SU64849A1 - Bipolar duplex device without a balanced line - Google Patents

Description

The present invention relates to a bipolar duplex device without a balanced line in which three unpolarized telegraph relays are used. Two of these relays are included as linear and transmitting, and a third as recording. LeeHeftHioie and the registering relay control the operation of the receiving device in accordance with the bipolar current pulses coming from the line. These relays do not react to the current pulses of their transmission, sent by the iB line to the transmitting relay, controlled by the transmitting device.

The invention is illustrated in the drawing; in FIG. 1 of which a schematic diagram of the device is shown, and FIG. 2 is a duplex communication scheme on Morse devices between two stations.

The scheme of a terminal duplex device without a balanced line consists of three non-polarized relays (Fig. 1). Relay PI is transmitting. A transmitter is connected to the winding circuit of this burner, which controls its operation. The contacts of this relay are supplied with plus and minus of the linear battery LB.

The relay RZ is included in the core and minus circuit of the transmitting relay PI. The contact system of the relay P2 together with the contact system of the recording relay Rz are included in the receiver circuit.

Symmetric and asymmetric actuation of the relay P2 and RZ during the operation of the transmitter 1B1 of both stations causes the separation of the reception from the transmission.

When duplex operation of two currents, directions of sending terminal stations can be combined in the following combination:

Station A Station B

1) +. -f

2) -,

3) H -

four)-.

In the first case, both stations give a positive message to the line. At station A (Fig. 2), the current from the positive linear battery LB will flow along the created closed circuit: the front fixed key contract, the front moving key contact, the key rack, to the branch point, resistance R, the relay winding PI and the negative battery. The current in the direction of the line L1-

.JL through the winding of the relay Pr will not go, since the line at both ends is under the same potential.

In this case, the relay P is relayed (access and the relay relay P will be in the initial position. A closed circuit is formed at the station. The current will flow from the local Yatrei MB plus through the winding of the receiver I electromagnet, the contact P and the relay working contact minus. local battery.

Due to the passage of current through the winding of the electromagnet of the receiver 1, the latter will record the working package. Similar work will occur at station B. In the second case, station A sends a minus, and station B sends a plus.

The current from the plus of the linear battery of station B comes in line, enters the winding of the relay Pr, the transmitter's key-sa rack, rear movable:, qH5: key act, rear stationary key contact, minus the linear battery of station A and goes to .land.

At the same time, the switch of the relay P2 is attached, and the switch of the relay of the PI will be in the iB I1 equivalent position. A closed circuit is formed at the station / A, when the current from the plus of the local battery goes through the winding of the receiver's electromagnet, measles the idle contact of the relay Pb working contact and the pin of the relay PZ, minus the local battery. Due to the passage of current through the winding of the receiver electromagnet, the latter will record the working package. At station B, the receiver’s current circuit 2 is razlaminut 1 following the equipment of five relay P i and Pg.

In the third case, station A gives plus, and station B gives minus. The current from the plus. Of the station A battalion will go through the front fixed contact of the key, the front movable contact of the key, the key rack, 1о (control, R s and through the winding of the relay P1 1 will go to the power source of the current from the key rack through the winding of the relay P g will go to line to the neighboring station. At the same time, the corr of the relay P 1 and P 2 is attenuated and the local circuit of the electromagnet of the receiver is disconnected.

At station B, receiver 2 will work, since a current circuit appears, similar to receiver circuit 1 in the second case.

In the fourth case, the two stations give a negative message to the line. In this case, in the windings of the relay PI and RY CURRENT is absent. Their measles will be in the starting position. Local circuits will open and the receiver's electromagnets will be de-energized.

Thus, at each of these stations, reception and transmission occur simultaneously, as with a conventional duplex device with balanced lines.

Subject invention

Claims (2)

1. An arrangement of two pole of a duplex without a balanced line, differing in the use of three non-polarized telegraphs, two of which are included as linear and transmitting, and the third - as a registering one. 2. The device according to claim 1, characterized in that said linear and registering relays control the operation of the receiving telegraph apparatus, in accordance with the bipolar current pulses coming from the line, and do not react to their transmission current pulses, which are controlled by the transmitting relay transmission apparatus. L, R. MJ / I G-lla i L yy "y pfy; t - e - T j .- npieriHurf 1 15  - - l W6 Priepnik with. r / y /// V