Thermal switch

Details Thermal switch Thermal switch

1977-05-23

1978-11-28

Broome, Harold

Electricity: electrothermally or thermally actuated switches

Thermally actuated switches

With fusible, combustible or explosive material

337409, H01H 3776

Patent

active

041278399

ABSTRACT:
Conductive caps are respectively put on both ends of an insulating cylindrical member and a pair of cup-shaped contactors are disposed in the insulating cylindrical member in a manner to be movable relative to each other. A repulsive force is provided by a pair of biasing elements located between the pair of cup-shaped contactors through a fusible member to electrically interconnect the conductive caps. When the fusible member is fused at a predetermined temperature, the biasing force of one of the biasing elements weakens and the biasing force of the other biasing element increases to move the pair of cup-shaped contactors toward each other, thereby to electrically disconnect the conductive caps from each other.

REFERENCES:
patent: 3727164 (1973-04-01), Cartier et al.
patent: 3924218 (1975-12-01), Plasko
patent: 4068204 (1978-01-01), Iwanari et al.

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