Electricity: circuit makers and breakers – Fluid pressure – Diaphragm
Patent
1988-06-14
1990-02-13
Tolin, Gerald P.
Electricity: circuit makers and breakers
Fluid pressure
Diaphragm
200 83J, 7386147, H01H 3540
Patent
active
049008838
ABSTRACT:
In a preferred embodiment, a fluid-operated switch continuously and selectively adjustable over both a pressure range and a vacuum range. The switch includes a diaphragm enclosed in a housing, a first side of the diaphragm communicating with the fluid. On the second side of the diaphragm, actuator means are provided which actuate an electrical switch when the diaphragm is flexed by changes in the pressure or vacuum of the fluid. A main spring provides adjustable resistance to motion of the actuator means in the direction of diaphragm flexure corresponding to an increase in pressure, while a counterspring provides resistance to motion of the actuator means in the direction of diaphragm flexure corresponding to an increase in vacuum. Adjustment of the set point of the switch is effected through adjusting the degree of compression or relaxation of the springs by adjusting a threaded bonnet on the housing. At one degree of compression, the spring forces are balanced and further compression will selectively shift the set point into the pressure region, while relaxation of the springs from that balance point will selectively shift the set point into the vacuum region. Thus, one valve body with one set of internal elements can be field adjusted for either pressure or vacuum operation.
REFERENCES:
patent: 3372372 (1968-03-01), Carpenter
patent: 4438305 (1984-03-01), Johnson
Brame J. Yancey
Horn Michael F.
Saucier Jeffrey A.
Siedman David L.
Thomas Emery G.
Crozier John H.
Tolin Gerald P.
Whitman Controls Corporation
LandOfFree
Fluid-operated compound switch does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Fluid-operated compound switch, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Fluid-operated compound switch will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1169572