Fluid pressure operated electrical switch

Details Fluid pressure operated electrical switch Fluid pressure operated electrical switch

1981-04-03

1983-08-23

Tolin, G. P.

Electricity: circuit makers and breakers

Fluid pressure

Piston

200 83J, 200 83Q, H01H 3538

Patent

active

044006020

ABSTRACT:
A fluid pressure operated electrical switch has a piston element subject to an operating fluid pressure on its acting end face for actuating an electrical switch. The switch employs a limiting member for limiting motion of the piston element to a predetermined extent in order to prevent the switch from being damaged due to overstroke of the piston element. The limiting member includes a flange at the rearmost end of the piston element and an annular shoulder in a bushing which is closely fitted within a port of a switch body for the operating fluid pressure. The piston element is loosely fit in the bushing with the flange in engagement within the shoulder of the bushing such that the flange and shoulder cooperate to provide limitation of the stroke of the piston element.

REFERENCES:
patent: 2736778 (1956-02-01), Buchanan
patent: 3261958 (1966-07-01), Bittner
patent: 3444341 (1969-05-01), Mighton
patent: 4225760 (1980-09-01), Griffith

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