Apparatus for demagnetizing the magnetic head of a cassette tape

Details Apparatus for demagnetizing the magnetic head of a cassette tape Apparatus for demagnetizing the magnetic head of a cassette tape

1988-02-05

1989-06-27

Wolff, John H.

Dynamic magnetic information storage or retrieval

Head

Head accessory

G11B 5465

Patent

active

048435090

ABSTRACT:
A simple and inexpensive demagnetizer for the magnetic heads of a tape cassette recording and/or reproducing device includes an intermediate gear which is rotated by either one of two hub gears engaging respective drive spindles of the recording and/or reproducing device. A push-pull rod has one end pivotally connected to an outer radial position of the intermediate gear and another end pivotally connected to a source of alternating magnetic field of constant intensity. Rotation of the intermediate gear causes the magnetic field generator to be cylically and linearly reciprocated with respect to the head so as to produce a decreasing magnetic field at the head.

REFERENCES:
patent: 3647990 (1972-03-01), Eul, Jr. et al.
patent: 3810230 (1974-05-01), Orlowski et al.
patent: 4135219 (1979-01-01), Yoshizawa et al.
patent: 4183070 (1980-01-01), Fujita
patent: 4224649 (1980-09-01), Alexandrovich, Sr.
patent: 4378582 (1983-03-01), Maier et al.

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