Communications: electrical – Continuously variable indicating – With particular transmitter
Patent
1981-11-06
1983-11-29
Groody, James J.
Communications: electrical
Continuously variable indicating
With particular transmitter
324 61R, 340347P, G08C 1910
Patent
active
044183470
ABSTRACT:
A rotational position detecting apparatus suitable for the crank angle sensor of an engine is disclosed. The apparatus comprises a first and a second plate in a manner so that the first plate is placed opposite to the second plate, the first plate including a first and a second toothed electrode and a first and a second circular electrode, the second plate including a third and a fourth toothed electrode and a third and a fourth circular electrode, the first and second toothed electrodes and the first and second circular electrodes being electrically connected with each other, correspondingly and respectively, the third and fourth toothed electrodes and the third and fourth circular electrodes being electrically connected with each other, correspondingly and respectively, a first signal and a second signal having the opposite phase to that of the first signal being applied to the first and second toothed electrodes of the first plate respectively thereby detecting rotational position of the second plate. The apparatus further comprises a compensating capacitor for cancelling the distributed capacity existing between the electrodes of the first plate.
REFERENCES:
patent: 3222668 (1965-12-01), Lippel
patent: 3873916 (1975-03-01), Sterki
patent: 3938113 (1976-02-01), Dobson et al.
patent: 3961318 (1976-06-01), Farrand et al.
patent: 4092579 (1978-05-01), Weit
Akita Shigeyuki
Tanaka Hiroaki
Groody James J.
Nippon Soken Inc.
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