Electricity: magnetically operated switches – magnets – and electr – Magnets and electromagnets – Magnet structure or material
Patent
1985-04-04
1987-02-17
Harris, George
Electricity: magnetically operated switches, magnets, and electr
Magnets and electromagnets
Magnet structure or material
335304, 324318, H01F 700
Patent
active
046443134
ABSTRACT:
A cylindrical permanent magnet apparatus and electromagnet apparatus used with a nuclear magnetic resonance imaging system are disclosed, in which a magnetic path of ferromagnetic material is arranged around a predetermined Z axis, magnetic field source are arranged at the ends of the magnetic path, a cylindrical magnetic flux conductor is interposed between the magnetic field sources, and an object to be inspected is adapted to be inserted in the cylindrical magnetic flux conductor. A cylindrical magnet apparatus comparatively light in weight which has a homogeneous magnetic field and has magnetic shielding effect and is suitable for routine applications is thus provided.
REFERENCES:
patent: 3205415 (1965-09-01), Seki et al.
patent: 3493904 (1970-02-01), Favereau
patent: 4276529 (1981-06-01), Heinzerling et al.
Harris George
Hitachi , Ltd.
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