Detector device for simultaneously detecting both the direction

Details Detector device for simultaneously detecting both the direction Detector device for simultaneously detecting both the direction

1989-11-09

1991-04-02

Strecker, Gerard R.

Electricity: measuring and testing

Magnetic

Displacement

123617, 137 47, 318653, 324165, 324174, 32420725, 32420712, 377 17, G01B 730, G01P 3487, G05D 1300, F02D 900

Patent

active

050049810

ABSTRACT:
A sensor for detecting a number of revolutions of a rotary shaft is provided which comprises a ring magnet secured to the outer peripheral surface of the rotary shaft, the number of revolutions of which is to be detected, a Hall IC arranged near the outer peripheral surface of the rotary shaft, for detecting the magnetism of the ring magnet. The ring magnet has one circumferential half of the outer peripheral surface thereof magnetized to serve as the north pole and the other circumferential half of the outer peripheral surface thereof magnetized to serve as the south pole.

REFERENCES:
patent: 3619680 (1971-11-01), Okamoto
patent: 4258324 (1981-03-01), Henrich
patent: 4376915 (1983-03-01), Penn
patent: 4490674 (1984-12-01), Ito
patent: 4495464 (1985-01-01), Kozai et al.
patent: 4499420 (1985-02-01), Shiraki et al.
patent: 4785242 (1988-11-01), Vaidya et al.

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