Metal working – Method of mechanical manufacture – Assembling or joining
Patent
1980-03-25
1982-11-16
Crane, Daniel C.
Metal working
Method of mechanical manufacture
Assembling or joining
29407, 361149, 361267, B23P 1500, H01F 4100
Patent
active
043588867
ABSTRACT:
A method for demagnetizing an automobile is disclosed in which the terrestrial magnetism is detected by a direction-detecting sensor and the running direction of the automobile is indicated in response to a signal produced from the direction-detecting sensor. The distortion of the magnetic field caused by the permanent magnetism of the magnetic materials of the whole body of the automobile is erased by placing the automobile in an AC magnetic field which gradually increases from zero to a predetermined intensity and then gradually decreases to zero, and thereafter the direction-detecting sensor is mounted at the magnetic center of the automobile.
REFERENCES:
patent: 250273 (1881-11-01), Maxim
patent: 1867812 (1932-07-01), Dodd et al.
patent: 2355940 (1944-08-01), Zuschlng
patent: 2460684 (1949-02-01), Farrow
patent: 2481392 (1949-09-01), Camras
Michel, Nicholas B., "Shipboard Degaussing Installations for Protection Against Magnetic Mines" from AIEE Technical Paper 48-227, Aug. 1948.
Kuno Akira
Matsumoto Muneaki
Numata Koji
Crane Daniel C.
Nippon Soken Inc.
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