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US 4,060,845 AGranted
Portable demagnetizer
AssigneeThe Arnold Engineering Company
InventorsPaul E. Bowers, Mukund A. Phadke
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AssigneeThe Arnold Engineering Company
InventorsPaul E. Bowers, Mukund A. Phadke
Estimating the term…
This invention is concerned with a portable demagnetizer which includes a demagnetizing head supported within a hand held housing. Also contained within the housing is a variable control for applying voltages of decreasing step-less magnitude to the demagnetizing head; and means are also provided to apply a step-less alternating current power to the demagnetization head while voltages of decreasing magnitude are applied to the demagnetizing head. The housing is provided with a control means on the outside thereof so that the demagnetizer may be hand held and varied at the same time by a single individual user, particularly because of a minimum of parts and the use of step-less decreasing voltage magnitudes and the use of step-less alternating current power, which is applied to the demagnetizing head. Similar results can be achieved by slowly moving the work away from the alternating field.
A portable demagnetizer comprising a housing, a demagnetizing head in said housing including at least one coil, means for supplying an alternating current potential to said coil, means for varying the magnitude of said alternating current potential from a maximum of the supplied potential to a predetermined minimum whereby to reduce the magnitude of the voltage potential applied to said demagnetization head and thereby reduce the magnitude of the magnetic field of said demagnetization head, and a control circuit for operating said varying means to apply a step-less alternating current power to aid demagnetization head for each variation of said varying means, said control circuit including a power control cord leading to said housing and means supported by said housing for operating said control circuit.
Dependencies are inferred from the claim text.