Signals and indicators – Indicators – Fluid flow
Patent
1979-03-15
1980-12-23
Goldberg, Gerald
Signals and indicators
Indicators
Fluid flow
116285, G01L 708
Patent
active
042403723
ABSTRACT:
There is disclosed a pressure responsive device incorporating a snap action disc spring having arms for actuating an indicator plate with indicia thereon. In one arrangement the arms extend from the inner peripheral edge of the disc spring, and in other arrangements the arms extend from the outer peripheral edge of the spring. The indicator plate is adapted for rotational movement with lateral movements of the arms when the spring snaps, as by direct connection to the ends of the arms or by means of gearing or other provision of converting linear motion to rotary motion of a pin or shaft of the indicator plate. The plate is below a cover that has openings in which the indicia are aligned upon its rotation to the position caused by the snap action of the disc spring in response to predetermined level of pressure of fluid applied to the pressure responsive device.
REFERENCES:
patent: 2134299 (1938-10-01), Cosner
patent: 2824919 (1958-02-01), Davis
patent: 2953658 (1960-09-01), Davis
patent: 3908378 (1975-09-01), Wolfe
Corr Denis E.
Goldberg Gerald
Turner Perry E.
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