Capacitance type distance detecting apparatus

Details Capacitance type distance detecting apparatus Capacitance type distance detecting apparatus

1981-11-06

1983-12-27

Groody, James J.

Communications: electrical

Continuously variable indicating

With particular transmitter

324 61R, G08C 1910

Patent

active

044234171

ABSTRACT:
A capacitance type distance or position detecting apparatus includes a first fixed plate having first and second alternately arranged electrodes. A second plate which moves with a shaft has first, second, third and fourth alternately arranged electrodes in opposing relationship to the electrodes on the first plate. First and second travel distance signals are generated due to capacitance changes caused by changes in the opposed relationship between the electrodes on the first plate and the electrodes on the second plate. Logic operations are performed on the first and second travel distance signals to generate a display of distance of travel.

REFERENCES:
patent: 3355806 (1967-12-01), Brook
patent: 3702467 (1972-11-01), Melnyk
patent: 3961318 (1976-06-01), Ferrand et al.
patent: 4029579 (1978-05-01), Weit

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