Thermally actuated latch for electrical circuits

Details Thermally actuated latch for electrical circuits Thermally actuated latch for electrical circuits

1987-04-17

1988-05-24

Broome, H.

Electricity: electrothermally or thermally actuated switches

Thermally actuated switches

With fusible, combustible or explosive material

337404, H01H 3776

Patent

active

047468920

ABSTRACT:
A thermally actuated latch for electrical circuits is permanently operative for completing an electrical circuit upon exposure to a predetermined elevated temperature. The latch includes a fixed contact, a movable contact arm which is biased toward the fixed contact, a movable contact on the movable contact arm, and a deformable pellet. The deformable pellet communicates with the movable contact arm through a communicator disc to normally maintain the movable contact in spaced relation with the fixed contact. The pellet is deformable to a disposition of reduced profile upon exposure to a predetermined elevated temperature to allow the movable contact to be resiliently moved into engagement with the fixed contact in order to complete an electrical circuit connected to the latch.

REFERENCES:
patent: 1181705 (1916-05-01), Weber
patent: 3201549 (1965-08-01), Lowe
patent: 3602864 (1971-08-01), Burney
patent: 4472705 (1984-09-01), Carlson

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