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July 99 1946. F. s. KINKEAD ' 2,403,441 TELEGRAPH SYSTEM Filed Aug. 26, 1942 Pou/17250 `\._ ‘ ¿1NLPm/sMu.: // ' PULAR/ZED /N VEN TOR R/ 7.21 S K/NKEAD HAS` ADM/N/S TRA TR/X gyn/MEW. A 7' TOR/VEV 2,403,441 Patented July 9, 1946 UNITED STATES PATENT OFFICE 2,403,441 TELEGRAPH SYSTEM Fullerton S. Kînkead, deceased, late of New York, N. Y., by Rita Smith Kinkead, administratrix, New York, N. Y., assignor to Bell Telephone Laboratories, Incorporated, New York, N. Y., a corporation of New York Application August 2,6, 1942, Serial No. 456,149 12 Claims. (C1. 178-42) 1 2 different speeds or due to the fact that various types of supervisory signals or circuits are re quired for each of the systems which may or may not be the same, Such systems frequently are 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” sig nals which terms, for the purposes of this speci fication and the claims appended hereto are used to describe and designate any signals or permu tation 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 re corded at the station of ultimate destination thereof. Due to the characteristics of the differ ent code combinations generally employed to unable to transmit to other systems through the usual type of telegraph repeater, for example, due paratus and due to the functions and symbols 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 instru ments due to the fact that the lines operate at to the fact that one system may not be prepared to'receive messages when the messages are trans mitted from the other system. Under these and actuate the reperforator and other telegraph ap represented by the respective code combinations, certain of these code combinations are considered more desirable than others to be generated locally other circumstances it has been the practice to 20 for advancing the recording medium through the recording instrument. In accordance with the receive the signals on a reperforating instrument specific embodiment of the invention described and thus store the signals for transmission over herein, circuits are arranged to generate the so any other desired line or system at a later time. called letters signals which comprise a spacing In some instances a storage controlled transmit start pulse followed by ñve significant selective ter which usually takes the form of a tape control pulses and a stop pulse, all of which are marking. transmitter is associated with the reperforator Preferably in accordance with the present in unit and the tape passes from reperforator unit vention, circuits are so arranged that it is neces directly to the transmitter unit. In other cases it is desirable to remove the tape from the re perforator and carry it to some transmitter for transmission over a desired line. sary to precede each message by one or more let ters signals for properly conditioning the reper forator and insuring that it will properly receive the message to be transmitted to it. These sig In order to insure that the entire message will nals are followed `by the message proper after be transmitted when required or that the entire which an end-of-message signal is transmitted message can readily be removed from the reper forator it is necessary to make some provision for 35 over the line to the reperforator. The end-of-message signal conditions the local advancing the tape out of the reperforator, In circuits so that if an associated tape controlled the past this has been accomplished either man transmitter transmits all the available tape a ually or by providing a special reperforator unit group of letters signals will be generated locally to enable the recording medium to be advanced through the mechanism when no signals are being 40 and supplied to the reperforator for an interval of time sufficiently long to insure that the entire received. In accordance with the present inven tion an improved arrangement is provided in which it is unnecessary to provide a special re perforator unit or to incorporate additional ele message will be transmitted by the associated transmitter. If no tape controlled transmitter is associated ments in the reperforator to cause it to feed out 45 with the reperforator, then the end-of-message signal will condition the circuits so that the oper additional tape, ator may cause the reperforator to advance the In accordance with the present invention cir recording means through it by operating a special cuits and relay equipment are provided adjacent key, In this case also circuits operate sufficiently to and at the same location as the reperforator for generating the signals locally and for oper 60 long to insure that the entire message will ad vance out of the reperforator. ' ating the reperforator in accordance with these When desired, manual control may also be pro signals to automatically advance the tape out of vided when an automatic transmitter is associated the machine. with the reperforator. Any suitable signal may be generated locally The local generation of the signals for advanc and transmitted to the reperforator but the 55 2,403,441 3 4 -ing the recording medium through the reperto tion of relay 20 at the end of the first spacing pulse from battery through the winding of relay 32, the left-hand operated contacts of relay 32 and the winding of relay 29 to ground through the nor rating 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 mally closed contacts i5 and I6 controlled by the reperforator unit II. Relay 29 in operating completes an obvious cir cuit for the operation of the slow-release relay or reperforator unit. 2S. Relay ‘28 in operating interrupts the operat The foregoing object and features, as woll as other objects and features, of the present inven-‘I 150 ing circuit of relay 32 and completes a circuit for maintaining itself operated from battery through tion may be more readily understood from the> its winding and left-hand operated contacts to following description when read with reference' to the attached drawing whichshows inv detail one » groundëth'roughthe left-hand contact and arma ture of relay‘ZIl. Relay 28 is slow in releasing so speciñc embodiment of the invention. >It is to‘be .` that it will r'e'main’operated due to current flowing understood, however, that the invention as de nned in the claims appended` hereto is not tc- be - in the circuit through the left-hand Contact and rarmature of’ relayv 20 during the time relay 20 is limited in any way to the specific embodiment following the signals received over line I0 and described herein. f repeated by relay I4 to relay 2U. In the specific embodiment of this invention The operation of either relays 23 or 29 com shown in the drawing the relays are normally pletes a circuit for the operation of relay 2| from maintained in the position` shown in the drawing. battery through the winding of relay 2| to ground, Current ii'ovving throughv the: upper windings of through the operated contacts of either relays 23 relays E=2fand23 and the lower'w-inding cf relay 2i) or 29. maintainsthe armatures of these relays in their The operation of relay 2l transfers the circuit markingpositions; that' is in the positions shown of the selector »magnet I9 of the reperforator Il inthe drawing. The selector magnetl I?lof` the reperforator SI from the contacts of relay 23 to the contacts of is maintained operated'in acircuitextending from line relay I4. Consequently, thereafter the ground~A throughz its winding'` and the left~hand selector magnet I9'will follow the’signals trans succeeding messages transmitted to the storage inner break contacts of . relay ZI to battery, thrcugh‘the 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~'inrthe«drawing, is connected to mitted over line I0. One or more letters signals transmitted preceding the message is required in order to allow sul'licient time for the various re lays described above to operate, as well as tov allow sufiicient time for stopping the automatic local , generation of signals as will-be described herein after. < source of power ßßï‘through the closed switch ¿lli Thereafter the circuits Will remain in the posi and is continuously'operating. In a similar manw tion describedA during the remainder of the re ner a- motor for operating the reper-forator II, ception of 'the message. not shown in-tliedrawing, is connected‘to a source 40 During the operation of the reperforator II, of~power’andlcontinually operating as is well un contacts I8 close once during the reception of derstood by those skilled in the art. As» pointed; out above, the first signals trans~ mitted over line lûvtothefrecording instrument each and every code combination received by the reperforator II. The circuit of these contacts, however. is open at the right-hand operated con II will generally comprise one or more “letters 45 tacts of relay 29'at this time so that the closure code” combinations. Relay; I4' willvrespond to `of these contacts during the reception of a mes these code combinations andfcause its armature sage performs no useful function. Contacts I1 to moveto itsspacing contact> in“ response tothe are closed by the selector of the receiving device reception of thespacing start‘pulse‘of this code Il in response to the reception of a letters code combination. As iS Well understoody by those 50 combination. In other words, contacts I1 open skilled inthe art, every start-stopY code combinau once in response to the receptionof each letters tion is preceded by a spacingstart pulse. Conse signal received by the reperforator I I. Similarly, quently, the armature of relay Ilifwil move to its contacts I 5 are momentarily operated once by left-hand positiony at the beginning of any code the reception of each code combination usually combination received over line I0, it being under 55 employed to represent the letter I-I. Each of the stood that while this,v invention is not so limited contacts I5, l1 and I8 are operated momentarily the specific embodiment of- this4 invention de in response to the reecption of the respective code scribed hereinis adapted vfor use in telegraph sys combinations by the selecting mechanism of re» tems employing these-called start-stop method perforator II. Contacts I6, however, are op of synchronizing; erated in response to the reception of a figures When the-armature of relay- I4 moves to its-left» 60 code combination and remain operated until a hand position an obviousl circuit is completed letters code combination is received which causes through'the upper winding of relay 2t, the cur the contacts to be restored or closed as shown rent through which overcomes the effect of the on the drawing. In addition to the closure of current flowing through the'lower winding of this contacts IB'in response to a letters signal, the relay and causes-its armature Vto vmove 4to its spac 65 selecting equipment is frequently arranged to ing or left-hand position. The operation of relay cause contacts I6 to close in response to the re 20 to its left-hand position completes av circuit for ception of a space code combination. While these the operation of relay 32f from battery through contacts, as described above, are arranged to be the winding of relay 32, the- left-hand break con» tacts ofïrelay- 2B .to ground `through the'left-hand 70 actuated in response to the speciiically enu merated code combinations, it wil] be readily ap contact and armature offrelay'20'. The operation parent to those skilled in the art that any other of relay 32-f prepares a circuit for the operation suitable codé combinations may be employed to>` of relay 29A and'forv maintaining itself operated control these contacts. which circuit becomes effective upon' the opera 75 For a more detailed description of typical 2,403,441 5 6 supply of tape between the reperforator II and selector arrangements for’selectively closing con tacts in response to received telegraph signals transmitter I2 is"_reduced to some predetermined minimum quantity at Which time contacts 48 are y reference is made ' to United States Patents 2,120,235, ’granted Beattie etal. on June 14, 1938; 2,112,234, granted to Beattieget al. on March 29, 1938; and 2,154,547, granted to Walker on April 18, 1939, all of which patents are hereby made a >In order for the transmitter I2 to transmit, an operator or attendant closes switch '39 which part of this application as if fully included herein. power 38 through the winding of start magnet l4If> opened. . v . l completes an obvious circuit from a source of which magnet releases the transmitter shaft 434 So long' as these contacts' are individually op- _ erated, as described above, the switching circuits 10 and permits the brush arm 46 to be rotated through one revolution by’motor 42 through fric controlled by them are not actuated. However, tion clutch 44 in the well-known manner. Con when a figures code combination is followed by an ` tacts -45 are controlled by the perforations of tape H, code combination, the locking circuit of relay I3, as is well understood by those skilledin the 32 and the operating circuit of relay 29 is inter rupted, thus permitting these relays torelease. Contacts I6 are opened in response to the recep tion of the ñgures signal and remain open until 15 art. - . ' ' ' ' When ycontacts 48 open, as described above, the circuit through thewinding of relay 3l will be closed by a letters or _spacing signal. Contacts interrupted. Consequently, relay 31 willv release. I5 are momentarily opene'din response to the H If no further signals have been received over line 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 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 right If additional signals are re 25 hand outer'break contacts of relay 2|. Relay 38 lin operating completes a circuit for,> ceived over line I0 following the ñgures and H maintaining itself operated from battery throughy code combinations, relay 28 will be maintained its winding and left-hand operated contacts to operated due to current ñowing through its Wind ground through the left-handA break contacts'of ing and its left-hand operated contacts to ground through the spacing contact and armature of re 30 relay 3| and the right-hand outer break con tacts of relay 2 I. lay 20. As described above, relay 20 follows the Relay 30 in operating removes negative bat signals transmitted over line I0 and maintains tery from the right~hand terminal of condenser the circuit through its left-hand contacts closed 35 and grid of tube 34 and connects negative for a sufficiently great proportion of time during the reception 0f signals to maintain relay 28 op 35 battery to the filament of tube 34. The filament ' of vtube 34 is thereby energized but tube 34 will not pass suñicient anode current to cause relay The first signal following the figures and H 33 to operate at this time due to the high nega signal which is not a letter signal will again com tive potential of the right-hand terminal of con plete a circuit for the operation of relay 32 from battery through the winding of relay 32, the 40 denser 35. The constants of condenser 35, re circuit of relay 28. erated. ` I sistance 36, as well as the constants of tube 34 are right-hand break contacts of relay 29, the such that it requires an appreciable period of momentarily operated contacts |8, contacts I1 to time, say of the order of l5 seconds, for the high ground through contacts I5 and I6 in parallel. potential of the right-hand terminal of condenser Relay 32 in operating again prepares the above described circuit for the operation of relay 29 4.5 35 to discharge through the high resistance 36 sufliciently to permit sufficient anode current to and for maintaining itself operated which circuit becomes fully effective when contacts I8 open. Thereafter, the circuit remains in the above de scribed condition throughout the remainder of the reception of message signals by the reperfora tor I I. If, however, no signals are received immediately ñow 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 50 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, following the figures signal and the subsequent 1943, which application is hereby made a part H signal, the release of vrelay 29, as described above, in response tothe reception of these two 55 of this present application as if fully included herein. code vcombinations interrupts the operating cir The operation of relay 30 connects ground to cuit of relay 28. _Under’these circumstances, the the armature ofrelay 22 which, in turn, reverses armature of relay 20 will be maintained in its the current flowing through the upper winding right-hand position as shown in the drawing where it interrupts the locking circuit of relay 28. 00 ofrelay 22 so that the current now flows from battery 49 through resistance 50, the upper wind Consequently, a short interval of time after the ing of relay 22, and the left-hand contact and release of relay 29, relay 28 will release. The re armature of relay 22 to ground through the right lease of relay 28 at this time interrupts the op» erating circuit of relay 2|, thus permitting relay 65 hand inner break contacts of relay 2| and the .right-hand inner operated contacts of relay 30. 2| to release. Relay 2| in releasing transfers the This reversed current flowing through the upper operating circuit of the selector magnet I9 from winding of relay 22 tends to operate the arma the contacts ofrelay I4 to the Contacts of re ture of this relay to itsright-hand position but 1 lay 23. is prevented from doing so by a current having Thereafter, the circuits remain in the condition described unless additional signals are received 70 a much greater effect flowing through the lower winding of this relay. Prior to the operation of over line >III in which case the circuits operate as relay 30, battery was connected to the left-hand described above. If the tape controlled trans terminal of condenser' 24 through the lower mitter I2 isv supplied with tape I3 from reperfo winding of relay 22. Upon the operation of relay rator II, transmitter I2 will generally continue to transmit the signals stored in tape I3 until the 75 30, however,> ground is connected to the left-hand 7, long for the selector magnet _I9'I to"~ interpret this termina of condenser 24 through lower ,winding` of relay 22; Hence, condenser24 will discharge interruption as a start signal. Thereafter, relay’ through the' lower winding'of relay 22 in such a direction _as to maintain the armature of relay 22 23 completes a circuit for the selector magnet I9' and maintains this circuit clo's'edsuñiciently long inthe position shown in the drawing. The con-_ stants‘of condenser 24‘, Ythe resistance of the lower winding of relay 22 and the constants of this so that thev selector’ magnet I9A interprets the following circuit closure asl 'a letters signal. Thereafter, the above described operation is re-V relay are such that itrequires an appreciable` peated and a series of letters signals generated' interval ofjtime before the discharged current and suppliedt'o the selector magnet I9. _The from> condenser 24 falls >to its su?liciently low 10 selector magnet I9 in responding to these >signals causes the tape' I3 to be advancedythro’ugh the value ‘to’ permit the Vreverse current flowing through the upper winding of this relay to move recording device I'I~ so'that the end ofthe nies-d its armature to its right-hand position. sage which was still within the reperforator il When the armature> of relay' 22 moves to its will be advanced out of this mechanism and right-hand position, itrdisconnects ground from through the transmitter I2. If for any reason the signals generated byrelays 22 and 23 are interpreted by `the> reperforating mechanism ,I i' the' left-'hand contacts' of this relay' and thus ì restores“ the current flowing through the` upper windingÍo'f' this relay to its ‘normal direction, as any signal other than a letters signal, a‘ci‘rcu'it Wheref'this'current will tend to operate the relay .will be completed for ythe operation' of' relay' 32 from battery through the winding of relay-_32, ther tothe position shown’in the drawing. However, at thisï‘tim'e; condenser 24 will start to charge to' battery îpotei'iti'al through thelower winding of relayr22. ‘The charging current of condenser 2d@ will produceoan‘eifect upon the armature of this relay which overcomes the effect of the' current’ flowing through the upper winding of this relay for an appreciable‘interval 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 20 right-‘hand break contacts'of relay 29`to ground through the‘universal contacts lIßand the letters' contacts I1 -to ground through contacts I5 and I6. This circuit is not k‘completed 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'` Ilíreclose. However, whenv any signal other than- letters signals is received by the selec'-i connects ground tothe left-hand winding Yof tor magnet I9 at this time,V the above described' 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 wind ing of relay 23. Upon the connection of ground to the left-har1d winding terminalA of the lower' winding of relay 23, condenser 21 will start to discharge through the lower winding of relay 23 circuit through the letterscontactsjand universal contacts is completed forY the operationjof' relay 354 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 29’and for maintaining relay 32 operated as described above. RelayI 29' in'operating completes circuits> for the operation and overcome the eliect of the current flowing through‘the upper winding of this relay and op of relays 28 and 2|, The Operation Of'relayA 2| crate the armature of this relay to its left-hand interrupts the localgeneration of letters signals> position where it interrupts a circuit to the selec and restores the circuits _to their normal or idleV tor magnet ISÍ At a later interval of time, either 45 conditioninl the same manner as describedv heref condenser will become suiiiciently discharged or relay 2,2`will operate in the position‘shown 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 Wind ing 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 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 tapé I3 to be adé vanccd out oi the reperforator I I continues under normal conditions during theY discharge time >of condenser 35, as described above; At the' v»end> Vof the time interval measured by the ¿discharge cir cuit of condenser 35_'and'_ tube 34, relay 33'will' current flowing through the upper winding oi' 55 this relay when condenser 21 became sufliciently operate and complete a circuit for the operation disclfiarged.- This relay is then maintained in of relay 3| ‘from’ batteryU to the> windingand this position by current flowing through itsupper right-hand break contacts vof'rela'yk 3l to‘__gr'ound winding, as described above, through the loperated contacts of relay 33. The constants of relay 22, as well as the values 60 lIt frequently _'is desirable to extend the circuit of'resistances 50 and 5I are so chosen that relay from theA contacts of relay 33' through’an addi 22`r'emains in the position shown in the' drawing tional interrupter to ground' or ythrough some- for 'aV greater Aproportion of the time and is op-A other switching circuits which contacts and cir cuits are indicated bythe dotted lineextending erated to its right-hand position for only a'sm'all proportion of the time. Consequently, relay> 23" 65 betweenjthe armatureV of relay 33ïandigrou`nd." interrupts a circuit of the selector magnet I9 for When ground'is applied to lthis circuit, relay 3| operates and completes a circuit'formaintaining' only short intervals of time followed'by appre ciable longer intervals of time duringrwhichV al itself operated from battery'through itswinding circuit oi the` selector` magnet is vclosed._ The and right-hand operated" contacts tok ground constants of condensers 24v and 21 andthe re 70 through ^ the" right-'hanèlibreak contacts ofi relay 2 I: The operationof relay 3`I also‘interrupts'both sistances of the windings of relays 22 and 23 and the _adjustment of kthese relays, as well‘as the opera-tingfand‘locking :circuits of relay 30'“, thus permitting*relayf30v‘to release. `Thé` release'A of the values of resistances 5,0 and 5I, are so se y relay'3ll disconnects ground " from _the armature" lectedthat relay~ 23 interrupts `thiefcircui~t_ofthel selector magnet >for" a‘ time ' interval” sufficiently' 75 V'2,403,441 ' e is restored to the‘position shown in theV drawing -» \ 10 ing the record medium through the receiving and the armature of relay 23 operated to its right instrument.- ‘ - t Underother circumstances, it may be desirable to cause the printing'mechanism to print some hand position. The release of relay 30 also re stores the circuit of condenser 35 andftube 34 to their normal or idle condition. Thus, the. gener predetermined speciñc character or symbol which forms no part of any message when transmitted ation of letters signals is interrupted and there after the circuits remain inthe condition de-y after messages `such as a period, dash, or any other suitable letter or symbol, as will be readily scribed above until. additional signals are received apparent to those skilled in the art.l I0. ' . v . If signals are received over'line I0 during the 10 Furthermore, the invention is not limited to the employment of any particular time measur time the letters signals are being generated, a ing device as; disclosed in the specific embodiment circuit for-the »operation of relay 32 is completed, ‘ of said invention and described herein. In addi as described above, and relay 32 in operating pre tion,v it may _be desirable to arrange the timing pares a »circuit for the operation of Arelay 29 which circuits of relay 22> so that they may be readily relay roperates as described above and completes adapted for use` in' cooperation withv receiving a circuit for the operation of relay 2|. Relay 2I reperforators operating at different speeds. For in operating interrupts the operating and locking thispurpose, the condenser 25 and switch 26 has circuit of relay 30 and permits this relay to release been included. l When the switch 26 is closed, and interrupt the generation of letters signals and , restore thecircuits and relays involved in the gen 20 condensers 24 and» 25 are connected in parallel, thus further delaying the operation of relay 22 eration of the letters signals to theirnormal or and _adapting a circuit arrangement including idle condition. Inasmuch as the .selector lmecha vthis relay and relay 23 Vto generate signals at a nism of the reperforator I I may not be in its 4idle lowerspeed than when switch 26 is open, as shown or normal condition when these signals Aare re ceived, it is desirable to precede the message by 25 in the drawing. , over line What is claimed is: one or more letters signals'to insure that-the sage being received. , ' ' Y ` f ,1. In a telegraph system, av channel of tele selector mechanism will be synchronized with the incoming signals and be in condition to properly respond to the ñrst code combination of themes graphic transmissionfa recording instrument for recording permutation code signals received over said channel upon a recording medium, and ap paratus for generating a plurality of predeter mined code combinations for advancing said me - 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 dium through said recording instrument and means jointly responsive to received signals and may wish to manually cause the reperforator II 35 to the demand for said record medium from said recording‘instrument for conditioning for oper to advance vthe tape„l3 through the mechanism ation- said apparatus for ‘generating a plurality of so that the entire message may be removed from predetermined code combinations. the machine. For this purpose, a 'key- 5l is pro 2.V In combination, a permutation code-receiv vided which the operator may operate after a ñgures H signal at the end of a message has been 40 -ing instrument for `perforating tape in accord ance with received Vpermutation codes having a received and, if n_o further signals are-_ received selector magnet. for controlling said receiving in at this time, the operation of key 51 `_serves the strument, a local circuit for the operation of said same purpose as the release of relay 31, as de 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. 50 3. In combination, a telegraph signal storing scribed above, and causes the mechanism to auto- ‘ matically advance the record medium I3 through the mechanism. At the end of the time interval measured Áby 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 device for storing signals in a medium, a circuit to discard the additional letters signals perforated local to said signal storing device for controlling the operation of said signal storing device, appa in tape I3, as is understood by those skilled in ratus for repeating signals to said local circuit, the art. Details of suitable types of reperforating mech 55 means for generating predetermined signals in said local circuit, and means responsive to signals anisms are disclosed in United States Patents in said local circuit other than said predeter 1,884,743, granted to Kleinschmidt on October 25, mined signals for interrupting the operation of 1932; and 2,042,788, granted to Krum on June 2, said means for generating predetermined signals. 1936. It is also apparent to those skilled Yin the art 60 4. In combination, a telegraph printer for that the mechanism II may comprise a printing reperforator such as is described in United States printing symbolson a record medium, a local 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 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 control ling circuit local to said printer, a repeating de vice for repeating message signals to said con circuit local to said printer for controlling said printer, a repeating device for repeating message Patents 2,273,909 and 2,273,910, granted to Swan on February 24, 1942; and 2,255,794, granted to signals to said local circuit, apparatus for gen Lake on September 16, 1941. All of the above 65 erating predetermined signals in said local cir identified patents are hereby made a part of this cuit for advancing said medium through said generated for automatically advancing the record medium through the mechanisms so that no symbol or character is printed upon the record trolling circuit, apparatus for generating non medium by the mechanism in response to the message signals in said controlling circuit for ad signals generated by the local circuits for advanc vancing said medium through said printer which 11 12 signals cause non-message symbols to be printed on said medium, " ' " " 10. In a telegraph system, a recording instru mentV for recording'symb'ols in accordance with ‘ telegraph signals on a record medium, equipment 6. In combination, a telegraph recording in strument for recording message signals on‘a re for _supplying telegraph signals'to said recording cording medium, apparatus ‘for’ supplying a'plu rality of non-message signals to saidrecording instrument for advancing the recording medium therethrough, and means responsive -'jointly to predetermined signals and to the'demand'ior`said record medium from -said"recordinginstrument for initiating the operation of said"s‘tpparatu‘s’v4 for instrument, apparatus for generating speciñed telegraph signals for advancing said record me dium through said recording instrument, an auto matic telegraph'trafnsmitter controlled by' said recorded signals, apparatus jointly'responsive 'to predetermined signals and to the supply of lrecord mediumV >betweenïsa'id recording instrument' and supplying predeterminedv non-message" signals. 'sai`d"transmitter' for initiating the operationof said apparatus for generating specified telegraph 7. 'In combination, 'a'telegraph recording in strument for recording message' signal‘sfoiral re' cording medium, apparatus ‘foi supplying a plu signals.'>` rality 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 non "‘ ` ' " ' ‘ ~‘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'f‘or" generating predetermined signals, 20 message signals.’ 8. In combination, a telegraph receiving re Aand means operating independent of said repeat ing device for supplying said predetermined sig n`als to said local '_circuit'ïfor advancing said lme dium to said‘printer in response to" said prede corder for recording telegraph ’signals'on'a re termined signals which 'cause nol symbols to be cording medium, la selector'magnet for controlling 25 pi'irite'd on said recording medium. ' ' said receiving recorder, a local circuitfincluding Y y ` _12'~ In combinationf’a telegraph receiving re a winding of said selector magnet for controlling said selectorV ?nagne'tfn apparatus for repeating corder for recording telegraph' signals'on a re cording' mediumja’selector'magnet for control telegraph signals Vto said local circuit, and~ other in said local circuit“ for advancing‘said'record 'lin'g'said receiving recorder, a Winding 'on' said selector magnet,'a` local circuit including a Wind ing on said selector magnet for'v controlling said medium through 'said recorder. sëlector’magnet and s_aidreceiving recorder, ap_ apparatus for rgenerating przedeterrninedv signals " ’ paratus for' repeating` telegraph 'signals to said 9. In combination, a telegraph receiving re corder for recording telegraph I~`sigrials0n a re local- circuit, other apparatus *for generating pre- v cording medium; a selector'm'ag'net'for control’ determined signals, equipment -for supplying said predetermined signals te said local circuit for ad ling said receiving recorder, a circuit local to and including said selector magnet, apparatus for- re peating telegraph signals tosaid 'circuit local Yto said selector magnet, other apparatus "for gen erating predetermined signals in said circuit local to said selector magnet for advancing said record ‘van’cing thev recording medium- through said re corder'in response toY said predetermined signals supplied to said local circuit.' ’ " " ’ ‘ " ' " ' Administrarr‘ir o_f the' RrI‘A Estate' SMITH of Fuzrzertón' S. medium through said recorder, timedel'aíy appa ratus -for stopping said apparatus for generating predetermined signals after operation thereof Vfer `a specified interval of timef ' 49 ' 45 Kinkecd, Deceased. 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