Electricity: magnetically operated switches – magnets – and electr – Magnets and electromagnets – For magnetizing or demagnetizing
Patent
1986-05-07
1987-11-10
Harris, George
Electricity: magnetically operated switches, magnets, and electr
Magnets and electromagnets
For magnetizing or demagnetizing
335301, 335304, H01F 1300
Patent
active
047060573
ABSTRACT:
A magnet of permanent magnet material for use in a nuclear spin tomograph has a longitudinally extending cavity for receiving a patent, the cavity and the outer contour of the magnet being substantially rectangular. The magnet comprises simple prismatic parts which are assembled unmagnetized. Upon assembly, the magnet is magnetized so that an approximately homogeneous magnetic field prevails in the cavity and the space outside the magnet is approximately free of fields. Magnetically soft plates are disposed on the inside surfaces of two horizontal legs of the magnet.
REFERENCES:
patent: 3927397 (1975-12-01), Chow et al.
patent: 4614930 (1986-09-01), Hickey et al.
R. E. Jones, Jr., IBM Technical Disclosure Bulletin, "Directionally Homogeneous Magnets for Vacuum-Deposition Apparatus", vol. 19, No. 5, pp. 1856-1857, Oct. 1976.
Harris George
Siemens Aktiengesellschaft
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