Sensor rotor made from ring pieces having outer and inner edges

Details Sensor rotor made from ring pieces having outer and inner edges Sensor rotor made from ring pieces having outer and inner edges

1998-02-24

2000-04-18

Snow, Walter E.

Electricity: measuring and testing

Electrical speed measuring

Including speed-related frequency generator

384448, G01P 348, G01P 354, F16C 3200

Patent

active

06051969&

ABSTRACT:
The present invention relates to a method of manufacturing a sensor rotor with a minimum waste of material. The sensor rotor is manufactured by forming a plurality of ring pieces having outer and inner edges that are identical in curvature to each other, arranging the ring pieces in the shape of a ring, magnetizing the ring pieces to create opposite magnetic poles alternately in the circumferential direction of the ring pieces to form a magnetized ring, and fixing the magnetized ring to the inside of a press-in ring. Since the outer edge of each ring piece substantially coincides with the inner edge of the adjacent ring piece, it is possible to eliminate the waste of material between the adjacent ring pieces.

REFERENCES:
patent: 4877986 (1989-10-01), Shimizu

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