Electricity: magnetically operated switches – magnets – and electr – Magnets and electromagnets – Superconductive type
Patent
1997-08-04
1999-08-17
Donovan, Lincoln
Electricity: magnetically operated switches, magnets, and electr
Magnets and electromagnets
Superconductive type
324319, 335299, 600421, 600422, H01F 508
Patent
active
059399627
ABSTRACT:
Annular portions are arranged on mutually confronting surfaces at circumferential edge portions of low-temperature containers, the annular portions forming annular containing portions whose cross section is rectangular. Not only a side coil among a group of coils forming a collective coil body is disposed inside the containing portion, but also a gradient magnetic field unit, a radio-frequency transmission coil, and a reception coil are disposed inside a recessed portion so as to be integrated with one another into a single body, the recessed portion being formed so as to be surrounded by the corresponding annular portion. The side coil supplies more than half a designed magnetomotive force. Since a distance J of the mutually confronting low-temperature containers, i.e., the distance between the mutually confronting surfaces of the side coils can be reduced by a distance corresponding to the projection of the projected portions, not only the designed magnetomotive force can be reduced, but also the apparatus can be downsized and inexpensive.
REFERENCES:
patent: 4766378 (1988-08-01), Danby et al.
patent: 4829252 (1989-05-01), Kaufman
patent: 5153546 (1992-10-01), Laskaris
patent: 5361054 (1994-11-01), Knuttel
patent: 5386191 (1995-01-01), McCarten et al.
patent: 5610521 (1997-03-01), Zou et al.
Tahara Yasuyuki
Takeshima Hirotaka
Tanabe Hajime
Barrera Raymond
Donovan Lincoln
Hitachi Medical Corporation
Mitsubishi Denki & Kabushiki Kaisha
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