Differential pressure switch

Details Differential pressure switch Differential pressure switch

1974-12-04

1976-03-23

Tolin, Gerald P.

Electricity: circuit makers and breakers

Fluid pressure

Diaphragm

200 83Y, 92 38, 73407R, H01H 3534, H01H 3538

Patent

active

039461769

ABSTRACT:
A differential pressure module is secured in switching relation to the actuating plunger of an electrical switching mechanism. Comprising the differential pressure module are two piston/cylinder assemblies connected together in back-to-back configuration by secured cross members forming a floating yoke. Each of the assemblies includes a diaphragm in communication with a separate oppositely directed fluid inlet and through which a force differential effective from the separate forces acting in opposition to each other is applied via the yoke against the switch actuator. A cast body intervening between the assemblies defines the fluid inlets while maintaining the pressure of each isolated from the other.

REFERENCES:
patent: 2173082 (1939-09-01), Kalischer
patent: 2253365 (1941-08-01), Dawson
patent: 2735369 (1956-02-01), Turvey
patent: 2917081 (1959-12-01), Nolte
patent: 3034357 (1962-05-01), Brown
patent: 3240065 (1966-03-01), Taber
patent: 3393612 (1968-07-01), Gorgens
patent: 3859484 (1975-01-01), Nelson

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