Edwin Engberg DeceasedSan Francisco, CA
Edwin Engberg Phones & Addresses
San Francisco, CA
Mentions for Edwin Engberg
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Us Patents
Television Signal Disc Drive Recorder
US Patent:
4477847, Oct 16, 1984
Filed:
Jun 14, 1979
Appl. No.:
6/048357
Inventors:
Howard W. Knight - Foster City CA
Edwin W. Engberg - San Carlos CA
Edwin W. Engberg - San Carlos CA
International Classification:
G11B 1504
H04N 578
H04N 578
US Classification:
360 60
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.
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