SU394953A1 - TELEPHONE APPARATUS - Google Patents

Description

one

The invention relates to telephony and can be used in telephone animations.

Known telephone sets containing pulsed and shunting contacts dialer, contacts of the lever switch and line terminals.

However, when using known devices, it is necessary to remove the handset during dialing.

In order to ensure station occupation and dialing without removing the microtelephone of the handset, in the proposed device, parallel contacts between the pulse contacts and the lever switches contacts include additional contacts and a time relay connected via dialer shunt contacts.

The drawing shows a diagram of the proposed device.

In the initial state, the capacitor 1 is charged to the magnitude of the voltage of the central battery supplied to the line terminals 2 and 3. Transistors 4 and 5 are disconnected from the line. At the factory of the dialer by switching the additional contact 6, the station is occupied, the capacitor V is discharged through diodes 7 and S. Shunt end 2

Step 9 closes, causing the 4 N 5 transistors to be connected to the line.

During the reverse course of the dial of the dialer, the line receives pulses corresponding to the transmitted digit number of the subscriber. After the additional contact 6 returns to its initial state, the capacitor begins to charge / through the resistor 10, which leads to the opening of the P1u transistors 4 and 5, which form a circuit for holding the station for inter-serial time: terminal 2 - pulse contact // - shunt contact 9 - relay 12 - transistor 5 - diode 13 - terminal L.

After opening the transistors - / n 5, the relay 12 trips. The shunt contact 9 of the dialer, which is still in the closed state, is blocked by the contacts / 2i, and turns on the amplifier 14 of the contacts. The hold time is governed by the selection of the resistor 10 and the capacitor Y. The busy and call signals of the subscriber are amplified by the receive amplifier 14 and transmitted by the loudspeaker 15.

Subject and purpose of

A telephone set containing pulsed, auxiliary and shunting pulses of the dialer and line terminals, characterized in that, in order to ensure the occupation of the station and dialing without removing the handset, and parallel to the linear terminals between the pulse contacts and

The contacts of the lever switch include additional contacts and a time relay, and connected via the shunt contacts of the dialer.

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