US1883955A - Selecting telegraph - Google Patents

Description

oct. 25, 1932. E, E KLEINSCHMlDT 1,883,955

SELECTING TELEGRAPH Filed April 14, 1928 5 Sheets-Sheet l I NV EN TOR.

A ATTORNE Y.

@et 25, 14932 E. E. KLEINSCHMIDT 883955 SELECTING TELEGRAPH Filed April 14. 1928 5 Sheets-Sheet 2 ooooooo INVENTOR.

A TTORNE Y.

0st, 25, i932. E. E. KLEINSCHMxDT Y L883955 SELECTING TELEGRAPH 5 Sheets-Sheet 5 Filed April 14, 1928 l N VEN TOR4 www d? MM MMA A TTORNE Y.

Oct. 25, i932. E. E. KLElNscHMlDT 1,883,955

SELECTING' TELEGRAPH Filed April 14, 1928 5 Sheets-Sheet 4 000000 000000 OO OOOOOOOOOO i 13 fr? O oooooooooooc 3 INVENTOR.

4 BY MM wwe lg/wf ATTORNEY.

Oct 25, 1932# E. E. KLEINSCHMIDT 1,883,955

SELECTING TELEGRAPH Filed April 14, 1928 5 Sheets-Sheet 5 INVENTOR.

C wm/ d? B m, am, M0241 A TTORNEY.

Patented Oct. v25, 1932 EDWARD E. KLEINSCHMIDT, OF CHICAGO,

PATENT OFFICE ILLINOIS, AssIGNon, BY nnsNE ASSIGN- MENTS, TO TELETYPESETTEB CORPORATION, F CHICAGO, ILLINOIS, A CORPORATION OF DELAWARE Application led April 14,

The invention relates to selecting telegraphs and seeks to providean improved system and apparatus for rapidly effectingl the transmission from one station and the recording at a distant station of code signals such as required for effecting the operation of a type-setting or casting machine, and particularly a monotype machine that is controlled by a record strip ortapeperforated in accordance both withvcharacter signals, representing letters, numbers and punctuation marks, and also justiiication signals.

Further objects of the invention are to provide an improved transmitter adapted to be controlled by a perforated record strip such as is now used with a monotype machine and an improved receiver or recording perforator producing such a record strip, and also 'an improved code and system for use in connection with such apparatus.

In the `Inonotype system, the character signals are made up of thirty components. Each signal comprises two components, one selected from one group of-iifteen and the other from another group of fifteen and these signals are represented on the tape by transverse rows of holes. There are two holes in each transverse row, `each of which occupies any one of a group of fifteen possible punch positions disposed on opposite sides of the center of the tape and which may be designated for convenience, the A and B groups. Certain justiication signals include an additional third component represented by a hole in a sixteenth position on the B side of the record strip.

In accordance with the present invention the transmitting and receiving selectors which determine the signals sent and recorded respectively are divided into A and B groups and separate sets of permutation members of four each are provided, one set for each group of selectors and such members are adapted to be conditioned in different combinations to represent the two elements or components of the signals. Also, an 8unit code consisting of permutations of two different electrical conditions extending through eight successive time intervals or units is utilized, each signal being divided into two sets of four units sELnc'riNG TELEGRAPH 1928. Serial No. 289,883.

in correspondence with the separate sets of permutation' members and the two components of the different signals. Provision is thus made for sending and recording the large number of diiferent signals required with a comparatively short code. Means are also provided for transmitting and recording the specialthree component justification signals without increasing the lengths of the other signals.

The improved transmitter and receiver employed are provided with motor driven distributors which are maintained in proper phase relation by starting and stopping intervals or units which are transmitted by the sending distributor in vadvance of and following each code signal and which serve to initiate and arrest the receiving distributor at the beginning and end respectively of each slgnal period. f

The foregoing and other features of the invention as hereinafter more fully set forth, are illustrated in the preferred form and arrangement in the accompanying drawings and more particularly pointed out in the appended claims.

In the drawings,

Fig. 1 -is a diagrammatic representation of the improved system and apparatus.

Figs. 2 and 3 are plan and side views with parts shown in section of the improved transmitter.

Figs. 4, 5, and 6 are detailed views of the transmitter selectors. y

Figs. 7, 8, 9, and 10-are detailed views of the feed mechanism for the transmitter controlling tape.

Figs. 11, 12 and 13 are plan, vertical sections, and side views respectively, and

Fig. 14 is a horizontal section ofI the improved receiver or perforating recorder.

Figs. 15 and 16 are ldetailed views of the receiver selector mechanism.

Figs. 17, 18, 19 and 20 are detailed views i illustrating the operation `Yof the receiver recording and perforating devices and of the y is lifted.

regular monotype keyboard peri'orator. This strip has longitudinal rows of iieed holes at its opposite edges and is advanced step by step through a guide 11 to bring its transverse rows ozt signal holes over a series of transmitter selectors in the form o vertically disposed tape pins 12. 'llhe reduced ends of the pins extend into openings in the tape guide 11 and in a lower guide bar 18 and an additional guide bar 141 holds the pins against turning. f

individual springs 15 tend to lift the pins through the pertorations ot the tape when a common transverse resetting bar or bale 16 The latter is mounted on a horizontal shaft 1?' and is operated by a cam 18 on a main transmitter shait 19.

The tape is advanced step by step by feed wheels 2O arranged below the path oit the tape on a horizontal shaft 21 and the latter is actuated from a cam 22 on the main shaft 19 through the medium ot a feed lever 23 provided with a pawl 2li engaging a ratchet 25 on the iced shaft.

it the end oie each signal the cams 18 and 22 operate the resetting bale 16 and the 'feed lever 28 to depress thel tape pins that have been lifted, advance the tape to bring the next transverse row ot signal holes over the pins, and then permit the lifting movement ot the corresponding pins.

As' stated, the tape has two holes in each transverse row disposed on opposite sides of the center thereof, there being fifteen possible positions on the 'tape Jfor each of such holes. rlhe tape pins are correspondingly divided into A andv B groups and one pin of each group is lifted at each operation. i rll`here is also a third perforation in the transverse rows representing certain jiustiication slg- ,nals which permits the lifting of an additional tape pin 12 in the B group.

Separate sets of permutation members 26a and 26?) are associated respectively with the two groups of tape pins and each set of four. members is adapted to be conditioned by the group of tape pins associated therewith in a corresponding number of different combinations. In the form shown, each set of permutation members comprises four plates or bars arranged one above the other and pivoted to swing on horizontal axes. The permutation bars or members are spring-held in normal position and the tape pins are provided with code lugs 27 for shifting' the members in different combinations when the pins are lifted. The transmitter shown is provided with a sunflower distributor and the permutation members 26 are provided with a Contact 28 movable therewith and each arranged between frontand back contacts.

The distributor comprises a brush 29 mounted on the end of the transmitter shaft 19 and arranged to successively connect a Series of segmental contacts with a ring consucceeding signal.

ressens tact 30 and the main line conductor 31 which extends through a line relay 82 (see Fig. 1) at the receiving station.

The main transmitter shaft 19 is driven from a continuously operating motor 33 through gearing 34 and a friction clutch 35. A stop-start device in the form of an armature lever 86 cooperates with a stop disk 37 and, when engaged therewith, holds the transmitter shaft at rest with the brush en* gaging the stop segment 38. 'lhe stopl and start segments 38 and 39 are connected to the opposite pole-s of a divided line battery Ll0 and the segmental contacts 1 to l inclusive on the A side of the distributor and 5 to 8 inclusive on the B side are variably connected to the line battery by the corresponding sets et permutation members 2601I and 265. As shown, the segments 1 to 6 inclusive are connected directly to the corresponding permutation switches and the front and back Contacts ot the latter are connected to the opposite poles of the line battery. The segments Z and 8, which adect the transmisison of the last two units or intervals of each code signal,

may be similarly connected to battery by thecorresponding switches, but preferably they are connected to armature levers Zl1 having front and'baclr battery contacts and operated by relays l12 which in turn are connected to the corresponding permutation switches. Relays 12 are provided with armature levers 43 which control a locking circuit `for the relays from a local battery. This lockingy circuit is opened when the distributor brush 29 reaches or passes through its rest position by a cam il on the shaft 19 and which operates a releasing switch 45. Each revolution of the transmitting distributor from and back to its rest position, eliects the transmission of a signal comprising two li-unit permutations of positive and negative impulses or so-calledv marking7 and spacing pulses) in accordance with the setting of the groups of permutation members 26a and 2Gb, each signal being preceded and followed respectively by uniform starting and stopping impulses of different polarity. The relays 41 which store the last two marking pulses afford ample time for the restoring and resetting of the ermutation members during the latter portion of each signal period and before the transmission of the first selecting unit of the Obviously, if desired, the signals may consist of permutations of current and no-current units or intervals.

The special tape pin 12 does not position the permutation switches. Instead, when it is operated by a third or additional hole in a row of perforations of the tape, it lifts a bell crank lever 46 which normally enga es a shoulder on the hub of a gear 47. The fitter is mounted on a short shaft 48 which is driven, when the trip lever 46 is released by the special tape pin 12', from the main shaft iii 19 by a friction clutch 49 and a gear 50. The shaft 48 carries a cam 51 which operates a bell crank lever 52 and the latter serves to disable or prevent the feeding operation of the 'tape feed lever 23 and also serves when shifted to engage a pair of normally open contacts 53. The latter as shown in Fig. l, are interposed in the ener izing circuit of a relay 54 which is arrange to disconnect the main line conductor from the distributor contacts and connect it directly to the markin side of the line battery. rlhe cam 51, whic is driven at half the speed of the main transmitter shaft by the two-to-one gears 47 and 50, holds the cut-out lever 52 in shifted position only during the second half of its revolution. Hence, during the first half of the revolution of the cam, two i-unit permutations are transmitted as described under control of the two other tape pins which rise with the special tape pin l2. But at the end of such signal, cut-out lever 52 is shifted to prevent the feed of the controlling tape and connect the line to the operating or marking side of the battery during the succeeding revolution of the distributor and a code signal consisting o all marking units or intervals is transmitted. At the end of this signal, the Y lever 52 is returned to normal to permit the operation of the tape feed lever and again connect the line to the distributor contacts.

The recording receiver has a continuously operating motor 55 which drives a distributor shaft 56 and an operating shaft 57 (see Figs. l2 and 14) throughthe medium of sets of gears 58 and friction clutches 59. Startstop levers 60 icooperate with shouldered disks 61 on these shafts/and are controlled by mag-Y nets 62 and 63 respectively so that each shaft rotates through a single revolution when the corresponding start magnet is operated. A distributor brush 64 on shaft 56 is arranged to bridge a series of segments and a ring 65 `which is connected to the front contact of the line relay 32. The tongue of the line relay is arranged to connect a local battery 66 to its front contact upon the receipt of marking or operating signal units or intervals.

Magnet 62 is connected to segment 67 which is engaged in the normal or rest position of the brush 64 so that thelatter is initiated in operation by the starting unit of each sighal and successivelyy engages the segments 1 to 8 inclusive during the corresponding permuta- I ably comprises four notched bars, each longitudinally movable to either one of two positions to selectively align their notches in a well-known manner. Preferably, the permutation bars are held in normal position against the tension of shifting springs by latches 70 that are tripped by the selecting magnets 68. Restoring shift levers 71 operated by cams 71a and 7 1?) on shaft 57,v are provided for re-engaging the bars with the latches at the ends of the operation of each set. The alignment of the notches of the permutation bars determines the o erative setting of one each of two groups o punch selectors 72a and 7 2b lduring each signal period. These selectors, in the form shown, are disposed in horizontal position above the permutation bars and the operating shafts and are pivotally connected at their rear ends to the upper ends of a set of levers 72. The y punch actuating bars or bales 78. The

punches are mounted in a block 79l which, together with an upper die block 80, forms a guide for a recording strip or tape 81. The

punch actuators are operated by cams 7 8a and 78?) on the shaft 57. l

Magnet 63 which controls the operating shaft 57 is operated by a brush 82 which bridges contacts 83 interposed in its energizing circuit at the end of a,half revolution of the distributor or at the end of the setting of the permutation bars 69a. rlhe cams 73a,

7 8a, and 71a then operate the shifting, punch actuating, and restoring bars 73, 78and 71 of the A side of the recorder and efects'the operation of a selected punch in the A group. Also, since the cams 7311, 782'), and 716 are dsposed 180 degrees behind those of the A side, they similary effect the operation of one of the B punches after the setting of the permutation bars 696. Thus, the selecting and operating cycles for the two groups of recorders or punches overlap; that is to say,

lthe selection of one of the B punches is effected during the operationl of the selected recorder or punch of the A group, andthe selection of an A recorder can be eiectedby the initial v4unit permutation of the succeeding signal during the operation ofthe B recorder selected by the preceding si al.

. It is only necessary that the .operating s aftv 57 shall complete the operation of both sides Vof the recorder in response to any signal before its controlling magnetis energized during the mid-portion of the succeeding signal., The' record tape or strip 8l is advanced upon the return stroke of the B punch actuay f tor 79 y.b means of a spring pressed dog 84 h D tem or method of sending and recording sigmounte on the B punch actuator and arranged to engage a pin on the operating lever of a pawl and ratchet feed mechanism. No feeding movement of the tape however, is ei ected upon the operation of one of the A unches so that the holes successively formed y the A and B punches selected by each signal, are aligned in a single transverse row across the tape.

kThe transmission ot special three compo nent justification signals is erlected as described during two successive rotations of the distributors, the irst rotation serving to select and e`ect the operation oil one of thevA and then one. of the B punches, and then advance the record strip one step. During the succeeding rotation of the distributors, the transmitting distributor is disconnected from the line as described and the latter is so controlled by the magnet 54 that the tongue of the line relay is maintained against its front contact so that all of the selecting magnets are operated. The resulting setting of the A and B permutation bars edects the selection only of the special punch controller or selector72 of the B group and which is arranged to eect the operation of a special punch 77. The latter is forwardly oll'set as indicated in Fig. ll so that the hole punched thereby aligns with the previously formed A and B holes of the special justification signal.

The selector 72 is also provided at its end with a projecting pin 86 which is arranged to disable or prevent the operation oit the dog 84C by engagin it and shifting it as shown in Fig. 2O so t -at there is no feeding operation of the record strip after the operation ofthe special punch. 'llie arrangement described permits the .transmission and recording of special three component signals without increasing the lengths of the periods required to send and record most ot the signals which consist of two components only.

As usual in start-stop telegraph systems, the operating motors are governor controlled to maintain uniform speeds oie the respective sending and receiving distributors. Preferably the stop arml oi2 the sending distributor is held in operative position by a normally energized magnet 87, so that the sending distributor operates continuously and is not arrested in its normal position unless the circuit of the magnet 87 is opened hy a switch 88. The latter can he operated manually to start and stop the sending ol3 signals and also by a loop of the transmitter controlling tape 1() to prevent breaking of the tape as it is delivered to the automatic transmitter from a keyboard perorator. Preferably also, to insure the stop of the receiving distributor at the end of each'signal and itsstarting in place with the succeeding signal, it is driven at a speed slightly faster than that oithe sending distributor.

rlhe invention provides an improved sysnals in accordance with a code comprising thirty elements or components for the character signals, with an additional element for justification, by means of a relatively shorter code comprising only eight elements, or ten, if the preferred start-stop system is employed. lt is also noted that each complete transmittedsignal is compound and in etlect comprises two separate signals or code combinations, one for each component of the original code.

The improved transmitter and recording perforator are simple and compact, the parts being mounted on base boards 89 between side brackets 90 and below the paths of the'tapes. But numerous changes may be made Without departure from the scope of the appended claims. y

l claim as my invention:

l. ln a telegraph system, the method of. sending and recording signals each consisting of, one of each of a plurality of groups of components, which comprises successively transmitting, during each signal period, a plurality of definite interval permutations of two different electric conditions, one permutat'on for each component of the corresponding signal and separately selecting and recording the individual components of each signal in response to said permutations.

2. ln a telegraph system` the method ot sending and recording signals normally comprising two components and special code signals comprising three components, which consists in transmitting two deinite interval permutations of two different electrical conditions during each normal signal period and a certain detin'te signal during each of a' y number of special signal periods of normal lengths, and selecting and effecting the operation ot oneeach of two groups of recording devices in response to the permutations of each normal signal period and of a special recording device in response to each ot said definite signals.

3.'lln a telegraph system for reproducing a perforated record strip having two groups ot possible hole positions extending transversely of the strip and transverse rows of holes each having one hole in each of such groups and certain special rows having an additional third hole in a definite position, means for transmitting, under control of the tape, two definite interval code permutations during each normal signal period and a delinite signal during each of a number of special signal periods, and a receiving perforator having two groups of punches and a special punch and two sets ot permutation members for selectively controlling the operation ot lll@ . tuating means of the respective groups and said feed mechanism in mined order.

5. in a telegraph receiver, a plurality of recording devices divided into groups, a set of selectors and an actuator individual to each group of recording devices, a common successive predeterrecord feeding means, and means, responsive to received signals and including a common operating mechamsm for said actuators and said feeding means, for successively operating the selectors and actuators of the different groups of recording devices andfor finally operating the record feed mechanism.

6. llna telegraph receiver, a plurality of recording devices divided into groups, a set of selectors and an actuator individual to each group of recording devices, a common recordfeed mechanism, a common distributer and associated electro-magnetic means for successively conditioning said sets of selectors in different combinations, and means controlled in operation by said distributer for successively operating said actuators and for finally operating said common record feed mechanism. l

7. A recording perforator comprising two groups of punches and corresponding punch selectors, a separate set of controlling permutation members and a punch actuator for each group, a distributer and 'electro magnetic meansvresponsive to received definite interval code permutations for successively conditioning the set of permutation members in different combinations, and means controlled by said actuator for effecting the operation of the selected punch of each group during the selection of the punch of the other group.

8. A recording perforator comprising two groups of punches and corresponding punch selectors, a separate set of controlling ermutation members anda punch actuator or each group, a distributer and electro magnetic means responsive to received definite interval code permutations for successively conditioning the sets of permutation members in different combinations to select one punch in leach group in" response to each received signal, and means initiated in operation by said distributer for successively operating said actuators and arranged to effect Athe overlapping of the selecting and operating cycles of the two groups.

9. In a. recording strip perforator, a. plungroup, a distributer and electro magnetic means responsive to receive definite interval code permutations for successively conditioning the sets of permutation members in diiferent combinations, to select one punch in each group in response to each received signal, means initiated in operation by the distributer for effecting theV successive operation of the punch actuators and a tape feed mechanism individual to and operated by one of said actuators.

11. ln a telegraph receiver, a plurality of punches, individual punch selectors, tape feed mechanism, an actuator for the punches and said feed mechanism, and a set of permutation members for selectively controlling the operation of the selectors in response to received signals, one of the selectors being arranged to disable said feed mechanism.

12. In combination in a telegraph system, a tape controlled transmitter, a tape perforating receiver having a series of punches, said transmitter and receiver having tape feed mechanisms and corresponding series of signal and punch controlling selectorsy respectively, and means controlled by certain corresponding transmitter and receiver selec- -tors for disabling said feed mechanisms.

13. Av telegraphic ltape recorder having means for selectively punching a definite number of holes disposed in a rowv across the tape in response to each ordinary signal and means for punching an additional hole in a previously formed row in response to a special signal.

14. In a tele aphic tape recorder, a stepby-step tape eed mechanism, a series of punches disposed transversely of the path of the tape, and a special punch one step in advance of the others, corresponding punch selectors, an actuator for operating the selected punches and'said feed mechanism, and means for disabling said feed mechanism controlled by the special punch selector.

15. In a selecting telegraph, a series of transmitting selectors adapted to be .controlled by a tape having transverse rows of holes, corresponding series of receiving selectors and punches controlled'thereby for reproducing the transmitter controlling tape, transmitter and receiver tape feeders and means for normally operating said feeders at the end of each signal period, one each of said frg series of selectors being arranged to disable said feed mechanism during certain special selectors disposed transversely of the path of ,successive signal periods.

the tape and normally selectively positioned during the successive periods by cross rows of perforations of the tape, a tape feeder. and means normally operative at the end of each signal period for actuating said tape Jfeeder, one of said selectors being arranged to disable said tape `feeder to permit the selectors positioned by each of certain transverse rows of the tape to control the transmitted signals during two successive signal periods.

17. In selecting telegrams for controlling telegraphic machines, a tape controlled transmitter having a series of signal controlling selectors disposed transversely of the path of the tape and normally selectively positioned during the successive periods by cross rows of perforations of the tape, and a perorating receiver having corresponding vseries of punches and punch selectors normally selectively controlled to form a transverse row of holes on a record tape during each signal period, tape feeders -for the sending and receiving tapes, and means for normally operating said Jieeders at the end of each si gnal period, a special one of `the selectors of each series being arranged to disable said feeders, whereby the transmitter selectors are controlled by and the receiver punches form a single row of tape holes during two 18. In a telegraph system, the method 4or" sending and recording signals according to a code comprising a relatively large number of components, which consists in translating and transmitting each of such signalsin a compound signal of a di'erent, deiin'ite interval code comprising a substantially smaller number of units or components and having each of said compound signals formed oi? .separate portions corresponding respectively to the components of the original signal,

and translatingthe transmitted signals into the original code and recording the same.

19. In a telegraph system for reproducing a perforated record strip having a pluralityof groups of hole positions extending transversely of the strip and transverse rows of holes each comprising one hole in each of such groups, means for transmitting', under control o the tape, a plurality oit detinte interval code permutations, one tor each of the holes in the corresponding row, during each signal period, and a receiving perforator having a corresponding number of groups lot punches and sets of permutation members for selectively controllingfthe' operation of one punch in each group in response to the corresponding permutations. of each signal.

rasante 20. In a telegraph system for reproducing a perforated record strip having two groups of hole positions extending transversely oi the strip and transverse rows of holes, each row formed of one hole in each of said groups, a transmitter and a receiving perforator each having two sets of permutation members, means controlled by the tape for selectively positioning the sets of ltransmitting permutation members in different combinations, and

the original signal, and translating the received signals intothe original code and recording the same. l

22; In a telegraph system, a plurality of groups oftransmitting selectors, means common to said groups of selectors for conditioning ythe same in different combinations to select combinations of code impulses, common' distributor means for successively imparting the selected impulses to the line, corresponding groups of receiving selectors, a common distributor means and cooperating electro-magnetic means for setting the receiving selectors in response to the received sigico nals and a recorder common to and controlled Y by said groups of receiving selectors.

23. In combination in a telegraph system, a transmitter comprising a plurality o groups ot selectors and common means for conditioning said groups of selectors in VVdifferent combinations, a receiving recorder comprising corresponding groups of selectors and actuating and record feeding mechanism common to said groups, and a common distributor and associated electromagnetic means for conditioning the receiver selectors in response to the received signals..

said distributor being arranged to control the operation of said actuating and record feeding mechanism.

24. I he method of code transposing which consists in assigning to each element of a. signal of a code comprising a large number of elements a separate combination of elements of a signal code comprising a substantially smaller number of elements, transmitting said separate code combinations and thereafter translating the same into the ordinary code signal and recording the same.

25. In a telegraph system, means to transmit a series of groups of signals, means for perorat-ing a strip of material in a transverse line according to one of said groups of signals, and means to provide in any transverse line, an eXtra perforation under the control of another group of signals.

26. In a telegraph system, means to transmit a series of groups of signals, meansfor perforating a strip of material in a transverse line according to one of said groups of signals, and means to add to any transverse line an eXtra perforation under the control of a succeeding signal. l

27. In a telegraph system, a tape having transverse lines of perforations, means to control the transmission of a complete code signal by a single perforation in one location in a transverse line, and means to send varying code signals according to the remaining perforations in said transverse line.

28. In a telegraph system, a transmitting distributor, means to transmit a series of code signals, a tape containing groups of transverse perforations, certaingroups adapted to control the signal during a single cycle of operation of said distributor, and certain of said groups of perforations being adapted lto control the signals transmitted during two cycles of operation of said distributor.

29. In a telegraph system, means to transmit a succession of permutation code signals, means for forming perforations in a strip of material yaccording to said permutation signals, means to normally feed the strip for-` Ward after each complete perforating operation, and means controlled by certain signals to disablesaid feeding means.

30. In a telegraph system, means to transmit a succession of permutation code signals,

means for forming perforations in a strip of material according to said permutation signals, means to normally feed the strip forward after each perforation operation, and means controlled by a certain signal to make an additional perforation, said perforation associated with the perforations made by certain of said other signals to render said certain other signals complete,

31. In a telegraph system, an automatic transmitter, perforated tape to control said transmitter, groups of perforations in said tape, means normally operative to control the transmission of a permutation code signal by each group and means controlled by certain groups to send two permutation codeisignals.

32. In a telegraph system, a tape having a series of transverse lines of perforations, a.`

distributor, means to transmit during a complete cycle of said distributor a signal controlled by a single perforation in a line, and means to transmit during another complete cycle of said distributor a signal controlled by all the remaining perforations in such line. v, A v

33. In a telegraph system, a receiving device, a tape having groups of perforatons disposed in transverse line, means to transmit signals varying according to the perforations in a group, a special perforation associated with certain groups, means to transmit under the control of said special perforations an invariable signal similar in character to said varying signals, and means controlled by said special signal to change the response of transverse rows7 of perforations.

EDIVARD E. KLEINSCIIMIDT.

lli

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