Pneumatically operated switch assembly

Details Pneumatically operated switch assembly Pneumatically operated switch assembly

1982-03-05

1984-07-17

Scott, J. R.

Electricity: circuit makers and breakers

Fluid pressure

Diaphragm

200 34, H01H 3524

Patent

active

044608128

ABSTRACT:
A pneumatically operated switch assembly for controlling an electric current supply to an electric control system in addordance with a value of such a signal pressure as a negative or positive pressure, which comprises a spring-loaded diaphragm piston assembled within a housing to form a first chamber for connection to the signal pressure and a second closed chamber and being arranged to move to and away from its assembled position in accordance with a difference in pressure between the chambers, a check valve assembled with the diaphragm piston to allow the flow of air from the first chamber to the second chamber, an orifice member assembled with the diaphragm piston in parallel with the check valve to throttle the flow of air passing therethrough, and a switch assembly arranged within the housing to control the electric current supply in accordance with movement of the diaphragm piston.

REFERENCES:
patent: 2996155 (1961-08-01), Priesemuth
patent: 3236961 (1966-02-01), Kappel
patent: 3246094 (1966-04-01), Zaske et al.
patent: 3639711 (1972-02-01), Jordan et al.

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