Differential fluid pressure switch

Details Differential fluid pressure switch Differential fluid pressure switch

1983-03-24

1985-03-05

Pellinen, A. D.

Electricity: circuit makers and breakers

Fluid pressure

Diaphragm

200 83J, 200 83Y, 200 83SA, H01H 3540

Patent

active

045033013

ABSTRACT:
A fluid pressure switch includes a housing with a cylindrical bore, a spring housing bore and a guide bore between the cylindrical bore and the spring housing bore. A shaft member axially disposed in the housing between the bore, has a piston element secured on the end within the cylindrical bore for movement in one direction or another upon a differential between fluid pressure sources as presented to the two opposing surfaces of the piston element. A spring-biasing arrangement is secured to the shaft member on the end within the spring housing bore for opposing movement of the shaft member. The spring-biasing arrangement is adjustable both as to the spring force and as to the spring stop setting. A switch operator member secured to the piston member, spreads contact arms apart upon a predetermined displacement of the piston. The switch operator member has an elliptically-shaped eccentric portion which can be rotated to adjust the point of shaft displacement at which switch operation occurs.

REFERENCES:
patent: 3206572 (1965-09-01), Buehler
patent: 3262387 (1966-07-01), Reams
patent: 3475573 (1969-10-01), Maltais et al.
patent: 3951469 (1976-04-01), Hayashida
patent: 3967082 (1976-06-01), Remy
patent: 3980987 (1976-09-01), Ishigami et al.
patent: 4220836 (1980-09-01), Hersey
patent: 4404440 (1983-09-01), Busche

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