SU8054A1 - Telephone device - Google Patents

Description

The proposed device is intended to include additional telephones to the main unit in the event of an eb (too many conversations and remoteness from the central station, when wiring separate lines to each unit is impractical.

FIG. 1 shows a circuit for turning on the device of the invention; FIG. 2 shows a general view of the device itself, and FIG. 3-part relay box.

A relay for two extension telephones is connected to a subscriber's usual device so that when the hearing tube is picked up, any device directly connects to the central telephone exchange, and the other devices automatically switch off during the call.

The windings of these relays (Fig. 1) are included in the circuit of the local battery 5 through the contacts 12 on the extension arms 6 of each telephone set, isolated from the other contacts. FIG. 1, this insulation is denoted by a break in the line of the body of the lever.

Anchor 4 electromagnets (Fig. 3) have two, insulated from each other by a plate 26, rivets 25 and 27, serving as contacts.

Each phone is connected to the line through a contact formed by Core 4 of the corresponding relay and a core connected to one of the wires in the line. Calls 7 of two devices are connected between, specifically for each device, wire and earth, and in the third device a call is connected to both wires (line). If one of the subscribers, eg 3, picks up the hearing tube of his device, then the lever 6 (FIG. 1) connects to pin 12 and the current from battery 5 passes through pin 12, lever b, relay electromagnet 3, the second relay, the second relay, the first relay’s relay 4 and returns to the second pole of the battery. 3 with the central station and thus make it impossible for the devices 1 and 2 to connect with the station before the end of the call, over the device 3. If the central station wants to call the subscriber, for example, 2, then for

This telephony operator presses button I. The alternating current goes from generator 13 through wire 14 through the right side of button II, wire 15 and 16, bell 7, capacitor 8 to ground 3. The left side of the button is isolated from the right, connects another when pressed a generator pole, with earth ground, than the circuit is closed and a signal is given to the subscriber.

The subject of the patent.

The telephone device is characterized, firstly, by the use of installed subscribers, one for each subscriber, relays 1, 2, 3. According to the number of available telephone sets, the core 4 of which is equipped with an insulating plate 26 with two rivets 25, 27 (flg. 4) serving to form the contact, the windings of which relays are included in each of them

to the local battery circuit 5 through the corresponding contact 12, arranged on the lever b of each telephone device and isolated from the other contacts of the lever, and through the push contacts of the other two relays, and, secondly, by the fact that each telephone set is connected to the line through the contact formed by the core 4 of the corresponding relay and its core connected to one of the line wires, whereby two telephone sets have their calls 7 connected between a special wire for each device and ground, and in the third telephone set they have NOC is connected to both wires of the line with a view to, when calling from a telephone station originating seeing-present on both or one of them and earth, come into effect one of calls lishch 7.

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