Electricity: electrical systems and devices – Control circuits for electromagnetic devices – Systems for magnetizing – demagnetizing – or controlling the...
Patent
1981-05-26
1983-06-14
Rubinson, G. Z.
Electricity: electrical systems and devices
Control circuits for electromagnetic devices
Systems for magnetizing, demagnetizing, or controlling the...
H01F 1300
Patent
active
043886663
ABSTRACT:
A demagnetizer for removing residual magnetism in vehicles includes a single coil which is adapted to surround a portion or the whole of the body of a vehicle. A direct current and alternating current are supplied to the single coil simultaneously to produce a d.c. magnetic field and an a.c. magnetic field. The direction and magnitude of the d.c. magnetic field are so arranged, that the d.c. magnetic field cancels the external magnetic field. The magnitude of the a.c. magnetic field is varied within a predetermined range periodically to remove the residual magnetism.
REFERENCES:
patent: 3110282 (1963-11-01), Foerster
"Combating Magnetic Mines", Electrical Review, Sep. 21, 1945, p. 412.
Kuno Akira
Matsumoto Muneaki
Numata Koji
Nippon Soken Inc.
Rubinson G. Z.
Schroeder L. C.
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