Electricity: measuring and testing – Electrical speed measuring – Including speed-related frequency generator
Patent
1991-07-01
1993-11-23
Strecker, Gerard R.
Electricity: measuring and testing
Electrical speed measuring
Including speed-related frequency generator
32420720, 32420722, 32420721, 384448, 188181A, G01P 3487, G01R 3306
Patent
active
052647900
ABSTRACT:
A device for detecting speed in a braking system between two relatively rotatable elements, such as, the inner and outer rings of a roller bearing used to support a vehicle wheel. The device includes a first deflector mounted on one of the bearing rings having a magnetized ring member and a plurality of radially outwardly facing poles separated by non-magnetized spaces and a serrated annular member having a plurality of radially inwardly facing ribs. The device further includes a second deflector integral with a fixed ring of the bearing having at least one magnetic sensor engageable between the two bearing rings and spaced to intersect the magnetic fields to produced a plurality of signals per revolution. The signal produced by the sensor has a frequency proportional to the relative speed of the inner and outer bearing rings.
REFERENCES:
patent: 3162804 (1964-12-01), Parsons
patent: 3636767 (1972-01-01), Duffy
patent: 4525670 (1985-06-01), Miyagawa et al.
patent: 4810965 (1989-03-01), Fujiwara et al.
Moretti Roberto
Vignotto Angelo
Edmonds Warren S.
Renz Jr. Eugene E.
SKF Industrie S.p.A.
Strecker Gerard R.
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