US1766713A - Transmitter - Google Patents

Description

June 24, 1930. E. E. KLElNSCHP VIlD T TRANSMITTER 2 sheets-sheet 2 Original Filed OG'b. 26, 1925 gwuento'c Patented June 24, 1930 UNITED STATES PATENT OFFICE EDWARD E. KLEINSCHHIDT, OF CHICAGO, ILLINOIS, ASSIGNOR TO TELETYPE CORPO- RATION, OI CHICAGO, ILLINOIS, A. CORPORATION OF DELAWARE TRAN SMITTEB Application filed October 26, 1925, Serial No. 64,958. \lienewed April 1, 1929.

The present invention relates to improvements in transmitting apparatus.

More particularly the invention relates to improvements in transmitters for selective systems, such for example as are utilized in printing telegraphy.

Objects of the invention are to provide improved and simplified transmitting mechanisms, especially adapted for use in printing telegraph systems; to provide novel single contact transmitting arrangements; to provide novel overlap and storage arrangements in signalling transmitters; and toprovide improved key-board transmitters especially adapted for operation in start and stop printing telegraph systems.

Further objects of the invention are such as may be attained by utilization of the various combinations and subcombinations hereinafter more fully set forth and as defined by the scope of the appended claims.

Referring to the drawings.

Figure 1 is a fragmentary side elevation partially in section showing a preferred em- 2 bodiment of the invention.

Figure 2 is .a fragmentary plan view of the invention partially in section.

Figure 3 is a fragmentary side elevation partially in section of a modified form of the invention.

Figure 4 is a fragmental side elevation of the form shown in Figure 3, with the control members locked in transmitting position.

Figure 5 is a detailed plan View showing the locking means for the control member.

The transmitter disclosed in Figures 1 and 2 of the present application is a continuation of the transmitter shown in application S. N. 649,562, filed July 5, 1923, and the reference characters used in the copending case are applied to like parts in the present application. In this form of the invention a plurality of key bars 399 are pivotally supported in the frame 398 and are provided on their ends with key knobs which are held in upward position by means of suitable springs and are guided in the plate 404 as will more fully appear by a reference to the copendlng apphcation. A plurality of endwise movable selector bars 405 to 410, have cut in the lower edges thereof a series of cam notches which are arran ed in well known manner to co-act with the ey bars to set the selector bars 405 to 409 in the various selective combinations. Bar 410 is moved to the right in Figures 1 and 2, by actuation of any key bar 399, and as soon as the depressed key bar is released it is restored to its initial position by a light spring 412. Bars 405 to 409 are floating and remain in the position where last set until a different position is required in a succeeding selective combination.

Pivotally mounted on an extension of clutch control bar 410 is a member 413 provided with extensions 414 and 415. Extension 414 is held in engagement with a projection 416 of a pivoted stop arm 417 by means of a spring 418. Arm 417 is held against a cam 419 by a spring 420 and in the position shown acts as a stop to prevent rotation thereof. A pin 421 carried by cam 419 is arranged to engage arm 415 and depress 413 to disengage 414 and 416 when cam 419 is permitted to rotate. Cam 419 is ri 'dly secured to a spindle 422 (Fig. 2) whic is rotatably supported in journals 423 and held properly spaced by collars 424 secured thereto. Securely fastened to spindle 422 is a member 425 provided with key slots into which projections 426 of clutch members 427 slidably fit. Clutch member 427 is slidably mounted on spindle 422 and is pressed against a friction disc 428 and a driving gear 429 by means of a spring 430. Gear 429 is provided with a hardened ball race 431 which is adapted to rotate on balls 432, which in turn are supported on a ball race 433 mounted on spindle 422. Members 431 and 433 are shaped to take up the end thrust on gear 429' due to the compression of spring 430. Gear 429 is driven continuously from shaft 29 by a ear 434. The teeth on gears 429 and 430 may e slightly spiral in shape and are so arranged'that they will slide easily into driving relation, so that the key-board may be slid into and out of operative relation with a printer drive shaft while the printer is in operation as more fully disclosed in the-copendlng case. When this arrangement is utilized the key-board mechanism is not secured to the printer frame in any way but simply slides into and out of operative relation with respect thereto.

A cam shaft 435 is provided with reduced end extensions 436 and 437 which are rotatably and slidably supported in member 438 and a recess in the end of shaft 422 respectively. Secured to cam 419 is a driving shelf member 439 into a slot in which a pin 440 secured to cam shaft 435 slidably fits. As cam 419 rotates it drives shaft 435 by means of shelf 439, and pin 440. Spaced regularly at angular distances of degrees from cam 440 and from each other and in axially displaced relation along shaft 435 are pins 441, 442, 443 and 444. A'plurality of cam members 445 to 449 are pivotally mounted at 450 and each cam member is disposed above and secured to one of the bars 405 to 409 respectively by means of springs 451 and 452 secured to projections of the bars and downward extensions of the cam members. When the bars 405 to 409 are moved endwise by the depression of a key, cam members 445 to 449 will be pivoted upward into the paths, or downward out of the paths, of pins 440 to 444 respectively as the pin shaft 435 rotates. A start interval cam 453 is fixed to support 438 and is placed in the path of cam 444. A plurality of locking members 454 each provided with a pair of V shaped notches 455 are pivoted at 456 and held downward against a pin 457 by means of springs 458 individual to each of the members 454. Pin 457 is carried by an arm 458 pivoted at 456 on one end, the other end being supported by a pin 459 secured to the cam 419 when the parts are in zero position as shown in Figure 1. When cam 419 starts into rotation, arm 458 will be permitted to drop and locking members 454 will move downward to bring one or the other of the notches 455 into engagement with the V sha d extensions of cam members 445 to 449. his movement of members 454 forces cam members 445 to 449 into their extreme upper or lower positions and locks them until the revolutionof cam 419 is substantially completed and member 458 is again raised by pin 469 to disengage members 454 from the cam extensions.

Cam shaft extension 436 engages a pivoted contact carrying member 460 upon which is mounted a contact member 461. Contact member 451 is adapted to engage a contact 463 and is held against an adjustable back contact 462 by means of a spring 464. Spring 464 also operates to hold cam shaft 435 in a normal unactuated position.

The rest or zero position of the keyboard transmitter is as shown in Fig. 1. To transmit a code combination, the corresponding key is depressed with the result that clutch control bar 410 is shifted to the right against the tension of s ring 412, and the bars 405 to 409 are shifte to the ri ht and left in combination according to t e key depressed.

Movement of bar 410 to the right causes member 413 to pull stop arm 417 out from engagement with the projection of cam 419. It will of course be understood that shaft 29 and therefore gears 434 and 433 are rotating continuously. As soon as arm 417 is shifted b bar 410, the cam 419, shaft 422 and sha 435 will be rotated with gear 433 through clutch members 427 and 428. As soon as rotation of the cam shaft commences, pin 444 will ride up over fixed cam 453 and will cause an axial or endwise movement of shaft 435 which will rock member 460 on its pivot against the tension of spring 464, and will throw contact 461 against 463 to transmit a start condition. This start condition is invariably caused to precede each combination of marking and spacing conditions. As rotation of the cam shaft continues, in 444 will ride over cam 453, and during t is interval or shortly thereafter, pin 421 will engage extension 415 of member 413 and will rock 413 about its pivot to disengage extension 414 from projection 416 of arm 417. Arm 417 will then be moved by its spring 420 into position to stop the rotation or cam 419 and the cam shaft at the end of a complete revolution.

The movement of bars 405 to 409, through springs 451 and 452 raises or lowers the cam members 445 to 449 and throws the V shaped extensions to the right or left in Figure 35 depending on the motion of the respective bars 406 to 409. The cam extensions are then positioned under the notches 455 of their individual locking members 454. When this positioning of the cams has occurred, pin 459 has rotate to a position where arm 458 will be permitted to drop. Members 454 will then move under the influence of springs 458 until notches 455 engage their respective cam member extensions and will lock cam members 445 to 449 in raised or lowered sition as the case maybe. After the start interval has been completed, if the cam member 445 is locked in lowered position, it will' be out of the path of pin 440, and spring 454 will accordingly throw contact 461 from contact 463 to contact 462 and will at the same time restore cam shaft 435. If cam member 445 has been locked in raised position then it will be in the path of pin 440, and the cam shaft will be prevented from restoring, thereby maintaining contact 461 against contact 463. In similar manner the positions of cam members 446 to 449 will determine the position of contact 461, as the pins 441 to 444 will coact with these members respectively in a manner similar to the coaction of member 445 and pin 440. It will be noted that pin 444 serves to transmit the start impulse or condition and the sixth impulse or condition and also form a driving connection for the pin shaft. After p1n 444 has rotated past cam member 449, spring 464 will restore the cam shaft 435 and at the same time cause contact 461 to engage contact 462 and thereby transmit the seventh impulse or stop condition to the line. This stop condition is always the same, and the parts are so arranged that it is equal to degrees of angular rotation of the cam shaft to correspond with the division of the receiving cam shaft selector. The start condition is for the purpose of starting the receiver into operation and thestop condition is to insure the stopping of the receiving cam shaft. It will of course be understood that the spacing and relation of the pins as given is for equal speeds of rotation of the receiving and transmitting shafts. If desired the angular spacing between the transmitting pins may be reduced and the angle of the stop condition may be correspondingly increased to provide for operation of the keyboard transmitter at a slightly lower speed than the receiver and still permit interchangeable keyboard and tape operation.

During the seventh or stop signal interval, pin 459 will engage and raise arm 458, and pin will accordingly raise members 454 thereby releasing cam members 445 to 449 to take up a succeeding selection. Even if the depressed ke is held down, after the revolution is compl eted stop arm 417 will bring the cam 419 and connected parts to rest, and before another character can be sent, the tie pressed key must be released. If another key is depressed before the first is released bar 410 will be prevented from restoring and no char acter will be transmitted. As soon as pin 459 moves from in under arm 458 and the selection is locked up, the depressed key may be released, and bar 410 will then restore to the left under the influence of spring 412. When bar 410 has restored, member 414 will hook over projection 416 of arm 417 under the infiuence of spring 418.

As above pointed out, the selection is locked up as soon as members 454 are permitted to drop. As soon as the locking up has occurred, and the depressed key has been released, another key may be depressed which will again shift bar 410 to move arm 417 out of the path of the stop projection on cam 419, and will selectively shift the bars 405 to 409 into anew combination. Until locking members 454 are raised, this movement of bars 405 to 409 will simply vary the tensions of springs 451 and 452 by those bars which have their positions changed in the new selection. Then, as soon as members 454 are raised, the cam members will take positions according to the varied tensions in springs- 451 and 542. The members 454 will then again lockup the new selection as above described and a third selection may then be set up.

The speed of the transmitter is preferably set to run at sixty to eighty or more words a minute. If the transmitting operator is faster than the transmitter, the transmitter and printer operating at equal speeds will not stop at every revolution but 'will operate continuously for a number of revolutions at a time, until the operator slows up. If the operator is slower than the transmitter, the transmitter and receiver will stop each revolution. Due to the fact that pin 440 releases member 414 from engagement with 416 after the selection has been locked u a peculiar touch is given to the keyboard by the relieving of the tension of spring 420 on bar 410 which will indicate to the experienced operator when to release the depressed key, and todepress the succeeding key. The speed of operation of the transmitter is so high, however, that the ordinary operator cannot operate the keys fast enough to keep up with the transmitter speed. It will be further noted that the keys need not be depressed all the way as a slight movement thereof is suflicient to throw the V shaped cam member extensions partly into one or the other of notches 455, and members 454 will then positively shift the cam members 445 to 449 to complete their motion.

The lightness of parts permits very high speed operation of the transmitter which eliminates the necessity of providing a bound keyboard. A Wide margin of operation and an overlap is provided with a simplicity of structure heretofore nnattained in the art. The difference in weight of parts usable and simplicity of mechanical structure which permit the attaining of an overlap and such high speed operation of the transmitter as will eliminate the bound keyboard heretofore I found necessary is decided advance in the art.

In case it is desired to provide a transmitter without overlap or storage of characters in the selector mechanism, the form of invention shown in Figures 1 and 2 is modified by eliminating the springs 451 and 452 connecting the code bars 405 to 409 to the cam members 445 and 449, and the cam-members 445 to 449 are connected to the code bars 405 and 409 bymeans of projections 466 provided on each of the code bars between which the ends of the downward extensions of arms or members 445 and 449 are confined as shown in Figures 3 and 4. A further modification in the mechanism may be made by substituting for the individual locking members 454 disclosed in Figures 3 and 4, a unitary locking member 467" common to all of the members 445 to 449 whichis pivotally supported on the pins 456 and is provided with the locking grooves 469. An extension 470 of member 467 is held against the projection 459 carried by member 419 by means of the spring 468 with the parts in normal or'rest positions as shown in Figure 3. Because of the light weight of the (parts a slight frictional resistance to the en wi thesi movement of shaft 435 in operation of the transmitter is preferably provided by means of spring 471 wound around the shaft 435 with one end thereof secured to pin 440 and the other end thereof secured to the driving shelf 439. The remaining details of the transmitter are the same as set forth in connection with the form shown in Figures 1 and 2 to the description of which reference niay be had for a full understanding there- 0 In operation of this form of the invention when one of the key bars is depressed the code bars are shifted and rotation of the shaft 435 is initiated as above set forth. As soon as the pin 459 passes beyond the extension 470 of locking member 467 the spring 468 will force the member 467 downward as shown in Figure 4 until the locking extensions of the parts, due to the confinement of the ends of the selector or cam members 445 to 449 between the projections 466 of the code bars 405 to 409, the cam members and code bars will be locked until the pin 459 raises member 467 to the position shown in Figure 3 at the end of the transmission of the selected combination of impulses. The rotation of the 'pins 440 to 444 past the cam member 445 to 449 effects endwise movement of shaft 435 and transmission of code combinations of impulses in the manner above set forth.

Having described preferred embodiments of the invention, what is desired to be secured by Letters Patent and is claimed as new is:

1. A.signalling transmitter comprising a rota shaft movable endwise to transmit signaling conditions; means whereby said shaft invariably transmits a predetermined lmpulse and means controlling the endwise movement of said shaft in accordance with al to be transmitted.

2. e combination as set forth in claim 1 together with a single electrical contact actuated by the endwise movement of said shaft to transmit the signalling conditions.

3. The combination as set forth in claim 1 in which said lastmentioned means comprises a plurality of selectably movable cams.

4. The combination as set forth in claim 1 in which said last mentioned means comprises a plurality of selectable members controlling the endwise movement of said shaft and a plurality of keybars controlling said memmeans; control means in ividual to said transmitting means; and solely mechanical connections between each of said control means and its individual transmitting means permitting said control means to be conditioned for actu' ation in accordance with a signal combination while said transmittin means is being actuated in accordance wit the preceding si al combination.

In combination a plurality of keybars; a plurality of code bars actuated by said keybars; a plurality of selectable control members; yielding actuating connections between said control members and said code bars; and transmitting means controlled by said control members.

8. The combination as set forth in claim 7 together with a locking member individual to each of said control members.

9. The combination as set forth in claim 7 together with' a common locking member for said control members.

10. A transmitter comprising a rotary shaft; a stop member for said shaft; a stop actuating member; a selectable connection between said stop member and said actuating member; and means controlled by the rotation of said shaft for freeing said stop member from said releasable connection to permit the same to arrest rotation of said shaft at the end of a revolution independently of the position of said actuating member.

11. A keyboard transmitter comprising a rotary shaft; a bank of key levers, means responsive to the operation of one of said key levers for initiating rotation of said shaft,

means for moving said shaft longitudinally as it rotates in accordance with the key operation to transmit a start impulse followed by a code combination of impulses; and means controlled by the rotation of said shaft to prevent repetition of a code if a key is maintained in actuated condition after the trans? mission of the code controlled thereby.

12. In a signalling transmitter, a rotating shaft, means for selectively operating sald shaft longitudinally as it rotates, an im ulse transmitter controlled by the longi tudinal movement of said shaft, and means whereby said transmitter invariably transmits a predetermined impulse for each rotation of the shaft.

13. In a signalling transmitter, a rotatable shaft selectively operated in an an lar direction from that of its rotation, an a transmitter selectively controlled in accordance with the operation of said shaft, and means whereby said shaft invariably transmits a predetermined im ulse.

14. In a signallln transmitter, a rotating shaft comprising ap urality of fingers, means coacting with said fingers for operating said shaft longitudinally, a transmitter selectively controlled by said operated shaft.

15. In a signalling transmitter, a rotating shaft, a plurality of fingers angularly displaced from each other, a member individual to each of said fingers, said members being arranged to be consecutively associated with said fingers for operating said shaft longitudinally and a transmitter controlled by the longitudinal movement of said shaft.

16. In a signalling transmitter, a rotatable shaft, a plurality of fingers integral with said shaft and angularly displaced from each other, a member, individual to each of said fingers, having a plurality of positions and arranged to coact with a finger for moving said shaft in accordance with its position and selector bars for selectively positioning said members.

17. In a signalling transmitter, a rotatable shaft comprising a plurality of fingers integral with and angularly positioned about said shaft, a cam member individual to each of said fingers and arranged to consecutively associate with said fingers for operating said shaft in accordance with its position, and a selector bar individual to each of said cam members for selectively positioning said cam members.

18. In a signalling transmitter, a plurality of notched selector bars, each operable to a plurality of positions, a cam member individual to each of said selector bars, said cam members being spring connected to said selector bars for selectively positioning said cam members in accordance with the operation of said selector bars.

19. In a signalling transmitter, a plurality of movable selector bars positioned in accordance with a code combination of impulses to be transmitted, a pivoted member individual to each of said selector bars and a spring con-- nection between each selector bar audits individual pivoted member for operating said member in accordance with the position of said bar.

20. In a signalling transmitter, a plurality of movable selector bars positioned in accordance with a code combination of impulses to be transmitted, a pivoted member individual to each of said selector bars and a flexible connection between each of said se' lector bar and its individual pivoted member for positioning said members in accordance with the operation of said bars.

21. In a signalling transmitter, a pluralityof movable selector bars positioned in accordance with a code combination on impulses to be transmitted, a pivoted member individual to each of said selector bars and a plurality of flexible connections between eacho'f said selector bars and its individual pivoted members for positioning said members in accordance with the operation of said bars.

22. In a signalling transmitter, a plurality of movable selector bars operable to a plurality of positions in accordance witha code combination of impulses to be transmitted, a

ipivoted member individual to each of said selector bars and a plurality of flexible members connecting each of said selector bars and its individual pivoted member, said flexible member being individual to each direction of movement of said selector bars for moving said pivoted members in accordance with the positions of said selector bars.

23. In a signalling transmitter, a plurality ofmovable selector bars operable to a plurality of positions in accordance with a code combination of impulses to be transmitted, a pivoted member individual to each of said selector bars positioned in accordance with the operation of said selector bars and means for maintaining said pivoted members in position while said selector members are positloned in accordance with a new code combination of impulses.

24. In a telegraph system, a plurality of selectors, each of said selectors having a plurality of positions, a member individual to each of said selectors, a mechanical connection between each of said selectors and its member for operating said members in accordance with the position of said selectors and means whereby said selectors are operated to different positions while said members remain set in accordance with the previous position of said selectors.

25. In a telegraph system, a plurality of selector bars positioned in accordance with a code combination of impulses an intermediate member individual to each of said selector members, said members being mechanically connected to said selector bars whereby said members are operated in accordance with the positions of said selector bars, and means whereby said selector members are operated in accordance with a new code combination of im ulses while said intermediate members remain set according to the preceding code combination of impulses.

26. In a telegraph system, a plurality of selector bars operated in accordance with a code combination of impulses, a member individual to each of said selector bars, mechanical connections between said selector bars and individual members said mechani cal connections bei arranged to permit said selector bars to lie operated in accordance with a new code combination of imulses while said individual members are set y the preceding code. I

27. In a signalling transmitter, a plurality of movable selector bars ositioned in accordance with a code com ination of impulses to be transmitted, a member individted, a member individual to each of said selector bars and a plurality, of flexible members connecting each of said selector bars and its individual member, said flexible member being individual to each direction of movement of said selector bars for moving said members in accordance with the positions of said selector bars.,

29. In a si alling transmitter, a pluralitly of movab ia selector bars 0 rable to a p urality of positions in accor ance with a code combination of impulses to be transmitted, a member individual to each of said selector bars and a plurality of flexible devices connecting each of said selector bars and its individual member, said flexible device being individual to each direction of movement of said selector bars for moving said members in accordance with the positions of said selector bars, a rotating shaft, means co-acting successively with each of said members for operating said shaft longitudinally in accordance with the positions of said members and a transmitter controlled by the longitudinal movement of said shaft.

30. In a signalling transmitter, a plurality of movable selector bars operable to a plurality of positions in accordance with a code combination of impulses to be transmitted, a ivoted member individual to each of said seicctor bars, a plurality of flexible members connecting each of said selector bars and its individual pivoted member, said flexible member bein individual to each direction of movement of said selector bars for moving said ivoted members in accordance with the positions of said selector bars, a rotating shaft, means coacting successively with each of said pivoted members for operating said shaft longitudinally in accordance with the positions of said members and a transmitter controlled by the longitudinal movement of said shaft.

31. In a signalling transmitter, a rotating shaft, a plurality of fingers angularly displaced from each other, pivoted cams operable to a pluralit of positions, said cams being arran ed to be consecutively associated with said gers for operating said shaft longitudinally a transmitter controlled by the longitudinal movement of said shaft, and means whereby said transmitter invariaby transmits a redetermined impulse for each rotation of t e shaft.

32. In a signalling transmitter, a rotatable shaft comprising a plurality of fin ers integral wit and angularly positione about said shaft, pivoted cams operable to a plurality of positions individual to each of said fingers and arranged to consecutively associate with said fingers for operatin said shaft longitudinally in accordance wit their positions, and a selector bar individual to each of said cam members for selectively operatin said cam members.

33. n a signalling transmitter, a plurality of movable selector bars positioned in accordance with a code combination of impulses to be transmitted, pivoted cams operable to a plurality of ositions and a spring connection between eac selector bar and its individual pivoted cam for operating said lc)ams in accordance with the position of said ar.

34. In a signalling transmitter, a rotating shaft, a plurality of fingers angularly displaced from each other, pivoted cams operable to a plurality of positions, each of said cams arranged to be locked in one of a plurality of positions, said cams bein arranged to be consecutively associated wit said fingers for operating said shaft lon 'tudinally and a transmitter controlled by t e longitudinal movement of said shaft.

35. In a si alling transmitter, a rotatable shaft comprising a plurality of fingers integral with and an ularly positioned about said shaft, means or releasing said shaft pivoted cams operable to a plurality of positions, each of said cams arranged to be locked in one of a plurality of positions, and arranged to consecutively associate with said fingers for operating said shaft in accordance with its positions and a selector bar individual to each of said cam members for selectively operating said cam members.

36. In a signalling transmitter, a plurality of movable selector bars positioned in accordance with a code combination of impulses to be transmitted, pivoted cams o erable to a pluralit of positions each of said cams arranged to o locked in one of a plurality of positions, and a spring connection between each selector bar and its individual pivoted cam for operating said cams in accordance with the position of said bar.

37. In a telegraph device, a rotatable shaft, means tendin to rotate said shaft, a latch device for hol ing said shaft from rotating, means for operating said latch whereby said shaft is released for rotation and means controlled by said shaft for operating said last mentioned means to release said latch device whereby said latch device is positioned to again latch said shaft from rotation.

38. In a telegraph device, a rotatable shaft, means tending to rotate said shaft, a pivoted latch device for holding said shaft from rotating, pivoted means for o ratin said latch whereby said shaft is re eased or rotation and means controlled by said shaft for operating said last mentioned means to release said latch device whereby said latch device is positioned to again latch said shaft from rotation.

39. In a telegraph device, a rotatable shaft, means tending to rotate said shaft, a pivoted latch device normally urged into engagement with said shaft to from rotating, a lpivote means normally urged into interloc ed engagement with said revent said shaft latch device for operating said latch device out of engagement with said shaft whereby said shaft is released for rotation by said first means, and means controlled when. said shaft starts rotating for disengaging said last mentioned means from said latch device.

40. In a telegraph device, a rotatable shaft, means tending to rotate said shaft, a pivoted latch device, normally urged into engagement with said shaft to prevent said shaft from rotating, a pivoted means, spring 1 means for normally urging said pivoted means into interlocked engagement with said latch device for operating said latch device out of engagement with said shaft whereby said shaft is released for rotation by said first means, and means controlled when said shaft starts rotation for disengaging said pivoted means from said latch device.

41. In a telegraph device, a rotatable shaft, means tending to rotate said shaft, a pivoted latch device normally urged into engagement with said shaft for preventing said shaft from rotating, a pivoted means normally urged into interlocked engagement with said latch device for operating said latch device out of engagement with said shaft, means controlled when said shaft starts rotating for disengaging said pivoted means from said latch device and a selector bar supporting said pivoted means, said selector bar being mechanically operated for transmitting a code whereby said latch device is removed from engagement with said shaft.

42. In a telegraph transmitter a plurality of selector bars operable in various combinations for transmitting a code combination of impulses, a rotatable shaft selectively operated by said selector bars for transmitting said code, means tending to rotate said shaft, a latch device normally in engagement with said shaft for locking said shaft from rotation, means operated in response to the operation of any one of said selector bars for removing said latch device from engagement with said shaft whereby said shaft is released for rotation by said first means, means for releasing said latch device to again engage said shaft while said selector bars are in operated position, and means responsive to the first movement of said shaft for transmitting a start impulse preceding'the code combinations.

43. In a telegraph transmitter, a plurality of selector bars operable in various combinations for transmitting a code combination of impulses, a rotatable shaft selectively operated by said selector bars for transmitting said code and a pivoted latch device normally in engagement with said shaft for locking said shaft from rotation, pivoted means operated in response to the operation of any one of said selector bars for removing said pivoted latch device from engagement with said shaft and means for releasing said latch device to again engage said shaft while said selector bars are in operated position, and means responsive to the first movement of' said shaft for transmitting a start impulse preceding the code combination.

44. In a telegraph transmitter, a plurality of selector bars having normally non-operating and operating positions, means for selectively positioning said selector bars in operating position, a normally non-operating transmitter, means responsive to the positioning of said selectors for starting said transmitter into operation, means controlled by said transmitter for transmitting a start signal followed by a code combination of impulses, said transmitter being restored to and held in its non-operating position at the end of the code transmission until said selector bars are again restored to normal and re-operate.

45. In a telegraph transmitter, a plurality of selector bars selectively positioned for transmitting a code combination of impulses, a transmitter for transmitting impulses in accordance with the setting of said selectors, means for transmitting a start signal preceding said code combination and means for preventing said transmitter from sending more than one code combination for each selector positioning of said bars.

46. In atelegraph transmitter, a rotatable shaft, normally held from rotation, means tending to rotate said shaft, a plurality of code bars, means responsive to the operation of said code bars for releasing said shaft to rotate under control of said first means, and means preventing said shaft from making more than one revolution for each operation of said code bars.

47. In a telegraph transmitter, a single contact, a plurality of selector bars, means responsive to the operation of said selector bars for operating said single contact transmitter for code transmission, means for transmitting a start impulse preceding said code and means operative if said selector remains operated after the code has been transmitted for preventing said contact from transmitting a succeeding code.

48. In a signalling transmitter, a rotatable shaft, a plurality of movable selector bars positioned in accordance with a code combination of impulses to be transmitted, a pivoted member individual to each of said selector bars, and mechanically connected thereto whereby said pivoted members are positioned in accordance with the positions assumed by said selector bars, said pivoted members actuating said rotatable shaft for transmitting code combinations of impulses in accordance with the positions of said pivoted members.

49. In a signalling transmitter, a rotatable shaft, a plurality of. selectors each of said selectors having a plurality of positions, a

pivoted member individual to each of said selectors, a s ring connection between each printed mem er and its individual selector for operating said pivoted member to a position in accordance with the position of said selector and code transmitting means variably operated by said rotating shaft in accordance with the positions assumed by the pivoted members.

50. In a signalling transmitter, a rotatable shaft, a lurality of movable selector bars positioned in accordance with a code combination of impulses to be transmitted, a ivoted member individual to each of sai selector bars arranged to be positioned in accordance with the osition of said selector bar means for late ing said pivoted members in operated position and means operated by said rotatin shaft for transmitting a start signal sai means being controlled by said shaft in accordance with the locked posistion of each of said pivoted members for transmitting code combinations of impulses.

51. In a signalling transmitter, a rotatable shaft, a plurality of movable selector bars positioned in accordance with a code combination of impulses to be transmitted, a pivoted member individual to each of said selector bars arranged to be positioned in accordance with the position of said selector bars, means for latching said pivoted members in operated position, means rated by said rotating shaft for transmitting a start signal and in accordance with the locked position of said pivoted members for transmitting code combinations of impulses, and means operative following the transmission of said code combination of impulses for releasin the latched pivoted members.

52. n a si allin transmitter, a rotatable shaft normal hel in non-rotating condition, a plurality of selector bars each operable to a fplurality of positions, a plurality of levers or variably operating said selector bars, means operative followin the ositioning of an one of said selector ars or starting said s aft into rotation, means controlled by said selectors for moving said shaft longitudinally as it rotates, means operated by said shaft in accordance with the position of said selector bars for transmitting code combinations of impulses, and means operative for bringing said shaft to a stop at the end of the first revolution in the event that said selector bars have not been reoperated.

53. In a telegraph transmitter, a rotatable shaft, a lura ty of selectors, each of said selectors aving a plurality of itions, a

ivoted member individual to eac of said seectors and operated in accordance with the positions assumed by said selectors, means or latching said pivoted members in opercontrolled by said shaft in accordance with the positioning of said pivoted member, means operative following a single revolution of said shaft for rel said pivoted member and means operative or preventing said shaft from making more than one revolution for each operation of said selector.

54. In a telegraph transmitter, a plurality of selector bars operable in various combinations for transmitting a code combination of impulses, a rotatable shaft selectively operated by said selector bars for transmitting said code, means whereby said shaft invariably transmits a predetermined im ulse for each rotation of the shaft, a pivoted atch device normally in engagement with said shaft for locking said shaft from rotation, pivoted meansoperated in response to the operation of any one of said selector bars for removing said pivoted latch device from enagement with said shaft and means for reeasing said latch device to again engage said shaft while said selector bars are in operated position.

55. In a telegraph transmitter, a plurality of selector bars operable in various combinations, a rotatable shaft selectively operated by said bars, said shaft being moved endwise for transmittin code combinations of impulses in accor ance with the operation of said bars, means whereby said shaft invariably transmits a predetermined code impulse, said shaft being normally latched against rotation and means whereby said shaft is released for a single revolution under control of said bars.

56. In a telegraph transmitter, a plurality of selector bars operable in various combinations, variable cam member individual to each of said selector bars, a connection from each of said selector bars to its individual cam member whereby said cam members are variably positioned in accordance with the operation of said selector bars, a fixed cam and a code transmitter controlled by said fixed and variable cams for transmitting code combinations of impulses in accordance with the operation of said selector bars.

57. In a telegraph transmitter, a plurality of selector bars operable in various combinations, a cam member individual to each selector bar and variabl operated thereby, a fixed cam member an a code transmitter operated by said variable and fixed cam members for transmitting a code and invariabl tzlnsmitting a predetermined impulse in eac c e. I

In testimony whereof I afiix m si ature.

EDWARD E. KLEIN SC HbfI DT.

ated position, means responsive to the posiv tioning of said selectors for releasing said shaft for rotation, an impulse transmitter

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