US1374606A - Printing telegraphy - Google Patents

Description

H, PFANNENSTIEHL.

PRINTING TELEGRAPHY APPLICATION FILED JUNE 8- I917.

Patented Apr. 12, 1921.

4 SHEETS-*SHEET 1.

H. PFANNENSTIEHL.

PRINTING TELEGRAPHY.

APPLICATION I'ILEI) JUNE 8.1917.

4 SHEEIS SHEET 2.

Patented. Apr. 12 1921.

H. PFANNENSTIEHL.

PRINTING TELEGRAPHY.

APPLICATION FILED JUNE 8, 1917 1,374,606. Patented Apr. 12, 1921.

4 SHEETSSHEET 3.

H. PFANNENSTIEHL.

PRINTING TELEGRAPHY.

APPLICATION FILED IUNE 8.1917.

1,374,606. I Patented Apr. 12, 1921.

4 SHEETS--SHEET 4.

UNITED STAIEES- PATENT orr es.

HARRY PFANNENSTIEHL, OF EAST ORANGE, NEW JERSEY, ASSIGNOR TO WESTERN ELECTRIC COMPANY, INCORPORATED, OF NEW YORK, N. Y., A CORPORATION OF NEW YORK.

' rnmrme TELEGRAPHY.

Patented. Apr. 12, 1921.

Application fiIed June 8, 1917. Serial No. 173,546

To aZZ'w ham it concern Be it known that I, HARRY PFANNEN- STIEHL, a citizen of the United States, residing at East Orange, in, the county of Essex and State of New Jerse have invented certain new and usefu Improvements in Printing Telegraphy, of WhlCh the following is a full, clear, concise, and exact ii rdesclflptio This invention relates to printing telegraphy and more particularly to an improved type of printing telegraph receiving apparatus wherein the printing of characters and various other operations are performed by power-driven mechanism controlled by line current impulses.

One of the principal objects of this invention is to provide a' telegraph receiver of the above class wherein all the necessary functions are performed in a reliable and efiicient manner at a high rate of speed.

Another object isthe provision of means whereby the printing of one character may be effected simultaneously with theselection of'the next succeeding character.

A further object is to provide a receiving printer of the above class, suitable for printing messages in page form and one which is capable of providing a plurality of duplicate coples.

A still further object is the provision-of means whereby the power .mechanism for operating the printer may operate intermittently and only when signaling impulses are being received.

To the above ends, means are provided for vention disclosed in the accompanying draw- I the printer.

ings embodies a telegraph receiving printer comprising stationary selecting mechanism, a,stationary paper platen, and printing elements adapted to be moved transversely of The printing mechanism disclosed is of standard typewriter constructioniand, in fact, the invention is applicable to any suitable typewriting mechanism of thetype bar sort.

impulses. The various mechanical opera-v tions of the printer are performed by 'a battery of rotating cams cooperating with bell crank levers or suitable operative members to effect the desired operation. The cam members are mounted on a rotatable shaft to which power may be imparted by means of a motor, or any'suitable driving mechanism. One of the essential features of this invention is the timing of the various operations performed by the rotating cams.

. The selecting mechanism consists of a plurality'of stationary selecting-magnets and 'a corresponding number of horizontal selecting ars controlled by said magnets. The selecting bars extend entirely acrossthe printer and are adapted 'to be raised and lowered but are not arranged to be moved endwise. y A

A'plurality of notched code bars or permutation bars are provided, and the arran'gement of these bars, with respect to the selecting bars, is such that When any combination is set up by the selecting magnets only one of ChGEOdQ bars will be permitted to move. forward and mesh with the selectifig bars. Each of the code bars controls a pull bar which is adapted to be moved for ward by a code bar, when selected, into the path of a reciprocating printing bar, which printing baris preferably controlled by the rotating cam shaft. When a ull bar is moved forward and engaged by t e printing bar, atype face carried by the selected type lever is thrust, against the paper platen and the selected character printed. The selecting and printing operations are so timed that, while one character-is being printed, the next succeeding character may be select; ed so that there is no time lost between the. selecting and printing operations.

The above and other features of this invention will be fully set forth in the following description and claims will be more readily understood by reference to the accompanying drawings, in; whichFigure 1.

is a perspective view of the mechanism as assembled, with certain parts broken away to more clearly show the cooperation between the selecting mechanism and the movable type carriage, and between the various stationary and movable parts; Fig. 2 is a vertical sectional view taken just to the right of the center of Fig. 1 with the movable type carriage in the center; Fig. 3 is a vertical sectional view through the special selecting mechanism at the left-hand side of Fig. 1; Fig. 4 is a plan view of a portion of the selectin mechanism shown in the front of Fig. 1; ig. 5 is a detail view of the driving and brake mechanism; Fig. 6 is a vertical sectional view on line 66 of Fig. 5; and Fig. 7 is a detail view of a one-way clutch taken on line 77, Fig. 5.

The mechanism herein disclosed is operping and holding the shaft against rotation, 4

the cam surface being so, shaped as to bring the shaft to a positive stop without shock or jar to the operating parts. For releasing the cam shaft to start the printer in action,- a

1 starting magnet is provided for operating a trip, comprising a toggle-joint and a series of levers which provide slack in the brakeband and permit the shaft to make one complete revolution when it is again gripped by the band and held until the starting magnet is again energized.

Referring to the drawings, and particularly to Fig. 1, the invention is illustrated in" combination with a type carriage of a form so well known as to require no detailed dezg atednpreferabl bv various onibinationyof'scriptionT The"typecarriage 10 carrying five positive and negative selecting impulses, with an additional impulse following each group of selecting impulses for starting the mechanism in operation. The impulses may arrive over a line from a distant station and may be distributed to the selecting and starting magnets by means of a Baudot distributer, or any other of the well known distributing systems.

In order to simplify the drawings a considerable portion of the'frame structure has been omitted. Also various springs, which would normally be used for restoring various operating parts to normal, have been omitted so as to avoid complicating the drawings. It is to be understood, however, that suitable supporting means may be provided for the selecting and driving mechanism and that springs may be provided wherever necessary for assisting in the operation of parts or restoring the various parts to normal.

In the construction of the'printer, the preferred embodiment of which'is disclosed in the accompany'ingdrawings, some very radical departures have been made from typebar printers heretofore developed. In the accompanying drawings is shown a stationary paper platen, a movable type carriage,

and means for selectively operating the desired type carried by the movable type car- V riage.

The movable type carriage, including the type levers, bell crank levers, code bars, universal printing bar, etc.,v is adapted .to be moved from left to right, transversely of the machine against the tension ofa spring, onecharacter spacev for each revolution of thecam shaft, and is adapted to be released, and returned to its initial position bythe said spring, for commencing a new line. The cam shaft, which performs all the impulses for selecting the character D, and

mechanical operations, is constantly under spring tension, tending to rotate. Power for rotating the shaft is stored up in a spring by means of a motor, thev circuit for which is thetype bars, connectinglinks, code bars,

etc., is supported by a portion of the frame 12 and rotatable shaft 14.

The selecting mechanism consists of five selecting magnets 15, 16, 17 18 and 19 (only four of which are shown in Fig. 1), five horizontal selecting bars 20, 21, 22, 23 and 24 extending entirely across the printer at right angles to the code bars, and five latches 25, 26, 27, 28 and 29 extending from the armatures of the selecting magnets, to the selecting 'bars. The selecting bars are normally held in the position shown by the latches 25 (.0129 inclusive, and the notched members 11, *and when released and permitted to drop they are held in their lowered positions by means of springs 13, until rearmature 31 and locking members 32. The

operation of this mechanism will be described later. It may be stated here, however, that the'overlap magnet and a starting magnet 33, which may be connected either in-series or in parallel, are operated by a sixth impulse, or an impulse following the five selecting impulses. Or they may be connected in independent circuits and the overlap magnet may be controlled. by a contact actuated by a cam on the cam shaft.

may be obtained from a description of-a particular type selection and the various opera tions incident thereto.

Assume that the sending apparatus at a distant station is transmitting a series of further assume that'thecharacter D is selected by five impulses combined in the following order: posltlve, negative, negative,-

positive, negative. 'Letus also assume thatat the receiving station there is a polarized line relay which responds to only positive impulses, and which controls-the energizing circuits of the selecting magnets 15, 16, 17,

18 and 19. Then since the first and fourth impulses are of positive polarity current will be supplied to the selecting magnets and 18, and since the second, third and fifth impulses are of negative polarity no current will be supplied to selecting magnets 16, 17 and 19. Consequently only selecting magnets 15 and 18 are energized. Selectmg magnets 15 and 18 when energized attract their armatures and withdraw their respective latches and 28 from engagement with the corresponding selecting bars 20 and 23. The selecting bars 20 and 23,

however, do not fall the instant the latches are withdrawn because thebars are supported by the members 1111 which are con trolled by the power-driven cam shaft. The five selecting impulses have now been received, the selecting magnets 15 and 18 have been energized and selecting bars 20 and 23 have been conditioned for action awaiting receipt of the sixth vor starting impulse.

The sixth impulse effects the energization of the overlap magnet 30 and the starting mag; net 33. The ener ization of the starting magnet 33 causes t e release of the brakeband 34 (which action will be more fully described hereinafter), and permits the cam shaft 48- to start rotating. The instant after the cam shaft'starts to rotate in the direction of the arrow (Fig; 3), the vertical plungers 35-35 are permitted to rise, due

A to the shape of the cam surfaces 3636 and the springs connected to the rockable arms 37 37, and, consequently the members 1111- responding to the movement of the rockable arms 37-37, are pulled down by suitable springs until the extensions 38-38, carried thereby, engage the adjustable stops 3939. Since only the selecting bars 20 and 23 have been conditioned for movement by the withdrawal of the latches only these bars will be permitted to follow the downward movement of the notched members 11 -11, the extent of their downward movement being determined by the stops 3939.

Theselecting bars have now been arranged to permit one and only one of the code bars 1 to counteract -alnd overcome springs 44.

40 to move forward, when released, astride the selecting bars. The code bars 40 are normally held in the position shown by the universal bar 41, which extends entirely across the type carriage in front of the extensions42, carried by the bars 40, the forward pull of the springs 43 being insufiicient the pull I of The universal bar 41 and the printerbar 45 are moved out of their normal positions by means of a striker bar 46, which i bell cran shown, by suitable springs; On each of the bracket arms 49 and 50 is secured an adjustable member 52, one of which is clearly shown in Fig. 2. On the supporting rod 51 and adjacent each of the bracket arms 49 and 50-is pivotally mounted an arm 53, which arms are adapted to be engaged and operated by the cams 47.47. Each'of the arms 53 carries a member 54 which is normally held in engagement with its corresponding adjustable member 52, by a spring 55,. but'may be held away from themembers 52 for certain purposes as will presently ap ear. I

t will be seen by reference particularly to Fi 1 and 2 that when the cam surfaces 474 force the arms 5353 forward, the

l striker bar 46 will be forced downward and on the extensions 56 and 57 of by actin levers 58 and arms 59, the unitwo bracket arms 49 and 50,

versal bar 41 will be moved forward'and the printing bar 45 will be moved upward. All of the code bars are normally held clear of the selecting bars by the universal bar 41 and when the universal bar is moved forward all of the code bars due to the action of the springs43, will also move forward slightly, but only the selected code bar will be permittedto move forward astride the selectin bars. As the selected code bar moves orward the extension 60 thereof en-' gages a pin 61 'on the corresponding pull bar 62 and moves'its respectivepull bar into the path of the reciprocating printing bar 45, so' that on its downward stroke the printing bar strikes the end of the selected pull bar 62, and by means of a 'lever 63 connecting each of the pull bars with itscorresponding t pe bar 65 the desired type is thrust against t e paper platen in a well-known manner.

By reference to Fig.2 it will be readily--' understood that in view of the pitch of cams 4747 and the high rate of speed of the cam shaft, which speed may be assumed to be at least 600 R. P. M., the downward movement of the striker bar 46 is very rapid and consequently the forward and upward movements of the bars 41 and 45 resp'ec tively, are equally rapid. By a proper 'selection of, springs144 and 64 these bars may be returned to normal with equal rapidity and, in fact, it isdesirable that the springs 64 ,be of such stren ,h, that the printing bar will strike the se ected'pull-bar with such force that the pull bar will travel ahead and disengage itself from the printing bar and permit thesprings 66 to return the actuated pull bar to normal position as the paper platen with sufficient force for manifolding and may also be sufiicient to cause the type bar to return to normal due to rebound, or the return action of the type bar may be increased by providing aspring, such as 67, connected to each of the connectin links 63.

he function of the code bars is to move the pull bar, corresponding to the character selected, into the path of the reciprocating printing bar 45., Therefore, as soon as a particular pull bar'has been engaged by the printing bar, the selected code bar should be withdrawn so that the selecting bars may be restored and a new selection set up. The springs 44 should, therefore, be of such strength as to restore the universal bar 41 the instant the printing bar engages the selected pull bar. Immediately after the selected code bar is withdrawn by the univer sal bar 41, the cams 36-36, acting upon the plungers 35-35, rock the members 3737 and raise the members 1111 to restore the selecting bars to normal, ready for a new selection.

Spacing.

Spacing between characters is effected by the cam shaft, and in the embodiment disclosed, the type carriage is moved forward one step, or one character space, immediately after each character is printed. ,A

pivotally mounted rod 75 is provided which may be j ournaled in the frame of the printer or supported in any suitable manner. Rigidly secured to the rod 75 are two bracket arms '76 (only one of which is clearly shown), which carry the rack 77. To the free end of the operating lever 78 is connected an arm 79 on the end of which is a pawl 80, adapted to engage the teeth of the on and cooperating with the rack 77, the

' type carriage 10 is moved to the right one step, or one character space, for each revolut1on of the cam shaft.

The spac ng mechanism is so arranged that the type carriage will be stepped ahead immediately after a character is printed, although obviously, spacing may be effected, if desired, before theprinting of each character. v

Wish it is desired tospace between words,

the spacing is effected in the manner above described, but the selecting mechanism is not actuated to permit printing of a character, that 1s, the first five selecting impulses are such that no code bar is selected and consequently no pull bar will be permitted to move into the path of the reciprocating printing bar.

Visible typewriting.

The cam 82, in addition to controlling the spacingbetween characters and words, also controls the position of the inking ribbon 85 which is normally in the position shown in Fig. 1. When the arm 79 is moved forward, as already explained, the extension 86 engages the crank arm 87 As will be clearly understood by reference to Figs. 1 and 3, the rotation of the rod 88 and bracket arms 89 and 90 acting upon the pins 91 and 92 cause the ribbon 85 to be moved in front of the type bar 'ust as it strikes against the paper platen. he springs 93 and 94, acting on the pins 91 and 92, serve to hold the ribbon down from in front of the printed characters so that they are visible at all times except at the instant a character is printed.

Any suitable ribbon feeding mechanism may be provided for feeding the ribbon transversely of'the machine.

Overlap arrangement.

As already stated, the overlap magnet 30 may always be operated by an impulse following the five selecting impulses. The function ofthe overlap magnet, together with the locking mechanism is to make possible the selection of a new character while the preceding character selected is being printed. Each of the latches 25 to 29 inclusive, is provided with an extension. 68, (Fig. 4) so placed that when a selecting magnet is energized to withdraw its respective latch from under its corresponding selecting bar the extension 68 will be engaged by a' stop 69, carried by each of the members 32, and the latches corresponding to the actuated selecting magnets will be held in their moved positions until the magnet 30 attracts its armature 31 and withdraws the stop 69 from engagement with the extensions 68 on the moved latches. As soon as the latches are unlocked by the actuation of magnet 30 they will be returned by the action of springs 70, connected to the armatures of the selecting magnets, until the bent-over portions 71 (Fig. 2) abut against the selected bars, in which position the latches will be held untilthe selected .bars are restored to normal, thereby per 'mitting the latches to move 1n under the ceeding selection coming before the selected bars are restored, utilizes one or more posi spective magnets, and will be locked in their actuated positions until the .overlap magnet 1s again energized. The operation of magnet 30 should take place, preferably,

' immediately after the selected bars are actuadapted to be held against rotation b means ated so that the released latches may abut against the selected bars and be in position to respond to the next selection, if required, or to move under the bars the instant they are restored to normal, if they are not required for the next selection. By means of this arrangement a new selection may be set up while the preceding character selected is being printed. Thus, it will be seen that the function of the. latches and overlap magnet is two-fold,first, by locking the latches in their actuated position until the selected bars are lowered, by the action of the cam shaft, they are thereby prevented from returning and interfering with the downward movement. of the selected bars; and, secondly, by releasing the latches as soon as the selected bars are lowered, they are placed in readiness to move in under the selected bars the instant they are restored, or they may again be selected and locked up without moving under the'bars, providing the succeeding group of selecting impulses has positive impulses in common with those of the preceding group. This feature when combined with a type-bar printer which has an inherent overlap in itself, permits an exceptionally high rate of speed to be attained, much higher in fact than can be attained with a printer of the type-wheel sort.

l I l l I Dm/v'mg mechamsm.

Referring to Figs. 5, 6 and 7, the cam shaft 48 is normally tendlng to rotate under the action of a driving spring 95, but 1s of a brake-band 34, the tension 0 which is controlled by a starting magnet 33, and a series of levers. When the starting magnet 33 is energized by the sixth or startin impulse it attracts its armature 96 and moves the toggle-joint 97 in the direction of the arrow A about the pivotal point 98. This causes the lever 99, which is bifurcated at one end, to move in the direction of arrow B about the fulcrum points 100 which rest against the cam surfaces 110 and 111,

and consequently loosens the brake-band 34, thereby permitting the cam shaft 48 to 1'0- tate and perform its functions. The 'cam shaft, in addition to performing the various operations incident to selecting and print-1 ing, which have already-been described, also controls means for storing up power in the dI'lVlng spring 95 and cooperates with su t,

, able mechanism for overcoming the power of the drrvnig spring to bring the shaft torest.

' Fig. 5 is shown the motor 101, driving shaft and pinion 103 carried thereby, cooperating with the gear 104 for winding up the spring 95. On the shaft 48 is a key '105 cooperatin with a nut 106 threaded on a sleeve 107. ontacts 108 and 109 control the series field of the motor 101 and are adapted to be closed upon the rotation of the cam shaft, by the movement of the traveling nut 106 toward the key 105. As soon as these contacts are closed the circuit through thejmotor will be completed,'and the motor w1ll start and again wind up the spring 95 a predetermined amount, ready for-thenext revolution of the cam shaft. The actlon of the motor on the gear 104 and sleeve 107 causes the nut 106 to travel in the opposite direction or away from the key 105 andopen the circuit of the motor bybreaking of contacts 108 and 109. Thus it will be seen that power is automatically and intermittently stored up in the spring 95 for operating the cam shaft'48.'

When the field circuit of the motor 101 is closed the shaft 102 rotates in the direction of the arrow and stores up ,energy in the spring 95. To prevent the spring 95 from rotating the shaft 102 in the opposite direction when the field circuit of the motor is open a one-way clutch (Fig. 7) is provided. The clutch comprises balls or rollers 175 which are held in the position shown by yielding springs 176. The rollers 175 permit the motor shaft 102 to rotate in the direction of the arrow and prevent the shaft from rotating in the opposite direction due to the friction set up between the rollers and the shaft and between the' rollers and frame 177.

When the lever 99 starts moving in the 114. Now as'the cam shaft continues to rotate and the bifurcated end of lever 99 rides up on the cam surfaces 110 and-111- it will readily be seen that the lever 99 will be rotated about the pivotal pointv 114 and the brake-band 34 will be caused to grip the drum 115 .and stop the rotation of the camshaft 48. a

If desired, a strip of felt, canvas or. any

suitable mate ial may be placed between the ciprocating member 135 carried by a bell crank lever 136, which is operated by a cam brake-band and drum 115 to reduce slippage and insure positive action of the brake-band.

AumiZz'a/r-y selections.

In addition to selecting and printing various characters and providing means for spacing between characters and words, as hereinbefore described, "there are various mechanical operations to. be performed, such, for example as carria e return, 'line spaclng or paper feed, shit and unshift (that is shifting from lower case to upper and vice versa), automatic signaling, etc.

To the left-hand side of Fig. 1 is shown a plurality of special code bars 121, 122, 123,-

124 and 125, which are similar to the code bars 40 mounted on the movable type car- Type carriage return. Mention "has already been made of the manner in which the-t pe carriage is moved from left to right step y step for line print-i ing. When it is desired to return the type carriage to the left to commence a new line a group of'impulses is sent over the lineto cause the selecting mechanism to select the special code bar 125, which group of selecting impulses is followed by a sixth or starting impulse as usual, for releasing the cam shaft." Now when the cam shaft starts rotating, the cam 128 acting upon the bell crank lever 129 will force the auxiliary striker bar 130 (which bar corresponds to the main striker bar 46) down againstthe action of suitable springs (not shown). The bar 130 acting upon the bell crank levers 131 and 132-will move the auxiliary universal bar 133 (which bar corresponds to the main universal bar 41) forward and per mit the selected special code bar 125 to move forward astride the selecting bars 20 to 24 incluslve. As the bar 125 moves forward under the action of suitable springs it moves a pull bar 134 forward in the path of a reon the cam shaft 48. The pull bar 134 is connected to the rack 77 and when the rack is pulled down by the action of the pull bar, the rack is disconnected from the worm wheel 84 and is temporarily locked down by pletely returned by the action of a suitable I spring'and tape 141, whereupon, the member 142 carried by the type carriage engages the disk 138, forcing it back against the ac tion of spring 139, thereby permitting the rack 7 7 to return to normal and engage the worm-wheel 184.

It is preferable that, when the type carriage is being returned ready for commencing a new line, there shall be no unnecessary friction between the stationary and movable parts. Therefore, it is desirable that means be provided to prevent operation of the striker bar 46 while the type carriage is being returned. Thisis accomplished by providin -two arms 190 rigidly secured to the rod 75, so that, when the rack 77 is depressed and the rod rotated, the arms 190 will act upon the members 54 andhold them out of engagement with the members 52, thereby preventing actuation of the striker bar 46 until the type carriage has been returned and the rack 77 has been released.

Line feed. 7

"filgEor-g the purpose of. rotating the paper pl-atenf145 to feed the paper and space between lines a special code bar 124 is provided, which cooperates with a pull bar 146 and cam 147 for operating the ratchet 148.

When the bar 124 is selected and permitted to moveforward it acts upon the pivotally supported member 149 and moves the pull bar'146' in the path of the reciprocating member 150 carried by the bell crank lever 1151, which is operated by the cam 147.

When-the pull bar is pulled downwardly it operates the pawl 155 and ratchet 148 through the connecting bell crank lever 152, connecting link 153 and arm 154. The cam surface 156 may be'adjusted by the handle 157 for determining, the extent of rotation of the paper platen for .each actuation of the ratchet 148, as will be clearly seen by reference to Figs. 1 and 3.

l v Platenshifts The type bars are provided with two rows of type faces, one above the other. lower row of type faces is the row normally used. When it is desired to print, from the upper row of type faces a particular group of signals is transmitted for selecting code bar 122, which cooperates with suitable mechanism to raise the paper platen so that The when the type bars are operated the type faces of the upper row will be pressed against the platen. When the bar 122 is selected and permitted to move forward it engages an arm 160 which rocks the supporting rod 161, carrying the arm 162 and the arm 165 which is pivotally supported by the frame of the printer at 166 and elevates the frame 167' .which supports the paper platen 145. From Fig. 1 it will be, seen that the supporting frame of the platen is supported by parallelogram bars 168 and 169 connected to the frame of the printer in such a manner that the platen will be raised vertically and alinement of the type will not be destroyed. When the arm 160 is moved forward it is held by a suitable pawl 170 (Fig. 3) and consequently the arm 162 and pull bar 163 are locked in their forward positions until the pawl 170 is released. Furthermore, when the arm 162 and pull bar 163 move forward a locking-member 171 under the influence of spring 172 is permitted to rotate until the pawl 173 strikes against the extension ,174 of the bell crank lever 165, where it is held until the bell cranklever 165 is actuated by a cam on the shaft 48, when the extension 174 is moved back sufliciently to permit the pawl 173 to engage the extension 174, and thereby hold the pull bar 163 in its actuated position;

This holding pawl 17 3 does not engage the extension 174until the striker bar 164 has moved the pull bar 163 to its extreme ,downward position and consequently has effected a complete shift of the paper platen. Thus,

it will be seen that the platen will be held in its shifted position for printing a number of characters from the upper row of type faces until the pull bar 163 is released, which takes place when an un'shift signal is transmitte PZa'ten unshif t. To unshift or Return theplaten to normal it is only necessary to unlock the mechanism which holds the platen in a shifted position. This is accomplished by transmitting a-group of impulses for selecting the code bar 123 which, when permitted to move forward, raises the holding pawl 170 from engagement with the arm 160, as clearly shown in Fig. 3 and permits the arm 162 to return to normal, thereby rotating the memher 171 and disengaging the pawl 173 and extension 174. The instant the extension 174 is released, the platen 145, pull bar 163, bell crank lever 165, etc., all return to their normal positions,

Auto sz'gnaI/ing.

It is desirable that the sending operator should at certain times be able to signal the receiving operator. This may be accomplished by transmittin a group of impulses for selecting the speeia code bar 121. When the bar 121 is permitted to move forward a pin carried thereby eflects the closure of a pair of contacts 181. These contacts may control the ringing of a bell, the lighting of a lamp or any desired signaling means. It is obvious that to operate the signaling means a plurality of times successively the bar 121 maybe repeatedly selected, as often as desired. 4

When the special code bars are selected to perform the various mechanical functions hereinbefore mentioned, it is necessary that means be provided to prevent actuatlon of the type carriage, so that spacing does not take place except when desired. This is taken care of by providing the lever 185 which coijperates with the arm 186 and prethereby preventing the arm 186 from rotating when the arm 79 is moved forward. When the arm 186 is held against rotation and the arm 79 moves the pawl 80 forward,

the pawl rides'upon the cam surface 189 and prevents the pawl from engaging the teeth of ratche 81 and consequently prevents the rotation of shaft 14 and worm-gear 84.

In order to'prevent operation of'the cam shaft except when selecting impulses are being received, a break is provided in the operating circuit of the starting magnet which break is controlled by the latches 25 to 29 inclusive. Whenever, any one. of the se- 188 is moved under the free end of arm 186 lecting magnets withdraws its respective latch from under a selecting bar it simultaneously .closes the circuit contacts 195, thereby preparing the circuit for the starting magnet ready for the sixth or starting impulse. Therefore, the printer can not be operated until at least one positive selecting impulse is received.

What is claimed is: t

1. Ina line printing telegraph receiver the combination of a stationar platen, a

type basket comprisingta plura ity of type bars movable transversely with respect to said platen, and permutation means selectively controlled by line current impulses for controlling the operation of the type bars for line printing.

" 2. In a printing telegraph receiver for determined groups of line current impulses for selectively controlling the operation of the t pe bars.

4. In a printing telegraph receiver, a traveling carriage having a plurality of selectable members movable therewith, a plurality of similar stationary selectable members, and means .common to all said members for selecting any one of them.

5. In a page printing telegraph receiver, the combination of a stationary platen, a

traveling carriage comprising a plurality of type bars and a corresponding number of individually operable code bars, and electroresponsive selecting mechanism controlled by line current impulses and cooperating with said code bars for controlling the operation of said type bars.

6. In a printing telegraph receiver, a stationary printing platen in combination with a type carriage movable transversely with respect to said platen and having a plurality of type bars operable selectively, a plurality of code bars supported by said carriage, and mechanism responsive to line current impulses and cooperating with said code bars to selectively operate said type bars for line printing.

7. In'a printing telegraph receiver, a plurality of selecting ma ets, a plurality of selecting bars controlle thereby, a plurality of individual permutation bars the selection of any one of which determines the characterto be printed, and means for moving, said selecting bars transversely of their length to select one of said permutation bars.

8. In a printing telegraph receiver, a plurality of selecting magnets, a selecting bar individual to each of said magnets and controlled thereby, a plurality of individual permutation bars the selection of any one of which determines the character to be printed, and means for moving said selecting bars in a. direction at right angle to their length to select one of said permutation bars.

9. In a printing telegraph receiver,--a selecting, mechanism comprising a plurality of selecting bars normally tending to move, means restraining said bars against movement, selecting magnets for conditioning predetermined ones of said bars for movement, a power Shaft. and means operated thereby subsequent to the operation of said magnets for hontrolling the movement of the conditioned bars and for restoring said bars to normal.

10. In a line printing telegraph receiver, the combination of a stationary printing platen, of a plurality of individually movable printing elements, means for moving said elements in a group-longitudinally with respect to said platen, and permutation mitting the selected ones of said bars to move to their selecting positions. simultaneously and for restoring said bars to normal position, and means controlled by said selecting means for printing any desired character.

12. In a printing telegraph receiver, the combination of selecting bars having straight continuous edges, notched members cooperating with the straight continuous edges of said selectin bars and movable singly on the completion of any selection printing devices controlled by said notche members, and mechanical means for operating said printin devices.

13. In a printing telegraph receiver, the combination of selecting bars and printing devices, code bars having notched ed es cooperating with said selecting bars an movable in a direction longitudinal thereof, levers suspended from said printing devices and means controlled by the movement of the code bars and cooperating with said levers for controlling the operation of the printing devices.

14. In a page printing telegraph receiver, a movable type carriage comprising a plurality of type bars, a stationary paper platen, a rotatable cam shaft, and means controlled by said cam shaft and cooperating with said type bars for effecting the printing of a desired character.

15. In a printing telegra h receiver, selecting means normally ten ing to move, a

plurality of restraining means holding said selecting means against .movement, means controlled by line current impulsesfor withdrawing one of said restraining means from said selecting means, a rotatable cam shaft,

and means controlled by said cam shaft for withdrawing the other of said restraining means, whereby said selecting means may and means for movin prising a traveling carnage, a rack, a wormtionary move to their selecting position and for restoring said selecting means to normal position.

16. In a printing telegraph receiver, a rotatable shaft normally tending to rotate, line controlled means for releasing said shaft, means controlled by said shaft for effecting the selection and printing of any desired character, and a friction-brake con-. trolled by the rotation of said shaft for stopping it at the end of each revolution.

17. In a printing telegraph receiver, a movable type carriage, comprising a plurality of printing bars, a rotatable cam shaft, and means controlled by said shaft for moving the type carriage step by step for the printing of each character.

18. In a printing telegraph receiver, a movable type carriage including selectively operable type bars, a rotatable cam shaft, means controlled by said shaft for stepping the type carriage forward when each type bar is operated, and means controlled by said cam shaftfor permitting the return of the type carriage to its initial position.-

19. In a prlntin'g telegraph receiver, a movable carriage comprising a plurality of type levers,- a toothed rack, a cam shaft, a pinion coeperating with the toothed rack and actuated by said cam shaft for moving said carriage in one direction step by step, the carriage in the opposite direction to 1ts initial position in one operation. i

20. Printing telegraph apparatus, com

gear coeperating with said rack for advancmg the carriage, means for withdrawing the rack from engagement with the worm-gear to permit the return of said carria e, means I for holding the rack in its. actuate position during the return of the carriage, and means actuated by the carriage upon 1ts return for releasing saidholding means.

said selecting mechanism, means for moving said'printing means in a direction transversewith respect to said selecting mechanism, and means whereby said selecting mechanism can select a new character before the printing of the preceding character toa set of line current impulses for selectively releasing said members, means for restoring said members, and means operating on the receipt 'of a second set of line impulses before the complete restoration of said members to lock said releasing'means in their selected positions. I

25. In a printing telegraph receiver, a plurality of selecting members, means responsive to a set of line current impulses for selectively releasing said members, ;means for restoring said members, means operating on the receipt of a second set of line impulses before the complete restoration of 7 said members to lock said releasing means in their selected positi0ns,'and means for releasin said locking means.

26. n a printing telegraph receiver, selecting mechanism, comprising a. pluralit of selecting bars, a latch individual to eac of said bars and normally in e agement therewith, means for withdrawing .said latches from engagement with said selecting bars, means for holding said latches out of engagement with said bars, and means forreleasing said holding means.

27. Ina printing telegraph receiver, se-

lecting mechanism, comprising a pluralityof selecting bars, a 'latch normally in engagement with each of said bars, means controlled by line current impulses for Withdrawing said latches from engagement with 7 said selecting. bars, means for holding said latches out of enga ement with said bars 21. In a printing telegraph receiver, a sta-I and means for releas ng said holding means.

aper platen, selecting mechanism "a plurality of type levers responsive to said selecting mechanism and coiiperating with saidpaper platen for printing any desired character, and means for placing said selecting mechanism in readiness for the selection of a character before the printing of the pieceling character selected thereby is com- P ete v 22. In a page printing telegraph receiver,

. selecting mechanism responsive to line ourrent impulses, type bar printing mechanism ,controlled thereby and movable transversely 28. In a printing telegraph receiver, a selecting mechanism, comprising a plurality of selecting bars movable in a direction transversely of their length, latches for holding said bars in their normal positions, means for withdrawing said latches to permit actuation of said selecting bars, and means for restoring said selecting. bars to normal. I

- 29. In a printing telegraph receiver, selecting mechanism, comprising a plurality of selecting magnets, a plurality of selecting bars, a plurality of latches normally in engagement with said selecting bars and arranged to be actuated by said'selecting magnets, meansfor holding said latches out of from said latches.

30. Printing telegraph l apparatus com- 1 motor for controlling the tension of said spring, means controlled by said shaft for causing the intermittent operation of said motor, and a clutch for preventing counter rotation of said motor.

32. Printing telegraph apparatus, comprising a rotatable cam shaft, a spring for driving said shaft, an intermittently operating motor for winding said spring, circuit connections for said motor, and a traveling nut actuated by said cam shaft for controlling the circuit connections of said motor.

33. Printing telegraph apparatus, comprising an intermittently operating motor, circuit connections therefor, a shaft, means connecting the shaft and the motor, means actuated by the rotation of said shaft for controlling the circuit connections of the motor, and means for preventing counter rotation of said motor.

34. Printing telegraph apparatus, com prising a rotatable shaft, driving means for said shaft, line controlled means for render-' ing said driving means effective, a reciprocating member supported by said shaft for controlling the driving means, and a clutch for preventing backward rotation of said drivin means.

35. rinting telegraph apparatus, comprising a cam shaft normally tending to rotate, means for releasing said shaft, and a brake-band controlled by said shaft and cooperating therewith to stop the rotation of said shaft at the end of each revolution.

36. Printing telegraph apparatus, comprising a rotatable shaft, means for driving said shaft, a friction-brake for controlling the rotation of said shaft, a magnet for releasing the brake, and means carried by said shaft for controlling the operation of said driving means.

37. Printing telegraph apparatus, comprising a rotatable shaft, means for driving the said shaft, a friction-brake for .holding said shaft against rotation, a magnet for releasing said brake, and means actuated by the'shaft for controlling the operation of the driving means.

38. Printing telegraph apparatus, comprising a cam shaft normally tending tor0- tate, a brake-band for holding said shaft against rotation, a toggle-joint forreleasing said brake-band instantaneously, an electromagnet controlled by line current impulses for actuating said toggle-joint, and cams carried by said shaft and cooperating with said brake-band for stopping the rotation of said shaft.

39. Printing telegraph apparatus, comfor releasing said brake-band, and cams carried by said shaft and cooperating wit said brake-band for stopping the rotation of said shaft at the end of each revolution.

41. In a printing telegraph receiver, a traveling carriage having a plurality of selectable members movable therewith, a plurality of stationary selectable members, means common to all said members for selecting any oneof them, means acting on the selection of one of said movable members to advance the carriage, and means operating on the selection of one of said stationary selecting members to prevent the advance of said carriage.

' 42. In a printing telegraph receiver, a traveling carriage having a plurality of selectable bars movable therewith, a plurality of stationary selectable bars, means common to all said bars for selecting any one of them, means acting on the selection of one of said movable bars to advance the carriage, and means operating on the selection of a particular one of said stationary bars to return the said carriage to normal.

43. In a printing telegraph receiver, the combination of a traveling type carriage,

. comprising a plurality of character arms, a

selectable member individual to each character arm, and an actuating arm, with sta tionary selecting bars cooperating with said selectable members to select one of said character arms, and a striker bar common to-all.

said selectable members and cooperating with said actuating arm to actuate the character arm selected.

44. In a printing telegraph receiver,'select- 1ng mechanism comprising a plurality of selecting magnets, selecting bars controlled thereby, code bars cooperating with said selecting bars, a rotatable cam shaft, means controlled by said cam shaft for releasing the selected code bar, and means controlled by said shaft and selected code bar for printing any desired character.

45. In a printing telegraph receiver, selecting bars, means for selectively releasing said current impulses, and means controlled by I said cam shaft for actuating the selecting bars.

47. In a printing telegraph receiver, a .ro-

tatable cam shaft,-a movable type carriage comprising a plurality of printing elements,

code bars cooperating with said printing elements and carried by said type carriage, and means controlled by said code bars and actuated by said cam shaft to effect the actuation of said printing elements.

48. In a printing telegraph receiver, the combination of a movable type carriage, printing elements carried thereby, means for moving said type carriage, a plurality of selectable code bars, means for causing the selected code bars to control the printing elements, and means cooperating with the code bars for actuating the printing elements to print a desired character.

49. Printing telegraph apparatus, com

prising. a traveling type carnage, a rack, a

worm-gear traveling with said carriage and cooperating with said rack for advancing the carriage step by step, means for withdrawing the rack from engagement with the worm-gear to permit the return of said carriage, and means actuated by the carriage,

upon its return to permit the said rack toreengage the worm-gear.

50. In a printing telegraph receiver, selecting mechanism comprising a plurality of selecting bars normally tending to move, a latch individual to each of said bars and normally in engagement therewith to prevent movement thereof, means for withdrawing said latches from engagement with said selecting bars, additional means normally in engagement with said bars to prevent actuationthereof when said latches are withdrawn, a cam shaft, and means actuated thereby to control said additional means whereby said selecting bars may be actuated in accordance with the respective latches withdrawn. I I I,

51. In a printing telegraph receiver, a rotatable cam shaft, selecting bars, means controlled by line current impulses for selectively conditioning said bars for movement, a plurality of code bars controlled by said selecting bars, means for normally,

holding said code bars out of engagement with said selecting bars, and means controlled by said cam shaft for releasing. the conditioned ones of said selecting bars and for releasing the selected code bar.

In witness whereof, I hereunto subscribe my name this 5th da of June, A. D. 1917. HARRY P 'ANNENSTIEHL.

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