Dual action pressure switch

Details Dual action pressure switch Dual action pressure switch

1985-02-06

1986-06-03

Tolin, G. P.

Electricity: circuit makers and breakers

Fluid pressure

Diaphragm

200 83P, 200 814, H01H 3534

Patent

active

045931666

ABSTRACT:
There is provided a dual action pressure switch which comprises a casing having a pressure inlet, a diaphragm secured to and extending across the interior of the casing to define a pressure receiving chamber in the casing, a piston disposed on the side of the diaphragm opposite from the pressure receiving chamber for vertical movement subjected to pressure through the diaphragm, a holder biased to engage the piston under the force of a spring, a pair of stationary terminals having the lower ends extending downwardly beyond the lower end of the casing, a resilient disc disposed within the piston below the diaphragm for resiliently warping in one and the opposite directions and leaf springs subjected to the resilient force of the disc through a rod.

REFERENCES:
patent: 3657501 (1972-04-01), Hoyt
patent: 4296287 (1981-10-01), Boulanger
patent: 4400601 (1983-08-01), Brucker
patent: 4473729 (1984-09-01), Teng

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