Measuring and testing – Gas analysis – Moisture content or vapor pressure
Patent
1976-04-09
1977-12-06
Woodiel, Donald O.
Measuring and testing
Gas analysis
Moisture content or vapor pressure
73406, 73419, 338 39, 338 42, G01L 902, G01L 708, G01L 716
Patent
active
040610349
ABSTRACT:
A device operable in response to an input fluid force includes a housing having an inner surface and a fluid pressure responsive member carried within the housing and having a surface that abuts the inner surface of the housing. The surfaces are curved and their curvatures differ so that the fluid responsive member makes a rocking contact with the housing surface. A first force is exerted on the fluid pressure responsive member at one point and a variable force to be measured is exerted against the fluid pressure responsive member at a second point so that the point of contact of the curved housing surface and the curved surface of the fluid pressure responsive member varies as a function of the two forces. In one embodiment of the invention a variable electric resistance is arrayed along one of the surfaces and the point of contact of the two surfaces determines the resistance of an electric circuit passing through the two members to provide an electrical output indication proportional to the point of contact and accordingly the magnitude of the variable force.
REFERENCES:
patent: 2790043 (1957-04-01), Clason
patent: 3723936 (1973-03-01), Zurstadt
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