Electricity: measuring and testing – Electrical speed measuring – Including speed-related frequency generator
Patent
1989-02-17
1990-04-10
Eisenzopf, Reinhard J.
Electricity: measuring and testing
Electrical speed measuring
Including speed-related frequency generator
324262, 32420722, 310168, G01B 714, G01P 348, G01P 354, H02K 1742
Patent
active
049163906
ABSTRACT:
The invention consists of a toothed wheel which in conjunction with a fixed sensor measures the revolutions or the angular velocity of a rotating component. The toothed wheel is constructed as a coil spring mounted on a circular ring-shaped mounting device and moved around a pivot with the rotation motion to be measured. The coil spring consists of an infinite helix the windings of which are of ferromagnetic material. Since the coil spring is moved past the fixed sensor, the change of the magnetic field in the coil of the sensor causes the generation of an alternating voltage the frequency of which is substantially proportional to the angular velocity of the toothed wheel.
REFERENCES:
patent: 3801845 (1974-04-01), Gavitt, Sr.
Frank, "Scheibenaufermalaren" Fienwerktechnik-74-1970-Heft 1, pp. 22-24.
Christoleit Arno
Piesbergen Lutz
Schmidt Reinhard
Eisenzopf Reinhard J.
Ray, Jr. James O.
Snow Walter E.
Wabco Westinghouse Fahrzeugbremsen GmbH
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