Optical disc and disc drive mechanism

Details Optical disc and disc drive mechanism Optical disc and disc drive mechanism

1981-03-23

1985-08-13

Faber, Alan

Dynamic information storage or retrieval

Specific detail of information handling portion of system

Radiation beam modification of or by storage medium

360133, 369291, 369266, 369275, 310103, 464 29, G11B 700, G11B 2302

Patent

active

045354340

ABSTRACT:
An optical disc assembly includes an optical disc on which signals are recorded, and from which the signals are optically reproduced; a closed casing rotatably containing the optical disc, and having a transparent portion; and a rotor fixed at the center of the optical disc and magnetically coupleable with an external rotating magnetic field to be rotated therewith. An optical disc assembly includes a rotating magnetic field generating device arranged outside of the closed casing and concentrically with the optical disc to drive the latter without contact.

REFERENCES:
patent: 2485848 (1949-10-01), Sharp
patent: 3183385 (1965-05-01), Gabriel
patent: 3430966 (1969-03-01), Gregg
patent: 3943275 (1976-03-01), Jebens
patent: 4002826 (1977-01-01), Semenschot
patent: 4074282 (1978-02-01), Balos
Circuits, Devices, and Systems, by Smith .COPYRGT.1966, pp. 516.518.
Japanese Patent Abstract, 55-4710(A), Fujita, 1/14/80.
"Drive for Hermetically Sealed Disk File", by Treseder, IBM Tech. Disc. Bul., vol. 22, No. 3, Aug. 1979, pp. 1181, 1182.

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