Electricity: magnetically operated switches – magnets – and electr – Magnets and electromagnets – Magnet structure or material
Patent
1998-08-21
1999-09-28
Gellner, Michael L.
Electricity: magnetically operated switches, magnets, and electr
Magnets and electromagnets
Magnet structure or material
H01F 702
Patent
active
059595205
ABSTRACT:
An improved magnetic decoupler with a magnetic field shape, strength and gradient optimized for releasing security tags, such as an antitheft device of the type described above. Due to the structure of the magnetic decoupler, it contains less ferrous material than prior art decouplers heretofore employed. Reduction in size of the magnetic decoupler, along with improved magnetic strength, derive from the magnet assembly including magnets arranged with orientations in quadrature to increase axial magnetic field gradient within the decoupler cavity by superposition of the magnetic fields of each magnet.
REFERENCES:
patent: 4339853 (1982-07-01), Lipschitz
Choit David
Devaney Thomas J.
Stelter Richard E.
Barrera Raymond
Dexter Magnetic Technologies, Inc.
Gellner Michael L.
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