Snap action devices and methods and apparatus for making same

Details Snap action devices and methods and apparatus for making same Snap action devices and methods and apparatus for making same

1987-09-15

1989-01-10

Echols, P. W.

Metal working

Method of mechanical manufacture

Electrical device making

29756, 29446, 29450, 337379, 2281736, H01H 1100, H01H 6500

Patent

active

047963557

ABSTRACT:
An inherently mechanically bistable self-supporting blade element for actuating snap-action switches, circuit breakers and devices, and methods and apparatus for producing such elements. The elements are formed from initially flat, unstressed spring material, and comprise two outer legs and a bridging portion integrally connecting them. By progressive coplanar relative displacement of the outer legs the bridging portion is deflected normally to the nominal plane of the element. Detection of this deflection enables attachment together of the outer legs to form a calibrated, inherently bistable blade element.

REFERENCES:
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patent: 2777032 (1957-01-01), Burch
patent: 3192346 (1965-06-01), Slonneger
patent: 3275773 (1966-09-01), Grover
patent: 3872417 (1975-03-01), Hufschmid
patent: 4145587 (1979-03-01), Purssell
patent: 4250367 (1981-02-01), Rossi
patent: 4669182 (1987-06-01), Ferroni et al.
patent: 4727644 (1986-03-01), Corfield

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