Electricity: magnetically operated switches – magnets – and electr – Magnets and electromagnets – For magnetizing or demagnetizing
Patent
1984-03-06
1985-07-16
Harris, George
Electricity: magnetically operated switches, magnets, and electr
Magnets and electromagnets
For magnetizing or demagnetizing
335302, 361147, H01F 1300
Patent
active
045299544
ABSTRACT:
A device for magnetizing multipolar permanent magnet bodies employs a supporting structure comprising a series of superimposed sheets of electrically insulating material, which may be of fiberglass, with prepared apertures to receive an electrically conductive magnetizing winding; the apertures may be arranged to firmly support the winding to prevent displacement despite the strong magnetic fields generated by a high current impulse discharge, and the winding can be arranged to produce a variety of polar patterns, by providing a suitable opening in the supporting structure on cylindrical magnets. The supporting structure includes at least one plate having a plurality of magnetic poles disposed about the inner perimeter of its aperture. This plate permits alignment of a previously magnetized body, that is not presently magnetized but which has magnetic domains therein in a pattern corresponding to its previous magnetization, with the magnetic poles of the apparatus such that efficient re-magnetization occurs corresponding to the preferred direction of magnetization of the body.
REFERENCES:
patent: 3158797 (1964-11-01), Andrews
patent: 3335377 (1967-08-01), Kohlhagen
patent: 3461350 (1969-08-01), Rioux
patent: 3678436 (1972-07-01), Herdrich et al.
patent: 4162470 (1979-07-01), Smith
Steingroever Dietrich
Steingroever Erich
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