SU1240A1 - Device to selectively call telephones - Google Patents

Description

The proposed device represents a change in the ringing telephone set of the Dean system in order to simplify the devices of this system themselves, and each device is provided with a locking device to keep the conversation secret.

FIG. 1 shows a diagram of a group telephone set, where 1 - means a polarized electromagnet, a 2-arm core, a 5-gon, 4-bell, 5 - a capacitor, 6 - an inductive coil, a 7-microphone, an 8-pillar, modulating the core 2, , 9-pin springs, iO-lever for a handset with three springs, I-metal arc with insulation in two sections and a 12-capacitor connected to screw clips, and FIG. 2 shows a diagram of a switch band to a telephone set, with the 1 2i –2 calling buttons, 9, ii, 16, 17, 23, 24 and 26 plates attached to the line wires, 6 and 7 plates attached to the telephone circuit. to converter 8 and 12 - plates connected to automatic buttons AK, plates 10-20, 14-18 and 22 are mutually connected, 13 is connected to the minus of the battery, 27 and 25 to the plus of the battery, 10 to the ground, 21 - to the call valve, and the call valve is connected to the battery plus nk 21 of the second button plate. The central station should have: a Dina converter with a battery for calling subscribers and the station.

With a two-wire line, you can turn on no more than eight telephone sets: of these, 2 are sixteen periods, 2 are thirty-three, 2-fifty, 2- sixty-six periods, and no more than four devices of different periods per single-wire line.

The group telephone set is equipped with a blocking device consisting of a polarized electromagnet /, with a core 2 and a square 3 located between the plug for the microphone and the core 2. In the quiescent state, they are pulled to the electromagnet /, so that contacts 18 and 19 will be open and the phone is turned off the line.

The station is called by the subscriber by lifting the handset from the lever, while the lever 10, which is attracted by the spring, passes through

metal arc from the top plot, | covered with insulation, on the bottom, too | covered with insulation, and at the time of passing through the arc without insulation, it closes the battery circuit at the station, the current passing from the (-J-) battery through the calling coil 4, then through the springs 2, 20, 10 to 11 goes in line with the L-in lever, in an arc — into the ground and towards the (-) battery.

To call the subscriber by the station, the telephonist turns on the automatic button of the corresponding period and presses button 2, the transformed current of the corresponding frequency j coming from the converter to the switch band, springs 8 or 12 of the first button, depending on which wire the call is directed to, and through the spring 9 or I enters the line wire, into the apparatus, the bell and through the ground returns to the converter. |

When the station receives a signal; on the call coil, indicating; that the telephone handset is off, the telephone operator presses button 2, as a result of which a current is sent to the line from the same battery that passes through the coils of the polarized i-magnet 1, demagnetizes it, measles 2, pulled off by the spring, closes the springs 18 and 19 blocking adapts; and includes a telephone circuit.

To turn off the telephone circuit, the telephone operator presses button 5, thereby sending current to the direction.

amplifying the magnetization of the electromagnet, as a result of which the measles are attracted, disconnects the springs 18 and 19 and interrupts the telephone network.

Thus, the switching on and off of subscribers depends on the central station, which ensures the secrecy of the negotiations.

SUBJECT OF THE PATENT.

A device for selective calling telephones in the Dean system, characterized by cumulative use: a) a polarized electromagnet 1 with a crust 2 and a gon 3 located between the korore 2 and the subscriber’s microphone plug, which measles is in a position resting on the polarized electromagnet what, the telephone circuit is open at pins 18, 19 (Fig. 1); b) a station switch, equipped with buttons 2 and 3, of which button 2 is intended to send a current in a line from the station battery B in which direction electromagnet 1 is demagnetized, which leads to the closure of contacts 18 and 19, and the connection of the subscriber’s telephone circuit, The button 3 is intended to send (from the station battery 13) a current in such a direction that the electromagnet 1 polarizes, the measles 2 are attracted and the contacts 8, 19 are opened (Figs. 1 and 2).