Switching device

Details Switching device Switching device

1976-04-08

1977-06-21

Envall, Jr., R. N.

Electricity: electrical systems and devices

Control circuits for electromagnetic devices

For relays or solenoids

323 34, 361159, 361205, H01H 4732

Patent

active

040314359

ABSTRACT:
A switching device for the indirect activation and/or termination of systems operatively coupled to the switching device which includes an inductor adapted to be periodically pulse energized, an armature movably mounted with respect to said inductor so as to assume a first and a second position relative to the inductor thereby causing a distinct variation of current flow in the inductor when energized by a periodically applied pulse, a manipulative armature positioning means and an associated electrical circuit responsive to current flowing in said inductor. The members are arranged such that the circuit is adapted to selectively indirectly actuate an external system only when said armature assumes one of said positions and a periodic energizing pulse has reached the inductor.

REFERENCES:
patent: 2837711 (1958-06-01), Lewis
patent: 3763381 (1973-10-01), Cromwell et al.
patent: 3947751 (1976-03-01), Bray

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