Demagnetizing apparatus

Details Demagnetizing apparatus Demagnetizing apparatus

1981-12-21

1983-03-29

Moose, Jr., Harry E.

Electricity: electrical systems and devices

Demagnetizing systems and processes

335284, 360128, 361151, G11B 546

Patent

active

043785824

ABSTRACT:
A demagnetizing device for a cassette tape player includes a cassette shell which defines a generally oval-shaped guide track extending around the interior of the shell. A magnet assembly is provided with shafts which fit within the guide track such that the magnet assembly is free to rotate within the guide track and to translate along the length of the guide track. The magnet assembly is rotated by a drive belt which in turn is driven by two hubs rotatably mounted in the cassette shell. An automatic shutoff lever is disclosed which acts automatically to shutoff a tape player equipped with automatic shutoff features when the magnet assembly reaches one of two predetermined positions on the guide track. By properly positioning the guide track, the single magnet assembly can be used to demagnetize multiple components of a tape player distributed around the cassette shell. For example, the single magnet assembly can be used to demagnetize two capstans and a tape head in a single operation.

REFERENCES:
patent: 3647990 (1972-03-01), Eul, Jr. et al.
patent: 3655924 (1972-04-01), Puskas
patent: 3810230 (1974-05-01), Orlowski et al.
patent: 3958273 (1976-05-01), Alexandrovich, Sr. et al.
patent: 4135219 (1979-01-01), Yoshizawa et al.

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