Electricity: magnetically operated switches – magnets – and electr – Magnets and electromagnets – Magnet structure or material
Patent
1998-11-24
1999-12-07
Donovan, Lincoln
Electricity: magnetically operated switches, magnets, and electr
Magnets and electromagnets
Magnet structure or material
335300, H01F 500
Patent
active
059990759
ABSTRACT:
An open magnet useful in magnetic resonance imaging (MRI) applications. The magnet has two spaced-apart assemblies. Each assembly has a shielding coil located longitudinally outward from a main coil and a magnetizable pole piece spaced apart from and proximate the main and shielding coils. The method of the invention generates a magnetic field in a first area between the two assemblies while shielding a second area not between the two assemblies from a stray magnetic field by creating the previously-described open magnet.
REFERENCES:
patent: 5436607 (1995-07-01), Chari et al.
patent: 5570073 (1996-10-01), Mueller
patent: 5721523 (1998-02-01), Dorri et al.
Laskaris Evangelos Trifon
Palmo, Jr. Michael Anthony
Donovan Lincoln
Erickson Douglas E.
General Electric Company
Snyder Marvin
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