Electricity: measuring and testing – Electrical speed measuring – Including speed-related frequency generator
Patent
1992-05-28
1994-02-22
Snow, Walter E.
Electricity: measuring and testing
Electrical speed measuring
Including speed-related frequency generator
3242072, 32420721, 32420725, 310168, G01P 348, G01P 354, G01B 714
Patent
active
052891208
ABSTRACT:
A railway axle is described of the type in which a rolling element bearing is mounted within a seat defined between two members, a first of which rotates with respect to the second, and is provided, externally of the seat, with a sealing assembly adapted to protect respective rolling bodies of the bearing; an annular element of the sealing assembly is fixed for rotation with the rotating member of the axle and is provided with a plurality of permanently magnetized zones having substantially the same width circumferentially spaced from one another with substantially constant pitch; within the seat and close to the said annular element of the sealing assembly there is further provided a sensor carried by the fixed member of the axle and adapted to be activated by the transit past it of the said magnetized zones to generate a periodic signal having a frequency proportional to the number of these which transit past the sensor in unit time.
REFERENCES:
patent: 4161120 (1979-07-01), Cloarec
patent: 4732494 (1988-03-01), Guers et al.
patent: 4946295 (1990-08-01), Hajzler
patent: 5017868 (1991-05-01), Hajlzer
patent: 5097701 (1992-03-01), Nantua et al.
patent: 5097702 (1992-03-01), Nantua et al.
Bertorelli Dario
Genero Matteo
Moretti Roberto
SKF Industrie S.P.A.
Snow Walter E.
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