DE621921C - Circuit arrangement for telephone systems in which unstrengthened and reinforced through connections are made - Google Patents

Description

GERMAN EMPIRE

ISSUED ON «." NOVEMBER 1935

REICH PATENT OFFICE

PATENT LETTERING

CLASS 21a ³ GROUP 57

Siemens & Halske Akt.-Ges. in Berlm-Siemensstadt *)

Patented in the German Empire on November 9, 1930

The invention relates to a circuit arrangement for telephone systems in which reinforced and unamplified through connections are established.
In the known systems of this type, the establishment of through connections is carried out by the telecommunications officer through the intermediary of a transit officer, in that the former connects to a transit point at which a repeater is switched on, depending on whether the connections are not in need of reinforcement or not in need of reinforcement or (another transit point where the connection is completed without the amplifier being switched on. The remote officer must therefore always carry out special additional switching measures in order to use a second officer.

The present invention avoids taking this particular shift action and thereby brings a significant simplification of through traffic. This is achieved by the fact that the line occupied by the remote official is known per se Way switching devices are assigned, which only when selecting traffic directions for which a voice stream amplification is necessary to automatically activate the connection of a passage.

In the drawing, an embodiment of the invention is shown, and only the facilities essential for understanding the invention of the office are shown, via which under EinihaLtunig 'an amplifier a connection on the trunk line F _x to a subscriber to another office , in which the long- distance line F ₂ ends, is connected, is to be completed. FP ₁ indicates the remote place with the incoming trunk line .F ₁ , Ue the transmitter belonging to the incoming line with the follower M ₁ arranged therein and MW the mixer selector which is also assigned to the line, while the passage place is indicated with DPI. For a better overview, the individual parts and equipment of the system are marked by dashed lines.

The arrangement works as follows: If a call is received via the trunk line F ₁ at the remote station FP1 , the remote officer accepts the request of the calling station and sets up the desired connection with the other office (not shown).

*) The patent holder has indicated as the inventor:

Dipl.-Ing. Hans Grubrich in Berlin-Spandau.

concluded subscribers by dialing their call number via the group selector GW, the transmitter Ue and the η associated connection devices in a known manner. The devices shown in the drawing are effective in the following way: After setting the group selector GW , the relays P ₁ and C ₁ respond. Relay C ₁ opens its contacts ι C ₁ , 3 C ₁ and 39C ₁ and closes: Zc ₁ , 4.C ₁ and 42C ₁ . By closing 2, C ₁ talks about dia ₂ au led F in the downstream connection means lying feeding bridge the relay S On, its contact 43 s in the Lage44J and closes 38 s> through the last contact operating speaks relay B at over Earth , Contacts _{42c 1} , 38J, windings II and I of relay E, battery, .ground. Relay E closes contact 45 e and thus establishes a hold circuit for relay S ¹ via: earth, contacts 42 C ₁ , 45 e, 44 s, winding II of relay S, battery, earth.

When the next impulse is given, relay A responds repeatedly and transmits. 25 the absorbed current pulses through its contact r α on the outgoing _{trunk line F 2} . Furthermore, relay A puts contact 35 α in position 360 each time it is operated, so that when contact 36 a is closed, a circuit for relay V is established via: earth, contact 36 α, relay V, battery, earth. Relay V closes its contact 37z / and is thus maintained via this contact during the impulse. In addition, it short-circuits the contact 46 υ and thus short-circuits the secondary windings of the speech current transformer SpUe and the winding I of the relay 5 for the purpose of better current surge transmission. Furthermore, it opens the contact 47 ν in order to prevent undesired capacitor discharges. Relay A closes the contact 6 <a each time it responds and thus via: earth, contacts 6 a, yh, rotary magnet D ₁ , battery, terie, earth the circuit for the rotary magnet D _{1 of} the follower ML, whose switching arms correspond to the ones recorded Power surges are forwarded. It .sei now assumed that a connection in need of reinforcement is to be established and therefore a certain combination of current impulses, in the present example initially two and then three current impulses, are sent out by the remote officer after setting the group selector GW. If the follower is advanced by two steps by the first series of current impulses consisting of two current impulses, then speaks. Relay O on via: earth, contact 10 O ₃ arm χ of the follower, relay O, battery, earth and closes contacts 80 and 90. This creates a "holding circuit for itself: earth, contacts 4C ₁ , 8 0, relay O, battery, earth. If the next series of current impulses, which consists of three current impulses, is sent by the remote officer, the last time relay A responds, a circuit is closed via: earth, contactless, Ατναχ of the follower, relay W ₂ , contact 9 0, relays H, battery, earth. relays N ₂ and H talk to in this circuits. ^ V ₂ closes the contacts 14M ₂ and 15 n ₂ and thus sets out the line F ₂ corresponding replica Nb ₂ to the switching arms 1 and 2 of the mixing selector MW further includes relay _N2 contact 11W ₂ relay H closes the contact 48 h, so that the relay 2V ₂ and H above. earth contact 48 h, arm χ of the follower, relays N ₂ , contact 9 0, relay H, battery, earth during the following series of current impulses. In addition, relay H opens the contact 7 h and thus prevents the magnet D ₁ from being influenced by the next series of current impulses.

If the downstream connection devices have been set by the series of impulses, the remote officer applies the remote criterion to the voice wires and thus causes a potential change in the connection device downstream of the transformer Ue on both voice wires, so that the winding I of the relay 6 ″ is connected against the winding II of this relay -will and therefore relay 5 "temporarily drops. Here, contact is 44 s in position 43.? laid and opened 385. However, since relay E drops out more slowly than relay S, a circuit is temporarily closed for relay F via: earth, contacts 42C ₁ , 45 ^, 43s, relay F, battery, earth. Relay F closes contact 41 / and thus a holding circuit for itself. In addition, by closing contact $ f , it creates a circuit for relay U via: earth, contacts 11M ₂ , 5f> relay U, battery, earth. Relay U responds, closes contact 16 % and switches contacts 17 ", 18", 19M and 20M to positions 21 U ₃ 22U, 23 ", 24%.

By closing the low contact, a circuit for relay C _{2 of} the mixer selector MW is established, and this relay responds. It closes its contacts 25 C ₂ and 2Oc ₂ . Closing contact 25c ₂ energizes relay R via: earth, contact 25C ₂ , relay R ₁ resistor ^, battery, earth. Relay R closes the contact 27r and thus brings the magnet D _{2 of} the mixer selector M1'F to respond to: earth, contacts 28 ^ ₂ , r, magnet D ₂ , battery, earth, so that the switch arms of the mixer selector take a step. Magnet D ₂ closes contact 29 e ₂ and thus creates a short circuit for relay R , so that it drops out and

takt 2jr interrupts the circuit for magnet D ₂ again. When magnet D _{2 falls} , "contact 29 ^ _{2 is} opened, so that the short circuit for relay R is canceled and this relay responds again. It then closes the circuit for magnet D ₂ again, and the interaction between magnet D ₂ and Relay K repeats itself with simultaneous switching of the arms of the mixed selector until the selector has set itself to a free amplifier Vst to be switched on from the passage DPI . At this moment the relays P ₂ and C ₃ respond via: earth, ReIaIsP ₂ , contact 2Oc ₂ , arm 7 of the mixer selector MW, winding I of the relay C ₃ , contact 30C ₃ , battery, earth. Relay P ₂ closes the contact 31 ps and thus blocks the free amplifier cord occupied by the mixer selector at the passage point DPI against repeated use. Relay C ₃ closes contact 32 C ₃ when it responds, via which it lights up the lamp AL , and places contact 30 C ₃ in position 33 C ₃ , so that it extends over its windings I and II holds.

When the lamp AL lights up , the transit officer recognizes that a connection in need of reinforcement is to be established and, by connecting her interrogator, not shown, connects to the remote officer via the following route: interrogator, arm S of the mixer selector, contact 22 u, arm b of the Group voter.? GW, remote station FPl, arm a of the group selector GW, contact 21 u, arm 6 of the mixed selector MW, to the interrogation apparatus of the transit officer. This officer then learns from the remote officer that she should connect her amplifier cord to the long-distance line · F ₁ ending in the latch Kl , and then inserts the plug St into this latch. This means that the amplifier Vst is switched on in the connection path set up by the remote operator, and the conversation can be

+5 after the desired participant has been called by the remote officer in a known manner and has reported, via trunk line F ₁ , remote place FPl, Klinke Kl, plug Si, amplifier Vst, arms 3 and 4 of the mixer MW, contacts 23 μ and 24 u , Speech current transformer SpUe ₁ outgoing trunk line F ₂ and the downstream connection devices take place. The conversation is monitored by the remote officer, and after it has ended, the busy connection devices are released by her in a known manner.

As soon as the group selector GW is switched to the rest position, relay C ₁ drops out and closes its contacts 1 C ₁ , 3C ₁ and 39C ₁ and opens 2C ₁ , 4 ^ ₁ and 42 C _1. ' By closing 3 C ₁ , a circuit for the rotary magnet D _{1 of} the follower ML is established via: earth, contacts 3 C ₁ , 34 ^ ₁ , arm y of the follower ML, segment s, rotary magnet D ₁ , battery, earth. The: Magnet D ₁ responds and switches the arms of the follower by one step forward. At the same time, he opens his contact 34Cf ₁ and thus interrupts his circuit. This causes contact 34 Ci ₁ to drop again, and the circuit for magnet D ₁ is re-established, so that the arms of the follower take another step. This switching of the arms through the self-interruption of the circuit for the magnet D ₁ continues until the follower has reached the rest position. When contact 4C ₁ is opened, the circuit for relay O is also interrupted, so that! this also drops and its contacts 8 0 and 9 0 opens. Opening 9 0 de-energizes relay N ₂ and opens its contacts 14M ₂ and 15W ₂ . Furthermore, the circuit for relay F is interrupted by opening contact 42 C ₁ , so that relay F drops out and contact 5 f opens. As a result, relay U also drops out and opens contact 16 u. This in turn _{causes relay C 2} to drop out, which opens _{its contact 2Oc 2.} As a result, the circuit for relay P ₂ and relay C _{3 is} interrupted, so that these relays also drop out and thus the devices shown in the figure are again in the rest position.

If the remote officer establishes a connection via a line leading to another office which has a different characteristic than line P ₂ , e.g. B. by sending out initially two and then again two current surges after setting the group selector GW, so speaks about: earth, contact iov, arm χ of the follower, relay 2V ₁ , contact 90, relay H, battery, earth the relay 2V ₁ to and closes the contacts 12% and 13M ₁ , whereby the simulation Nb ₁ corresponding to the line leading to the other office is connected to the switching arms 1 and 2 of the mixer selector MW . The rest of the connection then proceeds in the same way as described above.

Claims (5)

Patent claims: i. Circuit arrangement for telephone systems, in which unamplified and reinforced through connections are made, characterized in that the line occupied by the remote officer is assigned switching devices (ML, MW) in a manner known per se, which only when selecting traffic directions for one Speech stream 621931 amplification is required, automatically cause the connection of a passage place (DP ₁ ). 2. Circuit arrangement according to claim i, characterized in that the line occupied by the remote officer is assigned a follow-up plant (ML) which is sent by the officer at the remote station (FP ₁ ) for the production of a ίο the connection serving series of current impulses is switched on and, if the established connection requires reinforcement, the incentive circuit of a voter (MPF) closes, which adjusts to a line leading _{to a free passage (DP 1).} 3. Circuit arrangement according to claim 2, characterized in that the selector influenced by the follow-up mechanism adjusts to a free amplifier (Vst) which is switched on by the officer at the passage in the connection path. 4. A circuit arrangement according to claim 2, characterized in that the follow-up mechanism (ML) simultaneously with the incentive of the voter (MW) turns on the switch arms of the dialer to the speech wires of the connection established by the telecommunications operator. 5. Circuit arrangement according to claim 2, characterized in that the follow-up mechanism simultaneously with the incentive of the voter (MW) depending on the characteristic of the occupied line (F ₂ ) the connection of the corresponding simulation (IV ₁ , N ₂ ) to the switching arms of the Voter causes. 1 sheet of drawings