Heat sensitive circuit breaker employing meltable material

Details Heat sensitive circuit breaker employing meltable material Heat sensitive circuit breaker employing meltable material

1979-06-14

1981-12-22

Harris, George

Electricity: electrothermally or thermally actuated switches

Thermally actuated switches

Plural diverse actuating means in single switch

337407, H01H 3702

Patent

active

043073700

ABSTRACT:
A heat sensitive circuit breaker for electrical apparatus, composed of an insulated member carrying electrical contacts and contact springs for producing an electric current flow path, a heat transfer plate, a thermal actuator composed of a body of meltable material, and a force-transmitting pin of electrical insulating material which is displaceably mounted in the insulated member and has one end in engagement with the body of meltable material and its other end in engagement with one of the contact springs, in which the meltable material is a solder and the actuator includes a rigid sleeve circumferentially enclosing the solder body and provided at one of its axial ends with an opening via which the solder body is in direct contact with the heat transfer plate, and at the other of its axial ends with an opening through which the pin extends to engage the solder body.

REFERENCES:
patent: 2909631 (1959-10-01), Stamm et al.
patent: 3291945 (1966-12-01), Merrill et al.
patent: 3624578 (1971-11-01), Stocker
patent: 3845440 (1974-10-01), Hunter
patent: 4020442 (1977-04-01), Ito et al.
patent: 4145654 (1979-03-01), Grimm

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