SU61302A1 - Next device - Google Patents

Description

This proposal is a modification of a bridge-type tracking device, auth. | over. No. 59433, in which exact and coarse adjustments are applied. This device allows you to use as a precision system a conventional bridge with a polarized relay in its diagonal.

FIG. 1 and 2 depict diagrams of two variants of the device.

In the first embodiment (FNG. 1), fine adjustment is made according to the principle of the Wheatstone bridge, and coarse adjustment is a rheostat circuit.

The coarse adjustment is carried out using a circuit made in the form of two rows of contact plates Ki and Kz of different lengths connected to each other through resistances (for example, incandescent lamps). The entire device is divided into I and II systems, differing by 180 electrical degrees (assuming a complete bypass of the system with precise adjustment for 360 electrical degrees).

The breakdown of the fine adjustment system is carried out using two brushes / and //; when the fine adjustment system is running, only one brush is turned on. The selection of a brush is made by a series of auxiliary relays / and //, from which the relay is triggered, in the circuit of which the plug C / Ci is connected.

The principle of operation of the rheostat system is as follows. The resistance of this system is large compared to the total resistance of the shoulders of the bridge of the exact system, as a result, when the brushes of the coarse adjustment system approach the point where the pinch switches on, there is a slight decrease in voltage on the TI or TZ transformer connected to the resistance ends transformer stroke). However, when the brush touches the plug-in contact with the plug, the voltage in the coarse adjustment system circuit immediately drops to zero, with the full voltage applied to the fine adjustment system bridge.

No. 61302- -.

When the coarse adjustment system is in operation, the trassformer Tu of the bridge index indicator / receives the voltage from the corresponding transformer T and TC of the coarse system, and after switching to the exact system, from the diagonal of the bridge.

The matching zone of the exact system is the middle half of the bridge, the outer quarters are for control. Therefore, the plug sockets of the driver part of the bridge are only in its middle half.

The presence of short spaced contacts / (2 between the main / Ci and resistances is caused by the need to apply voltage to the fine adjustment system after passing the brush through the neutral between the main contacts, therefore, after passing the fine adjustment brush through the bypass.

It is advisable to apply for a coarse resistance adjustment system, depending on the voltage, for example, an incandescent lamp, as shown in FIG. one.

Options are also possible with a breakdown not into two systems with a phase shift of 180 electrical degrees, but into three systems with a shift of 120 electrical degrees, into four systems with a shift of 90 electrical degrees, etc. In the latter cases it is advisable to use the following shoulders of the fine adjustment system, made according to a closed circuit in the form of a circle; The stress is included in a part of the circle. With such a solution, there is no need for intermediate contacts of the coarse adjustment system, since the polarity does not change during the bypass.

The second option (Fig. 2) differs from the first in that the coarse adjustment system instead of the rheostat is made of a bridge; This provides a small number of communication lines.

The transition from coarse to fine adjustment is carried out by thyratrons, the grids of which are controlled from the coarse adjustment bridge through the transformer Gg. While there is a mismatch on this bridge, the thyratrons are hot and short the bridge of the adjustment through the transformer T. When a coarse adjustment is reached on the bridge, the thyratrons go out, the voltage on the exact bridge increases, and it comes into control.

The selection of the brush / or // system of fine adjustment is carried out with the help of the relay PI or Rg. The choice is based on the fact that the brush to be operated at the moment of voltage supply is located at the point of detour through the segment assigned to it turns on the corresponding relay.

In order for the thyratrons to go out, a constant negative bias is applied, as usual, to their grids (not shown in the diagram).

Subject invention

Claims (3)

1. Change of follower device according to the author. St. L9 59433, characterized in that the primary windings of transformers are adventitious to the extreme plates of a coarse adjustment system, made in the form of two rows of contact plates of different length, connected to each other through resistances (for example, incandescent lamps). 2. A device modification according to claim 1, characterized by the use of only one transformer, the primary winding of which is connected between the sliders of the potentiometers, which form a bridge circuit for the master and follower thyratron systems of coarse tuning. 3. In the device according to claims. 1 and 2 turn on the zero relay through an intermediate transformer. Having passed pmchi