Electricity: magnetically operated switches – magnets – and electr – Magnets and electromagnets – Magnet structure or material
Patent
1990-07-23
1993-07-20
Picard, Leo P.
Electricity: magnetically operated switches, magnets, and electr
Magnets and electromagnets
Magnet structure or material
310156, H01F 300, H01F 702
Patent
active
052297381
ABSTRACT:
A magnetic object having a plurality of pole regions of small dimensions and adapted to be molded in a molding device. The object includes a body of a given shape, for instance a cylindrical block or a cylindrical sleeve having an outer diameter smaller than 5 mm, and including alternating north and south poles. The body is made of a mixture of grains of fully magnetized anisotropic permanent magnet material and a hardening binding agent. The grains are reduced from a permanent magnet until all grains are smaller than the smallest dimension of a pole region and in the pole regions at least those grains having a size of the same range of size as the smallest dimension of a pole region are distributed in accordance with the alternating north and south poles.
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Shimoda, T. et al. "New Resin-Bonded Sm.sub.2 Co.sub.17 Type Magnets." IEEE Transactions on Magnetics, vol. 16, No. 5 (Sep. 1980), pp. 991-993.
Barrera Raymond
Kinetron B.V.
Picard Leo P.
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