Armature position sensor for a relay

Details Armature position sensor for a relay Armature position sensor for a relay

1994-04-26

1996-01-09

Donovan, Lincoln

Electricity: magnetically operated switches, magnets, and electr

Permanent magnet-actuated switches

H01H 900

Patent

active

054832144

ABSTRACT:
A sensor for use with high-power solenoid-actuated relays, and for detecting and signalling relay armature position and hence the actuation state of the relay. The sensor is external to a sealed chamber in which the relay contacts and armature system are positioned, and includes a permanent magnet, the flux path of which includes the relay armature and base. Armature movement to close the relay alters the flux path to operate a reed switch adjacent the magnet, and the condition of the reed switch signals the unactuated or actuated state of the relay.

REFERENCES:
patent: 3205323 (1965-09-01), Deshautreaux, Jr.
patent: 3218506 (1965-11-01), Williams et al.
patent: 3302588 (1967-02-01), Bennett
patent: 3560846 (1971-02-01), Bessko
patent: 3579159 (1971-05-01), Posey
patent: 3770919 (1973-11-01), Lewis
patent: 5128641 (1992-07-01), Posey

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