Snap type thermally responsive switch device

Details Snap type thermally responsive switch device Snap type thermally responsive switch device

1983-11-09

1985-05-14

Broome, Harold

Electricity: electrothermally or thermally actuated switches

Electrothermally actuated switches

With bimetallic elements

337343, 337372, H01H 6100, H01H 3704

Patent

active

045175411

ABSTRACT:
A thermally responsive switch device includes; a bimetallic plate enclosed within a metallic enclosure in a cantilever manner and having a central dish-shaped portion for snap movement. The bimetallic plate carries a movable contact at one free end to be in making contact relationship with a fixed contact which is placed into the enclosure. A calibrator projection is provided with the enclosure to engage with the dish-shaped portion to exert point pressure between the contacts. A reinforcer extension is disposed in the enclosure and has one end secured to the inner side of the enclosure and its other end sandwiching the dish-shaped portion in cooperation with the projection so as to prevent the cantilever support end of the plate from being deformed irrespective of often repeated snap actions of the plate in response to the ambient temperature or the like.

REFERENCES:
patent: 3546652 (1970-12-01), Allen et al.
patent: 3577111 (1971-05-01), Nardulli

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