Dynamic magnetic information storage or retrieval – Head – Head accessory
Patent
1992-10-13
1994-08-23
Levy, Stuart S.
Dynamic magnetic information storage or retrieval
Head
Head accessory
G11B 5465
Patent
active
053412630
ABSTRACT:
An improved demagnetizer for the magnetic heads of a tape cassette recording and/or reproducing device. The 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 generator of an alternating magnetic field of constant intensity. Power is supplied from a battery to the generator of an alternating magnetic field upon closure of a power switch caused by motion of the magnetic head into the "play" position. Rotation of the intermediate gear causes the magnetic field generator to be cyclically and linearly reciprocated with respect to the head so as to produce a varying magnetic field at the head. A sensor senses when the magnetic field generator has been reciprocated to its farthest point from the head and a circuit counts the number of such sensings. After a predetermined number of counts, the circuit shuts off power to the magnetic field generator when the magnetic field generator is at its farthest point from the head.
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Borchardt Robert L.
McGreevy William T.
Ditmyer Paul J.
Levy Stuart S.
Recoton Corporation
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