Pressure switch

Details Pressure switch Pressure switch

1979-06-11

1981-02-03

Tolin, Gerald P.

Electricity: circuit makers and breakers

Fluid pressure

Diaphragm

200 83S, 200 816, H01H 3534

Patent

active

042490480

ABSTRACT:
A pressure switch has a support structure on which a flexible diaphram is mounted in communication with a source of variable pressure such as a fluid conduit. A first linkage has one end operatively connected to the diaphram and the other end pivotally connected to a cradle having a mercury switch mounted therein. A second linkage is pivotally connected at one end to the support structure and pivotally connected at the other end to the cradle so that the cradle is freely pivotable in response to movements of the first linkage. A quantity of liquid mercury in the mercury switch moves into and out of contact with the mercury switch electrodes in response to pivotal movement of the cradle by the first linkage when the diaphram is moved between first and second positions corresponding to low and high pressure conditions respectively.

REFERENCES:
patent: 2355872 (1944-08-01), Kronmiller
patent: 2730591 (1956-01-01), Nielson
patent: 2773957 (1956-12-01), Davis
patent: 2930866 (1960-03-01), Peterson
patent: 3132331 (1964-05-01), Boddy
patent: 3358098 (1967-12-01), Hill

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