Electricity: circuit makers and breakers – Fluid pressure – Diaphragm
Patent
1979-11-23
1981-10-20
Tolin, Gerald P.
Electricity: circuit makers and breakers
Fluid pressure
Diaphragm
92 78, 200 83S, 200302, H01H 3534
Patent
active
042962870
ABSTRACT:
An electric switch actuated in response to a condition, such as the occurrence of a particular pressure level, is shown to comprise a base having a switch receiving chamber and having an open end closed by a snap-acting diaphragm assembly. A motion transfer pin is slidably mounted between the diaphragm and a movable contact arm to transfer motion from the diaphragm to the arm. The diaphragm is supported on an annular plate used to prevent over pressures from deleteriously effecting the diaphragm and may be used in forming and calibrating the diaphragm for snapping in one direction. An adjustable spring is disposed on the other side of the diaphragm to permit calibration adjustment of the diaphragm for snapping in the opposite direction. The spring is mounted in a housing adapted to be connected to a pressure source. The switch is weatherproofed by providing a skirt which depends from the housing and extends toward and beyond the base. The space between the skirt and the base and components associated therewith is filled with potting material. An orifice is formed in the bottom wall of the base and a porous plug of sintered powdered metal is received in the orifice and projects out beyond the potting to permit pressure equalization between ambient and within the chamber.
REFERENCES:
patent: 2629543 (1953-02-01), Maniscalco
patent: 2685650 (1954-08-01), Collins
patent: 2844305 (1958-07-01), Becht
patent: 2973833 (1961-03-01), Cook
patent: 2985358 (1961-05-01), Lee
patent: 3584168 (1971-06-01), Halpert
patent: 3816685 (1974-06-01), Fiore
patent: 3864537 (1975-02-01), Fiore
patent: 4037317 (1977-07-01), Bauer
Boulanger Henry J.
Lowell Victor
Whipple Elliot
Haug John A.
McAndrews James P.
Sharp Melvin
Texas Instruments Incorporated
Tolin Gerald P.
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