Demagnetizing device having an oscillating permanent magnet

Details Demagnetizing device having an oscillating permanent magnet Demagnetizing device having an oscillating permanent magnet

1987-10-09

1989-07-25

Wolff, John H.

Dynamic magnetic information storage or retrieval

Head

Head accessory

G11B 546

Patent

active

048519456

ABSTRACT:
A demagnetizing device for demagnetizing a sound head in a cassette tape recorder, comprises a cassette type housing. A carrier member pivotal in the housing carries a permanent magnet which oscillates with the carrier member sidewardly across an opening in the housing adjacent the sound head of the cassette tape recorder to demagnetize the sound head. A cam driven by a spindle of the cassette tape recorder acting on a follower drives the carrier member with oscillating movement.

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patent: 4378582 (1983-03-01), Maier et al.
patent: 4586099 (1986-04-01), Suzuki et al.
patent: 4594629 (1986-06-01), d'Arc
patent: 4713712 (1987-12-01), Chou

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