DE570435C - Circuit arrangement for telephone systems with semi-automatic operation - Google Patents

Description

GERMAN EMPIRE

ISSUED ON
FEBRUARY 21, 1933

REICH PATENT OFFICE

PATENT LETTERING

CLASS 21a ³ GROUP

Patented in the German Empire on December 6, 1927

The invention relates to a circuit arrangement for telephone systems with semi-automatic Establishment in which connections of different values are established via the same voters will. In semi-automatic exchanges, that of a calling one is generally used Place occupied voters automatically via a special access with a job related from which

ίο the establishment of the desired connection takes place via the occupied voter.

Should now from the workplace via the same voters of the semi-automatic exchange Even high-quality connections are established, so the switching of the for different-valued connections could be common to be used via a special connection line that can only be used from the workplace or by making

ao special switching measures are brought about by the officer. But this requires one further time-consuming burden on the officer or the provision of special ones, only for long-distance connections lines to be used between the workplace and the voters of the semi-automatic exchange.

The object of the invention is now to provide the same connecting lines between the workplace and to the voters of the exchange for the different-valued connections use without the officer special switching measures to initiate high-quality connections must make. This is achieved according to the invention in that the voter to establish inferior connections occupied via one access and automatically via a second access with a workstation is connected, on the other hand for the production of high-quality connections only via the second access is occupied from the workplace and is provided with switching devices, which, depending on the type of occupancy, are used to establish high-quality or low-quality connections determine the required working method of the voter.

As an embodiment of the invention, a telephone system has been adopted in which connected several exchanges with semi-automatic operation to a manual exchange are. Connections between subscribers of exchanges connected to handset D (e.g. A or C) with each other or with subscribers of sub-exchanges connected to such exchanges (e.g. B), i.e. participants Ni with N 2 or with N 4 are considered inferior Connections, while high quality connections are considered to be those between Subscribers of exchanges connected directly to exchange D (e.g. A and. C), e.g. B. Participant Ni with participant N6.

*) The patent seeker stated as the inventor:

Josef Kuchley in Berlin-Siemensstadt.

57043 »

The individual exchanges, such as A, B, C, are only equipped with preselectors and line selectors. Switch-on dialers are assigned to the connecting lines.
In the accompanying drawings, Fig. 1 to 3, the subject matter of the invention is illustrated and described in more detail below, and local battery operation is assumed for the connected subscribers. It is initially assumed that a subscriber Ni connected to the exchange A wishes to be connected to a second subscriber N 2 of the same exchange. So this connection is an inferior connection. The subscriber N1 is in a known manner via a preselector or call finder with a free line selector, ζ. Β. LW ¹ , connected.

In the latter, the relay C is made to respond when occupied via the wire c ^1. C binds via its contact 44 c and contact 45 v ² . The relay / is applied to the test contact of the switch-on selector AW ¹ via contact gc. At the same time, the relay R ¹ speaks of Anschaltwählers AW ¹ to about: battery, winding of R ^1, contacts 9 ft ^2, log, nc, ground and switches the rotary magnet Dm ² of the Anschaltwählers AW ¹ a via: Battery winding of the rotary magnet Dm ^2, Contacts I37 ¹ , 14ft ² , breaker Un ¹ , earth. The voter keeps turning until his switching arms have reached the calling set of connections. At this moment the relay I and P ^{2 will} respond via: battery, winding 1 and 2 of relay I, normally open contact gc, test arm of the switch-on selector .4W ¹ , contact 12 x, winding I and II of relay P ² , earth. The connecting line α ² , δ ² to the line selector LW ^{1 is switched} through via the contacts 46 £ ² and 4.7ft ^2. Via the contacts 16g, 171 and 18g, earth is applied to the wire α ^{2 of} the connecting line, which is switched off again after a short time when the relay G responds. When relay P ² responds , the circuit for relays R ¹ and Dm ² at contacts ^{gft 2} and 14 £ ^{2 is} interrupted. Relay R ¹ drops out, the selector AW ¹ is stopped. Relay / shorts its winding 2 via contact 531 and relay P ² shorts its winding I via contact 76 ^. When relay / responds, relay F ¹ is also excited via: battery, winding of relay V ¹ , double normally open contact 171, contact 18 g, earth. The response of F ¹ results in the excitation of relay G, winding I via: battery, winding I of G, contacts 22a ¹ , 23a ² , 24c, earth. Relay G interrupts the circuit for F ¹ and the earth connection for wire a ^{2 of} the connecting line through contact 18 g. The temporary application of earth in the line selector causes relay A (Fig. 3) in the handset to respond via: battery, winding I of relay A, contact 19 b, wire a ^{2 of} the connection line. A binds and brings the call lamp AL over: battery, winding II of relay A and call lamp AL, double work contact 20 ″, break contact 21 δ, earth to burn.

If the officer puts the interrogation plug ^ 4 Si ¹ into the jack VK, the response of the relay B causes the following to drop: battery, winding of relay B, jack sleeve VK, interrogation plug ASt, earth, relay A , and the call lamp A ¹ also goes out. Relay K in the line selector (Fig. 2) is excited via the choke coil DR ¹ in the officer's cord circuit via: battery, winding I and II of relay K, contact 16g, switching arm of AW ¹ , contact 46 ^> ² , line a ² , jack VK and plug ASt ¹ , upper voice wire of the cord circuit ^{, interrogation switch HTa 1} , throttle Dr ¹ , earth. Relay K brings relay H to respond via its contact 26 k. The officer puts the query switch A Ta ¹ , A Tb ¹ and asks. If the subscriber has now hung up his receiver again, the officer sends by switching the call circuit R ¹ ringing current to the subscriber, whereupon the latter answers and the officer indicates the desired connection to subscriber N 2. 9c

The officer then selects the desired subscriber number by actuating her impulse transmitter, of which only the impulse contact 59 m is shown. Each time the $ gin contact closes, the following circuit for the relay / is closed: Battery, winding I and II of relay K (Fig. 2), contact 16 g, switch arm of selector AW ¹ , contact 46 ^ 2, line α ² , Jack VK, interrogation plug .4Si ¹ , ATa ¹ , impulse contact 59 in ^{ATb 1} , interrogation plug ASt ¹ , jack VK, line δ ² , contact 47 ^> ² , switching arm of AW ¹ , / relay, earth. The calling subscriber is disconnected during the Stromstpßgabe by the contact 27 v ¹ , since relay F ^{1 over} at the first rush. Contact 481 has responded and remains as a delay relay even during the current impulse. With each current impulse picked up by the relay / the rotary magnet Dm ^{3 of} the line ^{selector LiF 1 is} excited in the following way: battery, rotary magnet Dm ³ , contacts 49 ^, 54 ^> ³ , 5oe, 2 $ v ² , 24c, earth. As a result, the switching arms of the line selector LW ^{1 are set} to the connection contacts of the desired subscriber line a ³ , b ³ , c ³ . After the series of ^{impulses has elapsed, the F x} relay drops out again and the relay P ³ is applied to the test arm of Z, TF ¹ . If the participant is free, the relay P ³ speaks to: earth, contacts 24c, 23a ² , 32 0.31 ν ¹ , 291, windings I and II of relay P ³ , contact 55 v ¹ , contact gou, test arm des Line

Selector LW ¹ , test wire of the desired subscriber line to the battery via the winding of the subscriber relay assigned to this subscriber line. The officer now applies ringing current to the connection line ar, b ^% by pressing the call button R ¹ , which reaches the desired subscriber via the line selector. A small part of the ringing current is transmitted to the calling party via the capacitor 56 as a dial tone.

If the called subscriber answers and the officer has convinced herself of the correctness of the selected subscriber, she pulls the interrogation plug .4Si ¹ out of the jack VK of the connection line and thereby causes the relay K in the line selector LW to drop. When the relay K drops out, the relay P ² of the switch-on selector AW ¹ connected to the test wire shorts through its contact 59 k , this drops out and releases the connection? - line for further calls by opening the contacts 46 p- and 47 ^ and Closing of contacts gp and 14 /> ² . Before waste of relay K and opening its contact 26, a holding circuit is k for relay H come about on: the battery, the winding of relay H, contacts 60/2, 62c, 6IP ^3, 32c, 23z ^'2, 24c, earth. When relay P ² drops out, relay I is held by: battery, winding 1, contacts 531, gc, 57 and 59, earth.

The S relay is now with its winding I in the line selector LW via contacts 63 Ji and 64 k in a bridge between the speech wires. When the conversation between the two subscribers is over, the connection that has been established is released when the final signal is given by means of the inductor of one of the two subscribers by addressing the relay S via its contacts 63A and 64 / ". This is linked via:

Battery, winding II of relay S, working contacts 40s, ing and nc, earth and causes relay F ² to respond via: battery, winding I of relay F ² , contacts 39s, mg, nc, earth. The response of relay F ^a initially results in the interruption of the holding circuit for relay C by opening contact 45 V ² . Furthermore, the holding circuit for relay P ^{3 is} interrupted at contact 23 t ' ² , which also drops out. This causes relay H to drop out by opening contact 6ip ^s . If relay C drops out, the circuits for relays G and S are interrupted at contact nc, while relay F ² remains via the following circuit after C and S drop out ^{: Battery winding III of F 2} , contacts 68c, ^{6gdm 3} , Joe, contact segment 86, switch arm 85 of selector LW ¹ , contact 8 V ¹ , earth. After H has dropped, rotary magnet Dm ^{3 is} excited via: battery, rotary magnet Dm ³ , contacts 71 v ^% , 66Ji, 67 k, 932, earth. The holding circuit of the relay F ^{2 is} interrupted at the contact ^{6gdm 3} , so that it drops out and the circuit for the rotary magnet Dm ^{3 is} interrupted at the contact 71 v ^2. After the drop of Dm is ³ at the contact 69 dm ^3, the relay F ^2, winding excited III again and closes the contact 71Z ^'2 represents the circuit for Dm. ³ This interaction between Dm ³ and F ² continues until the switching arm 85 has left the contact segment 86, whereupon the line selector LW ¹ has reached its rest position. As soon as the switching arm 85 has reached the zero position, the holding circuit for relay F ^{2 is} interrupted, so that it finally drops. Then all the facilities used for the connection have come to their rest position.

W ^T hen the desired subscriber is busy, so relay P ³ can not respond and switches in a known manner a busy signal. If the officer pulls the plug ASt ¹ out of the latch VK , relay K drops out in the line selector and closes the following circuit for relay V ² : battery, winding I of F ² , contacts 65p ³ , 87h, 67k, 93 *, Earth. The connection is then released in the same way as described above.

In the above-described case, the line selector LW ¹ is occupied by the subscriber via an access α ¹ , δ ¹ , c ¹ and connected to the workplace of an officer via a second access and the switch-on selector AW ^1. He therefore works as a local line selector.

The following is the creation of a high-quality connection, e.g. B. between the subscriber N 5 of a switching center C connected to the main office D with a Participants, e.g. B. Na, a second, connected to the main office D switching 10c place A, described.

Since the facilities of the exchange C are the same as those of the exchange A, the subscriber N 5 is switched through to the officer in the main office D in the same manner described above. The latter queries with plug .4Si ² and establishes the connection to the desired subscriber N 2 of exchange A as follows:

The officer puts the plug ASt ¹ of the pair of cords used for interrogating the subscriber N 5 into the jack VK assigned to a free connecting line leading to the exchange A. As a result, ^{earth is connected to wire «2 of} the connecting line via the choke Dr ¹ (Fig. 3) in the cord , and relay X in the switch-on selector .4IF ¹ (Fig. 2) responds via: battery, relay X, contact 46 p ² , connecting line « ² , jack, plug ^ 4Si ¹ , button ATa ¹ , throttle Dr ¹ , earth. Relay X energizes via contacts 72χ and gp * relay R ¹ , which drives the rotary magnet Dm ^{2 of} the

Selector AW ¹ switches on via contact 13 r ¹ and 14 f ^2. This is looking for a free line selector LW ¹ . The relay X has switched on relay P ² at the same time to the test arm of the selector AW ¹ . P ² and E address via: battery, winding I, relay E, contacts 73 g, 74g, 75 c, test arm of the selector AW ¹ , winding I and II of relay P ² , earth. P ² stops the rotary magnet Dm ² by opening its contact I4 ^> ² and switches the connecting line « ² , δ ² through by closing its contacts 46p ² and 47 ^> ^2. P ² shorts its winding I via its contact 76 ^. Relay E opens the short circuit for its winding II through its contact 730.

Relay K is triggered by: battery, winding I and II of relay K, contacts 861, normally closed contact 16 g, switching arm from selector AW ¹ , contact 46f ^z , line a ² , latch, ao plug ^ tSi ¹ , button A Ta ¹ , Throttle Dr ¹ , earth. Relay K causes relay H to respond via contact 26 k.

The officer pushes the query key ATa ¹ and Atl · ¹ and selects the desired subscriber number with a surge transmitter, of which only contact 59m is shown. Relay K is now held on the interrogation line via the throttle Dr ^s . Relay / in the line selector LW (Fig. 2) follows the current impulses of the current impulse transmitter and responds to each current impulse via: Battery, winding I and II of relay K (winding II is then short-circuited via contact 25 v ¹ , since relay F ¹ at first current impulse is excited via 48 ^), contacts 861, 16g, switch arm of selector .4W ¹ , contact 46 £ ² , line « ² , latch, plug ASt ¹ , buttonATa ¹ , contact 59m, button ^ Tö ¹ , plug .4Si ¹ , Line δ ² , contact 47 φ ² , switch arm of selector AW ¹ , contact iog ^ ¹ , relay /, earth. The rotary magnet responds via: battery, winding of the rotary magnet Dm ³ , contacts 49 «, 54fi ^s , 112e, earth. As a result, the selector LW ^{1 is set} to the connection contacts of the desired subscriber line. Relay V ¹ drops out again after the series of impulses, relay P ¹ is placed on the c-arm of selector LW ¹ and responds via: battery on line c ³ , test arm of selector LW ¹ , winding of relay P ¹ , contacts 1051 , 31a ¹ , 106 e, earth and energizes relay P ³ via: battery, contact xojf ¹ , winding II and I of relay P ³ , contact 108 e, earth. P ³ responds and briefly closes its winding I via contact 6xp *.

When relay P ¹ responded, relay / from wire δ ^{2 was} switched off at contact 109 ^ ^1. The further establishment of the connection now depends on whether the requested subscriber is free or busy. If the participant is free, the officer calls him by pressing the * call button 22 ¹ Ui on the cord (Fig. 3). If the subscriber is busy with an inferior connection, the officer informs him of the long-distance call available to him and disconnects the existing inferior connection by pressing the disconnect button TT. This will earth via ATb ¹ , plug ^ S * ¹ , jack VK, line δ ² , contact 47 -p ² , switching arm of AW ¹ and. applied via contact 35 ^ ¹ to the lower speech wire of the line selector LW ¹ . This earth creates the following circuit for the release relay S of the line selector, via which the inferior connection runs: earth (as described above), contact 52 ^> ³ , switching arm of LW ¹ , line δ ³ , multiple switching of the line selector, switching arm, Contacts 5256 ^s , 64A, 63Ä, winding I from S, contacts 88i, ζχφ ³ and switching arm of the line selector of the inferior connection, multiple switching of the line selector, upper switching arm of LW ¹ , contacts 5xp ³ , 88i, xxo-p ¹ , Choke Coil Dr, Battery, Earth. Relay S binds in the line selector of the inferior connection and causes the inferior connection to be triggered in the manner already described for such a connection.

The participants N 5 and N 2 can speak to one another. If the participant has N 2 his receiver hung up again, so he is called by the officer.

In the case described above, the line selector LW ¹ is only occupied via an access from the officer and works as a long-distance line selector.

After the end of the conversation, the relay S ¹ or S ² in the cord circuit is energized when a subscriber gives the final signal by actuating his inductor. The holding winding II of the relay S ¹ or S ^{2 is} switched on via the contacts 102 s ¹ and 101 dr ¹ or 104s ² and 103 dr ^z. At the same time, the tail lamp SL ¹ or SL ² lights up. The officer removes the plug .4Sa! ¹ and ASt ² from the jack VK and the jack of the occupied connection line leading to the exchange C. In the line selector LW ¹ (Fig. 2) the relay K drops out and closes its contact 59 A, while the contact 26 k is opened. Relay H is a delay relay and keeps its contacts switched for a while. ^{Relay P 2 is} short-circuited via contacts 59 ^ and 58A and drops out. As soon as contact 58 / i is opened, relay E also drops out. This interrupts at its contacts 106 β and 108 & the holding circuit of the relay P ³ , so that this also drops out. The following circuit for relay F ^{2 is established} at contact 700: earth, contact 8v ^x , switching arm 85 and contact segment 86 from LW ¹ , contacts e, 69 dm ³ , 68 c, winding of F ² , battery, earth. The relay F ² then switches off

solution of the line selector LW ¹ brought about in the manner described above.

The devices in the exchange C are triggered by the relay K dropping out when the plug is pulled at the workplace in the same way as described above for the case of the busy person N 2.

Claims (2)

Patent claims: i. Circuit arrangement for telephone systems with semi-automatic operation, in which different-valued connections are made via the same voters, characterized in that the voter (LW ¹ ) is occupied for making low-quality connections via one access and is automatically connected to a workstation via a second access, on the other hand to Establishing high-quality connections is only occupied via the second access from the workstation and is provided with switching devices (C, I, P ¹ ) which, depending on the type of occupancy, are automatically used to establish high-quality or inferior connections, depending on their type determine the required working method of the voter. 2. Circuit arrangement according to claim 1, characterized in that the switching devices (C, J) prevent the effect of the special switching operations (disconnecting a local connection) required only for the production of high-quality connections (disconnecting a local connection) when producing an inferior connection when the officer initiates these switching operations serving switching measures (earthing the wire δ ² ) undertakes. For this purpose 2 sheets of drawings