Device for converting pneumatic or hydraulic pressure into an el

Details Device for converting pneumatic or hydraulic pressure into an el Device for converting pneumatic or hydraulic pressure into an el

1979-01-17

1981-09-15

Woodiel, Donald O.

Measuring and testing

Fluid pressure gauge

Null balance type

73722, G01L 910

Patent

active

042890349

ABSTRACT:
A device for converting a pneumatic or hydraulic pressure into an electrical current and vice versa according to the compensation principle, with a pressure transducer with a pressure-dependent moveable element, an electromagnetic force transducer, the moveable part of which force transducer standing in connection with the element, and a position indicator transmitter which converts the movement of the pressure transducer into an electrical or pneumatic control signal for the force- or pressure transducer. As a pressure transducer, there are provided two bellows with slightly different operative or effective surfaces which respectively are each fixed on one end and with their other ends stand in connection with one another and with the moveable element and are subjected to the same pressure.

REFERENCES:
patent: 2521477 (1950-09-01), Pellettere
patent: 2980835 (1961-04-01), Williams
patent: 3084551 (1963-04-01), Westman
patent: 3461726 (1969-08-01), Ziegler

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