Differential pressure cutout switch

Details Differential pressure cutout switch Differential pressure cutout switch

1976-03-03

1978-03-28

Tolin, Gerald P.

Electricity: circuit makers and breakers

Fluid pressure

Diaphragm

200 83J, H01H 3534

Patent

active

040816362

ABSTRACT:
A differential pressure cutout switch including a low pressure operating point assembly and a high pressure operating point assembly which are mechanically linked and are operable to respond to first and second pressures supplied over respective first and second pressure inlets of the switch to control a contactor switch assembly which is movable to a first position to provide an open circuit between outputs of the switch and movable to a second position to connect a resistance of a finite value between the outputs as a function of the difference between the two pressures. The differential pressure cutout switch is described with reference to an application in a protection control system for monitoring lubrication oil pressure for a compressor of a refrigeration system.

REFERENCES:
patent: 2623963 (1952-12-01), Wolfe
patent: 3007017 (1961-10-01), Dwyer
patent: 3363072 (1968-01-01), Moody
patent: 3525262 (1970-08-01), Goran
patent: 3577208 (1971-05-01), Petrick
patent: 3591051 (1971-07-01), Mitchell
patent: 3676622 (1972-07-01), Brumbelow
patent: 3859484 (1975-01-01), Nelson

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