Electricity: circuit makers and breakers – Fluid pressure – Diaphragm
Patent
1984-07-20
1986-04-08
Tolin, G. P.
Electricity: circuit makers and breakers
Fluid pressure
Diaphragm
2003021, 337343, H01H 3534
Patent
active
045815097
ABSTRACT:
A thermal or pressure responsive switch has a base mounting a set of electrical contacts. A metallic snap acting disc support, placed on the base is provided with a bore which receives a pin to transfer motion from a disc mounted on the support to the set of electrical contacts upon snapping of the disc.
A first embodiment has a pressure converter received on the disc support. The peripheral edge of the snap acting disc is received on a seat formed in the converter with an annular reaction ridge formed on the support.
A second embodiment has a pressure converter with the peripheral edge of the snap acting disc received on a seat formed in the disc support and an annular force ridge on the converter is adapted to contact the upper surface of the disc. In either embodiment a layer of low friction plastic can be placed on both faces of the disc.
A third embodiment has a flat metallic disc support with a recessed portion for receiving the disc and a continuous stop surface.
In all embodiments a cup shaped shell has a gasket received in a channel formed in a top end wall of the shell with the outer wall portion of the shell crimped over to compress the gasket and provide a gas tight seal.
The top end wall of the shell can be formed with a portion displaced from the wall to serve as an automatic valve deflator which can be used with any of the embodiments.
REFERENCES:
patent: 4220836 (1980-09-01), Hersey
patent: 4243858 (1981-01-01), Place
patent: 4342887 (1982-08-01), Sanford
patent: 4459444 (1984-07-01), Charboneau
Lesser Paul A.
Sanford Carlton E.
Haug John A.
McAndrews James P.
Sharp Melvin
Texas Instruments Incorporated
Tolin G. P.
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