Electricity: electrothermally or thermally actuated switches – Electrothermally actuated switches – With bimetallic elements
Patent
1990-12-19
1992-03-31
Broome, Harold
Electricity: electrothermally or thermally actuated switches
Electrothermally actuated switches
With bimetallic elements
337 85, 335 23, H01H 7116, H01H 6104, H01H 7348
Patent
active
051011867
ABSTRACT:
An improved low-cost circuit breaker mechanism is provided which dispenses with the complicated and costly conventional use of latch mechanisms for realizing the tripping action. The circuit breaker mechanism essentially comprises an input electrical terminal having an associated contact where current is received, an output electrical terminal where current is delivered out of the breaker, and a conductive deformable section cantilever blade formed of thermostat metal and adapted to establish a conductive current path between the input contact and the output terminal. The cantilever blade is disposed in a normally closed position with a first end affixed to the output terminal and a second free end contacting the input contact, and is adapted to deflect from its normal closed position to an open position for interrupting current flow when the temperature of the cantilever blade increases as a result of the monitored current exceeding a threshold value. The circuit breaker mechanism is provided with means for exerting a mechanical force for stimulating the cantilever blade, after it has been deflected by an over-current condition, back to its normal closed position. A remote control arrangement is also provided which permits remote activation of the circuit breaker mechanism by effectuating the force required to effectively deflect the cantilever blade by exertion of appropriate electromagnetic fields on an armature element linked to the blade.
REFERENCES:
patent: 2689285 (1954-09-01), Drobney et al.
Broome Harold
Golden Larry I.
Jimenez Jose W.
Square D Company
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