Патент USA US2128788код для вставки
Aug. 30, 1938. - M. AMANN ET A1. 2,128,788 TELEGRAPH INSTALLATION Filed March 28, 1936 #sin *Q7-5,', ve’ l' " fi -é nl A; A, LL--i > S/ï | INI/Eyrolles MAX ÁMANM ` ,600W/z; GÜNTHER, ALF/¿ED LAHL. 2,128,788 Patented Aug. 30,1938 UNITED STATES smear ori-‘ies 2,128,788 TELEGRAPH INSTALLATION `Mair Amann, Ludwig Günther, and Alfred Lahl, Frankfort-on-the-Main, Germany, assignors to Nationale Telephon und Telegraphen Werke G. m. b. H., Frankfort-on-the-Main, Ger many, a corporation of Germany Application March 28, 1936, Serial No. 71,418 In Germany April 18, 1935 12 Claims. This invention relates to printing telegraph apparatus and, more speciñcally, to answer back devices with which such apparatus can be pro vided. These answer back devices are provided particularly in teleprinting installations oper ated through exchanges, to enable an identifica tion signal to be sent automatically from the called station to the calling station indicating, for example, the name of the called station. The name transmitter is generally brought automati cally into operation at the beginning of the com (Cl. 178-23) brings about transmission of the “Who-are-you’ i signal. ZMS-controlled by a cam of the transmitter shaft of the printer. slcr and ska-the transmitting contacts which Ul are actuated in phase with the signal sequence to be transmitted. ZME-controlled by a cam of. the receiver shaft munication and sends out its signal one or more of the printer. VVD-controlled by the receiver on reception 10 of the “who-are-you” signal. Kl--controlled by the receiver on reception of times. a special signal. ` In accordance with the invention, the answer back device is arranged not only so that it can be brought automatically into operation on con nection to the called station but also so that it can be brought into operation at will through the operation of key controlled contacts. The iden tiñcation signal can then also be sent out by the calling subscriber, for example, at the conclusion of the communication. , The answer back device of the calling station may be arranged so that it can be brought into operation by a single depression of a key and so that the signature of the sender can be trans mitted at the end of the transmitted text. This represents a substantial simpliñcation in opera tion of the apparatus and enables good use to be 30 made of the answer back device. An example of a telegraph printing apparatus v pap-_controlled by the paper ofthe printer. ` nslcr and mika-the “answer back” transmitting 15 contacts. ` nhr and aha-_controlled by the “answer back” device as long as it is driven by the motor. 11b-controlled by the “answer back” device at the instant at which it is declutched from the motor. The apparatus is driven by a motor M. This motor drives, in the transmitter, the transmitting distributor shaft (contacts skr and ska) and in the receiver, the not illustrated distributor for 25 translation of the incoming signal impulses and the not illustrated printer. Each station also has a time switch mecha nisrn driven by the motor M associated with it `which serves, among other things, for interrupt 30 ing the motor circuit should a given length of provided in accordance with the invention with ' time elapse during which no signals are sent or received. This time switch device is brought an answer back device is illustrated in the accom panying drawing. This shows the circuit dia 35 gram for an apparatus in a telegraph station SI constructed to operate both as a transmitter and as a receiver and for uninterrupted double cur rent operation. The connections at the station S2 at the other end of the line L are formed in 40 the same way. The various relay contacts are, in accordance with the usual convention, designated in the drawing by small letters corresponding to the capital letters used to designate the relays on 45 which they depend. In addition` to the relay contacts, there are also the following contacts: ET-controlled by a particular transmitting key. p .g5 ` l Unt! and UntZ--controlled by another trans into the operative position by energization of. a magnet ZS and the time is counted from the in stant at which the magnet ZS is de-energized. The station is also provided with an answer back device of suitable construction which is made operative by an energization of short dura tion of a magnet N. The answer back device 40 may comprise a drum having cams distributed over its circumference in a manner corresponding to the signal characterizing the station to which it belongs. These cams control the contacts nskr and nska. 'I‘he drum is clutched to the motor M by the magnet N upon a short energiza tion of this magnet for a number of revolutions during which time the contacts 11711' and nha, are thrown. The drum is declutched automatically at the end of these revolutions. A contact nt is mitting key. opened for a short time by the drum shortly .aa-closed by the “shift” key for sending a “shift” signal and which remains closed until the “shift back” signal is sent out. before the answer back device is declutched. wol-«controlled by the transmitting keywhich The contacts sïcr and nskr of the transmitter and the answer back device open in phase with the signal transmission. The contacts ska and 55 2 2,128,788 mslm on the other hand close a short time before the opening and also open a short time after the mains open, the contact slcc remains closed and connects the spacing current battery E to the closing of the contacts skr and nslcr. rl‘he receiver is controlled by a polarized line relay ER lying in the line L and influencing the line L’ through the contact 3 of the key PT and the contacts 28|, sp3 and ska and uhr. This causes reversal of the contact er of the line relay As the signal arrives for The operation over the line L takes place with transmission at a time when the motor M at the double current. In each station there is a mark transmitting end is just starting, the time dur ing battery e and a spacing battery E. '-'The‘ îfjing which the contact skï is maintained open, 10 positive pole of the marking battery oitheillus .or ,the time during which the battery E is con 10 receiving magnet EM. ' trated station is connected to earth which forms ER in both stations. nected, is much longer than it would be were the return line; in the unillustrated station at the the signals to arrive for transmission when the other end of the line the negative pole of the motor is running at its normal speed. The con marking battery is connected to earth in the same tact er is therefore reversed for this correspond way. Similarly, the spacing batteries of the two Y ingly longer tima-both in the calling and in the 15 stations are connected oppositely. called station. Y The earth connection for the spacing bat-V In the called station, only the following circuit teries E runs on the marking side of the‘contact will> be formed: pap, This contact is controlled by the paper +, contact cr, relay EH, contact 232, -feed mechanism (not illustrated) in such a way 20 that it is reversed on interruption of the paper . The relay AEH responds and closes a holding cir feed for example, in consequence of the failure of cuit over a. resistance by means of Vits contact supply. chl. The Contact chil is closed in order that the A test key PT having contacts l-ß is provided holding circuit may be independent of the contact 282 but dependent upon the contact th of a ther 25 for-determining whether the telegraph appara mo-relay ,TH which isV switched in by the contact tus and its answer back device are in good work ing order. This can be determined, for example, e713 to interruptthe holding circuit after a given bycausing the transmitted'text to be recorded time. eBy means of the contact e115, an acoustic only in the receiver of the transmitting station. signal is given by the bell KL or an optical signal The remaining connections of the telegraph by the lamp ULwhich indicates -that a communi cation is starting.. If a ' special code signal is apparatus serve for ensuring undisturbed opera .»tion. The apparatus operates in the following sent out. which reverses the contact kl in the manner: receiver of the called station, the indication Asig The marking circuit» runs as follows: earth, .nal can be switchedin at will. This signal is'also lbattery e >ofthe illustrated station, Contact I, answer back contact nskr, transmittingY Contact S761', contact 5, line relay ER, line L, and thence >switcheolin by means of the paper contact pap 35 and acts as an alarm signal lshould the paper feed fail. Y - , Y to the identically connected but not illustrated station» at the other end of the line and the The magnet ZS in. the calledstation is con nected to the source of current AS by means of marking battery e connected therein in series . the Contact eh2- so that the time switch mech 40 40 anism also comes` intooperation in. the. called and back to earth. This‘marking current energizes the polarized station and closes the contacts 281-283 and relay ER in. such a way that the-contact er . reverses -the contact Vcs2. . The motor M in the assumes the illustratedposition. _ calledV station; is .switched in by theA contact 2s3 f 45 ' When it is desired to- transmit a communica `and, the- receiving magnet EM isV connected to, tion from a calling tothe called station, the the ,negative terminalin a preparatory manner switching in key ET on the keyboard of the trans „by the .contact 232 so that it responds on release mitter of the calling> station is actuated so that , ottheline relay .-Elî'..v The contact cs2 energizes a circuit is closed for the magnet »ZS of the time _ a relay SP of the calledstationin the following switch mechanismas long as the key is depressed ' circuit: and a special code signal is set up and transmitted -, contact 282, contact e116, relay SP, + - through the agency of the transmitter combina The relayY SP, as a precautionary measure, closes tion elements. a. holding circuit by means ofv its contactsp‘ô. The energization of thermagnet ZS, in a man The contact spl short circuits th-e transmitting ner which needs no detailed‘description, causes the contacts 23|, 2.92 and 283 to be operated. The 'contact skr in the called station and, by opening the contact S103, prevents the switching in of the contact 253 closes the circuit for the driving mo `tor M and the transmitting apparatus is thus Aspacing current battery E in the called station made ready for operation. The contact 2s! pre ‘ through the Contact ska. Finally, the contact $101!Y in the called station paresv the connection of `the ‘spacing current 60 «battery E. The Contact 232 causes the negative prevents the magnet N which serves to bring its current to iiow through the contact 'l to the answer back device into operation from being energized by operation of the key contact Untl. magnet EM which, therefore, responds but with Thus, on energization- of the relay SP in the . out as yet. causing anything else to happen. During running of the motor M; the code signal « called station, no code signals can be transmit vfes. which has « been, set 1 up by Y depression of the ted »from the apparatus to that station by oper 65 switching-in key ET is transmitted through the ation of a key. `line L. This signal is preierably'a ñve-unit signal The answer back device of the called-station consisting. of a start impulsa'iive successive spac can only be made operative by means of the con current impulses and a stop, marking current " tact WD which is controlled by the receiving ap 70 vvo ing impulse. The contact slcr remains open during paratus. When, after a corresponding signal has the transmission both of the start impulse and » been transmitted from the'called station, the of the five spacing impulses and is only closed . contactWD in the called station is closed in a on transmission of the stop impulse. Through known but not illustrated manner, the magnet N>of the-answer back device is energized andr out the time during which the contactY slcr re 3 2,128,788 brings into operation its mechanism for sending back an identification signal one or more times. Fortransmission of the code signal bringing the answer back device of the called station into operation, a character shift key, in fact, the iig ures-signs key must first of all be depressed in the transmitter of the calling station. The de pression of this key causes the contact zz to be closed until actuation of the letter key. The de 10 pression of the transmitter key which causes the transmission of the who-are-you code signal bringing the answer back device of the called station into operation, causes a temporary closing of the contact wd. The following circuit is then 15 closed in the calling station: -, contacts ze, wd, sp2, relay WDV, -|A'holding circuit for the relay WDV is closed by the contact wdvZ over a resistance and the 20 contact nt. The answer back contacts nsïcr and nska of the calling‘station are prevented from being effective by the contacts wdcß and wdvd. This is necessary because the who-are-you code signal bringing the answer back device of the 25 called station into operation also influences the receiver of the calling station so» that the answer contact Untl through the Contact spd and, by means of the contact key Uni2, energizes the magnet ZS as a precautionary measure in order that the motor may be maintained in operation while the answer back device is running down. The called station cannot effect such a selec tive bringing into operation because its relay SP remains held up as long as the contact cs2 of the time switch is thrown and makes the key con tact Untl inoperative. 10 ` During ythe transmissionA and the reception of each signal, the transmitting or receiving dis tributor shaft is rotated in accordance with the known start-stop principle, During each rota tion, a contact ZMS or ZME is closed by a notch 15 in the shaft which energizes the magnet ZS of the time- switch mechanism and switches this mechanism back again into the starting position. After transmission of the communication, the time switch mechanism, unless again called upon 20.. for use, is reset into its normal position after a predetermined time and its contacts asl-_253 are thrown. The motor circuit is broken at the con tact 283 so as to preclude operation of the time switch through the contacts ZMS, ZME and Untl 25.' which might be accidentally actuated and indi back device of’ this station is also made operative rectly close the motor circuit again. by the contact WD of its receiver. Now, the answer back devices of both stations Uninterrupted double current operation is only used for two-way traffic. For testing the appa 30 are clutched vto their motors. No signals are transmitted in the calling station because the contacts nslcr and nslca are made inoperative by thecontacts wdvd and wdvß ofthe energized relay WDV. 'The contacts nha. and nm' remain actuated throughout the operation of the answer back device of the calling station so that the transmitting contacts skr and ska are made in operative. ' The transmission of a signal is thus yprevented if anî attempt is made to transmit one y40 by depression of a key of the keyboard while the 'answer back device ofthe calling station is in operation. ` > " ratus to see that it is in good working order, the 30 switch PT'is reversed and Single current oper ation initiated, the contact 3 being opened so as to disconnect the spacing current battery E. The marking battery e is also disconnected at the contact ll from the transmitting contacts nskr 35.: and slcr but remains connected to the line L as a source’ of `marking current through the make before-break contact li, 5 of the switch PT. During testing, the magnet EM is connectedA 40 directly in the following local circuit: +, contact er, magnet EM, contacts 2, nslcr, slcr, ‘ B, cs2, - In the called station, in which the relay WDV Y is not operative, the answer back device sends out The testing can extend both to the transmitting contact slcr and to the answer back contact nslcr. 45 the series of signals associated with the desig nation- of the station or the like, a corresponding The contact nslcr can be actuated for transmis recording being effected by means of the line re lays ER of the called and calling stations. The transmitted ktext is printed in both the calling and the called stations by means of the magnets 50 EM.v Disturbances due to the rythmic throwing of the contact er during reception of signals or when signals are simultaneously transmitted and recorded are prevented by the spark quenching 55 device Fu. f ` The answer vback devices of both stations op erate simultaneously. The identification signal sent` by the answer back device of the `called station is completely recorded by the time the 60 answer back device of the calling station comes to rest. 4Now 'the ,contacts-uhu. and nhr of the sion of the name automatically by closing of the keyl contact Untl. Now, the energization of the relay WDV effected on depression of the key wd is ineffective because the contact wdvß has been 50 made ineffective by the contact l. During the testing operation, the apparatus is not entirely disconnected from the line. At the contact 8 of' the testing switch PT, the relay EH is connected to the spacing side of the operative 55 contact cs2 so that it can respond to transmitted signals, for example, to a switching-in signal and can close a holding circuit and can actuate the call signal by‘means of the contact ehä. The re lay SP is also energized and remains energized 60 when the testing switch PT is re-set. calling station are thrown again and the contact 4 A special source of current having one pole ’ nt is opened for a short time so as to open the connected to earth can be used as the local source holding circuit for the relay WDV which thus becomes (le-energized. It is then possible for thetransmission of. the text to begin in the call ing station. After the transmission of the communication, , the calling station, the relay WDV of which has again dropped, 'can bring its answer back device into operation byA actuation of the key contacts Untl and Unt2 so that a series of code signals serving as a “signature” is transmitted. The v relay N of the answer back device of the calling 715 station is caused to respond by means of the key of current for‘operation 'of the auxiliary switch means. However, if desired, the source of mark 65 ing current e’ or a part of the source of spacing currentE can be used for this purpose. The provision' of resistances in the holding cir cuits of the relays EH, WDV and SP serve the purpose of reducing current consumption as far 70 as possible. The regulating resistance connected to the magnet EM serves for adjusting the ener gizing current to be supplied to this magnet. The regulating resistance lconnected to the bat tery E serves for regulating the current to be 4 2,128,788 supplied to the line. This current has to vary in accordance with the conditions in the line and, with telegraph operation over 'open lines, must be capable of being iinely adjusted over a wide range. » According to the particular operating condi 10 We claim: ' Y ` _ tioned switch ‘ ~ ` i 1. A telegraph system comprising a line and a station at each end of said line, each station corn prising a printing telegraph apparatus, an answer back device., switch means for making said answer 15 back device operative and means adapted, on ac-> tuation by a signal received through said line and also on actuation of a key of the telegraph appa ratus at the station at which said means are lo cated, to bring said switch means into operation. 2.' A telegraph system according to claim 1, in which each station also comprises switch means for preventing an arbitrary bringing into opera tion of the answer back device under the influence of la key of the telegraph apparatus of the same station. , . 3. A telegraph system comprising a line, a call ing station at one end of the line and a called station at the other end of the line and a printing telegraph apparatus at each of said stations, each of said printing telegraph apparatus being pro vided with an answer back device, with switch means'for bringing said answer back device into operation, with means responsive to a signal re-V ceived through said line for operating said switch means. ' " ' " 6. A double current telegraph system compris ' tions, various of the described safety devices can be omitted or can be replaced by other known means.Vv circuit, said switch being adapted on its actuation to Vprevent .the answer back device being made inoperative under the influence of said last men ing a line, a calling station at one end of said line and a called station at the'other end of said line, each station comprising a printing telegraph apparatus provided with transmitting keys and adapted'totransmit code ‘signals to said line and to evaluate code signals received through said line for the selection and printing of a type, a source of marking current, a'source-of spacing current,ja line relay, an " answer back device, switch means responsiveV to a signal re ceived by said linefor bringing said answer back device into operation, switch means responsive to the operation of a special keyV of the Iprinting telegraph apparatus at the station at which said lastv mentioned switch means are located for 20 bringing saida'nswer back device into'operation; and a switchVV for 'connecting said printing tele graph apparatus >and said answer back Vdevice- in a local circuit, said switch being 'adapted on its actuation to >maintain ythe connection ofA said source of marking current and'of said‘line relay to said line. ' ` ‘ ' ‘ " 7. A telegraph system according to claim 6, in which each station also comprises auxiliary switch means'adapted Yto 'becontrolled'by said 36 line relay and adapted 'on' its actuation to switch ina call signal. ' " Í ' ì î 8.'A telegraph system according to' claim 6, in'which each station comprises' auxiliary lswitch 36 means, with means actuated by a key of the tele means adaptedto be controlled'by said lineY relay 35 graph apparatus at the station at which-said last and adapted to influence said switch meansfor mentioned means are located for operating said' .making said answer'bac’k device operative, said switch means, with means for transmitting a spe switch means being operative also during> the .cial code signal for bringing into operation the actuation' of> said switch> for switching~in saidY answer back device of the'other station and with switch means responsive to the transmission of said code signal for cutting out said answer back` device of the calling station on 'transmission of said special code signal from the calling station, 45 to the called station. ' ' Y I ' printing telegraph apparatus and saidV answeru 40 back device in- 'aflocalvcircuit ' ' " " 9. YA telegraph system, comprising af'line', `a calling. station at -one end " of `-said line' 'and a called Vstation avtithei rother‘end’of said line, Veach station havinga‘printing telegraph apparatus provi-ded with transmitting keysa'nd adapted’to 45 which each of said stations comprises a switch for transmit code signals through said line‘on actu`a-` connecting the printing telegraph apparatus and tion of said keys and Ato translate codef'signals the answer back device at that station in Va localV received through said line‘for'the selection and circuit. 4. A telegraph system according to Vclaim 1, in 5. A telegraph system comprising a line and a calling station and a called station at the ends of said line, each station comprising a printing telegraph apparatus adapted to transmit code 55 signals through said line and to translate code signals received through said line for selection and printing of a type, an answer back device, switch means responsive to a code signal received through said line and translated by said vprint 60 ing'telegraph apparatus for bringing saidan swer back device into operation, switch means operable by aY key of the printing telegraph ap paratus at the station at which said last men tioned switch means are ‘located forV bringing 65 said answer back device into operation, switch means for rendering the answer back Ydevice of y‘the calling station inoperative on actuation of a key of the printing telegraph apparatus of said calling station for transmitting through said 70 line a special code signal which causes the an-Y swer back device of the called station to be made printing of a type, each statiönbeing' also pro~> 50 vided withl anY answer back'device, vwith/switch means responsive vto a signal receivedthrough said line for bringing into operation said answer back device, with switch meansV responsive to theV actuation of a keyof the printing telegraph ap 55 paratus’at the station at which `-said last men tioned switch means are located for bringing said answer back device Vinto operation, with an- aux; iliary relay a-dapted‘o'n its energiza'tiontoïclose a holding circuit ' for itself andI with switch' 60 means, controlled by said' auxiliary”relay"on reception of code signals sent through said line', . for preventing an arbitrary bringing'into'ope'ra tion of said answer backd'evice' on actuationïof' akey. ~ ` " 10. A telegraph system comprising Va line and a station at each end of said line, each of said-sta# tions having a printing telegraph apparatus'pro vided with'keys and adapted to' transmit code signals through saidlineon actuation of "said 70 keys and to translate code Vsignals received through said line for selection and printing of a type, each of said stations being also provided operative, said switch means being responsive to the transmission of said special code signal, and a switch for connecting said printing telegraph with an answer back device, with switch meansV apparatus and said answer back device in a local responsive to a'signal- receivedthrough said line 5 2,128,788 for releasing said answer back device, with switch means responsive to the actuation of a special key of the printing telegraph apparatus at the station at which said last mentioned switch means are located for releasing said answer back device, and with switch means for preventing the actuation of the transmitter of said printing telegraph apparatus and of said answer back device, means also being provided for controlling said switch means in dependence upon the feed 10 of the paper strip in said printing telegraph apparatus. 11. A telegraph system according to claim 10, comprising also auxiliary relays, call signals con trolled by said auxiliary relays and in which said 15 switch means for preventing the actuation of the transmitter of said printing telegraph ap paratus and ofv said answer back device are adapted to control said signals. 12. A telegraph system comprising a line and 20 a station at each end of said line, each station having a printing telegraph apparatus provided with transmitting keys and adapted to trans mit code signals through said line on actuation of said keys and to translate code signals received 25 through said line for selection and printing of a type, each station being also provided with a line relay controlling said printing telegraph ap paratus, with an answer back device, with a motor driving said printing telegraph apparatus and said answer back device, with means for clutching said answer back device to said mo tor, with automatically operating means for de clutching said answer back device, with switching means responsive to a special code signal received by said line relay for operating said clutching means, with switching means responsive to an 10 actuation of a special key of the printing tele-> graph apparatus at the station at which said last mentioned switch means are located for operat ing said clutching means, with transmitting con tacts controlled by said answer back device, with 15 switching means responsive to an actuation of said special key for making said transmitting contacts controlled by said answer back device inoperative, and with means, controlled by said answer back device when said answer back device is clutched to said motor, for preventing a trans mission of code signals by said printing telegraph apparatus on actuation of its keys. MAX AMANN. LUDWIG GÜNTHER. ALFRED LAHL.