Electricity: circuit makers and breakers – Fluid pressure – Diaphragm
Patent
1993-11-05
1996-06-25
Kincaid, Kristine L.
Electricity: circuit makers and breakers
Fluid pressure
Diaphragm
200 83J, 200 83Q, 200 83W, 200 83Z, 200293, H01H 3534
Patent
active
055302157
ABSTRACT:
The problem of providing plurality of different models of pressure switches to suit the requirements of a plurality of differing manufacturers may be minimized or eliminated in a pressure switch, including a frame (20), a diaphragm (50) secured to the frame (20) and adapted to be exposed to a mechanical source of fluid under pressure, such as a compressor, and electrical contacts (64), (66), (70) mounted on the frame (20) for relative movement toward and away from each other between open and closed positions. A lever system (72), (80) is mechanically interposed between the diaphragm (50) and the contacts (64), (66), (70) for effecting the previously mentioned relative movement and an unloader valve (110) is mounted on the frame (20) and adapted to be connected to the source of pressure fluid and operable when the contacts (64), (66), (70) are in an open position to vent fluid under pressure from the source. The system includes a bell crank (118) responsive to the lever system (72), (80) for operating the unloader valve (110) and the frame (20) is provided with at least two spaced mounting elements (116), (164), (166), (168) for mounting the unloader valve (110) with the bell crank (118) being selectively mountable at points (126), (127) adjacent either of the mounting elements (116), (164), (166) and (168).
REFERENCES:
patent: 3283111 (1966-11-01), Wirsching
patent: 3764763 (1973-10-01), Barnes
patent: 3875358 (1975-04-01), Willcox
patent: 4166996 (1979-09-01), Matthies
patent: 4863356 (1989-09-01), Lindsey et al.
patent: 5139051 (1992-08-01), Walstad et al.
patent: 5338908 (1994-08-01), Rahman et al.
Friedhofer Michael A.
Furnas Electric Company
Kincaid Kristine L.
LandOfFree
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