SU57631A1 - Cord gifts device manual telephone exchange with two-wire cord and plug mi (Central x 2) - Google Patents

Description

For the purpose of saving the linear structures and increasing the coefficient of their use, a number of schemes have been developed that allow two subscribers to be connected to one line (twin installations). However, in all known schemes at the station, it is necessary to occupy a separate number for each subscriber, i.e., the utilization rate of the station part does not increase.

From this it follows that the distribution of paired installations is possible only if there is a free station capacity, and since there is no such thing at all stations, the paired installations are hardly used.

The proposed, according to the invention, scheme of a cord pair of a commutator of a central bank system with two-wire cords (central bank x 2 l) allows to connect two subscriber units working on the principle of paired to one jack. This is achieved by adding one relay, one button to the cord pair circuit, and, in addition, one pole of the machine inductor (or transformer) is grounded.

The method of switching on the relays and buttons is shown in the attached drawing, depicting a cord pair diagram and having the following designations: OSH - interrogation plug, VSh-call plug, OPj and OP - breakaway relays, OJIi and OJI - breakaway bulbs, RC-coil, Oj, О - 5 ,, B - contact springs of a questionable ring key, ШК-cord-contact, РД - additional relay, Д - additional button. G-phone.

The L button, for the time it is pressed, closes the RL relay circuit, which is triggered, is blocked through its own contact spring, receiving the minus of the battery from the contact g.

The blocking of this relay is broken only when the called subscriber picks up the telephone receiver and, if there is no answer, when the VS pin is in place.

When a call arrives, the telephonist polls the caller and, if the primary subscriber is required, she performs the necessary operations in the usual order. If, however, an additional subscriber is required, not the main subscriber, the telephone operator, after inserting the call plug into the required jack, should momentarily press the L button and then make the call in the usual order.

When the button L is pressed, the circuit closes: minus, contact and button D, winding of the PD relay, contact and relay OP ,, cable QC contact, plus.

The relay is triggered and blocked by the circuit: minus, the contact of the relay XRD, the contact and the relay OP, the cord-contact of the CC, plus.

When the RD relay triggers, it switches the corresponding contact springs from the quince contacts to the whig contacts, due to which the grounded pole of the inductor (or transformer) is connected to the wire and the call goes to the subscriber who has the call to wire a.

If the D button is not pressed before making a call, i.e. the main subscriber is called, then the taxiway relay will not work, the inductor grounded pole will be connected to wire a and the call will go to the main subscriber whose call is connected to the wire .

Before the receiver is picked up by the subscriber, the OP relay will be without current, so that the PD relay will be in a locked state and it is possible to send repeated calls. As soon as the called subscriber picks up the handset, the ORZ relay will operate, and the relay circuit relay in contact with the relay OP will be broken, as a result of which it will release and the call circuit will return to normal.

If the called subscriber does not answer, the telephonist will have to remove the ring plug from the socket; putting it in its place, it breaks the cord-contact and thereby breaks the circuit of the blocked RD relay, due to which the call circuit will return to normal.

The subject matter of the invention.

The device of a cord pair of a handheld telephone station of the Central Bank system with two-wire cords and plugs (type XB X 2) with the possibility of switching on the water station jack of two subscriber devices, different in order to provide a call to the called subscriber whose device is connected to one jack with another apparatus, button D and a taxiway relay are introduced into the scheme of a corded pair, mutually switching the wires of the calling cord. JK to the Copyright Certificate of P. No. 57631 S. Mordovin