Thermally responsive electrical switch

Details Thermally responsive electrical switch Thermally responsive electrical switch

1976-05-27

1978-03-14

Broome, Harold

Electricity: electrothermally or thermally actuated switches

Thermally actuated switches

With bimetallic element

337372, H01H 3752

Patent

active

040793486

ABSTRACT:
A thermally responsive electrical switch has a contact arrangement mounted within an open-ended chamber in an electrically insulating switch body, the body having a rim around the open chamber end and having a shoulder formed in the rim which also extends around the open chamber end. A thermally conducting cap is secured over the open end of the chamber engaging the rim of the chamber and a snap-acting thermally responsive bimetal disc has its periphery disposed between the cap and the noted shoulder for positioning the disc relative to the contact arrangement. A motion transfer pin is movable in response to snap-acting movement of the thermally-responsive disc to move the contact arrangement between open and closed circuit positions during temperature changes. The body has slots in the rim of the chamber extending through the body shoulder and a guide has a passage slidably receiving and guiding movement of the transfer pin, the guide also having peripherally extending mounting portions fitted into the body slots and secured therein by the cap for mounting and locating the guide relative to the contact arrangement.

REFERENCES:
patent: 3164701 (1965-01-01), Kirchhubel
patent: 3317693 (1967-05-01), Bolesky
patent: 3470517 (1969-09-01), Ohlemacher et al.
patent: 3768057 (1973-10-01), Sekira et al.

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