Electricity: electrical systems and devices – Control circuits for electromagnetic devices – Systems for magnetizing – demagnetizing – or controlling the...
Patent
1983-08-29
1989-04-25
Gellner, Michael L.
Electricity: electrical systems and devices
Control circuits for electromagnetic devices
Systems for magnetizing, demagnetizing, or controlling the...
H01F 1300
Patent
active
048253316
ABSTRACT:
A unit including a conveyor belt for carrying the tapes to be degaussed, wound on reels, past degaussing coils. The coils are arranged respectively below and above the path of the tapes, spaced along the path of the tapes, and oriented with the magnetic fields positioned at 90.degree. angle to each other and both at 45.degree. angle to the direction of movement of the conveyor. Booster coils are provided for selectively applying lesser and greater voltages to the degaussing coils. Cooling fans direct cooling air against the degaussing coils, and in both of opposite directions on each coil. Safety features include interruption of the operation upon excessive heat of the degaussing coils, too great or too little current to the coils, or too great or too low voltage applied from the main source.
REFERENCES:
patent: 3218522 (1965-11-01), Littwin
patent: 3579053 (1971-05-01), Littwin
patent: 3885200 (1975-05-01), Burkle
patent: 3938011 (1976-02-01), Littwin
patent: 4502100 (1985-02-01), Greenspan et al.
Electro-Matic Products Co.
Gallagher Paul H.
Gellner Michael L.
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