Optical floppy disc data storage and retrieval techniques

Details Optical floppy disc data storage and retrieval techniques Optical floppy disc data storage and retrieval techniques

1979-09-10

1982-10-05

Shaw, Gareth D.

Recorders

Record receivers and/or driving means therefor

Disc

369272, G01D 1524

Patent

active

043530770

ABSTRACT:
An optical floppy disc constructed of microfilm, thermoplastic or paper and bears digital and/or graphic information. Digital information may be stored in radial lines each of which comprises the digital information to be retrieved and line addresses at the end of a line or dispersed within a line. Digital information may also be stored in a plurality of coaxial circular tracks and be retrieved by addressing the track and portion of the track containing the desired information. Information retrieval systems, both continuously rotating and start-stop systems are provided for reading the various types of discs. Of particular importance is the use of a disc as an easily up-dateable catalog.

REFERENCES:
patent: 3404224 (1968-10-01), Revelo et al.
patent: 3781809 (1973-12-01), Murakoshi et al.
patent: 3931457 (1976-01-01), Mes
patent: 3939302 (1976-02-01), Kihara
patent: 4168889 (1979-09-01), Norris
patent: 4189783 (1980-02-01), Brodie et al.
patent: 4209804 (1980-06-01), Dil

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