SU29872A1 - Device to selectively call telephones - Google Patents

Description

Devices for selectively calling up telephones are already known, which are equipped to call polarized relays, serve to close the ringing device circuit and are triggered when a certain combination of positive and negative current pulses sent to one of the wires and the ground is received from the line.

The present invention consists in a particular form of implementation of such a device.

In FIG. 1 shows a device diagram; FIG. 2.-scheme of its modification; FIG. 3-circuit polarized relay.

In each of the subscribers, four polarized / -4 relays 5 are set and five buttons 6-10, of which buttons 6-9 are used to send 75 lines, 12 pulse combinations, and button 10 is for the off signal.

-The device is attached to a local battery //. If there are four relays, as in the case described, the device can serve from ten to sixteen subscribers, each of which must be assigned a well-defined combination of pulses. The circuit in FIG. 1 drawn up on the assumption that the subscriber is called by the following com (161)

bination; first of these

impulses are sent through the wire / 5 when one of the subscribers of the button 7 is pressed, the second pulse is sent through the wire 12 when the button 2 is pressed, the third through the wire 13 when the button 3 is pressed and finally the fourth through the wire 13 when the button is pressed again 2. Button 4 serves to send a negative pulse 6 to wire 12, which is necessary, for example, when calling that subscriber

to which the combination is assigned:

-} - f- or-, etc. When sending

pulse combination relay

for the subscriber whose apparatus is shown in the drawing, they will work one after the other and connect bell 5 (through their measles) to the ground; Call 5 is activated by pressing the button 1 on the caller. During a call, a part of the relay and other subscribers will activate, the chains of calls will not be closed. To reduce R, the initial position of all relays is button 10, with which current from the local battery 11 is sent to line 12, 13.

Pressing the button 10 produces the ps end of the conversation or if the called subscriber does not respond. From any point of the circuit, you can send a circular call by pressing the /, 3, 2, 4,.) /, 3, 2, 4 buttons — then all the relays of all the subscribers will work and their calls will be connected to the J3 wire and ground; after this, by pressing the / button with a button, as with the call of the subscriber, they are all activated.

The device shown in FIG. 2, (Allows splitting the line “the number of simultaneous conversations of several pairs of subscribers into sections. In this device, in addition to four polarized relays, relay 4 with an iron core and an automatic index of line occupancy are used, for example, a blender 5 , equipped with a spssnka, open: the caption “to this or” freely. In addition to the five buttons mentioned in the description of the device in Fig. 1, there are two more buttons 5 and 7, the first of which serve to send a signal. and the second to bring the call The device uses a polarized bell 5, a key 20 with sixteen K springs for separating the circuits, and an inductor 2 /, the purpose of which will be specified below.

Before starting a call, press button J6, including all automatic pointers to the battery circuit //: battery plus, button contacts /, button J6 contacts, key spring 20, wire / 2 lines, key subscribers spring 20, contacts 22, windings of automatic pointers 15, contacts, 23 of these pointers, earth, another contact of the button 16 of the caller, minus the battery //. Automatic pointers 75 open the label „Zan. Then, using buttons 6–9, dial a combi (pulse nation to call the required subscriber. When you press, for example, button b, the chains are closed: button 6, spring of key 20 and wire J3 of all polarized relays. Relay / located at the called subscriber, it will work and YOUR CORROSE will close the contact in the circuit of the next relay 2. Then press the other buttons, turn on all the other relays of the called subscriber, resulting in: call 5 in his device will be connected, VC on one side, to the / 5 wire and , from the other side, with the earth. Then, pressing

button 77, rotate the knob of the inductor 24; the inductor current flows from one side into the wire 75 and from the other side into the ground, as a result of which the call at the called subscriber rings at the beginning of the conversation. The called subscriber, having learned which side of the chain he is talking to, presses the lever of the key 20 in the appropriate direction and separates his telephone from the rest of the chain, with the entire call part being turned on.

After the end of the negotiations, the button 10 is pressed and a short rotation of the inductor sends alternating current through two wires without a ground: wire 72, capacitor, relay coil 14, contacts 28 on the relay triggered contacts, pin 2 of pointer 75, wire 75, and relay J4 attracts its measles and closes them in contact 25 of the circuit of the windings of the relay 7-4, which serve to return the Koreas to their original position.

At the same time, through the contacts 26 and 27, the busy indicator circuit closes, and the latter opens the "free" signal, and all the contacts 28 and 24 are opened, as a result of which the relay 14 is disconnected from the battery.

The proposed device can be used to service a larger number of subscribers, in which case it is necessary to increase the number of polarized relays installed in each device accordingly.

The subject matter of the invention.

Claims (2)

1. A device for selectively calling telephone sets using a call to polarized relays assigned, when a certain combination of positive and negative current pulses is received from a line, to close the ringing device circuit, which combinations of current are sent to one of the wires and to the ground, that the electoral relay coils are connected to the ground with one end and the other to one of the wires alternately, in order to enable the relay to operate sequentially one after the other only from sending a specific to current combinations so that prc operation of the first relay from the first current pulse closes the circuit of the second relay from the second current pulse, etc., to the last relay assigned to close the subscriber's calling circuit. 2. In the device of claim 1, application in the relay of the second windings assigned to transfer the Koreas of these relays to the initial position by sending a release signal. .  F tk 1 P, i HI , ze: 4h4 (M -liJ i i