Mechanical magnets of magnetostrictive, remanent, circularly mag

Details Mechanical magnets of magnetostrictive, remanent, circularly mag Mechanical magnets of magnetostrictive, remanent, circularly mag

1974-07-12

1976-02-17

Harris, G.

Electricity: magnetically operated switches, magnets, and electr

Magnets and electromagnets

Magnetostrictive-type device

335285, H01F 720, H01H 5500

Patent

active

039394484

ABSTRACT:
Mechanically controllable magnet made of a magnetostrictive, circularly magnetically anisotropic, circularly magnetized rod. There is no apparent magnetism externally. When rod is twisted, circular anisotropy becomes helical and circular magnetization also becomes helical to produce an axial field component and hence externally apparent magnetism. When rod untwists, it restores itself to its apparently non-magnetic condition.

REFERENCES:
patent: 518092 (1894-04-01), Collier
patent: 2287286 (1942-06-01), Bing et al.
patent: 2920529 (1960-01-01), Blythe
patent: 3121193 (1964-02-01), Engelsted et al.
patent: 3428867 (1969-02-01), Becker
"Magnetostriction", The International Nickel Co., pp. 1-7, Feb. 1952.

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