Electricity: magnetically operated switches – magnets – and electr – Magnets and electromagnets – Work or object holding type
Patent
1998-12-17
2000-05-09
Donovan, Lincoln
Electricity: magnetically operated switches, magnets, and electr
Magnets and electromagnets
Work or object holding type
335284, 335302, H01F 720
Patent
active
060609702
ABSTRACT:
The invention is a fixture assembly for magnetizing a permanent magnet hollow cylindrical member to produce a high axial magnetic field in the cylindrical member's axial bore. The fixture assembly has at least one high permeability soft magnetic component positioned along the cylindrical member's longitudinal axis. A means for maintaining the high permeability soft magnetic component positioned along the cylindrical member's longitudinal axis is present. A means for directing a high magnetic field through the high permeability soft magnetic component and hollow cylindrical member provides magnetization of the cylindrical member.
Also disclosed is a method of magnetizing a hollow cylindrical member to produce a high axial magnetic field in the cylindrical member's axial bore using the fixture assembly.
REFERENCES:
patent: 3219889 (1965-11-01), Polushkin
patent: 3417295 (1968-12-01), Littwin
patent: 4359765 (1982-11-01), Mimura et al.
patent: 4749978 (1988-06-01), Imamura et al.
patent: 5659280 (1997-08-01), Lee et al.
Donovan Lincoln
Nguyen Tuyen T.
Randall Tipton L.
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