US2403441A - Telegraph system - Google Patents

Description

July 99 1946. F. s. KINKEAD 2,403,441

TELEGRAPH SYSTEM Filed Aug. 26, 1942 PLM: Lms. 1N/u Pou/17250 PULAR/ZED /N VEN TOR R/ 7.21 S K/NKEAD HAS` ADM/N/S TRA TR/X gyn/MEW.

A 7' TOR/VEV Patented July 9, 1946 UNITED STATES PATENT OFFICE TELEGRAPH SYSTEM Application August 2,6, 1942, Serial No. 456,149

12 Claims. 1

This invention relates to telegraph systems and more particularly to receiving station circuits and equipment.

It is frequently desirable to transfer telegraph messages from one line or system to another line or system, which systems or lines are so arranged that it is impossible or impractical to repeat the messages from one system to another by means of the usual type of telegraph repeating instruments due to the fact that the lines operate at different speeds or due to the fact that various types of supervisory signals or circuits are required for each of the systems which may or may not be the same, Such systems frequently are unable to transmit to other systems through the usual type of telegraph repeater, for example, due to the fact that one system may not be prepared to'receive messages when the messages are transmitted from the other system. Under these and other circumstances it has been the practice to receive the signals on a reperforating instrument and thus store the signals for transmission over any other desired line or system at a later time. In some instances a storage controlled transmitter which usually takes the form of a tape control transmitter is associated with the reperforator unit and the tape passes from reperforator unit directly to the transmitter unit. In other cases it is desirable to remove the tape from the reperforator and carry it to some transmitter for transmission over a desired line.

In order to insure that the entire message will be transmitted when required or that the entire message can readily be removed from the reperforator it is necessary to make some provision for advancing the tape out of the reperforator, In the past this has been accomplished either manually or by providing a special reperforator unit to enable the recording medium to be advanced through the mechanism when no signals are being received. In accordance with the present invention an improved arrangement is provided in which it is unnecessary to provide a special reperforator unit or to incorporate additional elements in the reperforator to cause it to feed out additional tape,

In accordance with the present invention circuits and relay equipment are provided adjacent to and at the same location as the reperforator locally generated signals form no part of any 'message received by the reperforator 'and need not be added to the message as subsequently transmitted. Signals of this type are sometimes called non-intelligence or non-message signals which terms, for the purposes of this specification and the claims appended hereto are used to describe and designate any signals or permutation code groups of pulses which do not form a part of the subject-matter of any message as transmitted from the station of origin and recorded at the station of ultimate destination thereof. Due to the characteristics of the different code combinations generally employed to actuate the reperforator and other telegraph apparatus and due to the functions and symbols represented by the respective code combinations, certain of these code combinations are considered more desirable than others to be generated locally for advancing the recording medium through the recording instrument. In accordance with the specific embodiment of the invention described herein, circuits are arranged to generate the socalled letters signals which comprise a spacing start pulse followed by ve significant selective pulses and a stop pulse, all of which are marking.

Preferably in accordance with the present invention, circuits are so arranged that it is necessary to precede each message by one or more letters signals for properly conditioning the reperforator and insuring that it will properly receive the message to be transmitted to it. These signals are followed `by the message proper after which an end-of-message signal is transmitted over the line to the reperforator.

The end-of-message signal conditions the local circuits so that if an associated tape controlled transmitter transmits all the available tape a group of letters signals will be generated locally and supplied to the reperforator for an interval of time sufficiently long to insure that the entire message will be transmitted by the associated transmitter.

If no tape controlled transmitter is associated with the reperforator, then the end-of-message signal will condition the circuits so that the operator may cause the reperforator to advance the recording means through it by operating a special key, In this case also circuits operate sufficiently long to insure that the entire message will advance out of the reperforator.

When desired, manual control may also be provided when an automatic transmitter is associated with the reperforator.

The local generation of the signals for advancing the recording medium through the repertorating instrument is interrupted in the event that the additional signals are received over the line, thus insuring that the local generation of signals whether started manually or automatically will not in any way interfere with the reception of succeeding messages transmitted to the storage or reperforator unit.

The foregoing object and features, as woll as other objects and features, of the present invenI tion may be more readily understood from the following description when read with reference' to the attached drawing whichshows inv detail one specic embodiment of the invention. It is tobe understood, however, that the invention as denned in the claims appended` hereto is not tcbe limited in any way to the specific embodiment described herein. f

In the specific embodiment of this invention shown in the drawing the relays are normally maintained in the position` shown in the drawing. Current ii'ovving throughv the: upper windings of relays E=2fand23 and the lower'w-inding cf relay 2i) maintainsthe armatures of these relays in their markingpositions; that' is in the positions shown inthe drawing.

The selector magnetl Ilof` the reperforator SI is maintained operated'in acircuitextending from ground-A throughz its winding'` and the left-hand inner break contacts of relay ZI to battery, thrcughthe right-hand' Contact and armature of relay 23. Relay If4= is maintained inv its marking position. as shown in'` the drawing so long as a marking condition isA received over line I9,

Normally the motor of the transmitter I2, as illustrated at 42-'inrthedrawing, is connected to source of power through the closed switch lli and is continuously'operating. In a similar manw ner amotor for operating the reper-forator II, not shown in-tliedrawing, is connectedto a source of-powerandlcontinually operating as is well understood by those skilled in the art.

As pointed; out above, the first signals transmitted over line lvtothefrecording instrument II will generally comprise one or more letters code combinations. Relay; I4' willvrespond to these code combinations andfcause its armature to moveto itsspacing contact in response tothe reception of thespacing startpulseof this code combination. As iS Well understoody by those skilled inthe art, every start-stopY code combinau tion is preceded by a spacingstart pulse. Consequently, the armature of relay Ilifwil move to its left-hand positiony at the beginning of any code combination received over line I0, it being understood that while this,v invention is not so limited the specific embodiment ofthis4 invention described hereinis adapted vfor use in telegraph systems employing these-called start-stop method of synchronizing;

When the-armature of relay I4 moves to its-left hand position an obviousl circuit is completed through'the upper winding of relay 2t, the current through which overcomes the effect of the current flowing through the'lower winding of this relay and causes-its armature Vto vmove 4to its spacing or left-hand position. The operation of relay to its left-hand position completes av circuit for the operation of relay 32f from battery through the winding of relay 32, theleft-hand break con tacts ofrelay 2B .to ground `through the'left-hand contact and armature offrelay'20'. The operation of relay 32-f prepares a circuit for the operation of relay 29A and'forv maintaining itself operated which circuit becomes effective upon' the operaing circuit of relay 32 and completes a circuit for maintaining itself operated from battery through its winding and left-hand operated contacts to groundth'roughthe left-hand contact and armature of relayZIl. Relay 28 is slow in releasing so that it will r'e'mainoperated due to current flowing in the circuit through the left-hand Contact and rarmature of relayv 20 during the time relay 20 is following the signals received over line I0 and repeated by relay I4 to relay 2U.

The operation of either relays 23 or 29 completes a circuit for the operation of relay 2| from battery through the winding of relay 2| to ground, through the operated contacts of either relays 23 or 29.

The operation of relay 2l transfers the circuit of the selector magnet I9 of the reperforator Il from the contacts of relay 23 to the contacts of line relay I4. Consequently, thereafter the selector magnet I9'will follow thesignals transmitted over line I0. One or more letters signals transmitted preceding the message is required in order to allow sul'licient time for the various relays described above to operate, as well as tov allow sufiicient time for stopping the automatic local generation of signals as will-be described hereinafter.

Thereafter the circuits Will remain in the position describedA during the remainder of the reception of 'the message.

During the operation of the reperforator II, contacts I8 close once during the reception of each and every code combination received by the reperforator II. The circuit of these contacts, however. is open at the right-hand operated contacts of relay 29'at this time so that the closure `of these contacts during the reception of a message performs no useful function. Contacts I1 are closed by the selector of the receiving device Il in response to the reception of a letters code combination. In other words, contacts I1 open once in response to the receptionof each letters signal received by the reperforator I I. Similarly, contacts I 5 are momentarily operated once by the reception of each code combination usually employed to represent the letter I-I. Each of the contacts I5, l1 and I8 are operated momentarily in response to the reecption of the respective code combinations by the selecting mechanism of re perforator II. Contacts I6, however, are operated in response to the reception of a figures code combination and remain operated until a letters code combination is received which causes the contacts to be restored or closed as shown on the drawing. In addition to the closure of contacts IB'in response to a letters signal, the selecting equipment is frequently arranged to cause contacts I6 to close in response to the reception of a space code combination. While these contacts, as described above, are arranged to be actuated in response to the speciiically enumerated code combinations, it wil] be readily apparent to those skilled in the art that any other suitable cod combinations may be employed to control these contacts.

For a more detailed description of typical So long' as these contacts' are individually operated, as described above, the switching circuits controlled by them are not actuated. However,

when a figures code combination is followed by an H, code combination, the locking circuit of relay 32 and the operating circuit of relay 29 is interrupted, thus permitting these relays torelease. Contacts I6 are opened in response to the reception of the gures signal and remain open until closed by a letters or spacing signal. Contacts I5 are momentarily opene'din response to the H signal so when the H signal follows a figures sig; nal when no letters signal or spacing signal is interposed between them the circuit of relays 29 and 32 is interrupted.

Relay 29 in releasing interrupts the operating circuit of relay 28. If additional signals are received over line I following the gures and H code combinations, relay 28 will be maintained operated due to current owing through its Winding and its left-hand operated contacts to ground through the spacing contact and armature of relay 20. As described above, relay 20 follows the signals transmitted over line I0 and maintains the circuit through its left-hand contacts closed for a sufficiently great proportion of time during the reception 0f signals to maintain relay 28 operated. I

The first signal following the figures and H signal which is not a letter signal will again complete a circuit for the operation of relay 32 from battery through the winding of relay 32, the right-hand break contacts of relay 29, the momentarily operated contacts |8, contacts I1 to ground through contacts I5 and I6 in parallel. Relay 32 in operating again prepares the above described circuit for the operation of relay 29 and for maintaining itself operated which circuit becomes fully effective when contacts I8 open. Thereafter, the circuit remains in the above described condition throughout the remainder of the reception of message signals by the reperforator I I.

If, however, no signals are received immediately following the figures signal and the subsequent H signal, the release of vrelay 29, as described above, in response tothe reception of these two code vcombinations interrupts the operating circuit of relay 28. Underthese circumstances, the armature of relay 20 will be maintained in its right-hand position as shown in the drawing where it interrupts the locking circuit of relay 28. Consequently, a short interval of time after the release of relay 29, relay 28 will release. The release of relay 28 at this time interrupts the op erating circuit of relay 2|, thus permitting relay 2| to release. Relay 2| in releasing transfers the operating circuit of the selector magnet I9 from the contacts ofrelay I4 to the Contacts of relay 23.

Thereafter, the circuits remain in the condition described unless additional signals are received over line III in which case the circuits operate as described above. If the tape controlled transmitter I2 isv supplied with tape I3 from reperforator II, transmitter I2 will generally continue to transmit the signals stored in tape I3 until the supply of tape between the reperforator II and transmitter I2 is" reduced to some predetermined minimum quantity at Which time contacts 48 are y opened. v l

In order for the transmitter I2 to transmit, an operator or attendant closes switch '39 which completes an obvious circuit from a source of power 38 through the winding of start magnet l4If which magnet releases the transmitter shaft 434 Illl by 'this time, a circuit will be completed by the release of relay 31 fory the operation of relay 38 from battery through the winding of relay 30, the break contacts of relay 3l, theleft-hand break contacts of relay 3| to ground through the righthand outer'break contacts of relay 2|.

Relay 38 lin operating completes a circuit for, maintaining itself operated from battery throughy its winding and left-hand operated contacts to ground through the left-handA break contacts'of relay 3| and the right-hand outer break contacts of relay 2 I.

Relay 30 in operating removes negative battery from the right-hand terminal of condenser 35 and grid of tube 34 and connects negative battery to the filament of tube 34. The filament of vtube 34 is thereby energized but tube 34 will not pass suicient anode current to cause relay 33 to operate at this time due to the high negative potential of the right-hand terminal of condenser 35. The constants of condenser 35, resistance 36, as well as the constants of tube 34 are such that it requires an appreciable period of time, say of the order of l5 seconds, for the high potential of the right-hand terminal of condenser 35 to discharge through the high resistance 36 sufliciently to permit sufficient anode current to ow through tube 34 to operate relay 33. A more detailed description of the manner of operation of the time measuring or time delay circuit of this type is disclosed and the novel features thereof claimed in a copending application of Hopper, Serial No. 407,410, filed August 19, 1941, now Patent No. 2,327,791, granted August 24, 1943, which application is hereby made a part of this present application as if fully included herein.

The operation of relay 30 connects ground to the armature ofrelay 22 which, in turn, reverses the current flowing through the upper winding ofrelay 22 so that the current now flows from battery 49 through resistance 50, the upper winding of relay 22, and the left-hand contact and armature of relay 22 to ground through the righthand inner break contacts of relay 2| and the .right-hand inner operated contacts of relay 30.

This reversed current flowing through the upper winding of relay 22 tends to operate the armature of this relay to itsright-hand position but 1 termina of condenser 24 through lower ,winding` of relay 22; Hence, condenser24 will discharge through the' lower winding'of relay 22 in such a direction as to maintain the armature of relay 22 inthe position shown in the drawing. The constantsof condenser 24, Ythe resistance of the lower winding of relay 22 and the constants of this relay are such that itrequires an appreciable` the' left-'hand contacts' of this relay' and thus restores the current flowing through the` upper windingo'f' this relay to its normal direction,

Wheref'this'current will tend to operate the relay tothe position shownin the drawing. However,

at thistim'e; condenser 24 will start to charge to' battery potei'iti'al through thelower winding of relayr22. The charging current of condenser 2d@ will produceoaneifect upon the armature of this relay which overcomes the effect of the' current flowing through the upper winding of this relay for an appreciableinterval of time. When relay 22V finally operates te its left-hand position the above4 cycleof operations will be repeated.

During the interval of time the armature of relay 22 remains in its right-hand position it connects ground tothe left-hand winding Yof terminal of the lower winding of relay 23.' APriorA tothe operation or relay 22 to its right-hand position, battery was connected to the left-hand terminal of condenser 21 throughthe lower winding of relay 23.

winding of relay 23, condenser 21 will start to discharge through the lower winding of relay 23 and overcome the eliect of the current flowing throughthe upper winding of this relay and opcrate the armature of this relay to its left-hand position where it interrupts a circuit to the selector magnet IS At a later interval of time, either condenser will become suiiiciently discharged or relay 2,2`will operate in the positionshown in the drawing, as described above. When ground is disconnected from the left-hand terminal of the' lower winding of relay 23, condenser 21 will start to charge to battery potential throughthis Winding and cause relay 23 to be operated'to the p0n sition shown in the drawing or maintainedin this position if it was previously operated by the current flowing through the upper winding oi' this relay when condenser 21 became sufliciently disclfiarged. This relay is then maintained in this position by current flowing through itsupper winding, as described above,

The constants of relay 22, as well as the values of'resistances 50 and 5I are so chosen that relay 22`r'emains in the position shown in the' drawing for 'aV greater Aproportion of the time and is op-A erated to its right-hand position for only a'sm'all proportion of the time. interrupts a circuit of the selector magnet I9 for only short intervals of time followed'by appreciable longer intervals of time duringrwhichV al circuit oi the` selector` magnet is vclosed. The constants of condensers 24v and 21 andthe resistances of the windings of relays 22 and 23 and the adjustment of kthese relays, as wellas the values of resistances 5,0 and I, are so selectedthat relay- 23 interrupts `thiefcircui-t ofthel selector magnet for" a time interval sufficiently' Upon the connection of ground to the lefthar1d winding terminalA of the lower' Consequently, relay 23" long for the selector magnet I9'I to"- interpret this interruption as a start signal. Thereafter, relay 23 completes a circuit for the selector magnet I9' and maintains this circuit clo's'edsuiciently long so that thev selector magnet I9A interprets the following circuit closure asl 'a letters signal. Thereafter, the above described operation is re-V peated and a series of letters signals generated' and suppliedt'o the selector magnet I9. The selector magnet I9 in responding to these signals causes the tape' I3 to be advancedythrough the recording device I'I- so'that the end ofthe nies-d sage which was still within the reperforator il will be advanced out of this mechanism and through the transmitter I2. If for any reason the signals generated byrelays 22 and 23 are interpreted by `the reperforating mechanism ,I i' as any signal other than a letters signal, acircu'it .will be completed for ythe operation' of' relay' 32 from battery through the winding of relay- 32, ther right-hand break contacts'of relay 29`to ground through theuniversal contacts lIand the letters' contacts I1 to ground through contacts I5 and I6. This circuit is not kcompleted in response to letters signals received bythe selector magnet i9 during normal operation because the letters contacts I1 opena short interval of time before the universal contacts close and the universal' contacts open a short interval of time before the contacts'` Ilreclose. However, whenv any signal other than letters signals is received by the selec'-i tor magnet I9 at this time,V the above described' circuit through the letterscontactsjand universal contacts is completed forY the operationjof' relay 32 becausethe letters contacts will not open in response to any signalsexcept letters signals, Relay 32.A operates and upon the opening' of the universal contacts I8 a circuitis completed' for the' operation of relay 29and for maintaining relay 32 operated as described above. RelayI 29' in'operating completes circuits for the operation of relays 28 and 2|, The Operation Of'relayA 2| interrupts the localgeneration of letters signals and restores the circuits to their normal or idleV conditioninl the same manner as describedv heref in when ,signals are received during'the automatic generation of letters signals for advancinguthey recording medium I3 through the re'perforator I I'.

Thel operation of the` circuitsv in Y generating letters signals and causing'thev tap I3 to be ad vanccd out oi the reperforator I I continues under normal conditions during theY discharge time of condenser 35, as described above; At the' vend Vof the time interval measured by the discharge circuit of condenser 35 'and' tube 34, relay 33'will' operate and complete a circuit for the operation of relay 3| from batteryU to the windingand right-hand break contacts vof'rela'yk 3l to gr'ound through the loperated contacts of relay 33.

lIt frequently 'is desirable to extend the circuit from theA contacts of relay 33' throughan additional interrupter to ground' or ythrough some other switching circuits which contacts and circuits are indicated bythe dotted lineextending betweenjthe armatureV of relay 33andigrou`nd."

When ground'is applied to lthis circuit, relay 3| operates and completes a circuit'formaintaining' itself operated from battery'through itswinding and right-hand operated" contacts tok ground through the" right-'hanlibreak contacts ofi relay 2 I: The operationof relay 3`I alsointerrupts'both the opera-tingfandlocking :circuits of relay 30', thus permitting*relayf30vto release. `Th` release'A of y relay'3ll disconnects ground from the armature" is restored to theposition shown in theV drawing and the armature of relay 23 operated to its righthand position. The release of relay 30 also restores the circuit of condenser 35 andftube 34 to their normal or idle condition. Thus, the. generation of letters signals is interrupted and thereafter the circuits remain inthe condition de-y scribed above until. additional signals are received restore thecircuits and relays involved in the generation of the letters signals to theirnormal or idle condition. Inasmuch as the .selector lmechanism of the reperforator I I may not be in its 4idle or normal condition when these signals Aare received, it is desirable to precede the message by one or more letters signals'to insure that-the selector mechanism will be synchronized with the incoming signals and be in condition to properly respond to the rst code combination of themessage being received. In case tape I3 is not supplied to a tape con trolled transmitter I2 or in case it is desired to detach it from the reperforator II and carry it to some other transmitter, the operator or attendant may wish to manually cause the reperforator II to advance vthe tapel3 through the mechanism so that the entire message may be removed from the machine. For this purpose, a 'key- 5l is provided which the operator may operate after a gures H signal at the end of a message has been received and, if n o further signals arereceived at this time, the operation of key 51 serves the same purpose as the release of relay 31, as deof said invention and described herein.

scribed above, and causes the mechanism to automatically advance the record medium I3 through the mechanism. At the end of the time interval measured by condenser 35, resistance 36 and tube 34, the automatic generation of letters signals is interrupted and the circuits restored to their idle condition as described above.

The circuits of transmitter I2 may be arranged to discard the additional letters signals perforated in tape I3, as is understood by those skilled in the art.

Details of suitable types of reperforating mechanisms are disclosed in United States Patents 1,884,743, granted to Kleinschmidt on October 25, 1932; and 2,042,788, granted to Krum on June 2, 1936.

It is also apparent to those skilled Yin the art that the mechanism II may comprise a printing reperforator such as is described in United States Patents 2,273,909 and 2,273,910, granted to Swan on February 24, 1942; and 2,255,794, granted to Lake on September 16, 1941. All of the aboveidentified patents are hereby made a part of this application as if fully included herein.

In case a printing reperforator is employed, it is frequently desirable to arrange the printing and perforating mechanisms and to select the signals generated for automatically advancing the record medium through the mechanisms so that no symbol or character is printed upon the record medium by the mechanism in response to the signals generated by the local circuits for advanc- 10 ing the record medium through the receiving instrument.- t

Underother circumstances, it may be desirable to cause the printing'mechanism to print some predetermined specic character or symbol which forms no part of any message when transmitted after messages `such as a period, dash, or any other suitable letter or symbol, as will be readily apparent to those skilled in the art.l

Furthermore, the invention is not limited to the employment of any particular time measuring device as; disclosed in the specific embodiment In addition,v it may be desirable to arrange the timing circuits of relay 22 so that they may be readily adapted for use` in' cooperation withv receiving reperforators operating at different speeds. For thispurpose, the condenser 25 and switch 26 has been included. l When the switch 26 is closed, condensers 24 and 25 are connected in parallel, thus further delaying the operation of relay 22 and adapting a circuit arrangement including vthis relay and relay 23 Vto generate signals at a lowerspeed than when switch 26 is open, as shown in the drawing.

What is claimed is: Y f

,1. In a telegraph system, av channel of telegraphic transmissionfa recording instrument for recording permutation code signals received over said channel upon a recording medium, and apparatus for generating a plurality of predetermined code combinations for advancing said medium through said recording instrument and means jointly responsive to received signals and to the demand for said record medium from said recordinginstrument for conditioning for operationsaid apparatus for generating a plurality of predetermined code combinations.

2.V In combination, a permutation code-receiv- -ing instrument for `perforating tape in accordance with received Vpermutation codes having a selector magnet. for controlling said receiving instrument, a local circuit for the operation of said selector magnet, apparatus for repeating received signals to said local circuit, and other apparatus for generating letters signals within said local circuit, and means for interrupting the operation of said apparatus for generating letters signals upon the operation of said repeating apparatus.

3. In combination, a telegraph signal storing device for storing signals in a medium, a circuit local to said signal storing device for controlling the operation of said signal storing device, apparatus for repeating signals to said local circuit, means for generating predetermined signals in said local circuit, and means responsive to signals in said local circuit other than said predetermined signals for interrupting the operation of said means for generating predetermined signals.

4. In combination, a telegraph printer for printing symbolson a record medium, a local circuit local to said printer for controlling said printer, a repeating device for repeating message signals to said local circuit, apparatus for generating predetermined signals in said local circuit for advancing said medium through said printer which signals cause no symbols to be printed on said record medium,

5. In combination, a telegraph printer for printing symbols on a record medium, a controlling circuit local to said printer, a repeating device for repeating message signals to said controlling circuit, apparatus for generating nonmessage signals in said controlling circuit for advancing said medium through said printer which for initiating the operation of said"stpparatusv4 for supplying predeterminedv non-message" signals.

7. 'In combination, 'a'telegraph recording instrument for recording message' signalsfoiral re'- cording medium, apparatus foi supplying a plurality of non-message' `signalsr to 'saidrecording instrument for advancing'the recording medium therethroughy andmeans responsive'jointly` to predetermined signals and to' manually'operable switching means for'initiating the yoperation of said apparatus 'for supplying predetermined nonmessage signals.

8. In combination, a telegraph receiving recorder for recording telegraph signals'on'a recording medium, la selector'magnet for controlling said receiving recorder, a local circuitfincluding Y y a winding of said selector magnet for controlling said selectorV nagne'tfn apparatus for repeating telegraph signals Vto said local circuit, andother apparatus for rgenerating przedeterrninedv signals in said local circuit for advancingsaid'record medium through 'said recorder.

9. In combination, a telegraph receiving recorder for recording telegraph I-`sigrials0n a recording medium; a selector'm'ag'net'for controlling said receiving recorder, a circuit local to and including said selector magnet, apparatus for repeating telegraph signals tosaid 'circuit local Yto said selector magnet, other apparatus "for generating predetermined signals in said circuit local to said selector magnet for advancing said record medium through said recorder, timedel'ay apparatus for stopping said apparatus for generating predetermined signals after operation thereof Vfer `a specified interval of timef 10. In a telegraph system, a recording instrumentV for recording'symb'ols in accordance with telegraph signals on a record medium, equipment for supplying telegraph signals'to said recording instrument, apparatus for generating specied telegraph signals for advancing said record medium through said recording instrument, an automatic telegraph'trafnsmitter controlled by' said recorded signals, apparatus jointly'responsive 'to predetermined signals and to the supply of lrecord mediumV betweensa'id recording instrument' and 'sai`d"transmitter' for initiating the operationof said apparatus for generating specified telegraph signals.' -lll lIn combination, a telegraph printer Ifor printing syr'nbol's`on a record medium, a' control circuit'local to s'aid printerfa repeatingrdevice for repeating 'message' signals to said'control circuit, apparatus'for" generating predetermined signals,

Aand means operating independent of said repeating device for supplying said predetermined sign`als to said local circuit'for advancing said lmedium to saidprinter in response to" said predetermined signals which 'cause nol symbols to be pi'irite'd on said recording medium.

` 12'- In combinationfa telegraph receiving recorder for recording telegraph' signals'on a recording' mediumjaselector'magnet for control- 'lin'g'said receiving recorder, a Winding 'on' said selector magnet,'a` local circuit including a Winding on said selector magnet for'v controlling said slectormagnet and s aidreceiving recorder, ap paratus for' repeating` telegraph 'signals to said local circuit, other apparatus *for generating prev determined signals, equipment for supplying said predetermined signals te said local circuit for advancing thev recording medium through said recorder'in response toY said predetermined signals supplied to said local circuit.'

RrIA SMITH Administrarrir o f the' Estate' of Fuzrzertn' S. Kinkecd, Deceased.

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