Capacitive pressure sensing device

Details Capacitive pressure sensing device Capacitive pressure sensing device

1976-03-29

1978-04-18

Ciarlante, Anthony V.

Measuring and testing

Fluid pressure gauge

With protective separator

73716, G01L 912

Patent

active

040844382

ABSTRACT:
A pressure sensing device and method of construction therefor. The device includes at least two dielectric discs which are fused together at their peripheral boundary to form a hollow monolithic capsule having two nominally planar opposed inner surfaces. The opposed inner surfaces of the capsule are mutually separated by a uniform gap near the peripheral boundary and by a distance related to the difference in pressure interior and exterior to the capsule otherwise. Conductive films are disposed on opposed portions of the inner surfaces of the capsule. The device further includes a means for electrically coupling each of the conductive films to an associated terminal exterior to the capsule. The capacitance between these terminals is related to the above-mentioned pressure differential.

REFERENCES:
patent: 1559063 (1925-10-01), Becker
patent: 2649579 (1953-08-01), Alexander
patent: 3040582 (1962-06-01), Lorenz
patent: 3356963 (1967-12-01), Buck
patent: 3405559 (1968-10-01), Moffatt
patent: 3643510 (1972-02-01), Lissau
patent: 3645137 (1972-02-01), Hazen
patent: 3715638 (1973-02-01), Polye
patent: 3858097 (1974-12-01), Polye

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