Normally open, thermal sensitive electrical switching device

Details Normally open, thermal sensitive electrical switching device Normally open, thermal sensitive electrical switching device

1977-05-31

1979-07-10

Broome, Harold

Electricity: electrothermally or thermally actuated switches

Thermally actuated switches

With fusible, combustible or explosive material

337401, H01H 3776

Patent

active

041609689

ABSTRACT:
A temperature sensitive normally open electrical switching device has a pair of normally isolated, current carrying leads. A casing defines a central cavity and encloses first and second electrodes which are electrically connected to separate ones of the leads. An electrically conductive, fusible pellet is positioned in the cavity and melts at a predetermined temperature to form an electrically conductive path between the electrodes, regardless of the orientation of the device. The first electrode is concave and the second electrode extends into the concavity formed by the first electrode.

REFERENCES:
patent: 2709210 (1955-05-01), Newhall, Jr.
patent: 4009422 (1977-02-01), Woodfill

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