Electricity: circuit makers and breakers – Fluid pressure – Diaphragm
Patent
1997-04-17
1999-03-30
Tolin, Gerald P.
Electricity: circuit makers and breakers
Fluid pressure
Diaphragm
200 83J, H01H 3534
Patent
active
058892478
ABSTRACT:
A normally closed, fluid pressure responsive electric switch (10) has an electrically conductive body (12) formed with an orifice (12a) leading to a pressure chamber (12c) which is separated from a switch chamber by a flexible member (14). An annular support plate (18) and disc seat (20) are sandwiched in the body by crimping distal free end (12g) of body (12) over the flange (26b) of a connector body (26). A pressure/force converter (22) has a plurality of outwardly extending fingers which are interdigitated with a corresponding number of fingers extending inwardly from an aperture in the disc seat. The converter has one end (18b) engaging the membrane and an opposite end having a circular force applying surface (22g) adapted to engage a snap acting disc (24) disposed on the disc seat within a recess formed in the connector body. The disc is centered by a centering lip (22e) formed on the converter fingers. A terminal (28) extends through the connector base (26) and has a terminal rib (28e) which engages the opposite side of the disc forming an electric path from the terminal through the terminal rib to the disc and from the disc to the disc seat in one of two opposite configurations of the disc and from the disc seat to body (12) through deformed portions (12h) of the body wall (12f). In an alternate embodiment a two terminal switch (10') is provided by placing a second terminal (34) in electrical engagement with disc seat (20') and electrically isolating the disc seat from the body (12).
REFERENCES:
patent: 4948931 (1990-08-01), Nixon
patent: 5015808 (1991-05-01), Czarn
patent: 5049708 (1991-09-01), Baker
patent: 5278367 (1994-01-01), Homol
patent: 5508483 (1996-04-01), Czarn et al.
patent: 5708245 (1998-01-01), Werner
Baumann Russell E.
Donaldson Richard L.
Grossman Rene E.
Texas Instruments Incorporated
Tolin Gerald P.
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