Electricity: electrical systems and devices – Electrostatic capacitors – Variable
Patent
1977-05-10
1979-09-18
Goldberg, E. A.
Electricity: electrical systems and devices
Electrostatic capacitors
Variable
73724, H01G 700
Patent
active
041685180
ABSTRACT:
A pressure sensing transducer and method of construction therefor. The device includes a pair of contoured dielectric plates joined together at their periphery and having a central portion with conductive film on opposed portions of the inner surfaces of the dielectric plates. One or more regions between the central portion and the periphery are of reduced thickness and pressure or force loading of the transducer causes deformation to occur in the dielectric elements to cause the spacing between the conductive films to vary in relationship to the applied pressure or force. The regions of reduced cross-section serve to reduce the stress setting up in the joint and to reduce the distortion of the central portion due to the application of pressure or force. The device further includes means for electrically coupling each of the conductive films to an associated terminal exterior of the transducer.
REFERENCES:
patent: 2121148 (1938-06-01), Hagen
patent: 2164638 (1939-07-01), Broeze
patent: 3292059 (1966-12-01), Woods
patent: 3308357 (1967-03-01), Youngblood
patent: 3376376 (1968-04-01), Smith
patent: 3381190 (1968-04-01), Hoogenboom
patent: 3715638 (1973-02-01), Polye
patent: 3858097 (1974-12-01), Polye
patent: 3859575 (1975-01-01), Lee
patent: 4064549 (1977-12-01), Cretzler
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