Fail-safe electronic polarized relay

Details Fail-safe electronic polarized relay Fail-safe electronic polarized relay

1976-08-02

1977-11-01

Zazworsky, John

Electrical transmission or interconnection systems

Personnel safety or limit control features

Interlock

307236, 307363, H03K 518

Patent

active

040567397

ABSTRACT:
A fail-safe symmetrical solid-state polarized relay circuit having a positive and a negative level detector coupled to a source of periodic input signals. A pair of amplifiers for amplifying the a.c. oscillations produced by the level detectors. A plurality of rectifiers for rectifying the a.c. oscillations and for alternately producing a d.c. output voltage on a pair of output terminals in accordance with the positive and negative excursions of the periodic input signals.

REFERENCES:
patent: 3041475 (1962-06-01), Fisher, Jr.
patent: 3431435 (1969-03-01), Bizet

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