SU20158A1 - Combined telephone and wireless device - Google Patents

Description

The subject of the present invention is a combined telephone and radio telegraph apparatus. With an atom, in the first case, it is possible to work both on a single-wire and a two-wire system. Radio operation only requires an antenna and a ground connection. The transition from radio to radio transmission is achieved by one movement of the switch.

., One of the main parts of the apparatus, According to the diagram in the drawing,. is an induction coil 1 with three windings a, b, c, simultaneously serving as a microphone induction coil (windings a and b), a radio transmitter booster transformer (winding a and c) and a buzzer (winding b). The bipolar switch 2 serves as the switch to the radio broadcast. The Y contacts serve for wire telephony and radio reception, and the X X contacts for the radio broadcast. The battery 3 feeds the microphone 4 and is at the same time the source of energy for the spark gap 5. To tune the radio receiver, a coil 6 of variable self-induction serves.

Pr ov about l ochna communication. Switch 2 is located on contacts Y. Clamps and 3 are connected with a line (in the case of a two-wire system) or one with a line, the other 3JIi with the ground (with a single-wire connection).

Call. When you press button 7, the circuit closes: plus battery 3, buzzer contact, middle contact of button 7, winding and induction coil 1, minus battery 3. In winding 6 an alternating current is induced which goes into the line.

Conversation. Microphone circuit: plus batteries 3, microphone 4, winding and induction coil 1, minus batteries 3. Telephone circuit: clip ZL, telephone 8, winding b of the induction coil 1, clip L2.

Wireless communication. The antenna is attached to terminal A, ground 5.5 / 7i.

Reception Switch 2 is located on the contacts of the U. A simple detector circuit is formed with parallel switching on the self-induction coil 6 on one side and successively the telephone 8 and detector 9 on the other side. This scheme makes it possible to receive telephone and fading telegraphs. signals.

Broadcast. Switch 2 is located at contacts X X. When simultaneously pressing button 7 in the primary circuit of the induction coil 1 and button 10 in the high voltage circuit, through the discharge gap 5, a series of sparks are excited, causing damped oscillations in the antenna circuit. The operation of button 7 as a key can transmit telegraphic SI1 | Nala.

The subject of the patent.

A combined telephone and wireless device, characterized by the use of an induction coil with three windings, each coil is used simultaneously as an induction microphone coil, a tailor and a high voltage transformer to work on the wireless telegraph on the spark gap.