Methods of manufacture of permanent magnet structures with sheet

Details Methods of manufacture of permanent magnet structures with sheet Methods of manufacture of permanent magnet structures with sheet

1995-09-11

1997-06-03

Hall, Carl E.

Metal working

Method of mechanical manufacture

Electrical device making

29415, 29416, H01F 4102

Patent

active

056342632

ABSTRACT:
Methods of manufacturing relatively complex permanent magnet structures uizing sheets of permanent magnet material. Different permanent magnet structures such as rings, cylinders, spheres, oblate and prolate forms are made from cut or stamped sections of the sheets of permanent magnet material. In one embodiment, toroidal sections having a uniform magnetic orientation are cut or stamped out. The sections are rearranged to form a "magic" ring having a desirable substantially uniform magnetic field in the center thereof. In another embodiment, the "magic" rings are stacked together to form a "magic" cylinder. In another embodiment, the "magic" rings are divided and beveled to form wedges, slices, or spheroidal segments that are used to assemble a "magic" sphere having a central working cavity with a desirable relatively strong uniform magnetic field. In yet another embodiment, sheets of permanent magnet material are cut into trapezoidal sections and the trapezoidal sections arranged to form oblate and prolate permanent magnet structures that permit relatively distortion free polar and equatorial access respectively. The present invention, in utilizing a sheet of permanent magnet material and the stamping of shapes, makes possible inexpensive and easily mass produced manufacturing of relatively complex permanent magnet structures. This makes possible wide spread application of relatively complex permanent magnet structures having desirable magnetic fields to many known devices.

REFERENCES:
patent: 2433660 (1947-12-01), Granfield
patent: 5337472 (1994-08-01), Leupold et al.

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