Dynamic magnetic information storage or retrieval – Record transport with head stationary during transducing – Drum record
Patent
1975-06-23
1976-11-30
Tupper, Robert S.
Dynamic magnetic information storage or retrieval
Record transport with head stationary during transducing
Drum record
360107, 360130, G11B 2124, G11B 556, G11B 2104, G11B 552
Patent
active
039953173
ABSTRACT:
A helical scan recording and playback apparatus wherein magnetic video tape forms a helix about the peripheral surfaces of two coaxial drums which define an annular gap for magnetic heads which orbit in a chamber between the drums and engage inclined tracks at the inner side of the helix. The heads are mounted on a disk which is rotatable on a sleeve surrounding with clearance a shaft for the drums and having an internal protuberance which is tiltable with respect to the periphery of the shaft by a rod extending through an opening in the flange of one of the drums. The inclination of the plane of orbital movement of the heads relative to the central symmetry plane of the gap is changed when the speed of lengthwise movement of tape during playback deviates from the speed of lengthwise movement of tape during recording.
REFERENCES:
patent: 3235670 (1966-02-01), Kihara
patent: 3375331 (1968-03-01), Okazaki et al.
patent: 3435154 (1969-03-01), Kihara
patent: 3567869 (1971-03-01), Hirota et al.
patent: 3697676 (1972-10-01), Protas
Price, "Video Tape Recorder with Oscillating Head", IBM Tech. Disc. Bull. vol. 12, No. 1, June 1969, p. 33.
Grundig E.M.V. Elektro-Mechanische Versuchsanstalt Max Grundig
Striker Michael J.
Tupper Robert S.
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