Tachometer

Details Tachometer Tachometer

1981-03-30

1983-03-15

Krawczewicz, Stanley T.

Electricity: measuring and testing

Electrical speed measuring

Including speed-related frequency generator

73519, 324174, 340671, G01P 348, G01P 354

Patent

active

043769152

ABSTRACT:
A tachometer comprises a magnet having north and south magnetic poles and a magnetically operated switch for sensing movement of the magnet and for producing an output signal in response thereto. The magnet is supported on one end of a shaft which is supported for rotation in a bearing. The other end of the shaft is threaded into the rotating member, the output of which is to be measured. The bearing is mounted on a plate so that the plate and shaft are independently movable. The switch is mounted on the plate in proximity to the magnet to detect movement of the magnet. The frequency of the output signals produced by the switch indicates the rate of rotation of the rotating member.

REFERENCES:
patent: 3447034 (1969-05-01), Smith
patent: 3548663 (1970-12-01), Radin
patent: 3683219 (1972-08-01), Kruse
patent: 3719841 (1973-03-01), Ritsema
patent: 3739211 (1973-06-01), Hasler
patent: 3787807 (1974-01-01), Anselmino et al.
patent: 3805161 (1974-04-01), Bayha et al.
patent: 3898563 (1975-08-01), Erisman
patent: 4257040 (1981-03-01), Shirasaki et al.
patent: 4266192 (1981-05-01), Ohtani
Clark, Rotary Tachometer/Encoder, IBM Technical Disclosure Bulletin, vol. 18, No. 9, Feb. 1976, p. 2787.

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