Dynamic information storage or retrieval – Specific detail of information handling portion of system – Radiation beam modification of or by storage medium
Patent
1979-12-13
1982-02-16
Faber, Alan
Dynamic information storage or retrieval
Specific detail of information handling portion of system
Radiation beam modification of or by storage medium
369115, 360102, 360103, G11B 1732
Patent
active
043162789
ABSTRACT:
A system for reading or recording indicia on a flexible disc. The disc is rotated between a pair of surfaces, one of which is flat and the other of which is elongated and curved. The opposed flat and curved elongated surfaces stabilize the disc at a precise point therebetween to enable recording or reading of the indicia thereon. The flexible disc may be to have indicia optically carried thereon. In such applications optical means is disposed in the surfaces defining means positioned on opposite sides of the disc to record or read the optical indicia. The optical means mounted in the curved surface is offset slightly in the direction of rotation of the disc. The means defining the flat and curved surfaces are radially translated with respect to the rotating disc within a radial slot provided in a base plate over which the disc rotates. Thus, by radially translating the surfaces containing the optical means with respect to the disc, the desired indicia can be recorded or detected.
REFERENCES:
patent: 2863004 (1958-12-01), Maclay
patent: 3166997 (1965-01-01), Barcia
patent: 3818506 (1974-06-01), Kelch
patent: 3893185 (1975-07-01), Ring
patent: 3927252 (1975-12-01), Polley
patent: 3980810 (1976-09-01), Tinet
patent: 4003091 (1977-01-01), Wright
Faber Alan
McDonnell Douglas Corporation
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