Electronic pressure sensitive force transducer

Details Electronic pressure sensitive force transducer Electronic pressure sensitive force transducer

1983-06-13

1984-12-18

Albritton, C. L.

Electrical resistors

Mechanically variable

Surfaces pressed together

338 69, 338114, 338100, 84DIG7, H01C 1010, H01C 1012

Patent

active

044893027

ABSTRACT:
A bounceless switch apparatus having a junction resistance which varies inversely with the pressure applied normally thereto which includes a first conductor member, a pressure-sensitive layer including a semiconducting material covering the first conductor member in intimate electrically conducting contact therewith and a second conductor member positioned in nonelectrically conducting relationship to the pressure-sensitive layer. The pressure-sensitive layer has a first surface with a multiplicity of microprotrusions of the semiconducting material which provide a multiplicity of surface contact locations. As the normally open switch is closed in response to a pressing force applied to urge the second conductor member and the first surface together, the physical contact between the microprotrusions and the second conductor increases thereby variably increasing conduction between the first conductor member and the second conductor member.

REFERENCES:
patent: 2042606 (1936-06-01), Kotowski
patent: 3503031 (1970-03-01), Nyhus et al.
patent: 3806471 (1974-04-01), Mitchell
patent: 3875434 (1975-04-01), Harden et al.
patent: 4054540 (1977-10-01), Michalchik
patent: 4065649 (1977-12-01), Carter et al.
patent: 4085302 (1978-04-01), Zenk et al.
patent: 4145317 (1979-03-01), Sado et al.

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