Rotational speed detecting apparatus

Details Rotational speed detecting apparatus Rotational speed detecting apparatus

1978-11-13

1981-05-05

Tokar, Michael J.

Electricity: measuring and testing

Electrical speed measuring

Including speed-related frequency generator

324166, 324174, 324228, G01P 348

Patent

active

042661927

ABSTRACT:
An apparatus for obtaining a signal relative to rotational speed of a rotary element is disclosed. The apparatus comprises a permanent magnet and a magnetic body which relatively approaches or moves away from the permanent magnet according to the rotational speed of a rotary member. A magneto-sensitive switch is operated in response to the change in intensity of the magnetic field produced by the relative motion between the permanent magnet and the magnetic body. Therefore, there can be obtained an apparatus which is small in size and high reliability.

REFERENCES:
patent: 3205323 (1965-09-01), Deshautreaux
patent: 3253099 (1966-05-01), Hess
patent: 3611343 (1971-10-01), Schoenbach
patent: 3723891 (1973-03-01), Whiteley
patent: 3898563 (1975-08-01), Erisman
patent: 3936754 (1976-02-01), Minami

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