SU6845A1 - Device for transmitting and receiving by wireless - Google Patents

Description

In the proposed device shown in the diagrams (Figs. 1, 2, and 3), waves of one length are transmitted and received by radio telegraphy for transmitting points and another wave for transmitting dashes.

At the sending station, when sending, they work with the key K, closing the first circuit in the first position, and the second circuit in the second position. Immediately after the key is touched to the spring contacts 1 or 2, fixed in the fiberboard (Fig. 1), when the key is in the Ij position or, the pp plate connected to the key with the rod ai closes the If-Jc or Aafes contacts with the current from an additional battery B will go through an electromagnet M. The last thing there is is no measles J, which will open through the contacts gk of the closed key circuit. By properly adjusting, you can reduce the running time of one EAT of another circuit after each press of the key to the COTO fraction of a second or even less. When the key moves back (to the rest position), the pp plate will open the contacts fci, fci (or a C), the electromagnet F will no longer work and the measles will be pulled in by a spring /

in the same position. In the diagram of FIG. Figure 1 depicts the case of such work with a key with a low-power transmitter, but the same principle can also be applied when high-power transmitters operate in a more complex circuit. Both circuits Gi and Sz are tuned to different frequencies "1 and I2 For receiving at the receiving station, you should also use two circuits tuned respectively to frequencies" 1 n "2J In this case, each circuit has, instead of a telephone, a two-volt 0.25 watt light bulb connected through a transformer . In the diagram of FIG. Figure 2 shows one of the two circuits, which is a four-lamp amplifier with one high-frequency gain stage, one detection lamp and two low-frequency gain steps. In the first position of the switch, the circuit will work as an ordinary receiver with an amplifier on the telephone. In the second position, the circuit will operate on the light bulb L.

The candles of the lamps from the first and second circuits are individually imprinted on the ribbon from photographic paper in the form of points arranged in two rows, respectively, in two contours.

When a telegraph operator must send a point, he brings the key to the first position (Fig. 1) and starts up the first contour of the transmitter (duration — part one hundredth of a second). During this time, the first circuit of the receiver will work, with a light bulb marking a point on the tape in the first row. In order to transmit the dash, the telegraph operator leads the key to the second position. This will cause the work of the sending second circuit, and consequently, the receiving second circuit with its lamp. As a result, the tape will have a point in the second row (corresponding to a dash).

FIG. 3 schematically shows the course of the rays from each light bulb. Bulbs LI and L.2 are placed in the pipe, between the concave mirror M or M2 and the two-convex glass E or B. The transmitted rays fall on the mirrors W and Shz inclined at an angle of 45 ° to the axis of the pipe. The rays reflected from the mirrors pass through the slits of the tube and the slits covering the tape of screen D and fall onto two photographic strips a and a pasted on a wide paper tape of 1 h; the tape covering screen E (in Fig. 3 its intersection with the plane of the drawing is indicated) has a height of several cm. The tape moves in the direction perpendicular to the plane of the drawing, winding from one drum and winding on another drum (they are not shown in the drawing). The whole system is placed in a box closed on all sides (it is not shown in the drawing).

Since the rays nadadat pas strips "1 and oz, converging almost at one point, then for blackening of silver bromide in this place a sufficient duration, representing a fraction of a hundredth of a second.

The subject of p-atenta.

A device for transmitting and receiving by wireless telegraphy, using waves of one length — for transmitting points and waves of another length — for transmitting a dash, which is characterized by the joint use of:

a) at the transfer station - a telegraph key K with a pp plate fastened to it, adjusted so that after a very short time, about a hundredth of a second after being closed with key K of one of the contacts 1, 2, each included in the anode circuit of one of the cathode generators Cj, GZ, nplinka pp closed the contacts fc, Jc or Jc, k, included in the relay circuit M, the measles of which is intended to open the contacts anc circuit of the generators (7, C (fig. 1) when the relay magnetizes)

b) on. the receiving station in each of the two receivers, each tuned to one of the waves of the departure station, is an incandescent lamp L connected with a transformer to the output circuit of the receiver, the light of which of the two receivers using lenses and a mirror system is directed so as to act on the photosensitive continuously moving tape 2 (Fig. 2, 3). .

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