Magnetizing method and apparatus for tone wheel

Details Magnetizing method and apparatus for tone wheel Magnetizing method and apparatus for tone wheel

2006-05-23

2006-05-23

Barrera, Ramon M. (Department: 2832)

Electricity: magnetically operated switches, magnets, and electr

Magnets and electromagnets

For magnetizing or demagnetizing

Reexamination Certificate

active

07049918

ABSTRACT:
A magnetizing method for tone wheel and apparatus, wherein the method comprises the steps of preparing a ring reinforcement made of magnetic material and attached to an annular body to be magnetized, the ring reinforcement comprising a tubular part and an other part integrally formed with the tubular part; holding the tubular part of the ring reinforcement with a fixture such as a jaw type chuck made of non-magnetic material; and apply an alternate magnetic flux to the annular body while axially rotating the fixing means, keeping one end of a magnetizing yoke approximate to the surface of the annular body, the alternate magnetic flux forming a circular closed loop which passes the one end of the magnetizing yoke and the other end of the magnetizing yoke, via the annular body and the ring reinforcement midway, thereby magnetizing the annular body in a manner that S poles and N poles are alternately formed along its periphery.

REFERENCES:
patent: 2001/0030533 (2001-10-01), Iwamoto et al.
patent: 2002-164213 (2002-06-01), None
patent: 2002-318239 (2002-10-01), None
patent: 2003-344098 (2003-12-01), None

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