Television signal disc drive recorder

Details Television signal disc drive recorder Television signal disc drive recorder

1979-06-14

1984-10-16

Canney, Vincent P.

Dynamic magnetic information storage or retrieval

General recording or reproducing

Recording-or erasing-prevention

360 331, G11B 1504, H04N 578

Patent

active

044778473

ABSTRACT:
Apparatus is disclosed for selectively prohibiting certain recording operations in a recording and reproducing machine that has generally random accessibility to a plurality of separate portions of information, such as still images recorded on separate tracks of disc packs of a generally standard computer disc drive. The apparatus specifies a group of the tracks as bulk tracks and a second group as working tracks, with the greater proportion of the total number of tracks comprising the bulk tracks which may be a relatively permanent library of the information recorded thereon. The apparatus generally prohibits erasing or overrecording of bulk tracks, unless an enabling signal is generated, which can be produced from an operator controlled keyswitch.

REFERENCES:
patent: 3340539 (1967-09-01), Sims, Jr.
patent: 3588375 (1971-06-01), Martin
patent: 3824563 (1974-07-01), Lutz

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