SU472A1 - Device for finding the generating points of the contact detector - Google Patents

Description

The proposed device aims to quickly find the generating points of the contact detector.

The drawing shows a diagram of a device consisting of: a pBG circuit composed of a rheostat p, a battery B, and a contact detector G; the first oscillating circuit AoQ, tuned to the acoustic frequency; the second working oscillating circuit /.j Q, tuned to a high frequency; switch to., equipped with a idle contact. In order to quickly find the generating points, they are searched for, at first receiving low frequency oscillations (audible), and after these oscillations in circuit /.Q occur, which is detected by the telephone, circuit 1 Z-jQ is turned off with switch D, and circuit Zj is connected From high frequency (working circuit), in which high-frequency oscillations occur. The switch / C must necessarily have an idle contact in the middle; otherwise, after switching, the oscillations may cease.

To be sure that high

frequencies after such a switch, it is necessary, according to the author's report, to at least approximately observe, as experience has shown, the following conditions:

C, A,

R-, R,

/ -2

WITH,

where R. and R are the watt resistances of these circuits.

This method is convenient, in the author's opinion, also in that it allows one to judge in some respects about the health of the circuit, as well as to know that, after switching, the high frequency oscillations have arisen. In case of high tuning of the high-frequency circuit LI Q

Ci L, the relation -, j is fulfilled, pret-2 g is supposed to make the coil Zj as

variometer on a common axis with a variable capacitor C ,; then, by rotating only one handle, both capacitance and self-induction will change immediately.

SUBJECT OF INVENTION.

1. A device for finding the generating points of a contact detector, characterized by the cumulative use of: a) a contour .cocracy of a rheostat /, battery / and contact detector G; b) two oscillatory circuits: one tuned to the acoustic frequency, and the other - working - / - iQ tuned to a high frequency, the resistance of the second loop being less than the resistance of the primary circuit, and their capacitances and self-inductions are proportional; c) a switch / C equipped with an idle contact, and with the help of this switch to the circuit composed of a battery, a rheostat and a detector, the circuit CjZ., then the circuit Cj /.,. 2. The form of the device described in paragraph 1, characterized in that the self-induction coil Zj has the form of a variometer, the axis of which is at the same time the axis of the variable capacitor Q, in order to automatically maintain the proportionality of capacitances and self-inductions of both Z-iQ circuits and L C when changing L and Q.

H patent O.V. LOSEVA).