End caps on hollow magnets

Details End caps on hollow magnets End caps on hollow magnets

2005-02-15

2005-02-15

Barrera, Ramon M. (Department: 2832)

Electricity: magnetically operated switches, magnets, and electr

Magnets and electromagnets

Magnet structure or material

C335S304000

Reexamination Certificate

active

06856224

ABSTRACT:
A compact permanent magnet structure is provided to produce a uniform magnetic biasing field confined to an internal cavity of a cylindrical magnetic flux source which eliminates the drawbacks, shortcomings, limitations and difficulties associated with an elongated magic ring. The compact permanent magnet structure is composed of a cylindrical magnetic flux source with a cylindrical axis, a hollow central cavity, an inner diameter and a remanence perpendicular to said cylindrical axis. The ends of the cylindrical magnetic flux source are capped by a first magnetic flux source and a second magnetic flux source. The compact permanent magnet structure produces a uniform biasing field by capping the end of the cylindrical magnetic flux source with a hemispheric section of a magic sphere having a cavity diameter and shell axis equivalent to the magic ring. The cylindrical magnetic flux source can be a magic ring and the caps can either be geometric or parametric. A method for producing the uniform magnetic biasing field in a compact permanent magnet structure is also provided.

REFERENCES:
patent: 4835506 (1989-05-01), Leupold
patent: 4839059 (1989-06-01), Leupold
patent: 5126713 (1992-06-01), Leupold
patent: 5319339 (1994-06-01), Leupold
patent: 5337472 (1994-08-01), Leupold
patent: 5805044 (1998-09-01), Leupold
H.A. Leupold, “An Overview of Permanent Magnet Design”, U.S. Army T.R. SLCET-TR-90-6, Aug. 1990.

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