Патент USA US2110312код для вставки
March 8, 1938. 2 1d, 1 0 3 11 2 A. SZILARD ET AL TELEPHONE SYSTEM Filed May 17, 1935 5 Sheets-Sheet 1 E xifrgmi . M2. V1. Vs Se ‘Mk 1 im. Y‘ 9 R4 ' ' W/tnesses : W fnveniars: March 8, 1938. ' ' A, szlLARD ET AL ‘2,110,312 TELEPHONE SYSTEM I Filed May 17, 1935 H ‘F Va 1 1 i i 3, . . | Wi‘tnasses: 2 1 —_--____!_ _.. ‘b |_.__-~..J T34 3 Sheets-Sheet 2 a ‘ - _ 4 3 K1. F, ./g s H n M ' I March 8, 1938. . A. SZILARD ET AL ‘ 2,110,312 TELEPHONE SYSTEM Filed May 17, 1935 s Sheets-Sheet s ' Patented Mar. 8, 1938 2,110,312 UNITED ‘STATES PATENT OFFICE 2,110,312 TELEPHONE SYSTEM Adalbert Szilard and Georg Keleti, Budapest, Hungary Application May 17, 1935, Serial No. 22,09! In Austria May 23, 1934 8 Claims. (01. 179-6) ‘The invention relates to an arrangement for be produced in line 3 of subscriber B, and there telephone systems suitable for automatic con by, according to the invention, device 2 is in nection of calling subscribers A with a central ?uenced in such a manner that a calling sub message oilice in case the called subscriber B is not scriber A is connected automatically to the mes sage o?ice and the interchange of messages is 5 available to answer the call, permitting the inter change of messages in both directions by means of made possible either over the operator's set N or simple auxiliary devices disposed- at the sub by means of automatic speech or signal record ing and reproducing apparatus Z. According to scribers B and of a combined switching and in dicating device, common for a group of such the invention, for each message chosen by B subscribers B. from a plurality of stereotype messages to Arrangements for similar purposes are in use, be transmitted to calling subscribers A, there but these known arrangements do not allow the is a corresponding predetermined different subscribers B to send messages to the calling sub manner of operation of device I, causing corre scribers A without a previous call of B to the sponding peculiar current and voltage conditions message o?lce. In these known arrangements the in line 3 and a corresponding manner of in recording of these messages in the message o?lce ?uencing device 2. The manner in which device requires a great amount of operator's work, fur 2 has been in?uenced is observed by the operator thermore they have the drawback of compara at N who transmits the corresponding stereotype tively high ?rst cost for each subscriber and in message to the subscriber A or this message is so some cases of considerable power consumption communicated automatically, according to the even during the time of no conversation. manner in which device 2 has been in?uenced, On the other hand, the arrangement according by means of apparatus Z in form of signals or to the present invention is such that frequently speech reproduction. Transmission of messages wanted, stereotype messages of the subscriber B which are not stereotype addressed by B to A and recorded beforehand, and the recording of mes 25 which he desires to be transmitted to all sub scribers A calling him, are neither to be com sages addressed by A to B, are effected either municated beforehand to the message o?lce, nor by operators or by automatic recording and re to be recorded there and to be selected from these producing apparatus Z. As shown hereinafter, records in case of a call of a subscriber A. The for communications between B and the message stereotype message set up by B is automatically office a direct connection over device 2 and line 3 indicated to the operator of the message o?ice may be used without any cooperation of the nor simultaneously with the call of subscriber A or the mal switching apparatus of the exchange. message is transmitted by means of suitable re An embodiment of the invention is shown in producing apparatus in a fully automatic manner. Fig. 2. A is the calling subscriber, B the called In the ?gures of the annexed drawings 35 subscriber, VA the automatic telephone ex Fig. 1 shows diagrammatically, the arrange change, to which B is connected, I the auxiliary ment in principle of an apparatus according to device at B, 2 the common switching and indi the invention, cating device for all subscribers of the same ex Figs. 2 and 3 each illustrate an embodiment, change VA.,and a and b the two wires of line 3 shown by way of example, of an apparatus accord of subscriber B. The auxiliary device I comprises 4O ing to the invention, in this case the switch 8 and a variable alternat Fig. 4 shows the detail of a further arrange ing current resistance, composed of a variable ment, in principle, and ‘ Figs. 5 and 6 illustrate details appertaining to condenser K and a variable induction coil W; the embodiment shown in Fig. 2 and in Figs. 2 for each stereotype message of B a ?xed value of 45 and 3, respectively. the A. C. resistance is allotted with ?xed values The idea of the invention is best explained by of K and W. The wires (1 and b of subscribers B reference to the diagram shown on_ Fig. 1. An are connected to corresponding contacts of two auxiliary device I is provided at subscribers B, contact banks of finder Sr, having three wipers. this device being operated by B, if he desires that The primary windings of transformers T are ar subscribers A, calling him thereafter, shall be ranged in wires b‘, whilst one end of the secondary connected to the message o?lce. There is also windings is grounded and the other end is wired to the third contact bank of ?nder S1‘. The ?nd a central combined switching and indicating de vice 2, common for a group of subscribers B. er is permanently driven by the stepping magnet By operating the auxiliary device I, peculiar pre 5Ol determined current and voltage conditions may 10 15 20 25 30 35 50 _ M1, as long as there‘ is no incoming call for a non-answering subscriber B. When a call is 55 8,110,812 , cannot follow the quick vibrations of the bullet, ‘ “switch 8, thereby disconnecting his subscriber's in consequence whereoi it remains attracted dur- ‘ set'and connecting up his auxiliary device I, a ing the time the buzzer is working. As soon as, made, to a subscriber'B who has operated his ringing ‘current of less intensity will result, the the ?nder Sr reaches ‘the line of B, relay R1 is resistance oi device I at the frequency of the ring energized by V, operates and opens at 1'- the cir-i 5 ing current being greater than that of the sub cult of the stepping magnet M1 or ?nder 81', and scrlber's set. As soonas the ?nder sr reaches" as aresult Sr stops. R1 locks. up through Ta and the contacts oi B. the ringing voltage ls‘trans m and extends the wires [a and below '1‘. and n ‘mitted by wipers'Sa‘ audit) to ‘the ampli?er V1 This done, relay R2 operatesby r: and the mew 10 and in its output circuit relay R1 will operate. At subscriber ._B, the wire a being earthed in VA.__ Rs 10 the same time ampli?er Va is also in?uenced by closes at r: the circuit 6! sté vmagnet of “ transiormer T and wiper St, but relay. Rs in the vanin'dicator dial Scmm operates, Sch makes a‘ output circuit oi ampli?er V: does not. operate, ‘ step; and 4M3‘ grounds vwire b'by contact I, in this latter being adjusted to operate only it the 15 normal ringing current is ?owing in wire‘ b. .In this way relay R: is energized by hand a, oper matesand opens at rm the circuit 01' magnet M1,‘ and in consequenoethereoi ?nder Sr stops. R: locks up through Tu, and wires 0 and b are'ex ‘tended by r. and'r‘s. after having been momen tarily short-circuitedduring switching at vthe pre ' contacts 1'" and-n"; so u‘ to bring the apparatus consequence whereoi magnet M of device. I is, released and the ratchet wheel K1 makes a step accordingly. Magnet M: comprises a self-inter rupter; not shown .in the. ?gure, which opens the energizing circuit as soonasthe armature has] been attracted, therefore M; ialls back aiter each attraction. ‘This play oi Ma and M is repeated.‘ ‘until the rotation of‘ ratchet wheel K1 is limited by the stop An. Then the‘ratchet wheel K1 re, in the 'exchange'iVA' into the'talking position. turns to its normal position under action oi a Finally the circuit oiustepping‘ma'gnet Ma oi se-j spring, not shown on the ?gure, tensioned during lector We. is closed atrm. Selector Wagrotates the stepping of K1 and released by An; drop lie 25 anew its wiper Wt successively connects diiier at the‘ same time ‘restored Thus ent oscillatingcircuit 81s to the grid of oscillator 7. the loop of subscriber B','i. eithe circuit oi Rs, ' tube Sefeach frequency of the oscillator tube cor- _' is'opened. and in consequence‘m cannot be ener- ' responds to ‘a ireouency tuned up by. a" certain set glzed again. .“Dlal sch stops aitera's many steps ‘tingoi device 'I. 'As soon as the sameireql'sency‘ as the. ratchet wheel K1 waslallowed ‘to :periorm 30 is sent which corresponds to‘ the setting of device bythe adjustablestop An. 1 Contact K: which is I. these results a resonance current in‘ line‘ '3 open only in the normal position oi dial Bob, is which operates relay R4, by transiormer T; and nowclosed and relay Rois energizedby the back v1h. This relay opens thecircuit oijmag not H: at run; selector We stops and R4 locks up through nu. The operator's set Nand at the same time one oi the talking machines Z areconnected up atrn and by wiper We respectively. [Each oi the talking transmits one’ of the stereo . ‘contact 1'2, disconnecting; R: from wire b at 1's and extending wiresa and b along rs. and Ta to the . operator's set N. ‘Now the operator can read the stereotype message indicated by‘the: position 0! dial; Sch and recognizes, from the position ‘oi ?nd! . er Sr, which subscriber has been called. . After ‘messag'esi and these machines are * the communication and reception of the messagq ‘connectedtto the contacts oi the arc oi move the operator‘presses key.'1‘r,thereby mechanical 40 ’ ment of the wiper We in ,the'proper sequence, so ly releasing dial. Sch. which returns to normal ' that‘the caller has transmitted tom the mes position under action oi a spring“ Relay‘ 86 I sage which corresponds" to the manner in ‘which energized by-the iront contact. oi and theauxiliary device has been operated. The talk-‘ ' locks up through contacts rlsand Tu; ‘Assets: ing - thus transmits to subscriber _A any , as dial Sch has reachedits normal position, on message set on‘device. I, thevoperator communicates the special non-stereotype mes ‘jsage are andrecords the‘message oi A addressed it'o‘BL thereby the operator presses'the key Tr, device I and the operation may circuit of relay R: is ,opened at contact Ks, then ‘ ' .R: releases, the operator’sset is disconnected, and‘ - ‘ the-locking clrcuitoi’R-eisopened at ' oi R1 is opened at run'l‘he circuit oi H1 is closed ‘so again-Vat’ rm. Finder Br moves on and the whole operation .is repeated as soon as itreaches the bodiment is shown in Fig.3, The 'line oi another subscriber who may be called auxiliary device iconsists oi anal-V and 'who does not answer. ' ‘thereuponbe repeated as described. :- . " ternating currentdropF,connectedacrosswires "Inthe cascoibotharrangements sand I; in series with a condenser K, and oi a‘ employment or individual relays ior each sub buzsensu in series» with ‘a stepping magnet it connected also-‘across the wires sand b as soon as the drop F ialis. 'l‘he stereotype message is set up by adjusting stopaAnrensasinse s-ywith scriber for the device 2' has been" avoided.’ this beingrendered possible by‘the employment at the ampli?ers described. by means oi which the signals arriving from the-‘various lines are trans a cam‘disc, thereby allowing a ratchet wheel Kl -mitted toI the common relays. Arrangements” ' driven by magnet M and» keyed“on a common are, however, also possible, which do not require shait- with‘ the cam disc.’ to rotatea certain'num any ampli?er but‘require the employment (I in-_‘ 'ber oi steps corresponding to the serial‘ number dividual relays iorv each‘ subscriber; ' ' , , ' oi the message. Device 1. comprises a ?nder Sr ew'ith two wipers. ‘The wires 4 and b oi sub I scribers 'B are connected to the contact banks, oi Sr. Wipers Ba and 8b are connected by back contacts of R1 to thefinput terminals oi a'gband - The action oi the 'auxiliary‘device I by which it connects A withv device land the‘ signal'trans- ‘ mission‘ between devices I and I i. e.v the kindle! peculiar current and ‘voltage conditions, caused by device'ilin linel, may be di?erentirom those pass ampli?er V tuned to the irequency oi buzzer ~~oi the embodiments ‘described above. Borea 70 Thewindingoirelel?iisconnectedtothe ' ample, device 2 may be influenced by varying: oi V. when B the intensity, V'irequency, phase,‘ or , _ ' been closedandB is called.drop1" iallatmder action oi the ringing current! " ‘ ’ somelother characteristics oi‘the ringing‘tl' food; current, or by supplying'currents or ioreignsourcesprovidcdatBorelsewhereIhioh? 3 I 9,110,812 are in?uenced by device I and affect device 2 over line 3 accordingly. According to the invention the operation of the switching and indicating device 2 may be made invention, provision can be made for a number of stereotype messages different for each sub-. scriber B, e. g. communication of the directory numbers, at which he may be reached at the time being. In this case the selection 01 the meaning of various readings of device 2 for each subscrib er B from records by the operator may be avoid ed by the use of a combined indicating apparatus acting in a well known manner. In the message omce provision is to be made for for this kind of messages-stereotype for anyone subscriber B, but diiferent for different subscrib 10 one or, depending on tra?lc requirements, more ers B--the indications thereof being dependent 10 o?ice lines for communication with subscribers. According to the invention a direct connection not only on the particular subscriber B who was over lines 3 and device 2 may be used for the called, but also on the setting of the called sub communication between subscribers B and the scriber’s device I. Such a combined indicating apparatus is shown in Fig. 6. Wiper S11 is ?xed 15 message o?ice, without the cooperation oi.’ the on the shaft of the finder Sr whilst wiper S1: is 15 switching apparatus of exchange VA whereby a certain manner of operation oi! auxiliary device ?xed on the shaft of the disc Sch as in Fig. 3, so i may set up a direct connection with the op- ' that wiper 811 will switch the indicator lamp of the called subscriber, whilst wiper SI: will switch the erator’s set N over line 3 and device 2. For ex indicator lamp corresponding to the serial num 20 ample, in the embodiment of Fig. 3 this may be 20 ber of the message. Thus the message *to be effected by directing the buzzer's tone from the auxiliary device I over the resistance W1 and transmitted may be read at the crossingpoint oi switch S1 in Fig. 5 to the line 3, thereby causing the row and column marked by lit up lamps. Having now fully described and ascertained our device 2 to stop on the respective line I and to automatic in a greater measure than described as above e. g. by using for recording oi the messages of A addressed to B speech recording apparatus said inventionand the manner in which it is to be ‘performed, we declare that what we claim is: scribed above. 1. A telephone system for the interchange of According to the invention an additional device may be provided at B which indicates if B has messages between calling and non-answering been called during the non-answering period, in called subscribers, comprising a message o?ice, 30 order to induce B to inquire at the message o?ice: an auxiliary device at‘the called station operable Furthermore the calls may be registered at B or to produce predetermined di?erent current or voltage conditions in the called line, means for in the message o?ice by means of metering de setting said auxiliary device to operate in a se vices e. g. for accounting purposes, or the time of engagement of device 2, of the operator, or of lected manner, a signal operable in predeter mined di?erent ways corresponding to the diii’er 35 apparatus Z may be recorded continuously and ent- settings of said auxiliary device, switching separately for each subscriber. and indicating apparatus common for a group 0! During the time when device I is in the non called subscribers and responsive to said different answering condition, the bell may be left con nected, possibly with a weaker tone, in order to current or voltage conditions, and means con trolled by said apparatus ior connecting the call 40 make B cognizant of the call, should he have 25 establish the connection to N in the manner de forgotten to restore his device I into the answer ing condition. By these means the operator is enabled to give a special ringing signal to sub scriber B in urgent cases and in those which have 45 been previously pointed out by B or marked as desirable by setting his device I accordingly. According to the invention it the trafiic with the message office is very intensive, further switching and indicating devices 2' shown in 50 Fig. 1 may be employed for the same group of subscribers, in which case provision should be made in ways for avoiding double connections. On the other hand, certain parts of the switch ing and indicating device may also be common for Q1 iii various groups of subscribers, as shown in Fig. 4. In other cases, when the tra?ic is moderate, as at night, etc. the service-oi! several devices 2 serv ing di?erent groups of subscribers (e. g. in dif ferent exchanges VA) may be combined; in this 60 case some parts of device 2 will be situated at a considerable distance from the others and con nected with them over trunk lines. In such cases such indications oi.’ device 2 which cannot be read directly, are to be transmitted to the op 65 erator over trunk lines-in known manner. In order to accelerate operation, according to the invention, lamp indicators working in well known manner may be used for the indication of the positions. A certain part of the stereotype messages will 70 be the same for all subscribers B, e. g. the cause of failure to answer: absence, nighttime etc.; fur thermore certain limitations of answering, e. g. only for toll calls; ?nally the time of the next‘ reply condition and the like. According to the 75 25 30 35 40 ing subscriber to the message office and for ac tuating said signal in accordance with the setting of said auxiliary device. 2. A telephone system for the interchange of messages between calling and non-answering 45 called subscribers, comprising a message o?lce, an auxiliary device ‘at the called station operable to produce predetermined di?erent current or volt age conditions in the called line, means for set ting said auxiliary device to operate in a selected 50 manner, a signal operable in predetermined dif ferent ways corresponding to the different set tings of said auxiliary device, switching and in dicating apparatus common for a group of called subscribers and including?nders responsive to ' the di?erent current or voltage conditions in a particular called subscriber’s line, and means controlled by said apparatus for connecting the calling subscriber to the message omce and for actuating said signal in accordance with the setting oi said auxiliary device. * 3. A telephone system as set forth in claim 2, said ?nders comprising parts adapted to move in a step-by-step manner. ‘ 4. A telephone system for the interchange of 65 messages between calling and non-answering called subscribers, comprising a message oince, an auxiliary device at the called station operable to produce predetermined dii’i'erent current or voltage conditions in the called line, means for 70 setting said auxiliary device to operate in a se lected manner, a signal operable in predetermined different ways corresponding to the different set tings of said auxiliary device, switching and indi cating apparatus common for a group of called 75 " 4 t , a,11'o,‘s1a_ ‘ subscribers and responsive’ ‘ ‘ v, w ’ dlilerent cur-‘w‘f‘tlihfl; In a telephone system, an unattendedsub rent‘ or voltage conditions, and means controlled by said apparatm i'or connectingthe calling sub scriber to the‘ message once and for, actuating sc?ber’sstation, a subscriber's set,» a message storing. and. -se'nding device having a'plurality voi? possible settings corresponding to ,diilerent ma signal in accordance with the setting .0! said predetermined stereotype ‘messages and connect auxiliary device; ma switchingapparatus com prising an amplifier responsive to said diiierent ,current or voltageconditions, and undermin ?uenced by said ampli?er, said ?nders compris 10 ing parts adapted to move in a step-by-step man , ner. ; 5. Aatelephone abie to subscriber'sllinean operator's posi tion, ‘an operator's set,‘an,indicating device ‘at said operator's comma switch having accessto ‘ ,saidwubscriber's incoming to, said subscriber’s line and y?respons’iverto line for ‘completing T connection between the calling sub m the interchange oi .aftalking scriber and-the operator'at said position and I messages between calling and 1_ non-answering simultaneously establishing a signal‘ transmis sion over said‘ subscriber's line between said mes auxiliary device at the called station‘ operable sage-‘storing and -sending device and said indi 15 111s .;an‘ to produce predetermined ‘diilerent currentor cating device. ' ‘ voltage conditions in the called line, ior vii. In‘ a ‘telephone system, an unattended ‘ ‘setting said auxiliary devicegtooperate in a se scriber’s station, a subscriber's set, amessage , lected manner, a signal operable in predetermined storing and -sending device’having a' plurality d'lil'erent ways corresponding to thedi?ferent set. 01’ possible settings . corresponding to diilerent wtin‘gs oi’ said auidliarydevice. switching and indi-r predetermined stereotype messages‘ and’ connect ‘cating'apparatus ‘common for a group ofecalledr able to said subscriber's line, an operator's posi subscribers and responsive to said diii'enent cur tion, an‘ operator'sset; an indicating device at rent or voltage conditions, and means controlled said positloma switch having access to said lub by said' apparatus for connecting, the calling sub scriber's‘line and responsive to a-call incomingto scriber ‘to the message omce and Ioractuating I said line for; completing a talking connection be 25 "said signal, in accordance with thesetting of tween the calling subscriber and the operator at said auxiliary device; said switching apparatus said position and simultaneouslyestablishing a comprising‘ a ‘means responsive to said diiierent ', signal transmission over said subscriber's line be current ‘or voltage conditions, and ?nders‘ in tween said message-storing and -sending>device so a called subscribers, comprising a messageo?ice, ?uenced by, said‘means, said ?nders comprising ' ‘and said indicating device,said message-storing , parts adapted to move in a stepqby-step manner. i and ‘-'sending device and said message-indicating ‘ ' ' 6. In a telephone system, .the combination with Y " the elements set forth in claim-1' oi’ an indicating 35 device associated with said switching apparatus, and means for automatically causing said indi cating device to function so as to indicate ‘which particular subscriber has been called. device both comprising parts movable in a step by-step manner and adapted to operate Iin'syn chronism it connected one-to the other over said 85 subscriber's line. ' ‘ . ADALBERT i‘ Y GEQRG .