Direct current proximity detector having switching means which p

Details Direct current proximity detector having switching means which p Direct current proximity detector having switching means which p

1976-02-25

1977-11-01

Corcoran, Robert J.

Electricity: measuring and testing

Magnetic

With means to create magnetic field to test material

331 65, G01R 3312

Patent

active

040567699

ABSTRACT:
A direct current proximity detector having a first terminal directly connected, to a terminal of a supply source and second and third terminals connected to the other terminal of the supply source through a load, an oscillator associated with a detector of its state of oscillation, a voltage stabilizer and a static switching device. The switching device comprises first and second transistors, the conducting state of the respective transistors depending upon the state of a corresponding output of an inverter unit which is controlled by the detector. The two transistors are connected to the first terminal through a Zener diode, second and third terminals being interconnected by means of two serially connected diodes of opposed polarities the common point of which supplies the voltage stabilizer.

REFERENCES:
patent: 3147408 (1964-09-01), Yamamoto et al.
patent: 3521184 (1970-07-01), Bowker

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