Magnetic position marker for a tape recorder using magnetically

Details Magnetic position marker for a tape recorder using magnetically Magnetic position marker for a tape recorder using magnetically

1978-01-23

1978-11-14

Lucas, Jay P.

Recorders

Magnetographic

360 56, G03G 1900, G11B 502

Patent

active

041258444

ABSTRACT:
A cassette tape recorder including a device for making index marks on a strip denoting the position of magnetic tape relative to a magnetic head, the marking strip being on a cassette exterior surface and having magnetically alignable particles by which visible, magnetically erasable marks can be made. The marking device includes a controllable magnet for selectively magnetizing an element made of a soft magnetic material which conducts flux to the strip.
In a magnetic tape cassette adapted for such apparatus a strip with magnetically alignable particles is arranged on at least one major flat wall of the cassette, so as to be readily visible.

REFERENCES:
patent: 2815216 (1957-12-01), Neumann
patent: 2955896 (1960-10-01), Fritzinger
patent: 3169773 (1965-02-01), Redlich
patent: 3608846 (1971-09-01), Pieplow
patent: 3630170 (1971-12-01), Christo
patent: 3683382 (1972-08-01), Ballinger
patent: 3878367 (1975-04-01), Fayling
patent: 3946437 (1976-03-01), Ono

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