Capacitive capsule for aneroid pressure gauge

Details Capacitive capsule for aneroid pressure gauge Capacitive capsule for aneroid pressure gauge

1978-11-21

1980-10-21

Goldberg, E. A.

Electricity: electrical systems and devices

Electrostatic capacitors

Variable

73718, H01G 700

Patent

active

042297761

ABSTRACT:
A capsule for use in aneroid pressure gauges comprising a pair of membranes sealed to each other along peripherally extending side edge regions to define a sealed, interior space therebetween. One of the membranes is formed having a centrally located charge retaining region. A capacitor plate is fixed to the other membrane and is disposed within the sealed interior space in opposed relationship to the charge retaining region. The means by which the capacitor plate is fastened to its respective membrane is electrically conductive and extends through the membrane while being electrically insulated therefrom. Changes in pressure are measured by measuring the changes in the capacitance between the capacitor plate and charge retaining region, the latter changes being effected by the changes in the distance between the membranes resulting from pressure fluctuations. The aneroid capsule is particularly suited for use in connection with an aneroid pressure gauge utilized in radiosondes.

REFERENCES:
patent: 4120206 (1978-10-01), Rud
Rosemont Eng. Bulletin 6626, Minneapolis, Minn., 1970, p. 3.

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