Safety device with thermal and electromagnetic release for a mul

Details Safety device with thermal and electromagnetic release for a mul Safety device with thermal and electromagnetic release for a mul

1975-02-12

1976-02-03

Broome, Harold

Electricity: magnetically operated switches, magnets, and electr

Electromagnetically actuated switches

Automatic circuit-interrupting devices

335 35, 335 44, 335168, H01H 7348

Patent

active

039367800

ABSTRACT:
This device comprises means for detecting, respectively, overcharges, by means of bimetallic strips and short-circuiting, by means of mobile magnetic plates effecting independently from each other the controlling of the switching off of a circuit-breaker for the protection of a circuit. The thermal safety means operate through a mechanical power amplifier comprising a cage with uprights, a rotating catch dependent on the thermal phase-detectors and a plunger transmitting the power of a spring to effect the switching off.

REFERENCES:
patent: 2288270 (1942-06-01), Dorfman et al.
patent: 2412294 (1946-12-01), Scott, Jr.
patent: 3457531 (1969-07-01), Goodwin, Jr.

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