Thermal cut-off device

Details Thermal cut-off device Thermal cut-off device

1983-11-08

1985-07-02

Broome, Harold

Electricity: electrothermally or thermally actuated switches

Thermally actuated switches

With fusible, combustible or explosive material

337403, H01H 3776

Patent

active

045271445

ABSTRACT:
A thermal cut-off device comprises a casing and a cover therefor both made of a highly heat conductive electrically insulating material such as ceramic. A pair of lead wires protrude from opposite ends of the casings with the other ends of the wires being electrically connected to an electrical assembly within the casing. The electrical assembly comprises a leaf spring, a conductive fixed terminal and a plastic mass for biasing the leaf spring so as to contact the fixed terminal during closed circuit condition. A helical spring in the casing stabilizes the leaf spring upon its release when the plastic mass melts due to overheating.

REFERENCES:
patent: 4186366 (1980-01-01), McVey
patent: 4255736 (1981-03-01), Kelley et al.

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