High energy degausser

Details High energy degausser High energy degausser

1982-11-05

1986-11-04

Gellner, Michael L.

Electricity: electrical systems and devices

Control circuits for electromagnetic devices

Systems for magnetizing, demagnetizing, or controlling the...

361155, 361156, 361267, H01F 1300

Patent

active

046212990

ABSTRACT:
A magnetic material degausser in which the material to be degaussed is placed within the center of a degaussing coil. A capacitive discharge system is employed for energizing the degaussing coil. The capacitor is repeatedly discharged through the coil in such a way that for at least a portion of the degaussing cycle, the energy applied to the coil decreases with each energization. The magnetic material may be rotated within the coil as the degaussing cycle progresses. In one embodiment of the present invention, the energy discharged from the capacitor first increases and then decreases during the degaussing cycle with each energization of the coil. The rotational speed of the magnetic material within the coil may be related to the frequency at which the capacitor is discharged.

REFERENCES:
patent: 2825854 (1958-03-01), Littwin
patent: 3143689 (1964-08-01), Hall
patent: 3164753 (1965-01-01), Schroeder
patent: 3321586 (1967-05-01), Krones
patent: 3638074 (1972-01-01), Inouye
patent: 3895270 (1975-07-01), Maddox
patent: 3938011 (1976-02-01), Littwin
patent: 4142221 (1979-02-01), Jenkins et al.
patent: 4346426 (1982-08-01), Baumann et al.
patent: 4402032 (1983-08-01), Wilterdink
patent: 4462059 (1984-07-01), Yamagami et al.

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