SU26133A1 - Device for wire radio house - Google Patents

Description

Patent No. 15235 describes a device for wire house radioification, in which a relay is used to turn on and turn off a power amplifier; it is controlled from a central amplifying station by sending a direct current through the same wires that bring a sound frequency to a house amplifier. for this, an artificial circuit formed by the midpoints of the linear windings of the transformers is ground.

In the proposed device, which represents the form of implementation of the device described in patent No. 15235, one of the line wires is also intended for sending DC currents to a relay that turns the amplifier on and off, and the other wire is used to transmit pulses of the primary electric clock, acting on a relay that sends similar current pulses to a local battery in an artificial circuit between the midpoint of the output amplifier and ground.,

The device, whose circuit is shown in the drawing, receives audio current currents from the local radio center or from the radio receiver, which are amplified by amplifier Y, through wires TU, and after the output transformer G are sent to the substations via overhead lines or cable lines. At the substation there is an amplifier U with a rectifying device, powered by a lighting network, the current of which is supplied to terminals K. After the output transformer T, the amplified current is fed into the local distribution network and feeds the reproducers P in the apartments. The middle point of the secondary winding of the transformer G, through a system of capacitors C and chokes D is connected to ground. The transformer primary winding T is connected to ground in the same way. When battery i closes the key B, it activates the relay Rl, which turns on and off the power supply circuit of the amplifier U. The impulses of the primary electric clock through the EC. transmitted to the differential relay DR with battery 2. which is driven to the midpoint of the output winding of the transformer T; and acts on the differential relay with battery z. The secondary electric clock Vj is connected to the line supplying the loudspeakers between the middle points of the jet coils D, - and the ground.

When the amplifier U is turned on, the contact fi, the current from the battery, is simultaneously closed; through one of the wires of the line begins to pass to the substation and there, acting on the relay Rl, closes the current of the lighting network and conducts the amplifier Ua. Differential relay DR, received through the wires of the EU

the pulses from the central electric clock, in turn, send the corresponding pulses from the battery Bg through the second wire 2 lines to the substation, where a differential relay therefore operates, which sends the pulses of battery B to the local distribution network through the midpoint of the output winding of the transformer TS.

The subject matter of the invention.

The form of the device, described in paragraph 1 of patent No. 15235, is one of the wires

the line supplying the sound frequency from the central station to the home amplifier is designed to send a direct current acting on the relay, turning the amplifier on and off, and another wire is used to transmit the impulses of the primary electric clock acting on the relay, sending similar current pulses local battery in an artificial circuit between the midpoint of the output winding of the amplifier and the ground, with the secondary electric clock connected to the line feeding the loudspeakers, between the middle points of the reactive coils and ground.

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