Structure of a projection for an electromagnetic pick-up in a ro

Details Structure of a projection for an electromagnetic pick-up in a ro Structure of a projection for an electromagnetic pick-up in a ro

1998-01-26

2000-08-29

Snow, Walter E.

Electricity: measuring and testing

Magnetic

Displacement

32420725, G01B 714

Patent

active

061114049

ABSTRACT:
A detected projection is integrally provided on one side of a rotor produced by pressing a plate material. A portion of a rotor is allowed to bulge from one side of the rotor by pressing. At least one end of the projection in a circumferential direction of the rotor is comprised of a shear end face steeply rising from the side of the rotor by a shearing effect during pressing. The shear end face is formed as a sensing end face for an electromagnetic pick-up. The detected projection generates a rotation detecting pulse in an electromagnetic pick-up disposed in proximity to the rotor. The accuracy in size of the projection is enhanced and moreover, when the projection is detected by the electromagnetic pick-up, a pulse wave form is generated clearly and sharply, thereby enhancing the sensing accuracy.

REFERENCES:
patent: 3961215 (1976-06-01), Gee et al.
patent: 5053656 (1991-10-01), Hodge

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