Electricity: electrothermally or thermally actuated switches – Electrothermally actuated switches – With longitudinally expansible solid element
Patent
1976-10-26
1979-05-08
Gilden, Leon
Electricity: electrothermally or thermally actuated switches
Electrothermally actuated switches
With longitudinally expansible solid element
29421R, 29630C, 733783, 337111, 337379, 428555, B21D 5300, H01R 900
Patent
active
041529987
ABSTRACT:
A method of forming a snap-acting thermally responsive bimetallic actuator comprising forming, from sheet bimetal, a member having an aperture with an arcuate outer perimeter and an inner perimeter defining a tongue free at one end, said free end being close to the outer perimeter, the outer and inner perimeters smoothly merging at rounded ends of the aperture adjacent the tongue root, and the radial width of the member at the tongue root being substantially greater than the width opposite the free end of the tongue. The formed member is thereafter pressed between a die shaped to a domed configuration and an incompressible rubber pad to impart a domed configuration to the member.
REFERENCES:
patent: 194911 (1877-09-01), Hoeltge
patent: 562309 (1896-06-01), Leavenworth
patent: 576593 (1897-02-01), Lowry
patent: 1988345 (1935-01-01), Vaughn
patent: 3196233 (1965-07-01), Burch et al.
patent: 3221126 (1965-11-01), Moro
patent: 3234346 (1966-02-01), Taylor
patent: 3943625 (1976-03-01), Brenan
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