Electricity: magnetically operated switches – magnets – and electr – Permanent magnet-actuated switches – Thermomagnetic
Patent
1982-05-10
1984-06-12
Broome, Harold
Electricity: magnetically operated switches, magnets, and electr
Permanent magnet-actuated switches
Thermomagnetic
335146, H01H 5100
Patent
active
044544910
ABSTRACT:
A circuit breaker or switch utilizes the Curie point temperature characteristics of an amorphous ferromagnetic metal in cooperation with a magnet to make or interrupt an electrical circuit upon the amorphous material being heated to its Curie point temperature. The circuit breaker has a planar base member with a raised projection which supports a stationary contact member so that the movable contact member overhangs the stationary contact member. The movable contact member is provided with a number of layers of amorphous ferromagnetic material, disposed adjacent the stationary contact, bringing the movable contact member into electrical contact with the stationary contact member. Upon reaching its Curie point temperature, the amorphous ferromagnetic material will become paramagnetic or nonmagnetic material, so that the inherent resiliency of the movable contact material causes the electrical circuit to be made or broken.
REFERENCES:
patent: 2718569 (1955-09-01), Johnston
patent: 3292124 (1966-12-01), Legvold
patent: 3760310 (1973-09-01), Carson
patent: 4383231 (1983-05-01), Yamanaka et al.
patent: 4414519 (1983-11-01), Anderson
Allied Corporation
Broome Harold
DeClercq James P.
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