473 directed, downward, comprising two appendages folded upwards and crossed '} by the axis 467 on which they are retained by means of an elastic ring The horizontal tab 472 has a @@ patch edge. 475 which when the stop fitting 466 is urged by the spring 470 so as to constrain the patt3 472 remain applied on the periphery of the plate 453,

   is in the blocking position relative to an edge of the lug 465 The downward portion of the stop fitting 466 comprises an anchoring member for one end of the spring 470 and also carries a plate 473 forming an armature which is rigidly fixed on it.



   As can be seen in Fig. 29, the stop fitting 466 is biased in the locking position in contact with the plate 453 under the action of the spring 470, a position in which the portion 473 of the fitting 466 supporting the frame is pressed against the adjustment screw 469 the screw 469 is adjusted so that the tab 472 does not

  <Desc / Clms Page number 121>

 is not constantly applied on the periphery of the plate 463 but, in the position where it is requested by the spring, is in contact with its periphery, on the course of the lug 465.

   Immediately opposite the stop fitting 466, there is provided a solenoid E803 for actuating the clutch, fixed to a fitting 478 in the form of an eye secured, for example by spot welding, to a rope. 479 integral with the base plate 201 The solenoid E803 has a position such that its polar core is in the immediate vicinity of the armature 476 so that a suitable air gap is obtained between the core and the armature, allowing a maximum concentration of the magnetic flux between the core and the armature as seen by comparing figures 39 and 30,

   which makes possible a tilting of the stop fitting 466 sufficient to withdraw the stop edge 475 out of the path of the lug 465
The actuation of the solenoid E803 is temporary and is caused by a start signal from the control system already as it has been / described, after reception of a combination of signals by the print matrix.

   Temporary energization of the solenoid E803 releases the plate 453, which allows the clutch 361 to engage with the operating shaft 363 and to make it turn in the printing mechanism 52 when the solenoid is disconnected, the fitting stopper 466 is again biased by the spring 470 in contact with the adjusting screw 469 so as to engage its stopper edge 475 on the path of the lug 475 thus causing the disengagement after a complete rotation It should be noted that the effective stop position of the operating shaft occurs after a slight angular displacement,

  after the stopper 465 has applied to the stopper edge 475.

  <Desc / Clms Page number 122>

 angular is equal to the stroke of the axis 449 made possible by the arcuate slots 454 of the plate 453.
Solenoid E803 may be referred to as a "transfer solenoid" because its relative position between the control circuit and the printing mechanism initiates the passage of coded signals from the printing dies into a mechanical operation of the printing apparatus. .



   Positive rotation of operating shaft 463 occurs whenever the ± 803 transfer solenoid is energized and the clutch remains engaged for a 360 rotation. Operation shaft 363, friction clutch pressure plate 374 (stop sensing cam), friction clutch fixed plate 368 (line change cam), spacer cam 385, print cam 336 and carriage return cam 387 rotate positively 360 and floating pinion 372 is frictionally urged to rotate during such positive rotation of the operating shaft, although the exact magnitude rotation varies depending on the character chosen by the character wheel shaft.



   The floating gear 372 of the friction clutch 371 supplies the energy necessary for the rotation of the character wheel shaft 212 and is engaged with a idle spinning pinion 481 (Fig. 20) on a journal 482 which passes through the flange 205 supporting the cable drum and is fixed to the latter by means of an éorou 483. The pinion 481 itself meshes with the pinion 226 of the character-bearing wheel shaft. Thus the rotation of the operating shaft 363 by the application of the positive-acting clutch 361 drives the character wheel shaft 212, through the friction clutch 371, until one stop pawls 258 or 259 is actuated by the received signals, so as to engage

  <Desc / Clms Page number 123>

 with click wheel 254,

    the friction clutch 371 then slipping while the operating shaft 363 continues to rotate until the positive action clutch is disengaged by application of the lug 465 of the plate 453 in contact with the edge 475 stop fitting. The floating pinion 372 of the friotion clutch has fifty three teeth and the pinion 226 of the character wheel shaft has thirty seven teeth, the corresponding ratio allowing the character wheel shaft to rotate by one. turn 'at least for a rotation of about 2520 of the operating shaft As will be clearly seen with reference to the operating diagram of Fig. 38,

   this allows scanning of all marking or space collectors before the operations controlled by the printing mechanism cam take place, to allow signal selection to take place for setting. in position of the character wheel shaft, before printing or spacing, or before operations such as line change and / or carriage return.



   Advance of the character wheel.



   This advance is obtained by the cooperation of a spacing or advancing cam 385 with a lever 484 shown in Figs. 20, 22, 28 and 35-. It should be noted that in the perspective view of the Fig. 28, the relative positions of the various cams of the operating shaft 363 and of the character wheel shaft 212 have been modified to give more clarity to the figure, The lever 484 comprises a mounted hub on a pin 485 fixed on the flange 205 supporting the cable drum, above the operating shaft 363. As seen in Figs. 22 and 35, the left arm of the lever 484 forms a cam follower 486 who

  <Desc / Clms Page number 124>

 applies to the periphery of cam 385.

   The right arm 487 of the lever 484 forms with the left arm an obtuse angle and comprises a pin 488 fixed so as to project laterally at the top of said angle and a finger 489 fixed on the end of the arm 487 A spring 490 is fixed on the arm 487 and on a pin 491 integral with the flange 205 above the lever 484, to urge the latter in the counterclockwise direction, the follower 486 being applied in contact with the cam of spacing 385.



   A two-armed feed pawl 493 is pivotally mounted on spindle 488. A downwardly directed arm 494 includes a flap formed by folding, the bevelled end 495 of which constitutes a clipping edge. quet occurring transversely to the toothed periphery of the ratchet wheel 410 of the cable drum. A spring 496, mounted on an appendage 497 of the feed pawl 493 and on the finger 489 of the spacer lever 484, biases the pawl 493 clockwise the edge 495 cooperating with the teeth. of the ratchet wheel 410.



   The cam 385 has a boss on its periphery and each time the operating shaft makes one revolution, the boss cooperates with the follower 486 of the spacing lever 484 so as to cause the latter to swing in. clockwise, from its normal position, while allowing it to return to the normal position under the action of spring 490.

   Such an oscillating movement of the lever 484 moves the pawl 493 downwardly so as to engage it with the ratchet wheel 410 and to rotate the latter by a distance equal to the spacing of the teeth * The ratchet wheel 410 is held in its new position by the retaining pawl 412

  <Desc / Clms Page number 125>

 while the feed pawl 493 returns to its normal position by exerting its action of stepping the teeth of the ratchet wheel, when the spacer lever 484 returns to its normal position As previously described, such rotation of the ratchet wheel rotates the cable drum, moving the cable 250 to the right, together with the character wheel device 230 and the hammer lever 316,

   a distance equal to the gap, and winding the spring 395 of the drum. This operation takes place immediately after printing, as seen in Fig. 38.



   The feed pawl has an arm 498, extending forwards, which in combination with the position of the folded tab with the ridge 495 lying to the right of the part 418 facing upwards. Retaining pawl 412, is part of the carriage return mechanism, the corresponding operation to be described in a later chapter devoted to the carriage return mechanism.



   Impression ,
It is carried out by means of the cam 386 As has already been described, the printing hammer lever 316 is fixed to an oscillating shaft 314, the normal position of which maintains the printing hammer 324 at a certain distance in faoe from the support. receiving the message and from the character wheel device 230. The print blocking feeler lever 327, attached to the print lever shaft 314 is hinged to the print lever 335, which is biased by the spring 340 so that the cam follower 339 is applied to the periphery. of print cam 386.

  <Desc / Clms Page number 126>

 



   The action of the spring tends to tilt the hammer 324 towards the character wheel, but the decay 306 maintains the printing lever shaft 314 in an angular position opposite: that which corresponds to the action of the spring. .After rotating the operating shaft of approximately 275 (Fig. 38), which allows the character wheel shaft 212 to be brought into a position corresponding to the selection made by the signal from the dies control, the printing cam 386 has a marked recess 499 which allows the follower 339 to move upwards under the action of the spring 340, causing the lever 335 to tilt abruptly in the opposite direction to that. clockwise,

   which has the effect of rotating the lever 327 and the shaft 314 clockwise and causing the hammer 324 to strike the recording medium sharply at the contact of the character wanted from the character wheel. This action occurs for all the positions of the character wheel, except the positions corresponding to the six blanks. As has already been described, if the shaft 212 has a position such that the character wheel presents a blank to the printing hammer, a projection 344 of the print blocking cam 218 (Figs. 37 and 28) will be engaged in the path of the print blocking lever 327 and prevent the shaft 314 from completing an angular print stroke.



   Continuation of movement - rotation of the operating shaft moves print lever cam 339 so as to return shaft 314 'to its normal position, against the action of spring 340 .

  <Desc / Clms Page number 127>

 



   Line change.



   As already stated, the recording medium, on which the reproduction of characters is carried out, is a pressure-sensitive paper having a dark tinted surface, preferably black, covered with a film. extremely fine lightly colored material.

   With reference to Figs. 20-23 and 36 the recording paper 501, its path and the line-to-line advance mechanism of the paper will now be described. A roll 502 of paper is supported in the paper. printing apparatus, the paper can be perforated on its edges to be driven by 'That toothed wheel. in Figs. 20 and 21, the schematic line 501 denotes the projection of the paper web .. the paper itself and its guide elements being omitted for the sake of clarity. Figs. 23 and 36 show brackets 503 supporting the paper roll, secured by means of bolts to the rear interior portion of the top edges of flanges 203 and 205.

   The fittings 503 are profiled in the shape of an eye and have inclined notches 504 on their inner edge. An elastic clamp 505 is retained on a pin 506 in each fitting 503, its movement being limited by the contact of a stop 507 formed by folding inwards of a portion of the inner branch of the fitting.

   A sleeve 508 provided with a journal 509 (Fig. 36) is engaged in each end of the paper roll 502, and the journals 509 are placed in the inclined notches 504 of the fittings 503t under the elastic clamps 505, so as to ensure the rotation of the roller
In Fig. 23 the paper 501 leaves the roll 502 heading downward into a guide passage 511 which completely surrounds the paper web and guides it down to the rear of the wheel carrier 230.

  <Desc / Clms Page number 128>

 characters, then forward below [the shaft 212 and under the upper strand of the cable 250,

   and finally vertically upwards to the right of a guide rod 512 The paper strip then passes upwards between the periphery of the character wheel and the printing hammer 324, then over a drive roller 513, after which the paper exits through a suitable slot provided at the top of the cover 514. The guide passage 511 is made of metal with a polished surface and is fixed by means of fittings (not shown) on the interior face @ flanges 203 and 205.



   The drive roller 513 (Figs 21 and 36) is tubular; it is provided with a coating of a material with a high coefficient of friction, and comprises at each of its ends a plug 516 on which can be provided tips forming a toothing for driving the paper. Screws, passing through the plugs 516, secure the roller 513 to a shaft 517 journaled in bearings provided in the flanges 203 and 205. A feed and ratchet toothed wheel 518 has a hub. 519 fixed on the shaft 517, by means of screws, in the immediate vicinity of the inner face of the flange 205.

   A wheel 520, for manual paper feeding, having a toothed periphery and a fixed hub 521 is fixed by means of screws to the right end of the drive roller shaft 517 and keeps the roller axially in position. with hub 519 and wheel 518. The edge of wheel 520 protrudes above the top of cover 514, to allow hand actuation of the drive roller.

   The position of the roller is maintained by the cooperation of a ratchet roller 522 and the ratchet and feed wheel 518. The roller 522 is supported by a ratchet lever 523 pivotally mounted

  <Desc / Clms Page number 129>

 on an axis 524 of the flange 205 and is biased by a spring 525 so as to apply the roller in contact with the teeth of the wheel 518.



   A device 528 with a pressure roller is mounted to pivot on a pin 527 fixed to the flanges 203 and 205, this device comprising a support 529 on which is mounted a shaft 530 provided in its middle with a roller 531 permanently applied to the upper part of the roller 513. A spring 532 biases the device 528 in a direction such that the roller 531 and a web of paper 501, passing over the drive roller 513, are pressed into contact with the latter.



   The line change, which is an operation performed by the printing mechanism, is performed through a line change lever device which cooperates with a line change cam 369 and with a change sensitive cam 221. line intended to supply drive energy to roller 513.



  Rotation of roller 513 is a direct consequence of angular displacement of a drive lever device 534 (Figs. 20, 21, 22 and 34) comprising a three-arm lever 535 oscillating mounted on shaft 530. The upper lever 536 has a pin 537, on which is pivotally mounted a drive pawl 538 biased by a spring 539 towards an engaging position of the ratchet wheel 518. The middle lever has a hole for use. anchor for a spring 541, the other end of which is fixed on a finger 542 integral with the flange 205. Spring 541 biases device 534 counterclockwise to a normal limit position d. contact with a lug 543 fixed to the flange 205.

   In such a position. limit the ratchet 538 is

  <Desc / Clms Page number 130>

 applied to a finger 544 and not remain in engagement with the
 EMI130.1
 wheel 518. The third arm or lower arm 5Cj supports an actuating lug 547.



   Mounted to pivot on an axis 548 projecting from the inner face of the flange 205, a line change lever 549, actuated by cam, comprises an arm directed towards the rear, the end of which formed a contra-. cam 370 requested on contact with change cam 368)
 EMI130.2
 of line, by a spring 551, and 1) .r arm 552 directs \ 1 '(. -: I the top, This last is provided with garlic axis 554 disposed laterally and, immediately above this axis, ^ i ;;:. lug 55 * 5 A lever 556 sensitive to the chare7amer-i. of J.:1.g1:

  C pivotally mounted on the axis 554, an arm 5 nr.e.r 55., e 2evë 'being disposed opposite the lug' 555 and behind the actuating lug 547, the lower arm 558 comprises a finger
 EMI130.3
 559 probe provided in a lateral position at the end of the arm.

   As shown in Fig. 20, the feeler finger 559 rests on the cam 221 sensitive to line change and on the cam 220 sensitive to carriage return and line capsizing. A spring 560 mounted between the lever 556
 EMI130.4
 sensitive to line change and 1 1 /:

   J49. Used lever 556 clockwise, so that its upper arm t ::.:; peate au ooataet of lug 555 of the upper arm of lever 549
Each rotation of the operating shaft 563 causes, through the intermediary of the cam 369 and the cam follower 370 a change '(13 line, a reciprocation of the lever 549 and of the conjugate lever 556 without influencing the
 EMI130.5
 device 534 with a lever drive levereaa c According to Fig. 37, the cam 221 comprises two locking 3a 3-e, 5t, one of which corresponds to each of the positions of: 3hJ.l1gùment of line and return of wheel carriage i3a: '' ûe.; r, 'rc teres 237.

   In this way a carriage return signal

  <Desc / Clms Page number 131>

 will automatically cause a simultaneous line change and a line change operation can be obtained separately from a carriage return operation If a locking tooth 345 is disposed in the path of the lever 556, when the lever 549 of line change performs an angular back and forth, lever 556 is locked to rocker ;:

  . counterclockwise on the axis 554, which brings its upper arm 557 into contact with the lug 547 of the device 534, and forces the latter to pivot clockwise shows so as to bring the pawl 538 into engagement with the drive and ratchet wheel 518 and to move the drive roller 513 one notch, in contact with the ratchet roller 522. The surface of the roller 513 ,

   coated with a high friction coefficient material advances? the strip of paper 501 by a distance equal to one line spacing each time the wheel 518 advances by one tooth in contact with the roller 522 The lever 556 moves back and forth each time a printing cycle takes place and , if the feeler finger 559 is blocked by a tooth 345 of the cam 221, an advance will take place while, if the finger 559 is not blocked, there will be no advance.



   Carriage return.



  * As already indicated, the return movement of the character wheel device 230 and of the hammer lever. 316, from their position to the right of their line start position to the line start position is referred to as a "carriage return operation".



  The lever arrangement used to effect such movement is shown as a whole in Figs 20 and 22 and in detail in Figs 28 and 35.

  <Desc / Clms Page number 132>

 
 EMI132.1
 Neoûasai energy #; & for aCL-lenobo--. J, c carriage return is mad. L'ii .1,;: p 1m c &.:.! <- 'Xi ai;.: 0' c-'L!:!. of chariot, mounted on amber ri'opévî-tijn) 6'3 * th '! 3c, -. X..i: 564 carriage return C (; ':. I:' bI '} 1.:1 # # .. -.m eu ;? l3 same axis 485 as the lever d * does -pan- -im 3 'A bï'a.3 565 directed downwards comprises u; i eoî.-c> -â-.¯.cr;, i'3? 66 &?' ..;

   -r si- r the periphery of the dams' Le # ;;. = - c '? J..r' ;;: hnl: .r ltNier 564 includes a <.1.Xe 5 -.) 7 a? ].;. t ".-... vuUiutaa yîC fO; r! t1ant stop and a point dacs: '5 :. -.r rft.csr-r1' 5'j \) is mounted between point 5t 3 * * î - 'îoj,: .- 6 -' "# ij = vi> 'R'.j'L d-3 so as to eollloitur the n: - 1.564 ri-jîï 1 :,, ..; 1. ';.:

   J13.-'- 1 '' ..;. of a watch, 1 i Such .-,, -, - i .- :: ... #;, c; v '; ;; ##; -. =: # &&#.;. 56 applies to the periphery d. e .-. u.j! - ,; ' A lv1.er 571 s3b1.s! r-: ts- 1 # #; î ...,:. t tst pivotally mounted on 1 ', - 3' rj "î -. / xoi- c ..; 3ï? i; a.: it them *; middle portion foniaiii îx * -l5.- ;, 'Mc ..lit '.'- r ±: ji- la pntfce 568 & t à liLdi'j.1 2> i f.'9i', p; .t ..: le 5.t: ocii- traire aux aigu311fi3 d '-' iriM u "..'..-: e (iL !. l..s Sfl under the & o- spring 572, vuv ruo.-cii ''.; 1 / lar 564 jc! Uji represented at the Pigo3S, ls sxt-rAa: J t .; ... v b75 -Ui .f -: - v 71- extends to a po;: ItJ.cu. -.- ##: - .-. .! ¯¯. 93? U "-. I ± j: l- tif 215 and carries a 11) t ;.;.: .--, -.- t, - /?..# ..,;. '.'0, gai rtess on cam 219 a-: uyi..lfe av i> :: -. # .A txc ->,>, /i.0-ft and su 1 cam 220 aunaible ma uh; - .. '., ...' 1'î. :: 'M; "t: i;.! r: to - i; e J carriage.

   The braa arrir- tj ff. ".'- V-'i-," 71 * "é% ¯" ï!., G: .... t a position where it '' 'n' .. 'j. .. '.'! .. 6 * i -.--. # ### - ,.> # '. '. "? r." 7rquet of avhnoe 493 t 4 Jit & t'jr: e .- 'ir; i & pca 'IutViil5 - ment, which rests vjui1 the b; \, 49'. ûu l1J, ;; -r.rano- The lever b. .the; v .-. wtu-. <is. t5. 7:; 1 ..n movement of v-s-et-vieni; .i-fut ii.i # .l, :: .- l'iiiwiHJ rl'nijêi-Jî-. tion turns 360 though. depick .it; > * r ## !. ? # i: / r * 1 - / m, 1 * 3 device 215 d6too-r4--, 13 & t 1 .; jp.ptjllt- eu ±> ms on the contrary Normally the at 571 ri:? ;;.; ... ppliciné conijje there

  <Desc / Clms Page number 133>

 tab 568 of the lever 564 and has no action on the front arm 498 of the. advance pawl.

   However if the cam 219 responsive to the carriage return is in a position such that the locking finger 346 is in the path of the feeler finger 574, which happens when the shaft 212 is in a position corresponding to a carriage return signal. , as shown in phantom in Fig. 35, counterclockwise movement of lever 571 is prohibited. Since the axis 567 is forced to move counterclockwise at the same time as the lever 564, the lever 571 must tilt clockwise, causing a clockwise movement. bottom of its rear arm and, through the pin 576,

     rotate the feed pawl 493 counterclockwise, disengaging it from the ratchet wheel 410. In this position of the operating cycle the spacing cam 385 passed in front of the follower 486 and the pawl 493 begins to rise to come to the normal position.

   But since the lug 576 maintains the pawl 493 in a position corresponding to a rotation in the opposite direction to that of clockwise, the tab of the pawl 493 on which the ridge 495 is forced is applied to the upper arm 418 of the pawl of the ratchet wheel and moves the latter in a clockwise direction, so as to release the wheel 410 from its action, which then allows the drum 393 to rotate under the action of the ratchet. 'energy stored in spring 395,

   thus returning the character wheel device 230 and the hammer lever 316 to the head of line position The rotation of the cable drum under the action of its spring is stopped in a position where the lug 411 of the ratchet wheel is applied to the stop 519 (Fig. 22). It should be noted that

  <Desc / Clms Page number 134>

 
 EMI134.1
 the cam 219 sensitive to the r Yc.x 6 .. carriage ',. :: n;: 1Qor'Ï; e. one long tooth 346 and five teeth short 3 1.a tooth .9t; is the only tooth of cam 219 used back 1. t oIiél'a.tl ,,;.; ' carriage return, the den "$ short. * 1 g E .''- ürl: v.

   Its drawn to
 EMI134.2
 another use in mechanisas irrita special aura
 EMI134.3
 Carriage return lock To ensure that the pawl .j.2 retaining the wheel to. ratchet is kept out: the grip with is' i- last until the device at i-oue yc,! "ba-I) S.l'2.B- tbees and the printing lever have returned. * sc :: w'- 1.:! '' 'in the head position of. ::. ::': ';' bzz v., .3.>: ¯f: .. 578 'the locking of rf-tIJu. " from = <i ,:.: t (] I) ......;: 2 and 36) is provided to maintain the lug, 576 to the contract of -i.33.ë4 493 C4 oli- quet, until that the position of 't1: ", ci'2- 1: 1 - (. 1.0 are reached, The device 57S includes a 2fôri.u2? 9 579, fixed by means of via on the b.-@-: 3L1 , F''â. I -? - l:, r flanged 20: .. and having two flanges 5HO <j't p5. : '': '¯1-'; .;.) ::, # "- s? .- the diaat and apron 582 directs vera the (x-Sj, iJ <;:

   1, t; ven ts both arranged on the exterior part :: i.rd '' 1t-: JL ..'- "'11) <, 4: o.v,. Ut; axis dis osp '583 J = îement fait Sai4llie jar 1- té.i: ...: ilè.J: ;;;: &', î 58 3 / laterally protrudes ar 1 apron 52 ei pivotally supports a 1 ,,:, v.l6- .: ..;, ': e: v-, v, i =, - ß-6 584 including a window:,: onts'2: W on 1: é:; P- 1jl'3 in the window of the lever 584 oat P ± .3 "u. E = .-: 'i' '' 1T:>: ', i.; RE: 5C5 hook-shaped, normally dllh" 36., aOL2ûé '1-'. the. ], 3, g..22 $ opposite the pin 576 of the lever Si "X: ùihlt1 0." 1 r "3 * onr- da carriage.

   During the movement: w ... a; :: 0 -îiblueagâ 6a sculpin return lever device. 1t + 7 - ..: 584. which is requested in the amena contrary to r: iS: t: i II: 2'2 $ of a watch by a spring 586, remained in f'aC1) ris l'ergot
 EMI134.4
 576 and tilts slightly when the squeezable lever
 EMI134.5
 moves. But when the lever SO1.dihJ.f; ' 5'il ett l: 1oÇj, 1.1, é
 EMI134.6
 by the cam device 215, the pin 576 is moved
 EMI134.7
 down below the bottom edge of the,: f '.;: rj:' lrr ",: 585

  <Desc / Clms Page number 135>

 which allows lever 584 to swing counterclockwise so that bracket 585 is above lug 576.

   The angular movement of the locking lever 584 is limited by adjustment screws 587 and 588 provided in the flanges 580 and 581 and cooperating with a tab 589 formed by folding at the upper end of the lever 584. the lower recited east of lever 584 forms a cam follower 590 on which the ratchet wheel lug 411 is applied immediately before the lug engages on the stopper 419. the rotation of the drum forces the lug 411 to tilt the lever 484 in the direction of clockwise, against the action of its spring.

   Such action removes the locking hook 585 from its position above the lug 576, allowing the lever 571 to return to the normal position to prepare for a new print cycle. This return movement of the lever 571 also releases the pawl 412, allowing it to engage with the ratchet wheel 410 and the normal advance operation can be performed again,
A carriage return stroke can be obtained manually by pressing a button 592.

   Such an action on the button 592, by means of a connecting rod 593 moves the lug 576 downwards in contact with the locking hook 585. This movement causes the feed pawl 493 to switch in the opposite direction to the one back clockwise by making it act on the pawl 412 of the ratchet wheel to bring the latter into the retracted position and allow the drum 393 to rotate under the action of the spiral spring 495 to the position corresponding to the starting point of a line. The pawl 412 and the lever 571 are swept in position as described above when the corresponding position

  <Desc / Clms Page number 136>

 
 EMI136.1
 dant at the starting point, the U.ll, ", ..,. gene is reached.

   Automatic line change and carriage return operation.



   It takes place whenever the printing mechanism is in the end of line position. * In a
 EMI136.2
 such position the lug 411 of the tambry1 ive ratchet wheel present under a tab 595 (Figs. 22 and 28) forms on an arm of a lever 596 pivotally mounted on a pin 597 fixed on the outer face of the flange 205.



   Lever 596 is biased in the direction of
 EMI136.3
 hands of one, watch by a xesqaxv 598:. "'..; tln to limit position zone defined by' i'a, p'.3.r.!. ox d'vn br-as 599 of the lever on a lug 600 fixed on the flange 205 # l1 front end of the lever 5 '- * - J has a rounded plate engaged in a notch 202 of the cam 220 sensitive to line change and carriage return.
 EMI136.4
 is the only cam of the di:. = o.i.-i.f 2.5 which is mounted in free rotation on the shaft 21 with the caraotè wheel ras o 3, e. normal position of lever 59G, corresponding to the position of its spring, maintains cam 220 in:;:;, 1 ::; ':

   1.i}.;. shown in Fig. 37, although if the cable drum device 492 is in the end-of-line position and
 EMI136.5
 if the lug 411 is applied to the Pû. ',' \ j6 595 to the lever 596, the latter swings counterclockwise, bringing the two bosses 603 and 6C4 of the
 EMI136.6
 cam 220 in the locking position .ï. cont3'31;

   dey 101 [.: 11 :: 'bzz respondents 559 and 574 of the lever-operated device a line change and carriage return Il ;;, !!.] such a position the following printing cycle causes a'9 operation
 EMI136.7
 of new line and an oj .; 4ratioa of carriage return in the way above 4d () l1if.leXl'i; d = ûr3-e in the chapters devoted to the change of ligra and the return of c: .e: .., -,

  <Desc / Clms Page number 137>

 
Note that cam segment 406 of drum 493 operates an end-of-line switch S804, at approximately the time when six character spaces are still available before the end of a line.

   This action powers a circuit going to end-of-line lamp 1702 on keypad 50.



   Selection matrices for the printing device,
Along the rear edge of the base plate 201 (Fig. 20) two die boxes 606 and 607 are fixed with screws. Garche box 606 contains the OR-801 and OR-802 spacing matrix while the right box 607 contains the OR-803 and CR-804 marking matrix (see Fig. 5 for matrix circuits). All the diodes and all the resistances of the spacer matrix and the marking matrix are obtained by molding as a solid compound, such as a phenolic resin, inside the corresponding box 606 or 607, terminals 608 protruding from the top surface of the boxes.

   Fig. 20 shows matrix boxes 606 and 607 with the external connections omitted.



   In Figo23 an interchangeable connector 610 is shown at the top of the box 606, a similar interchangeable connector cooperating with the box 607 * Eight conductors coming from each of the boxes 606 and 607 are formed in separate bundles 611 and 612 leading to plugs 613 which can be engaged in the eight terminals A, B, C, D, E, F, G and H and A ', B', Cet D ', E', F ', G' and H 'of the collector of S801 spacing and S802 marking manifold, respectively.

   The conductors from the spacing and marking dies, the B801 motor, the E801 and E802 spacing and marking solenoids, the switches S803, S804 and S805, the

  <Desc / Clms Page number 138>

 
 EMI138.1
 lighting lamps 1801 and d3 luffiD20 indicating 1802 and 1803 "reception" and "transmission", pass through a cable 615 comprising at its end a J801 socket. intended to be connected to the control circuit.



     The page lighting supporting printing
 EMI138.2
 can be obtained by a suitable I: 1Incement, a set of two lamps 1801 being shown in Fig. 20, the sockets of which are fixed on the inner face of the flanges 203 and 205.



   Represented in solid lines in Fig. 20 and
 EMI138.3
 in phantom in Fig. 21, the i803 ..3.ce, t.ic: d5 reception lamp and the 1802 indicator lamp c1'Énis ,,: 1on û: éw., identical, only one of them being thereby described. The two signaling devices are packaged on the plate of 1: 1 te 201 da mec a. 1oae im1!, D.D..Gt -: .. ', along the front bosd. Each device is based on a flat face 618 of recouir plastic material, D7t- of a material r.p! :: '. That and. mounted so that the chci-c are medium damped, bolts û19, sc-.eae.u.t parts 620 and rubber washers 621, on a square 622 attached to the base plate 201.

   Arranged in the center of the upper 41d of the Q <re 622 there is provided a holder 623 for a small lamp consisting of a flanged socket 624, a protective rubber element 625, two insulators 626, a
 EMI138.4
 terminal 627, a lock washer 628 *. 3 uu éorca 62 l! N'3 second terminal 630 protrudes from socket 624.



  A small lamp 631 is screwed into the socket 624 of
 EMI138.5
 so as to tighten a rubber protective element-JS z32 on the surface 618 The cl .. ucteara from & 3 signal devices pass. Jans the sand Of it ,; And the J801 socket for their connection to the control circuit.

  <Desc / Clms Page number 139>

 



   Operation of the printing device.



   The power source of the printing apparatus is subjected to the action of the main control circuit and. when it is in action, the motor B801 of the printing apparatus turns.



   A signal with five elements coded according to the Baudot system is introduced into the control circuit as has already been described. Any five-element signal, the first element of which is a spacer pulse, results in the introduction of the next four pulses into the CR-801 and OR-802 spacing matrix depending on the arrangement of the four spacer pulses. marking and / or spacing the spacing matrix will act such that a control circuit will be selectively determined, comprising two of the eight conductors terminating at the eight terminals A, B, C, D, E, F,

   G and H of the spacing collector S801 the two conductors are connected to the inner and outer segments of the collector and will be connected by the collector rotor brushes 307 and 308 forming a bridge between the two inner and outer segments of the collector which have been chosen, in one of the sixteen possible angular positions of the rotor 302 As soon as the collector rotor reaches the chosen segments and establishes the desired contact between the two conductors,

   the circuit controlled by these two die conductors will energize the spacer solenoid E801 and keep the preset spacer pawl 258 in engagement with a particular tooth of the stop wheel 254 which is attached to the shaft 212 of character wheel At the operating speed of the printer the brushes 307 and 308 come into contact with each pair of collector segments in 5 milliseconds, a time greater than the 2 milliseconds necessary for the control circuit to actuate the appropriate ratchet solenoid

  <Desc / Clms Page number 140>

 after the brushes have made first contact with their desired segments of the commutator.

     Likewise the marking matrix is brought into play and activated if the first pulse of a five-element coded signal is a pulse. marking. The marking pawl 259 engages a tooth of the wheel 254 and stops it in a position between positions corresponding to the spacer pawl 258, thereby making thirty-two different stop positions of the wheel possible. character wheel shaft.



   Immediately after the proper matrix has been chosen by receiving the coded group of oing elements, an ent signal sent from the control circuit to transfer solenoid E803, actuating clutch thrust fitting 466 to put the clutch into the engaged position. positive-acting clutch. The continuously rotating motor B801 then drives the operating shaft 360 before the idler plate 453 drives the clutch;

     in disengaged position. As the operating shaft rotates by 252o the character wheel shaft 212 rotates, if rotation is possible, by 3600 through the friction clutch 371 At one point of the rotation of the character wheel shaft either of the spacing or marking manifold rotors 302 or 303 forms a bridge between the desired segments so as to instantly energize the corresponding solenoid and maintain a stop pawl meshed with the stop wheel 254 of the character wheel shaft,

      The desired stop position maintains the character wheel 237 in a position where the chosen character, corresponding to the received signal, is ready to be printed on the paper.



   After the character wheel has been put into position by a pawl 4? stop, the friction clutch slips while the shaft 'operation 363 continues its

  <Desc / Clms Page number 141>

 rotation to its final angular position. After a rotation of about 2750 the printing hammer shaft 314 is actuated so as to force the hammer head 324 to strike the paper in contact with the desired character and to break the slight surface leaving on the dark tinted surface of the paper the representation of the character.

   Shortly thereafter, the spacer mechanism actuated pawl 412 to rotate drum 393 and move the type wheel device and printing hammer lever a distance equal to the character spacing of the devices. change of line and carriage return are also actuated but the corresponding operations) will not take place unless the feelers 559 and 574 are blocked by the device 215 with detecting cams, the position of which is established according to the selection of the character wheel Thus,

   if the character wheel has a position corresponding to a line change or carriage return signal the desired teeth of the locking cam device block the feeler finger of the line change or carriage return device to cause the corresponding operation Line change always occurs every time a carriage return signal is received. Cam sensing device c experiences a hammer lock cam.

   printer which cooperates with hammer locking lever 327 to prevent percussion of the. hammer if a blank appears on the character wheel The line change and carriage return occur automatically when the drum comes to the end of line position and are triggered by device 215 in which a cam acts so as to block the line change and carriage return feeler fingers to trigger the two corresponding operations.

  <Desc / Clms Page number 142>

 manual carriage return while remaining part of the carriage return mechanism.



   By means of the cam 374 of the operating shaft, two stop sensitive switches S803 and S805 are actuated when the printing mechanism comes to the stop position, in which the positive action clutch is automatically disengaged. These switches prevent the next signal from being fed into the control circuit until the previous signal is printed and the printing mechanism is released. Their detailed role is described below in the dedicated chapter! to the control circuit.

  <Desc / Clms Page number 143>

 



   The teleprinter recording apparatus comprises means by which the operator can, if desired, record and store a message and subsequently and automatically transmit this message. It therefore comprises an information storage device. and, in view of the lack of space and the conditions under which the recorder has to operate, the most suitable storage medium has proved to be a magnetic medium. Such a magnetic medium achieves satisfactory storage for an indefinite period of teleprinter signals and allows the re-use of the recording medium.



   A steel tape was chosen as the magnetic recording medium because of the long life, in view of the high pressures exerted by the recording and reproducing head, and by subjecting the steel tape to voltage, it has been found that an auxiliary drive for the supply and take-up coils is not necessary, which reduces the weight and complication of the recording apparatus.



   Another feature of the recording apparatus is a new recording system in which the tape advances in steps of approximately 1.9mm while the head is stationary on the boron of the tape and, at desired intervals, after the tape has stopped the recording head moves across the tape and returns in milliseconds. The information corresponding to each letter of the character to be stored is recorded across the tape on separate tracks.



   Because only one head is used to play or record signals on all tracks on the tape, it is possible to record on ten separate tracks across the tape, with the tape having only 2, 2 cm wide, even considering the space

  <Desc / Clms Page number 144>

 necessary for the web feed perforations and a margin on the web edge. While the recording apparatus as described below is ca- separated, transversely to the tape, five flat pable to record on ten tracks / only which correspond to the different Baudot code pulse durations are used in the described teleprinter. ,

   the collector and the recording apparatus being arranged accordingly.



   The new recording apparatus according to the invention is suitable for working in a remote location. the rewinding, reproduction and recording operations all being controlled without any local supervision. The apparatus is designed to ensure safe operation requiring only periodic maintenance visits. Combined electrical and mechanical locking elements are provided to ensure that the recording tape is not completely fed from either reel during the recording medium rewinding operation.



   The recording apparatus comprises two electric motors which rotate continuously when the apparatus is in action and a single motor must be provided to be reversible to ensure the rewinding of the tape. During the reproduction operation, the electric circuit. of. The recording mechanism only requires a voltage amplifier for the output of the recording head. The output of the amplifier is switched in the five relays.3 controlled by thyratron in the teleprinter system which stores the information to be. used by the printing apparatus and by the electronic transmitter, as explained above with regard to Fig.8.



     .At. during a recording operation, the erasing head of the recording device is excited by a current at 400 periods per second, available at the main power source of the airplane.

  <Desc / Clms Page number 145>

 
 EMI145.1
 record is brought to a collector in the recorder,
 EMI145.2
 whose contact arm moves in caYmr) ai tsa: rsce with the recording head to ensure the oor; éle: l;: 1 in desired
 EMI145.3
 .between the different coded signals depending on the system
 EMI145.4
 Baudot and the corresponding tracks in the recording tape
 EMI145.5
 gistreuse
 EMI145.6
 With a band of 675 meters of useful length, l 8J: 1 = magl1é registrar -; :). TL '"can 0LlJ.1, gasoline about 3600 characters which corresponds on average. 1600 T :: f'L3 # l, wine: f:

  'ol'i113Q, tion to be recorded can be provided: .. recorder any speed and can. Sire introduced on the keyboard at the rate of a letter 8. la. times 8U one- indefinite duration
 EMI145.7
 denies. After the message has registered, the bsnda and
 EMI145.8
 rewound and we perform the 'r,., A: .s, -: = v: Gfiux at a uniform speed with a view to a mii': 1ci ',:.:. n dE: s-tin0G to à.e8 receiving atatluns Given that the reproduction is E: 3L'7.: - J ment automatically and does not require C "'? i':.; ïC? kl.'i:.: J3: 3¯? Y ' ; .âa ^ !, the message can be transmitted to ie yi'G!: J (.B3 'desired what "' conch, the transmission speed L? C.: 'i' limited What not? the speed of which are capable 0m devices (ttt? l ;; "S and receivers. The following installation 1" Imraxiilc'û. is able to work in a:; 1:

  . t3U8 coapGi'uaiii. an existing teleprinter and is suitable for transmitting at a speed of 60 words or 360 characters at 1s. minute which takes about ten minutes for the '1 :: "' i! J.fJ \! rÎ..8sior: t (Pun massage recorded on the total active length of the mow The rewinding of the â'iCb. é3 takes less than ten seconds? .¯t-hZ J.!, f, TB.l'ii.:, JST1UJJE - Gjmit1i.Ln: lJS '
 EMI145.9
 The storage device is a specially adapted magnetic tape or tape recorder and reproducer.
 EMI145.10
 ment to the Baudot code The code is recorded 1l7.'tß'ti.3't: .f, LteTtl.PYl.Îi across the juban, so that the Üihq signals from the Gode corresponding to the messages are found on the side slide ". , one next to the other T, the ribbon advances intermittently under the head GIll <'ij1t:!:

  'eu.se between

  <Desc / Clms Page number 146>

 successive operations of recording or reproducing each letter or character.



   The operation of recording or reproducing the encoded signals on the five tracks across the tape takes place by means of a single recording head using the same displacement mechanism for both the recording head. recording and playback .0 The tape does not move during the transmission operation, the head moving sideways across the tape at a speed fast enough in one direction to obtain a signal of sufficient amplitude, to be used as an input signal to an amplifier during the playback operation
Referring now to Figo39, the drive mechanism for advancing the magnetic tape comprises a drive sprocket 702,

   mounted on the path traveled by the ribbon between the supply spool 704 and the take-up spool 706. The magnetic tape 708 coming from the supply reel 704 advances under the roller 710, passes between the recording head 712 and the guide roller 714 under the guide roller 715 and around the drive wheel 702, on a arc of about 120, on take-up reel 706. The movement of the tape is entirely controlled by the movement of the wheel 702 and the two reels 704 and 706 are both freely rotatable, without an auxiliary drive.



   The recording tape 7'08, also shown separately in Figs. 40 and 41, is of polished steel sheet. It is provided with a series of perforations 716 along one of its edges to receive the teeth. of the toothed wheel 702, but three zones are provided where notches are formed, the edge of the tape having been removed. The notch 718 is provided near the end of the tape and serves as a control means to prevent the tape from completely exiting the supply spool 704 during.

  <Desc / Clms Page number 147>

 
 EMI147.1
 will save it cv. the. - '"' o - ': ti ..:' r.

   Lcr'onhe 719 si; arranged at the other e ci-i., -lb le-1 -la uba '.' .. t. serves, C ;;; lT1'2) 1 / iJ 'the position of. coc.YH-tc.teui- 3504 (Tdg.44 ot 5) ufi .- 't to warn the operator q .... "s.vau't .. d' J.:!. r2: \: - \ lO:} a 1 &. end .. ruan, it binds! iE ;;: tt (11., 1 & five lin's iiw -..-; *. mcj js qai can c-noore be recorded!:, in lVvyavs-1: '.?.: ",' .-.? r'i: .. eu." s confession L 1, .-, end of rubau Jin os ..îféifc- to pi-'snt to 1 -.!.] "I-l3 o, .c.cjh3 7: 0 is dienaée p, -s do. Cc.f ...: N3s ':'; r, t -v-- -. - # .; ..u. the '[: 3; .. "21 serving as Mt'e aZzii-i> ib' pah'.T 1-?:! ';. 1'1".: 1 âv = , s of jn't ...



  1st of the coil xot.id '; - ;: 7Co v, -iij: -ù the oprtîoa; ld rëenroM.l6r ... eï; t / the bovd 72 wrvri- ïi c-catdjCi- la p ,, 35 .. (JjmOr.? From the starting point of 3. ss areii - ;;;. # ¯ ->? I; .- j; ..?; In saran JJ oofM ...: we veryai, avss plus .u irtil? - 3 -: .. r- - '. la .so. ";. 3in of the function uoinent îie l:?> nï - r \ ¯m-ix- & i3 t ,. J: r: .1 conter tE 1d 5tt iJio; ':::: J nels de Gommatut & ar -: -; iv03 ai 3505 (¯? I ##: * & "-À- e% 50) are commanded by em., ..3h 720 Rt? 1S e; ijuv.iùtâvn'fj reâpec-ti # vement to indicate the knot cù 3 e?! ;; a. Rolled up and to block the keyboard loranae iit-i: .. bn been afct ixi1 > <s.



  The main body v3u rrabc. d''e'n: ',; l:': t; f / nj-rx% proper 708, which fits e-ritro las; Z: <5: '8!; Dté1: Fdp. "És <- ii.tée.3 bïisees ,, of Fi-Ds .40 and 41 Gompi'fcn <î 1 rlu.tilc p3!.!.: i. ' I'onr-egi3ti: ciîiixi; some information:; t, can uvc; '.. #? t.vu.t,) lolJ; i 'r :: 1..i.r. the coils 70 - '! - and, 706 ns scapo-ctant i ..' e of 3'entyaiae- auxiliary device.Myale rbarj d ''; j.s'le.T OL "t ïJ .t'éoj.'uié ps, .r an 'Special sysitem & nt before being pe **? #:

  > if the reels can be smoothed out satisfactorily Operation F-p'eialc. ' i5 pre-grinding con iote to exert a tensile force on the mbM 703 0E 1 "winding under 721 tension around ira çalat GylinJ.riq!. '. e, / (? i.,.' i-2) e The diaa The length of the roller 725 is less than the cylinder width of the coils 704 and 706, so once and for all, received the conformation or the teasion of each elementary length of the mban of. 70F steel will tend to wind

  <Desc / Clms Page number 148>

 with a diameter approximately equal to that of the tensioner roller 723.



   The diameter of the cylinder of the actual reels 704 and 706 being approximately 25% greater than the outside diameter of the cylinder 723 (Fig. 42), the configuration thus fixed to the tape allows the tape to be automatically wound up on the tape. winding reel, as the toothed wheel 702e driving the tape, turns in one direction or the other. The auxiliary rollers 714 and 724 of Fig. 39 have been provided to hold the tape in place on the toothed wheel 702, since it is important that the latter does not slip relative to the tape. In addition, the tape is arranged so that it cannot leave one or the other of the coils.

   The conformation given to the tape exerts a continuous force which tends to cause each reel to wind the tape on itself, which makes it possible to exert a permanent tension on the flap.



   The guide roller 714, disposed directly below the recording head 712, causes the tape 708 to come into frictional contact with the lower surfaces of the head, the necessary pressure being intended to create a magnetic induction through the tape and a sound reproduction electrical voltage supplied by this zuban. Due to the arcuate shape of the cross section of the strip 708 (Fig. 43) produced by the preforming, obtained by the treatment set forth in connection with Fig. 42, the applied pressure will incidentally produce flattening of the strip.

   As a result, the roller 714 is mounted on a lever 725 pivoting on the fixed axis 726 and biased by a spring 727 provided on this lever, allowing the latter to provide sufficient force in contact with the header head. registration 712 to flatten the ribbon passing under the head.

   The intensity of the force exerted by the roller 714

  <Desc / Clms Page number 149>

 on the recording head can be adjusted by means of the screw 728 fixed to one end of the spring 727, the other end of which is fixed to the frame. As an example, satisfactory operating results have been obtained with a recorder installed on an airplane and subjected to the forces due to vibrations and acceleration, using a flap having a thickness of about 0.1 mm. and a width of 22 mm, the force exerted by the roller 714 against the recording head being twists of approximately 300 g.



   The top surface of tape 708 is polished and very smooth and as it only moves intermittently and is at. rest while the recording head 712 moves transversely to the tape during a recording or reading operation, 9 the tape suffers very little wear in the recording region,

   however, the wear on the head itself is not excessive. While rewinding the. tape, that is, at high speed, the recording head is on the edge of the tape, out of the. none used for storing information.



   The tape is passed through a conventionally constructed erase head 730, pivotally mounted, to accommodate the change in tape path between supply spool 704 and roller 710, and the different lengths of tape remaining on the spool. The erasing head 730 is mounted on the free end of the arm 732 which is, preferably, pivotally mounted near the lower edge of the roller 710.



  However, it is practically more suitable for montas? the arm 732 so as to. pivot on the axis of the roller 710, this compromise arrangement having moreover been satisfactory.



   The rollers 710 and 715 are approximately equidistant from opposite sides of the recording head 712 and, in combination with the roller 714 under the action

  <Desc / Clms Page number 150>

 with a spring and with the polar face of the head, they force the tape to perform an invariable path under the recording head whatever the length of the. tape remaining on take-up reel 704 1.

   the galst
715 is located near the periphery of the toothed wheel 702, in order to ensure the application without sliding of the tape along said toothed wheel) Likewise, the roller 724 is arranged, for the same purpose, at the opposite end of the sprocket. Additional guides can be used if necessary to hold the tape against the periphery of the sprocket 702 to prevent slippage of the tape on that wheel.



   A steel tape which has undergone a preforming, according to the treatment described at the head of Fig. 42, allows it to be supplied with a torque tending to force said tape to be wound by itself on each reel, such a system. therefore operating without any slack at any point in the ribbon.



   Since the energization of the erase head 730 takes place during the actual recording, that head is mounted a sufficient distance from the recording head 712 to prevent any possibility of signal interference.



   A concrete embodiment of the recorder, the description of which is presented with reference to Figs 44 to
52, will be studied in the following in two chapters, the first describing the mechanism causing the movement of the recording head 712, from its starting position, on one of the edges of the ribbon, transversely to it, and its return at the starting position for transmitted each character, the second chapter of the description which goes on referring to the various damage mechanisms of the tape when the recording head is not energized.



   Figs. 44 and 45 are top and front views,

  <Desc / Clms Page number 151>

 
 EMI151.1
 respectively, from the recorder. 3ig4.5 represents the reels of tape 704 and 706 and the toothed wheel 702 for driving this raban (in dotted lines), as well as the 'different conjugate rollers, the positions shown
 EMI151.2
 #porrespondam: 'to those indicated in Flg 39 the same references have been used in all the figures to' identify the same elements,
 EMI151.3
 T '' ''.;. E3TiSb .: 'I'Tu.C: h, x'CChi' !. ' TSE HE HEAD? TNICrIS3 ''. ¯'53 htE L'EN REG IST. R1! .U R¯..2.



   All the elements of the recorder are mounted on a frame which can be made of metal, for example aluminum, and which comprises a right end element 734, a left end element 736 and a middle element 737, having an offset rear portion 738, shown more clearly in Fig. 44.

   The elements 736 and 737 are interconnected by longitudinal pieces 739 and
 EMI151.4
 # 740 in one piece with the said elements and constituting .. a first rectangle Element 737 is connected at its front end by a curved element 741 which joins element 734. A similar element 742 is provided at the offset rear portion 738 and it also curves to meet the element 741. .About a quarter of the distance from the front element 741, and towards the e-
 EMI151.5
 rear element 742 (Tiga.4), extends a third longitudinal bar 743 connecting the middle element 737 and the right end element 734, at a lower level, as shown in Fig. 45.

   Three supports 744, 745 and 746
 EMI151.6
 (shown more clearly in FigsA5-47) are provided to allow mounting of the recorder frame in a suitable housing (not shown).



   The tape supply spool 704- and the take-up spool 706 are both suitably mounted on
 EMI151.7
 shafts supported by the frame (Figs. 44s, 45 and 47) and, as specified previously, no provision has been made for

  <Desc / Clms Page number 152>

 special auxiliary drive means .. The roller 710 is mounted on a fitting 711 permanently and suitably fixed to the frame.

   The roller 714 which was located under the recording head rests on the lever 725 pivotally mounted on the bracket 711 by means of the pin 726. A stud 728 screws onto a lower part or extension of the bracket 725 and is attached to one end of the spring 727, the other end of which is connected to a dowel 729 which in turn is attached to the fixed bracket 711. The adjustment of the screw 728 makes it possible to vary the force applied by the spring 727 through the closure 725 to the roller 714 under the recording head 712, so as to adjust the pressure between said recording head and tape .

   The erasing head 730 is mounted on the arm 732 pivotally supported on the rod 733. This rod and the roller 710 are mounted coaxially and rest on the fitting 711.



   As best shown in Fig. 44, camshaft 747 extends longitudinally of the frame and is journal. born at one end in a suitable bearing 748 provided on the right end element 734 of the frame and, at its other end, in a similar bearing 749 provided on the left element 736 it is further secured in position by means, for example, of a collar 751 / Two cams 750 and 752 are mounted on the camshaft 747, near the right element 734 of the frame. The cam 750 is a tape drive cam, . and the cam 752 a cam holding lever actuation and detection.

  <Desc / Clms Page number 153>

 



   The oames 750 and 752 are also represented in Figs
50 and 51. In Fig. 50, the positions of the cams, 750 and 752 have been swapped with respect to their actual position in the other figures, with the sole aim of simplifying the diagram intended to represent the operation of the cams. different mechanisms cooperating with these cams. These are part of the ribbon / feed mechanism and are described in detail below.



   Referring to Figs. 44 and 48, a stop wheel 754 fixedly attached to the camshaft 747 is provided near the end of said shaft, near the left frame member 736. The stop wheel 754 has an extension 756 which is applied to a stop bar 757 mounted on a stop arm
758. This arm 758 is pivotally mounted on a fixed axis 760, being held in the position shown in the figure by the action of a spring 762. An armature 764 of a solenoid 766 is attached to the stop arm 758.

   The solenoid 766 is suitably mounted on the element 736 of the frame, for example by means of a fitting 768, also shown in Figs. 45 and 47 the energization of the solenoid 766 allows the stop bar 757 to be moved out of the way. seat of the extension 756 of the stop wheel 754, which allows the rotation of the latter and of the camshaft 747.



   The gear 770 is mounted in free rotation on the camshaft 747 and is intended to drive the latter by means of a friction clutch formed by a pair of felt discs 772 and
774, a metal friction disc slidably mounted along the shaft 747 and rotating with it, a spring 778 and a cleat
780 mounted adjustable on the same shaft 747 * A cam 782 is permanently attached to the camshaft 747 and a determined part of its surface, 784, in contact with the felt disc 774, acts as a Frication Clutch Fixed Friction Disc In operation, the spring 778 presses the friction disc 776 toward the surface 784 of the cam, thereby applying the felt discs 772 and 774, by pressure,

  against the faces of the rotary gear 770, which allows

  <Desc / Clms Page number 154>

 produce the torque necessary for the camshaft 747.



   Motor 786 shown also in Fig. 45 is attached to the frame and runs continuously when the equipment is in use. Gear 770 is therefore continuously driven by means of pinion 788 provided on the motor, via a fixed gear train comprising a toothed wheel 790 and a pinion 792.



   An "E" shaped support plate 794 shown in Figs. 44-48, and in particular in Fig. 48, is fixed to the frame, for example by means of clips 796 provided at opposite ends of the plate, and extends above the frame and the magnetic flap.

   Four rollers 797, 798, 799, 800 are attached to the plate 794. These rollers have "V" shaped grooves and are in line, so as to receive a rectangular plate 802 having a corresponding edge in the shape of " The plate 802 rests on the rollers 797 and 798 and can move laterally with respect to the direction of tape movement. The recording and reproducing head device 712 is detachably mounted on the tape. plate 802 by means of screws 804
As clearly shown in Figs. 45, 43 and 52 a reciprocating lever device 806 is pivotally mounted on a fixed axis on the middle arm of the plate - the "E" shaped support 794. .

   The device 806 comprises a main arm 810, the upper end of which forms a fork 812 intended to receive a finger 814 rigidly fixed to the movable plate 802. An arm 816 is fixed, for example by means of screws 818 and a part of 'spacing 817, to the main arm 810, its upper end being provided with a contact 818a which has the role of a collector slider.



   According to Figs. 44,45,48 and 52, the lower end of the device 806 comprises a roller, the cam 819 cooperating with the surface of the cam 782. As this cam 782 rotates, the arm 806 rocks around axis 808, driving plate 802 along rollers 797 to 800 and moving the

  <Desc / Clms Page number 155>

 recording head 712 laterally to the recording tape S502 switching contacts (Fig. 44) are visible on plate 794 and are intended to close when plate 802 has returned to its rest position
Referring to Figs. 45, 47 and 49, a switch bracket 820, a plan view of which is in Fig. 49, is mounted on the top of the support plate 794.



  A series of switch contact blades 822, of conductive material, for example phosphor bronze, are insulated. from each other by means of spacers 824 in "Nylon", interposed between the blades. Each of the blades and the spacers has two holes spaced from each other through which pass insulating sheaths 826, for example in "Bakelite". Bolts 828 are then introduced into these sheaths by means of which the assembly is fixed to the fitting 820. Additional spacers! end 827? Also preferably insulating material, serve to mount the contact blades 822 rigidly in place between the arms of the fitting 820.



   The spacing between the contact blades 822 determines the spacing between the adjacent tracks of information recorded on the tape; the contact blades 822 being arranged as shown in Fig. 49, it is possible to record on the useful area of the tape. tape a total of ten information tracks, the useful width of said tape being 22mm. However, in the figure, only five contacts have been shown. Due to the very tight spacing between the blades 822, fixing lugs 830 and 832 are provided, alternately, at different levels, in order to facilitate the connection of the electrical conductors used to supply coded electrical signals to said switch blades.



   A tension spring 834, shown in Figs. 45 and 48, is mounted between the fixed plate 794 and the movable plate 802, one of its ends being attached to one end of a dowel 814 of the plate 802. , and its other end has a dowel 836, so that the recording head located in

  <Desc / Clms Page number 156>

 
 EMI156.1
 In the idle position, as shown, the spring is under tension and its force contributes to driving the recording head 712 across the tape at a substantially uniform speed during the actual duration of recording or reproduction.



   The speed of the recording head 712 during playback has an influence on the signal strength induced by the magnetized region on the tape. For this reason, a uniform speed during the actual playback time corresponding to each cycle d operation is desirable. The force of the spring 834 makes it possible to reduce the load on the arm 810 cooperating with the ring 782, at the instant when this cam and the camshaft 747 undergo acceleration from zero speed, thus reducing the energy to be supplied by engine 786, which allows, on the other hand, the use of a lower power engine.



   As indicated more clearly in Figs. 45 and 47, a fitting 837 rests on the right-hand element 736 of the frame and carries electrical connectors 836 forming terminals, to make the electrical connections of the recorder with the various other parts of the teleprinter. Various electrical elements, such as capacitors and resistors, can be mounted on the recorder frame at will, although in the figure only one capacitor 840 has been provided.
 EMI156.2
 



  MECHANISM D-LN2RAINLYIlqT DU Rtr & 1r- =. Referring to Figs. 44, 46, 50 and 51, the tape drive toothed wheel 702 is rotatably and securely mounted with a shaft 850, one end of which is journaled in a bearing 851 provided on the element. longitudinal 741 of the frame and the other end of which is journaled in a bearing 8 @ 3 provided on the longitudinal element 742. A ratchet wheel 852, the entire periphery of which is provided with teeth a :! firmly distributed is also rigidly mounted on the shaft 850. An operating disc 858 is mounted with play on the shaft 850 and is driven by a friction clutch comprising a pair of felt discs 854 and 856, arranged at on either side of the operation disc 858.

  <Desc / Clms Page number 157>

 



  A friction operating disc 860 can move along the shaft 850, but is integral in rotation with the latter and forced to rest against the felt disc 856 by the spring 862 and the stop 864, this the latter being fixed to the shaft 850 by means, for example, of a screw 866. One of the faces of the ratchet wheel 852 is used as a friction disc, this wheel being integral in rotation with the shaft. 850.

   The operation disk 858 changes position when the direction of rotation of the shaft 850 changes and is in the position shown in Fig. 50 during recording or playback, and it moves counterclockwise. clockwise, at an angle of about 20 to 30, to its other position, when the shaft 850 turns counterclockwise
Referring now to Figs. 44, 45, 46 and 51, it can be seen that the toothed line 870 is mounted for free rotation on the shaft 850 and drives the latter by means of a friction clutch comprising discs in usual felt 872 and 874, a. friction disc 876 fixed on the shaft 850 and a disc 878 which rotates simultaneously with the shaft 850,

  but can slide on the last oe. The friction disc 878 is biased in contact with the friction disc 876 by the spring 880 and the stop 882
A reversible electric motor 868 is fixed to the frame and has a pinion 884. The motor pinion 870 is driven continuously in the direction indicated by the arrow (Fig. 45) during recording or reproduction, by a pinion 884, by via a stationary gear train shown in Fig. 46, and comprising a toothed wheel 886 and a pinion 888 mounted on a stationary shaft 890.



   Referring to Fig. 50, it can be seen that the rotation of the shaft 850 is controlled by the roohet wheel 852 and an escape pawl 892 during the normal recording and reproducing operation, ion. A nose 894 provided at the top of the pawl 892 normally engages between two teeth.

  <Desc / Clms Page number 158>

 of the ratchet wheel 852, the lower beak 896 being at the same time out of engagement with the teeth of this wheel the exhaust pawl 892 is mounted to pivot around the axis 898, itself mounted on a lever 900 of rotation A stud 904 screws into a tab 905 of lever 900 and adjusts the operation of the exhaust pawl.



   892
The upper arm 894 of the pawl / is released from the ratchet wheel 852 by a lever 906, this lever being mounted to pivot on a fixed axis 908.Au. as the camshaft 747 rotates, the nose-shaped end 910 of the. lever 906 is forced to rise which forces the other end of this lever to lower against the arm 912 of the pawl 892, and thus bring its upper beo 894 out of engagement with the teeth of the wheel to ratchet and bring its lower beak 896 into engagement with a tooth of that wheel. When the lever 906 returns to the position shown in this figure, the spring 902 returns the climate 892 to the position shown, due to the continuous application of a motor torque to the 850 shaft,

   by means of the friction clutch cooperating with the toothed wheel 870, the roohet wheel advances by one tooth for each revolution of the camshaft 747.



   The rotation lever 900 is pivotally mounted on the fixed axis 914 and has an arm 916 which penetrates a great distance into a groove in the operating disc 858, thus preventing it from rotating during normal operation. recording and playback, the arm 916 of the lever 900 maintains the disc 858 in the position shown. The reverse rotational movement of the shaft 850 causes the disc 858 to rotate a small distance in the counterclockwise thereby causing the lever 900 to bend around the pin 914 and drive the entire exhaust pawl 892 out of the ratchet wheel. The angular displacement of the disc 858 is controlled by the arm 916,

   and as soon as the shaft 650 begins to rotate clockwise again, the disc 858 will return to its position shown in the figure if the arm 916 is free to move. The arm 918 of the lever 900 s' applied

  <Desc / Clms Page number 159>

 against an adjusting screw 919 for adjusting the operating position of said lever 900 which, in turn, controls the position of the exhaust pawl 692 relative to the ratchet wheel 852.



   A trigger lever 920, pivotally mounted on the fixed axis 922, is provided under the arm 918 of the lever 900. The lever 920 comprises an arm 924 intended to cooperate with the notched end. of the arm 918 - of the lever 900, when the shaft 850 turns counterclockwise. The spring tends to apply the arm 924 against the arm 918 to bring the locking of the lever 900 to its other position ;;

  , during the rotation of the shaft 850 in the counterclockwise sers, a second arm 928 of the. trigger lever 920 disposed at a distance under the extension 930 of the tape feeler lever 932, is lowered so as to release the arm 918 and disengage it from it. arm 924, when blocked.



   The feeler lever 932 has an elongated middle window 934 which allows it to pivot about a fixed axis 936 and to effect an axial movement in the direction of the major axis of this window 934. A nose 938 provided on the lever 932 is applied by a spring 942 against the edge of the ribbon 708 and / or the rim 940 of the toothed wheel 702 for driving the: ribbon A switching contact actuator 944 is provided near the nose 938 and a finger 946 cooperating with A trigger lever is provided at the end of an arm, the other end of which is close to the window 934.



   The toothed wheel 702 has a width slightly less than the width of the strip 708. The teeth of this wheel and the perforations made on the strip are so arranged that the edge of the strip and the rim 940 are located at the edge of the strip. plumb with one another The rim 940 does not complete the revolution of the wheel 702 and when either of the notches 718 or 720 is present on the toothed wheel 702 (Figs. 40 and 41 ), lever 932 moves inward,

   thus opening the contacts of switch S 503 and closing those of switch S505. Notches 718 and

  <Desc / Clms Page number 160>

 720 of the tape are arranged so as to. constantly present the same position with respect to the toothed wheel 702, the distance between the surfaces 721 and 722 of the notch 720 being equal to the peripheral distance between the surfaces 947 and 948.



   At the end of the ribbon stroke, during a recording operation, the recorder stops when the lever 932 enters the notch 718, due to an electrical interconnection.
 EMI160.1
 than caused by the opening of contacts S503. However, during rewinding, this electrical interconnection is inoperative. When the tape feeler lever is placed in the notch 720, (Fig.



  41), of the tape, the toothed wheel 70 is mechanically stopped by the nose 938, which is applied simultaneously against the edge 721 of the tape 708 and the surface 947 of the rim 940 of the wheel 702.



   The width of this wheel 702 is such that the edge 723 of the strip 708 normally protrudes on the rim of the wheel 702, the edge 719 being flush with the rim of this wheel. The switch S504 includes a motor 945 which does not apply. against the edge 723 of the tape 708, -the so that the aoteration member of the
 EMI160.2
 Switch S5G4 is held normally open by the overhanging edge 723 of the tape and is rotated when the notch 719 of the tape is on the gear 702 (4, in the position in which the emotion member. '1ement .5 entro 2n eontaet with the cna o .. che 719. As a result of the fE':

  rmetu1.'e C \ t c-caiajivteteur S504, the ribbon end warning lamp 1702 does not light up
The lower extension 930 of the feeler lever 932 is not released from the arm 928 provided on the trigger lever 920,
 EMI160.3
 when said lever 932 af'.fI; t "2e a moving, the pivoting, except during the time interval prr; ûize from the beginning of the recording.

   The spring 942 forces the lever 2 ('ig50fi to perform a movement in the direction of clockwise *: clockwise, when the spout 938 comes into contact with a notch formed there-
 EMI160.4
 laterally on the strip 708, c ('. t'res: ponl3.n. to the part of 3a. toothed wheel 702 without rim 940. The movement of the lever in the counterclockwise direction can be extended.

  <Desc / Clms Page number 161>

 increased by moving finger 946 up.



   The lever 932 is subjected to a further movement which takes place when the surface 948 of the rim @ 940 of the. toothed wheel comes in contact with the top edge of the. nozzle 938, thus forcing the lever 932 to descend, and preventing any rotation of the shaft 850, regardless of the operation of the other mechanisms.



   The trigger lever 950 sensitive to contact with the band is pivotally mounted on the fixed axis 952 and is biased by a spring 934, so that, in normal operation, the end
956 will not be in contact with the finger 946 of the probe lever
932. the opposite end 958 of the trigger lever 950 tends to rest against the surface of the cam 752 of the camshaft.
747.I1 applicable. note, that by referring to the figures - except Fig. 50 @? the positions of cams 750. and 752 of shaft 747 have been reversed in Fig. 50 for clarity.



   As the camshaft 747 and cam 752 rotate, the end 958 of the trigger lever 950 is progressively lowered so as to lift the end 956 and almost contact the finger 946. It is only when the lever 932 is lowered by the surface 948 of the toothed wheel 702 that the upward movement of the arm 956 will cause the lever 932 to pot on the axis 936. This pivoting movement forces the nozzle 938 to s' move away from the edge of the wheel 702 and allow the tape to advance.



   OPERATION OF THE RECORDER DEVICE.



   When the recorder is turned on and ready to run, motor 786 rotates continuously and causes gear 770 to rotate continuously providing constant motor torque through the conjugate friction clutch, thus tending to cause the camshaft 747 to rotate. Normally, the stop wheel 754 keeps the shaft 747 stationary. By applying an electrical pulse to solenoid 766, stopper bar 757 is momentarily displaced back from its position of contact with stop wheel 754, allowing camshaft 747 to revolve.

  <Desc / Clms Page number 162>

 



   Cam 782 is normally stopped at the top of the boss in its surface, so as soon as bar 757 ceases to engage with stop wheel 754, cam follower 819 forces the lever back and forth. 806 to start its reciprocating motion and to drive the plate 802, mounted in the grooved rollers 797 to 800, laterally with respect to the tape 708. The register head 712 is supported by the plate 802 and is thus quickly driven through the tape. tape due to the contour of the profile (Fig. 50) of cam 782 and spring 834
As the recording head 712 moves across the tape,

  the switching contact 818 moves simultaneously through the contact blades 822, in order to successively apply the encoded signals representing each letter or character to be transmitted to the recording head 712.



   The recording operation takes place during the very beginning of the initial part of the revolution of the camshaft 747 and the movement of the recording head 712 relative to the tape 708, which is at rest for this time interval is very fast, so that during the read operation an induced signal picked up by the recording head will be strong enough to drive the amplifier.
During the remaining period of rotation of the camshaft 747, the reciprocating lever is returned to its normal position, against the action of the spring 834.



   The operation of the tape feed mechanism will be better understood, referring to Fig. 50. The 870 drive gear is driven 1-: or continuously by the 868 motor, which allows a torque II. ') continuous rate, through the intermediary of the friction clutch, to the shaft 850, which tends to rotate the toothed wheel 702. The camshaft 717 having performed a full turn, the pawl control lever 906 forces the upper beo 894 of the exhaust pawl 892 to disengage from the teeth of the ratchet wheel 852,!.!. At the same time, the lower tooth 896 takes precedence. with a tooth of the wheel 852.

   This

  <Desc / Clms Page number 163>

 
 EMI163.1
 causes a partial displacement of the wheel 702 the displacement
 EMI163.2
 final taking place. when the nose 910 of the lever 906 descends into the position shown in Fi6,, 50 just before the moment when the camshaft 747 is stopped by the wheel r3'r.z'réL 754
 EMI163.3
 and stop bar 757 This action forces the top nose 894 of the exhaust pawl 892 to come into the path
 EMI163.4
 of the next tooth of the ratchet wheel 852 as a result of the action of the spring 902.), In the embodiment shown in the drawing, the number of teeth of the rock wheel 3.852 is chosen so that the m'-ban moves dtU: 10 distance of about 2 mm between two exlï eit; r 'N, u-le.: wf As long as? the feeler lever 932 is 192; à, Iî '; k' .. 1 in the position e:;: i ".: é;:; c .:

  ü "t.60 at la: f :: it1 ,,:,: e in the presence of the non-e part!; '0':! li e, 'lu m-ban î: e: .1.' the gear 70291st lever 9 * 30 moist 6-3LC. ' cam 752 n 9 af: it is not in normal operation.



  1!: 11 S (: referring to posed in Fig. 44}. The contacts in com .1ta; iï811:!: S5O2 are mounted so as to close when the plate 102 is in, i.li3 its position starting and flouring during the interval d0 tempo necessary for the rotation of the rowing shaft - 747-. These ion contacts are part of an electrical interconnection which C: LrS.CG2ie the pulse of start to be applied to solenoid 766 until the cam part has been turned (3 SOl] full turn.



  ..t. :: Zl se ;; 0pOl'te. ;; lt in Figs <, 40 and '1,4. "The cycle of operations described above i :: onti: 1.Ù'2.: 3 jIl6qu.it this bare the notch 7J.9 made in the tape 7W3 passes on the toothed wheel 'jt2e z. this instant, the contacts at-à ,,' JillEIl1'ta tion nOl; nlf.Ù6'1 (-nt closed 3504. also shown in! 1.2Lg.50e close to complete a circuit and switch on an inOleatrice 1701 of the keyboard operators which provides the operator with a - # bignal the p: r: \ ï. "l -: '1Ll1t as the 1.uban approaches
 EMI163.5
 of its end.
 EMI163.6
 



  'atxc; -ro; 3Q keypad operation can continue until 1.; E., xac 718 is reached At this instant, the lever p, - "lp0u ;. ' from 1.'tthl:! 11 932 jfj move inward

  <Desc / Clms Page number 164>

 to open the switching contacts S503. These contacts are connected in series with the contacts S 502 and as long as one or the other of the series of contacts remains open, the electrical pulses cannot be applied to excite the solenoid 766, thus preventing any advance. new ribbon and blocking the admission of other characters into the keyboard.



   The operator has at his disposal a rewind switch which allows the direction of rotation of motor 868 to be reversed, which results in reversing the direction of rotation of gear 870 and of the shaft. 850. During the rewinding operation, it does not matter whether the motor 786 is energized, since the rewinding operation is entirely under the control of a mechanism cooperating with the shaft 850, the stop wheel 754 does not. never released
When the shaft 850 begins to turn counterclockwise (Fig. 50), the operating disc 858 instantly turns counterclockwise through the friction clutch cooperating with it,

   thus causing the lever 900 to pivot around the axis 914 and moving the exhaust pawl 892 away from the ratchet wheel 852, to allow the rewinding operation to be carried out rapidly. In rewinding operation, the notch 720 in the recorder tape (Fig. 41) coincides with the surfaces 947 and 948 of the edge 940 of the ratchet wheel 502.

   The lever 932 is forced to enter the notch 720 of the ribbon by the spring
942 and the lower edge of the nose 938 of said lever also comes to rest against the surface 947 of the rim 940, thus stopping the rotational movement of the toothed wheel 702. The motor 868 continues to urge the motor to rotate. shaft 850, through gear 870 and the corresponding clutch @e, until the rewind switch in the control box is deenergized.



   When the lever 932 enters the notch 720 of the

  <Desc / Clms Page number 165>

 ban, the switching contacts S505 this close and turn on the lamp 1602 of the control box containing the recloser switch, to indicate that the rewind operation has been completed. The opening of contacts S503 does not affect the operation of the equipment at this time.



   When it is desired, either to record on the tape, or to reproduce a previously recorded message, the motors 786 and
868 are started again, so as to rotate continuously in the directions shown in the figures, the arm 924 of the trigger lever 920 will have meanwhile locked the notch of the arm 924 pre @@ the lever 900, which holds the latter in its other position with the exhaust pawl 892 disengaged with the ratchet wheel 852. When the motor 868 is running, the tape advances to the point where the nose 938 of the lever
932 contacts the surface 948 of the rim 940 of the toothed wheel 702.

   As a result, the tape can thus advance a distance slightly greater than the distance between the erase head 730 and the recording head 712.
If the next operation is a read or reproduce operation, the erase head 730 is not energized. If, on the contrary, it is a recording operation, the erase head is energized the instant the direction of rotation of motor 868 is reversed to initiate the erase operation during movement of toothed wheel 702 to the position determined by application of surface 948 against nose 938.



   This operation erases all signals previously recorded on the tape for the first few centimeters, pending preparation for the next recording operation, the erase head 730, during this time, remaining constantly energized.



   In summary, before starting the recording operation, it is necessary to rewind the tape, so that the first recording position of the tape has passed the erase head 730, towards the supply reel 704. From then on. that the equipment is switched on, either for a recording operation,

  <Desc / Clms Page number 166>

 or in preparation for a reproduction operation, the tape is advanced rapidly to a position where the first line to receive information is directly under the recording head 712.

   If a recording operation is signaled, the erase head 730 releases the first part of the tape, as the tape advances to the position where the received information is to be recorded.



   Referring again to Fig. 4, when the surface
948 comes into contact with the upper part 938 of the feeler lever 932, this latter is lowered so that the upper surface of the window 934 is pressed against the axis 936. The lower extension 930 of the feeler lever 932 then pushes back towards the center. lowers the arm 928 of the trigger lever 920, thereby biasing the arm 924 out of the notch provided at the end of the arm 918 of the rotation lever 900. However, the latter remains stationary in its other position,

   because it is not able to return to the position shown until the operating disc 858 pushes down the arm 916. The operating disc
858 cannot be driven in the forward direction unless the shaft 850 has the ability to turn. Thus the escapement pawl 892 remains in an inactive position with respect to the ratchet wheel 852 when the first character, or. letter, is recorded.



   At this time the first letter to be recorded is entered into the keyboard and the start pulse is applied to solenoid 766 as described above. The recording head 712 moves transversely to the tape 708 during the first part of the rotation of the tape. the camshaft 747 and the lever 906 come into contact with the arm 912 of the exhaust pawl 892 when the cam 750 rotates. When the cam 752 rotates the lever 950 sensitive to contact with the ribbon is swung around the pin 952, its end 956 being applied to the pin 946 of the feeler lever 932.



   As the surface 948 of the rim 940 of the drive wheel 702 contacts the upper surface of the nose 938, the lever
932 is in a lower position than the normal position, the

  <Desc / Clms Page number 167>

 finger 946 being applied to the top surface 956 so that, due to the upward movement due to the end 956 of the trigger lever, when the cam 752 rotates, the feeler lever 932 is moved to a position where it ceases to be in motion. contact with surface 948 of rim 940 of drive wheel 702.



   The shaft 850 begins to rotate causing the operating disc 853 to return rapidly to its position shown, thereby moving the rotation lever 900 into contact with the stopper 919 and putting the exhaust pawl 892 in position. , active position with respect to the wheel 852. When the cam 750 returns to the position shown the upper nose 894 of the escape pawl 892 blocks the position of the ratchet wheel 852 the recording device being then ready for the next letter from the keyboard.



   As the surface 948 of the rim 940 of the drive wheel 702 comes into contact with the nose 938 of the feeler lever 932 and pushes the upper part of the window 934 back into contact with the axis 936, the 'lug 944 being lowered below the contacts of switches S503 and S505, thus causing these contacts to be placed in the normal position, as if a full width of tape were present in contact with the feeler lever 932. This allows the contacts S503 to close and the following electrical impulse to be applied to solenoid 766 when the second letter to be recorded is introduced into the keypad
Due to the force exerted between the surface 748 and the nose 938 due to the torque supplied to the shaft 850 through the friction clutch coupled with the gear 870,

   the feeler lever 932 swings around the axis 936 before reassembling in the position shown This allows the lug 944 to be tilted anti-clockwise (Fig. 50) well beyond its normal position, so that the pin 944 releases the ends of the contacts of switches S503 and S505 to return the installation to the position shown in the drawing.



   Of course, the invention is not limited to the details of execution shown and described which have been given only by way of example.


    

Claims (1)

CLAIMS 1.- Telecommunications installation specially adapted for use on a vehicle, characterized in that it comprises the following constituent parts, considered separately or in combinations: a) radio transmission and transmission equipment - reception comprising a command or control device adapted to ensure the selective distribution of: messages to other parties with a view to receiving, transmitting or transmitting or storing for subsequent transmission of messages; b) a device making a recording under the action :. of said command or control device, intended to be selectively energized to ensure a clear recording of messages coming from said reception equipment, after reception of identification signals by a signal analysis device; c) a recorder subject to Inaction of the command or control device to supply, if desired, messages to said radio-electric transmitting equipment for the automatic transmission of messages; d) a keyboard connected on the one hand to said device making a recording and on the other hand either to the radio-electric transmission or transmission equipment with a view to immediate transmission, or to the said recorder in view. automatic transmission. 2.- Installation defined in claim 1 (b) in which said signal analysis device comprises an electronic distributor, capable of taking or having a defined sequence of positions or stable operating conditions, a circuit of. separate input for each successive stage of said distributor, a trigger circuit for each cireuit <Desc / Clms Page number 169> input, and controlled by a predetermined arrangement of a number of simultaneous output signals and acting only in response to said predetermined arrangement of signals for transmitting a signal to the conjugate stage of said distributor, and means acting when said electronic distributor comes into a predetermined stable position, in response to signals arriving at the input circuit, to enable said signal analysis device to produce a number of simultaneous output signals for said recording apparatus, whereby said apparatus acts to produce a printed record of the signals created subsequently. 3.- Installation defined in claim 1 (b) in which said recording device is a printing device comprising a rotating character wheel capable of being selectively placed in position to print a series of characters, an electrical channel. multiple input to said printer capable of being excited according to the coded combinations indicative of the characters to be printed, of the means controlled by the excitation of the said channels for positioning the character wheel, with the character of this wheel , corresponding to the character represented by the excitation of said channels, in the printing position, and means for exciting said channels according to the desired arrangement. 4. - Combination defined in claim 3 in which the means mentioned last comprise a keyboard and a number of switches actuated by the keyboard in a desired arrangement, by lowering a key to control the excitation of said. lanes according to the desired arrangement. <Desc / Clms Page number 170> 5. A combination defined in claim 3, in which the last mentioned means comprise, as a source of. signals, a magnetic storage device. 6. - Combination defined in claim 3, in which the last-mentioned means comprise a circuit responding to a series of groups of signals staggered in time to create a series of simultaneous signals for excitation of said channels. 7. - Instaliation as defined in claim 1 (c) in which the recording apparatus comprises a magnetic tape on which the encoded information is recorded, or from which this information is reproduced, while the tape is stationary and that the recording head moves laterally across the web. 8.- Installation as defined in claim 7, in which the tape advances while the recording head is not energized, means being provided at each end of the tape which are intended to act on the recording apparatus for stop its operations 9. - Installation as defined in claims 1 (c) and 1 (d), in which signals stored in the recording apparatus are transmitted at the same operating speed of the recorder and independently of the speed. to which the signals to be stored have been supplied to the recording apparatus from the keyboard. 10. - Installation as defined in claims 1 a) and 1 (b), in which the control device acts selectively to excite the reception equipment and the recording device to receive any message at a particular frequency or only messages making <Desc / Clms Page number 171> following a coded call signal, at said frequency. 11.- Installation as defined in claim 1 (d) wherein said keypad transmitter comprises a universal bar capable of occupying two positions, and means adapted to act, during movement of the universal bar in one. of its positions, so as to trigger the start of the transmission of a coded signal defined by the situation of the keyboard, characterized in that on said universal bar is provided a device which is made active by maintaining the universal bar in said position, after completion of the transmission of the signal, to prevent the reactivation of said means until said bar is returned to its other position. 12.- Installation as defined in claims 1 (d) or 11, in which the keyboard transmitter comprises keys, a certain number of coding elements capable of being brought by the keys into positions corresponding to different arrangements. , these elements having active positions indicative of a combination of coded signals, and a universal coding element resiliently biased and invariably displaced against the elastic bias by the actuation of any key, the installation being characterized by a certain number of individual members each brought into one of the two positions under the effect of the displacement of said coding element; a single member placed in position by the movement of the universal bar; connecting pieces connecting each coding element with an individual member, acting to cause the positioning of said individual members before the member one is itself in position. <Desc / Clms Page number 172> 13. Installation as defined in claim 1 (b), wherein said recording apparatus is a teleprinter comprising a rotary character and operations selector shaft; means for causing the shaft to rotate; means for stopping the rotation of said shaft in positions determined selectively as a function of the reception in the printer of a combination of coded signals, comprising a collecting or switching device comprising a part synchronized with the rotation of the tree. 14. - Recording apparatus comprising a tape disbursing coil, a tape receiving reel, a magnetic tape extending between the supply reel and the receiving reel, a recording head cooperating with said band, a head erase cooperating with the tape and arranged at a certain distance from the recording head, means for recording information transversely to or along the width of the strip, by means of the recording head, while the tape is stationary, means for causing the tape to advance step by step, each elementary advancing movement following a recording operation, a mechanism for deactivating said means provided for advancing the tape during the rewinding operation Of the band, and means locking said mechanism in the active position at the start of a recording or reproducing operation following the completion of the rewinding operation, to allow the tape to advance over a length at least equal. the distance between the erasing head and the recording head, before the recording head is energized. 15 @ - Recording apparatus as defined in claim 14 in which the tape drive wheel comprises on <Desc / Clms Page number 173> its periphery in one edge a recessed marginal portion, the linear length of which is at least equal to the distance between the recording head and the erasing head, a similar recessed portion is provided on one of the edges of the tape in the vicinity of the beginning of the recording zone, a tape feeler lever adapted to cooperate with said recessed parts, in the event of a coincidence, to positively or mechanically stop the rewinding of the tape and, when rotating the belt drive wheel in the forward direction, to allow the tape to advance a distance at least equal to the length between the erase head and the recording head. 16. - In combination with a coding bar transmitter keypad: the improvement characterized by a blocking device which is brought into an active position corresponding to the blocking of all the coding bars, at the end of the travel of a bar. universal, after a complete active run of the said coding bars; and means adapted to be actuated by the movement of said locking means in the active position, to cause the transmission of a combination of coded signals as represented by said coding bars 17.- Code bar transmitter keypad, as defined in claim 16, characterized in that the blocking device comprises a wedge-shaped element for blocking the code bars, which controls the start of the operation. - mission; means are provided in combination with said blocking wedge for preventing its movement towards a blocking position, until the universal bar is brought into the active position; and an anti-repeat device cooperates with <Desc / Clms Page number 174> the blocking wedge and with the universal bar to prevent repetition of the transmission of signals, until the universal bar has been moved to its inactive position. 18. - TTY printer comprising a rotary shaft for selecting characters and operations, characterized by s means adapted to cause rotation of the shaft; and means for stopping the rotation of the shaft at positions determined selectively as a function of the reception in the printer of a combination of coded signals, comprising a collector or switching device, part of which is synchronized. rotated with the shaft. 19. A teletype printer as defined in claim 18, wherein said means mentioned as above. take a mechanism coupled with the rotary shaft to provide a number of angular stop positions corresponding to the representation of the characters and to operations of the printer, said selector mechanism comprising a device for frictionally driving said shaft, a wheel device comprising a multi-tooth stop wheel fixed to the shaft; a solenoid controlled ratchet device arranged to cooperate with the teeth of the stop wheel, whereby movement of the ratchet device engaging a tooth of the wheel causes the rotation of the wheel to stop. the tree; a collector or switching device disposed in the vicinity of said shaft, comprising a number of control circuits and a wedge arranged to rotate in synchronism with said shaft, means for introducing a predetermined signal adjusted in time with respect to the rotation of said shaft, in a selectively determined circuit <Desc / Clms Page number 175> among said control circuits, these control circuits being connected so as to act on said device actuated by solenoid, each control circuit corresponding to a particular combination of coded signals; whereby when the shaft is rotated to a position where said brush cooperates with said control circuit defined by said combination of coded signals, said solenoid controlled ratchet device acts on the stop wheel so as to stop the shaft in a position indicative of the character or operation represented by said combination of coded signals. 20. - Selector mechanism as defined in claim 19 in which said ratchet device controlled by. solenoid comprises at least two solenoids and two pawls, the stop wheel being in engagement with the ridges or edges of said pawls, these edges being arranged so that a pawl is in engagement with the teeth of said pawl. the stop wheel and stops the shaft in positions between the stop positions corresponding to the other pawl, whereby the number of distinct stop positions of said shaft is equal to the number of teeth of the stop wheel multiplied by the number of pawls. 21. - A selector mechanism as defined in claim 20 in which said collecting or switching device comprises a number of brush devices and a number of control circuits, a portion of said control circuits being conjugate with each solenoid and a brush device being conjugated with each portion of the control circuits. 22. - Selector mechanism as defined in the claim <Desc / Clms Page number 176> -tion 19, in which the wheel device comprises: said stop wheel and a cam wheel, the latter wheel having teeth will tilt in the direction opposite to that of the teeth of the stop wheel; and said ratchet device is subjected to an elastic action and comprises a stop ridge and a ridge forming a cam follower, the latter being urged to come into engagement with the teeth of said wheel forming a cam and to cooperate with this wheel in the manner of a pawl acting on a ratchet wheel, whereby the stop ridge is positively fined into a position where it engages the teeth of the stop wheel, if it is. retained in such a position, the teeth of the cam wheel and the stop wheel having such relative positions with respect to the pawl ridges that they allow removal due to the inaction of a spring from the ratchet ridge. pawl stop hore from one engagement position with the stop wheel before engaging the teeth of the stop wheel, and said solenoid maintains the pawl in its stop position determined by the cam each time it is energized. 23. - In the teleprinter defined in claim 18, in which the means mentioned and the rotary shaft comprise a selector mechanism in which: the rotary shaft is capable of assuming a number of angular positions of stopping representative of characters to be printed and of printing operations to be performed; means are provided for frictionally driving said rotary shaft; means cooperate with the said. rotating shaft, which makes printer operations possible; and means, comprising a rotary device rotating at the same speed as the rotary aroma, capable of stopping the rotation of said <Desc / Clms Page number 177> EMI177.1 tree .i: .n.-, one duelooa has several positions prd..9- T. <3r:,; i.-. ! # .- .: average beds being made aotifa for dos pct.iïlc-aa .nl.-ycs particulars of said bre îxtiitiî, ZiPl \; i5 îvcoptiOii a combinaiscRs ps? idlbêrainl s de siaau :: coded, par- ccôvj-atioa d1 said signals c0d, é V13C the position sngu- la! àa device rûïssi: L .2.} -! 'r ## jiiaëo.t âz u3j, -lsoi-iptcoî "fear the iaprésioa of a bankrupt, tôl -iaâ JJfi: 1: 1- to 1 i> ev- 3 iciicâtfiûE. 23, ddas. Leiuel un., 3 ï-ùiv:.; -. Cri'ûsrccres is aonrrie on the said shaft for in S-tiv- ± ôl? Âûir-o in rotation and to be able to slide axi: .1.5..n .: .. ;; u- raooort lui? Un arte-'é oseillaat d aâi> \; eau-iai- priaenr ..-... ai- = poe? Qrall.:. HereMa-s .. said wheel cyb-M p0J: .1: e'ja.a- rac-ser-iâs mt:.:, # cean-i-ipriaisaj. " es' ix.B on the-tree do rfesau-. m! pri .... '?, iiiliJàîre des ialacmeiltë oauluir-c âê. 3 last and uobiis j J.l-1 ,: .-xis by rassort 2oij it is oritm a cable c? i \ .n; .- i? . oîîi3 two strands S (: l11; it)! ", \. 11 (: 1: rG pavallellea ax called trees jt onV-ipt fcl6µ dre moved d, the D! -2;: the .. gî? 3ce 8; dpl -cc jn .; um ';: 010; the a; oyt = as 30i. planned for jiy sabi at j; .t c3nlj dos displ3c <;. nt -? .. nB.taj.rcs ..;. I. "" - "'1'o.' Un <3-3Ttin 'I;, jt1.Q uo uaulào h diclacei- si # mj.iïii # ens la rou-o had i .;! I" -; o- -5u i;, ïp-i ;;, onv> en synsiira -:: iic cl; oa poa, dm oStl '!'). V-mtrà in .i .. '! J-.ui: iapriasue; and ds itoysua Font pp.-K3 our d-3p,!. dOv?.: i> i <-s: (: j 10 -feu-; le iea? ci; -:> si so as to rfl.asn. ar la rcu i'drt.-c.3ncT '%; M et Is aiateu irapriaour du prûmior oot "25 - ID'.)! 'ili1'3nl" ds ieàlùas? ipt ur as defined by r.-.- cJi.ea-G.iû :: 4if in which dâa moy?. ': s s-oat fiséa to said tree?, - otative; da aanierô to be integral in rotation, and daùtr-s means Buat fixed to the shaft of the printer jaarteaa, for zn \ ïiv <3 '.; c do ..pl-nt. : .m, uli3.rs, these Aryans <Desc / Clms Page number 178> being adapted to cooperate with each other .The Hueras in. commencement of each printing operation to provide a device preventing the completion of a printing operation when said rotary shaft is in a predetermined angular position. 26.- Positive-action clutch intended to be used in the device provided for initiating the rotation of the shaft of the teletype printer defined in claim 18, this clutch being characterized by: coaxial respectively driving elements and trained; a set of devices cooperating with these elements, arranged in diametrically opposed positions adjacent to said elements; means for the pivotal mounting of each device at one of these ends in diametrically opposed positions on the driven element; a resilient member mounted between the pivoted end of each device and the other end of the other device for biasing said devices into a position where they are in engagement with the driving member; a part cooperating with the pivoting mounting means with a view to limited coaxial movement with respect to the driven element and comprising guide means cooperating with the other ends of the devices to tilt said devices into a position where they cease to be in engagement with the driving element, against the action of the elastic members, during the rotation of said part with respect to the driven element; and means for rotating said part relative to the driven element. 27.- Drive mechanism comprising a rotary selection shaft and means for causing rotation of the shaft; characterized in that means are provided, comprising a collector or switch, these means comprising a synchronous part. <Desc / Clms Page number 179> rotated with said shaft to stop rotation of the shaft in positions determined selectively as a function of the reception of a coded signal in a control circuit of said collector or switch, completed by the angular position of said rotating part. 28.- Selector mechanism as defined in claim 27 in which said rotating part is a brush which is solid in rotation with the shaft; the collector or switch co-operates with said brush and comprises a certain number of contact segments arranged in a group adapted to be successively connected as by a bridge by said brush, when the latter turns, a certain number of terminals, in number less than that of contact segments, each terminal being connected to contact segments the number of which is less than the total number of contact segments; Matrix control circuit is provided to receive a coded combination of simultaneous signals, to apply a voltage source to certain terminals selectively determined among said terminals and comprising means for stopping said rotary shaft in a position where said brush establishes a bridge between the contact segments connected with said selectively determined terminals, thus completing the circuit for the voltage source. 29.- Selector mechanism as defined in claim 28 in which said collector or switch comprises a plate on which are printed collector or switching segments and circuits, connected to said terminals