Bearing associated with means for determining rotational speed

Details Bearing associated with means for determining rotational speed Bearing associated with means for determining rotational speed

1986-10-31

1988-09-27

Eisenzopf, Reinhard J.

Electricity: measuring and testing

Electrical speed measuring

Including speed-related frequency generator

384448, 250231SE, 34087002, G01D 534

Patent

active

047744634

ABSTRACT:
A thrust bearing contructed to comprise a pair of disc elements one of which is arranged to rotate and the other of which is kept stationary, the surface of the rotating side opposing the stationary element being provided with a pattern of spiral grooves which are non-reflective while the remaining lands of the pattern are reflective so that a pulsed light beam is reflected from the pattern when a light beam is directed onto the rotating pattern through a hole provided in the stationary element, the reflected light pulses being utilized for determining the rotational speed of the element under rotation.

REFERENCES:
patent: 3693024 (1972-08-01), Hulle
patent: 3757128 (1973-09-01), Vermeulen
patent: 3935447 (1976-01-01), Black
patent: 4093853 (1978-06-01), Hunt
patent: 4132890 (1979-01-01), Garcia et al.
patent: 4253021 (1981-02-01), Ernst
patent: 4327362 (1982-04-01), Hoss
patent: 4652746 (1987-03-01), Fenske

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