Patent ID: 6750647
Filing Date: 2004-06-15
Classification: G01P,H01F

Abstract:
A magnetizing apparatus for a magnetized pulser ring, in which a magnetizing portion of a magnetizing yoke is radially opposed to a cylindrical elastic magnetic member provided on a circumferential surface of a cylindrical steel plate so that magnetic-pole areas of opposite polarities are alternately formed circumferentially on the cylindrical elastic magnetic member, wherein:the magnetizing portion is a conical surface tilted with respect to an axis of the magnetizing yoke so that one axial end portion of the cylindrical elastic magnetic member comes into close contact with the magnetizing portion of the magnetizing yoke while another portion of the cylindrical elastic magnetic member other than the end portion does not make close contact with the magnetizing portion of the magnetizing yoke thereby resulting in a gap being provided adjacent the magnetizing yoke; and wherein inner and outer surfaces of the cylindrical elastic magnetic member are each cylindrical in shape so as to be substantially parallel to one another.