US1498140A - Telegraphic receiving apparatus - Google Patents

Description

June 17 1924.

E. A. WILLSON TELEGRAPHIC RECEIViNG APPARATUS Filed July 19. 1920 4 Sheets-Sheet 1 June 17 1924.

E. A. WILLSON TELEGRAPHIC RECEIVING APPARATUS Filed July 19. 1920 4 Sheets-$heet 2 E. A. WILLSON TELEGRAPHIC RECEIVING APPARATUS June 17 1 924.

4 Sheets-Sheet 5 Filed July 19. 1920 June 17 1924' E. A. WILLSON TELEGRAPHIC RECEIVING APPARATUS Filed July 19 1920 4 Sheets-Sheet 4 Patented June 17, 1924.

UNITED, STATES 'ETHEIJRED' ALFRED PATENT 1 OFFICE.

WILL SO N, OF (lRO'YiDON, ENGLAND, ASSIGNOIt TO CREEDK& -COM- PANY, 'LIMITED, CROYI DON, ENGLAND. I J i TELEGRAPHIc anceivrne APPARATUS,

Application fiieaaui s. 1920. Serial No. 397,229.

(GRANTED UNDER THE riiovisioivs or THE new or Manon 3,1921, 41 s'm'r. I.., 1313. p

T '0 all whom it may 00mm.-

Be it known] that I, ETHELRED ALFRED WILL'soN, a subject of; the King of Great Britain and Ireland, residing at Croydon, county of Surrey, England, have invented Improvements in or Connected with Telegraphic Receiving Apparatus for which I have filed applications in Great Britain,

Jan. 7, 1918, No. 379; in France, July 3, 1920,

518,81 in Canada, July 16, 1920, 2%,188;

in Denmark,'Aug. 4, 1920, 2,458; in Sweden,:

June 28, 1920, 3,245; in Spain, July 2, 1920, 74,355; in Italy, July 8, 1920, 89,302; in Bel 'gium, July 1, 1920, 230,710; in Holland, Aug. 9, 1920, 16,021), of which the following is a specification;

This invention relates to telegraphic re ceiving apparatus for perforating a tape in accordance with electriccurrents or impulses received over a line wire in automatic Wheatstone telegraphic systems and has for its primary object to provide improved apparatus which reproduces at the receiving end'of a circuit an exact perforated tape replica of that which is run through the transmit: ting apparatus at the sending end of the circuit.

Another object of the invention is to pro# vide receiving apparatus in which the use of costly and intricate air pressure plant and mechanism for operating the tape punches is obviated. I

Still another object is to provide receiving apparatus capableot operating at a high speed, for instance at the rate of about 80150 words per minute or even more.

It has heretofore been proposed to provide apparatus for producing a perforated tape in accordance with electric'cui'rents or impulses received over a line wire, said apparatus comprising two or three independently operating sets of mechanism controlled by two polarized relays one responsive to negative and the other to positive currents one set for operating a dot punch,a second for actuating a dash punch, and the'third'if such is provided, a space-punch, and each set comprising a spindle section continuously rotated at a constant speed by an electric motor,a spring-pressed spindle sectionziligning with the rotary spindle section andino-rmally held stationary, a ratchet wheel or other toothed or notched clutch fitted between the two spindle sections and controlled by an electromagnet and a cam on the normally stationary spindle section "and adapted to operate the respective punch through a plunger and a pivoted striker. v

The apparatus provided by the present invention embodies an improved construction combination arrangement and mode of operation of its parts, and comprises a single key lever or through polarized relay provided with a member adapted to oscillate in response to the electrlc currents orimpulses received over the line, a train of escapement devices and cams, one of which escapement devices directly and mechanically co-operates with the oscil- 'latory member, and punch-operating devices which operate dot and dash punches of a receiving tape punching machine, the arrangement being such that each time the relay member oscillates to one side or the other all of the escapement devices and cams are momentarily released, and the cams mechanically driven a certain amount, successively and step by step, that is, in a train one after the other, the last cam directly actuating one of the punch-operating devices, and the small 'niovementsof the relay member being 'multiplied step by step through all of the escapement devices and cams to the larger and stronger movements necessary for operating the punches.

The invention will now be described with reference to the accompanying drawings, in

and intermediate release mechanisms re moved;

Figures 3 and 4 are plans 'of'the'rel'ay and intermediate "release mechanisms, respectively the bell crank levers and their connecting links are shown in their intermediate positions in order to enable their construction to be the better illustrated and understood upon reference to such drawings.

In the construction shown three, that is, relay, intermediate and punching, spindles are mounted above one another on two platforms 6 and a base plate 7 and gearedtogether by toothed wheels 8, 9 and 10,-and each spindle is formed of two aligning sections 1l11, 1212, 13-13, adapted to be connected to one another by co-operating friction clutch discs 141 P, 1515 ,.and 1616 secured on their adjacent ends. One section 11, 12 and 13 of each spindle carries or is associated with an escapement hereinafter described and a cam 17, 18 and 19, and

the other section 11 12 and 13 carries one of the gear wheels 8, 9, and 10, and has its free end supported in a bearing and engaged by an adjustable bearing screw 20, 20, 20. Additional gear Wheels 21, Fig. 2, form a train with the gear wheel 10, and oneo-f the said additional wheels is connected to a shunt wound electric motor, of about {gth H. P. such as by a flexible coupling and a spindle 22, and other is connected to a shaft 23 which drives a stub shaft 24 through worm gearing 25, said stub shaft being provided with a fly wheel 26 and with a clutch device 27 or other means for driving the spindle 28 of the paper or other tape 29, said spindle forming part of a receiving tape punching mechanism such as of a Creed punch block, and serving to feed the tape between the die-plates and past the punches of said mechanism. By these means the spindle sections 11, 12 and 13 the clutch discs 14*, 15 and 16*- on these sections, and the tape operating mechanism 21 to 28 are driven continuously at a. predetermined constant speed from the electric motor, the speed being controlled by the adjustment of a rheostat connected in circuit with the field ,winding of the motor or by a suitable form of governor. Normally the other sections 11, 12 and 13 of the spindles and the clutch discs 14, 15, and 16, and the cams 17, 18 and 19 carried thereby are held against rotation by the escapementmechanisms until released in the manner hereinafter described. The clutch discs 14, 15, and 16 on the normally stationary spindle sections 11, 12 and 13 are constantly pressed against leather or other rings 30, fixed to their co-acting clutch discs 1 1 15 and 16 on the continuously rotating spindle sections 11, 12 a d y means f adjustable springs 31, 32 and 33, the springs 31 and 32 bearing against the ends of their respective spindle sections 11 and 12, whilst the spring 33 is attached to a pivoted lever 34, Figures 1 and 2 having a collar 35 which bears against the corresponding clutch disc 16 on the spindle section 13. The pressure of the springs'31, 32, and 33, isso adjusted that it is just suiiicient to cause the respective spindle sections 11, 12 and 13, and the cams, 17, 18 and 19, to turn smartly when said spindle sections are released, the power required to' do the work allotted to each completespindle being taken automatically in the manner described hereinafter. The

apparatus is electrically controlled direct from the line signals by an ordinary post office or other suitable polarized relay 36, Fig.3 which latter has its electrical contacts replaced by a light steel tongue 37 adapted,

to oscillate in response to the signal currents,

between two adjustable stop screws .not

shown. Thefreeend of the relay tongue 37 co-operates with two staggered radial arms 38 secured on the normally stationary section 11 of the upper spindle 11 11 thus forming the first or relay escapement mechanism, and the adjustment, sizes and shapes OEfjthG tongue and arms in relation to one another are such that said arms can make onlymo ne,

half revolution upon each movement or beat staggered in the direction of travel of the tape in suchwise that in the case of a dot there is a dwell after actuation of one punch just suflicient to cause the second punch to produce a perforation at the sameposition in the length of the tape, the two perforations being at opposite sides of the customary centre line of feed perfarations, The production of perforations representing a dash is effected by the first punchiin the sameway as for a dot but the dwell in this case is increased so thatthe second punch produces a companion perforation which is not in the same position inrthe length of the tape but coincides with the next feedperforation. It will thus be understood. that as the complete operation of thrusting and releasing-the punches occupies only about the300th part of a second, the time during which the feed wheel and tape are arrested ispractically negligible and theditference between dots and dashes in the tape depends entirely therefore upon the time interval between successive spacing and marking con tacts durin which the tape is allowed to run on. ,ven between the marking and l it.)

spacing-1 currents for a dot", there: is an appreciable; interval 1 durin'giwhich the slip has travelled a little. The right-hand punch and the v corresponding c'orrector wheel are given alead so that although the: spacing punch is actuated later, the spacing perforation appears opposite the same centre hole as" the marking perforation. The operation is thus as follows :A movement of the relay tongue 37 to one side under the influence ofa received signal current causes it to" release one of the first escapement arms 38011 the upper spindle section 11,'so that the latter turns "through half a revolution until? the other arm contacts'with and is stopped the tongue. Thecanr 17, Fig mesa; 3 andf6', onxthespindle section 11 en gages and presses-back an arm' of one of two opposed- -bell-crank' levers39, 39 pivoted ona stationary support" 40' secured on the upper platform 6, the other arms of which levers are 'conn'ected' b y a" link e1 and I by a pin and hole joint 42 to the upper end of a vertical lever 43 pivoted at 44, Figures 1 and tithe lower end of saidwle'veror rod be ing' forked and engaged with a stud -45 on i a plate 46 forming part of L the second or intermediate' escap'ement' mechanism and slid ably mounted in the recessed-rear fa'ce'of a stationary} support 47, The movement of the bell crank lever 39 by the cam 17 pushes the plate 46110'9116 side, and-this action is caused to besmartand decisive by the medi umpf'a roller 48 carried'by-a spring 49ccopera'ting with a projection 50 carried" by the pivotpin o'fthe vertical leverfl43. Thus the lever e3 and the plate 46' operated thereby cannotcometo rest atiany intermediate position but once the projection 50 passes the-"neutrallinesaid lever and plate must, through the action of the spring roller 48', jump to one side or theother according to theoperatio'n and position ofthecam 17 1 Two catch plungers 51, 51 are slidably and longitudinally mountedin the support 47 and are connected to lugs52formed on plates 53, F 4 securedQadjustably: if desired, tothe plate 46, andsaid lugsslide in slots formed in 'the said'supp'ort The move ment of the second escapement plate 46 causes one ofthecatche's 51 to release an arm 5 4se'curedto the spindle section 12 and engaging said catch sothat the said spindle section is allowed" to rotate through halfa revolution until said arm contacts with and i's'jstopped-by theother catch 51; The cam 18, Figs. 1- and 4" on=thespindlesection-12 engages and presses back an arm of one of two opposedibelhcrank --levers" '5-j=pivoted on the stationary lower platform? 6; theothei' arms of which leversare connected by a link" 57', Figs; 1, 4 and '5, carrying a'i pointed projection 58* which passes 'throughz-a' slot 59 formed in a dependingflever fifl pivoted at GI a IidhavingQitSlgfWer ehd'fiorkedWoem gage a stud 62" on -a..plate' 63v servingiaspjfirt of the thirdf or punching escapement mechanism and: sli'dably mounted in the recessed rear face of a stationary support 64a Twoca- tch plungers 65, 65 are slidably and. longitudinally mounted in thesupport 64 and: are connected tolugs 66 formed on discs'6'7 secured, adjustably if desired, to

the plate 63, and said lugs; slide in slots formedin the'said support."v The movement of'the bell crank lever by the cam 18' swings-the link57, depending vlever and plate 63 to one side, and theswinging action is rendered sudden by'any known or suitable devicefsuch as by means "of a roller 68'carried by a spring, 69" andco-operatin'gawith thepointedend of the'project-ion 58 on said link in-ainanner' and for a purposeasimilar to those, of the spring-1 roller 48 1 and pro jection 5O previouslyi'j described. The-swinging aside ofthe third escape} ment plate 63 caused one of" the catches to release an -arm"70 secured on the lower-or punching spindle "section 13, .so that the latter is' allowed'to' revolve through half a. revolution until said arm contact-switlr andfis stopped by'theoth'er catch ofthe plate. The cam 19 on the spindle section 13engageswith one of a pairof rollers 71, Figs.-2 and? carried by two hinged spring-returned striking: plates 72, thus pressing the respective plateforward. These strikingplates 7 2are adapted to operate the dot and dash punches 7 3 and the corrector-rods 74 ofthe receiving tape punching mechanism inchc'ated' generally byi dot and dash line's75.

v When" the relay tongue 37 moves to {the other sideunder-theinfluence of a'succeeding signal current the-'escapement and cam mechanisms repeat'the operations ahoved'e scribed with the exception that themovements of the second and third escapement plates-46 and 63 will beiir reverse directions two striking plates 72' are ensured-'as will he appreciated,-by the c'o-operatio n of" the two arms 38 of-thefirst escapement withfl'the relay tongue '37 by the pairs of opposed" bell crank levers 39 and 55" co-operating with the first andsecondcams 17 and 18 andby the consequ'ential rotation of the three spindle sections 11, 12' and=13 each through half a -revolution' at a time in--turn.= Thus it will be understood that thesmall? and timed" side mov'ementsaofthe;- relayftoiigue 37 in: alternate directions-,3 under: the influence of positive and negativei'or-strongiantliq weak currents are exactly reproducedlinisteps to a multiplied degree -by"th'e: movements imparted5to':the'two'-' striking 0r punch-(Spa? ating plates: 72:,

but i The three cams 17, 18 and 19, are so shaped that the greater the resistance they have to overcome the harder are the discs 14 15 and 16 thrust against their companion rotating discs 14, 15 and 16 thus each spindle section 11, 12 and 13, automatically obtains the necessary power to do the work allotted to it.

The arms of the opposed bell'crank levers 39and' 55 which engage with the cams 17 and 18 have rollers 7 6 and 77 mounted on them to reduce friction. For the same reason the free end of'the tongue 37 moves on rollers not shewn. I I 1 Thestriking plates 72 are thrust forward by the cam 19 and returned by the springs 7 8 against the adjustable stops 79 so quickly that the time that the tape is held and punched is so short as to be negligible. action of the receiving tape punching mecha nism known as the Creed punch-block is well known and need not be detailed here. It will be sufiicient to say that the action and effect produced by the striking plates 72 is the same as that produced by the punch ham.- mers ofthe Creed receiver the instrument with which theGreed punch block is normally used. For an'understanding of the Creed punch block and receiver reference may be had to U. S. Patent No. 887,313;

The cam 19 is fitted on the back with a circumfe'rentially adjustable disc 80 upon which are two projections or cams 81 diametrically opposite to one another. These two projections 81 are so adjusted by turning the disc 80 that they contact with the adjustable screws 82 just before the arm 70 strikes and is stopped by one of the catches V '65 which action -momentarily relieves the pressure between the two discs 16 and 16". Thus the arm 70 strikes the catches while the power is temporarily removed from the spindle section 13 which action will tend to materially reduce the power required to operate the instrument as well as to minimize the wear and tear at this point.

The springs 31 and 69 are each adjusted by means of two set screws passing through slots therein and disposed one on each side of'the block 83 secured thereto and formed with opposed inclined faces, the spring 32 is carried by a pivot' pin upon which is secured an arm 84 against which presses an adjustable set screw 85 and the rear end of the spring is secured to a longitudinally moveable screw-threaded bolt 86 which is ad justed by two nuts 87. The plate 46 moves between two adjust-able stop screws 88 and the lever 60' between two similar screws 89.

If desired two instead of three sets of escapement and cam mechanisms, or more than three may be provided.

What I claim is 1. A telegraphic tape perforator of the kind herein referred to, comprising tape feeding mechanism, punches for forming rotary member and said driving means,-

holding meansassociated with each rotary member for normally holding the same stationary, against the action of its clutch, the holding means" associated with the first r0- tary member in the series being controlled by the movable member of the relay, the

holding means associated with the'second rotary member in the series being controlled by the actuating means onthe first rotary member and so on, the actuating means on the last rotary member being adapted when such member is released, to actuate the punch operating means, and the several clutches being of increasing power from that associated with the-first rotary member to that associated with the last1rotary member, substantially as described.

2. A telegraphic tapeperforator of the kind herein referred to,-. comprising tape feeding mechanism, two punches for forming signal holes in tape fed by said mechanism, means for actuating saidpunches in alternate order,- a'series of rotary members, a series of cams fixed to the respective rotary members, driving means designed con,- tinuously to rotate, a series of closed fric tion clutches between said driving means and rotary members, a single polarized relay having a member adapted'to be moved alternately in, opposite directions in response to, positive and negative impulses received over a telegraph line, and. a series of escape ment devices associated with the respective rotary members and each adapted normally to hold its respective shaft stationary, the first escapement device in the series being controlled by the said movable member of the relay and the next escapement device in the series being controlled by the cam on the preceding rotary member ofthe series, the first escapement being arranged to be released by the relay member when moved in either direction and its corresponding rotary member left free to berotated by its corresponding clutch device and its cam device then caused to release the escapement device of the next rotary cam carrying member in the series and. permit such member to be-rotated by its clutch device and so on, the cam device on the last rotary member being arranged, when rotated, to operate the punch actuating means. 7

3, A telegraphic tapeperforator 0f the kind herein referred fto,! comprising tape feeding mechanism, two punches for forming signal holes in tape fed by said mechaw friction clutch between each pair of driving and driven spindles, escapement mechanism associated with each driven spindle and normally holding said spindle stationary against the action of its clutch, the escapement mechanism associated with the first driven spindle being controlled by the relay member and being released at each movement of said member, and the escapement mechanism associated with each succeeding stationary spindle being controlled and actuated by the cam on the preceding driven spindle when this spindle is released by its escapement and driven by its clutch, ,the cam device on the last stationary spindle being adapted when such spindle is released by its escapement and driven by its clutch to operate the punch actuating mechanism, and the several cams being of increasing power from the first to the last in the series, substantially as described.

4. In a telegraphic tape perforator of the kind herein referred to, the combination with tape feeding mechanism, punches for forming signal holes in a tape fed by said mechanism, actuating means for said punches, and a single polarized relay having a member adapted to be moved alternately in opposite directions in response to positive and negative impulses received over a telegraph line associated with said relay, of series of driving spindles, a series of companion normally stationary driven spindles, each of the latter spindles being co-axial with a driving spindle, a closed friction clutch between the adjacent ends of each pair of driving and driven spindles and adapted to slip when the driven spindle is stationary, a cam fixed on each driven spindle, an escapement device associated with each driven spindle, that associated with the first driven spindle of the series thereof comprising two diametrically arranged arms fixed on the said first driven spindle and co-operating with themovable member of said relay so that said driven spindle can be rotated through half a revolution by its clutch each time the relay member moves from one position to another,

means arranged between the camwon each driven spindle and the escapement device associated with the next driven spindle in the series of driven spindles and adapted, when the first driven'spindle is released,"t'o be actuated by the cam thereon and to actu ate the escapementfto release the said next driven spindle, the successive clutches being of successively increasing power from that associated with the driven shaft first released by the action of the relay and the cam on the last shaft of the series being adapted, when its driven shaft is momentarily released by its escapement mechanism and driven by its clutch to "operate the punch actuating means. a

5. In a telegraphic tape perforator of the kind herein referred to, the combination with tape feeding mechanism, tapepunching mechanism and a single polarized relay having a member adapted to move alternately in opposite directions in response to positive and negative impulses, received over a telegraph line associated with said relay, of anumber of pairs of coaxial driving and driven spindles arranged parallel to one another, means for continuously rotating the driving spindles, a closed friction clutch between each pair of driving and driven spindles, a cam on each cam shaft, escapement means for normally holding each driven spindle stationary against the action of its clutch, the escapement means for the first driven spindle of the series being controlled by the movable relay member and that for each succeeding cam shaft being controlled from the cam on the preceding driven spindle, the several escapement means acting in succession to release the respective driven spindles and allow them to be rotated in succession through half a revolution each time the movable relay member moves from one position to another, the clutches being of increasing power from the first driven spindle to the last and the cam on the last driven spindle, when this spindle is released, acting to operate the tape punching mechanism.

6. In a telegraphic tape perforator of the kind herein referred to, the combination with tape feeding mechanism, tape punching mechanism and a single polarized relay having a member adapted to move alternately inopposite directions in response to positive and negative impulses received over a telegraph line associated with the relay, of a plurality of pairs of driving and driven members, a closed friction clutch between the driving and driven members of each pair thereof, an escapement on the first driven member adapted to be momentarily released at each movement of the said movable member of the relay and permit said spindle to be driven by its clutch, means arranged between the said several driven members, adapted, when the first driven several clutches being of, increasing power member is released, to release succeeding from that of the first driven member to the driven members in succession and permit last one. 1 them to be rotated by their clutches and Signed at London, England, this 22nd 5 means on the, last driven member adapted, dayof June, 1920.

when this member is released and rotated,

to, actuate the tape punching mechanism, the ETHELRED ALFRED WILLSON.

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