Electricity: magnetically operated switches – magnets – and electr – Magnets and electromagnets – Magnet structure or material
Patent
1989-10-02
1993-06-08
Lateef, Marvin M.
Electricity: magnetically operated switches, magnets, and electr
Magnets and electromagnets
Magnet structure or material
335298, 335302, 335306, H01F 100
Patent
active
052183335
ABSTRACT:
A magnetic field generating device for use with an ESR (electronic spin resonance) device essentially comprises a pair of stationary yokes and a pair of permanent magnets respectively attached to the yokes in opposite and spaced apart relationship with each other so that a magnetic field is generated in the space between the permanent magnets. A movable yoke is attached to at least one of the pair of stationary yokes so that the magnetic resistance of the magnetic path formed by the permanent magnets, stationary yokes and movable yoke is varied without changing the size of the space between the permanent magnets thereby generating a continuously changing magnetic field between the permanent magnets.
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patent: 3900814 (1975-08-01), Masuda
patent: 4093912 (1978-06-01), Double et al.
patent: 4636756 (1987-01-01), Ito et al.
patent: 4717979 (1988-01-01), Washisu
patent: 5097240 (1992-03-01), Nakanishi et al.
Lateef Marvin M.
Sumitomo Special Metal Co. Ltd.
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