Dynamic magnetic information storage or retrieval – Record transport with head stationary during transducing – Drum record
Patent
1990-04-12
1992-02-04
Tupper, Robert S.
Dynamic magnetic information storage or retrieval
Record transport with head stationary during transducing
Drum record
G11B 552, G11B 2104
Patent
active
050863614
ABSTRACT:
A rotary head drum for a video tape recorder includes a stationary lower drum member having a base portion and inner and outer cylindrical portions extending generally upwardly from the base portion to define an internal cavity therebetween. A rotary assembly is rotatably mounted on a rotor shaft coaxial with the lower drum member and has at least one rotary magnetic head mounted thereto for recording digital signals on and reproducing the signals from a magnetic tape wrapped about the drum. A motor for driving the rotary heads, a rotation detector or tach generator for detecting the rotation of the motor, and a multi-channel rotary transformer for transferring digital signals to and from the rotary head are all housed in the cylindrical internal cavity surrounded by the base portion, and inner and outer cylindrical portions of the lower drum member which thereby reduces the overall axial height of the video tape recorder.
REFERENCES:
patent: 4408239 (1983-10-01), Ushiro
patent: 4654738 (1987-03-01), Kato et al.
patent: 4706143 (1987-11-01), Asada et al.
Kanaguchi Masahiro
Kawada Hideaki
Sugiyama Yoshiaki
Frommer William S.
Sinderbrand Alvin
Sony Corporation
Tupper Robert S.
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