Electricity: electrical systems and devices – Control circuits for electromagnetic devices – Systems for magnetizing – demagnetizing – or controlling the...
Patent
1987-03-31
1988-03-08
Hix, L. T.
Electricity: electrical systems and devices
Control circuits for electromagnetic devices
Systems for magnetizing, demagnetizing, or controlling the...
335284, H01F 720, H01F 1300
Patent
active
047302305
ABSTRACT:
An apparatus and method for degaussing a magnetic storage medium, such as a reel of magnetic tape, is disclosed. A pair of opposing E-laminations have windings on their respective center legs. A reel of magnetic tape is inserted in the region between the E-laminations, and is rotated. An AC potential is coupled in series across the windings, to obtain a first magnetic field orientation in the region between the E-laminations. The direction of connection of one of the windings of the series arrangement is then reversed, to electrically alter the magnetic field orientation. This provides an effective degaussing of the magnetic tape.
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Dowty RFL Industries Inc.
Hix L. T,.
Novack Martin M.
Porterfield David
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