GB849488A - Improvements relating to rotatable storage surfaces - Google Patents

Improvements relating to rotatable storage surfaces

Info

Publication number
GB849488A
GB849488A GB3811157A GB3811157A GB849488A GB 849488 A GB849488 A GB 849488A GB 3811157 A GB3811157 A GB 3811157A GB 3811157 A GB3811157 A GB 3811157A GB 849488 A GB849488 A GB 849488A
Authority
GB
United Kingdom
Prior art keywords
disc
information
shaft
chamber
plates
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
GB3811157A
Inventor
Hans Christian Jensen
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Ferranti International PLC
Original Assignee
Ferranti PLC
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Ferranti PLC filed Critical Ferranti PLC
Priority to GB3811157A priority Critical patent/GB849488A/en
Publication of GB849488A publication Critical patent/GB849488A/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B17/00—Guiding record carriers not specifically of filamentary or web form, or of supports therefor
    • G11B17/32—Maintaining desired spacing between record carrier and head, e.g. by fluid-dynamic spacing
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B25/00—Apparatus characterised by the shape of record carrier employed but not specific to the method of recording or reproducing, e.g. dictating apparatus; Combinations of such apparatus
    • G11B25/04—Apparatus characterised by the shape of record carrier employed but not specific to the method of recording or reproducing, e.g. dictating apparatus; Combinations of such apparatus using flat record carriers, e.g. disc, card
    • G11B25/043—Apparatus characterised by the shape of record carrier employed but not specific to the method of recording or reproducing, e.g. dictating apparatus; Combinations of such apparatus using flat record carriers, e.g. disc, card using rotating discs
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
    • G11B7/08—Disposition or mounting of heads or light sources relatively to record carriers

Landscapes

  • Supporting Of Heads In Record-Carrier Devices (AREA)

Abstract

849,488. Electric digital - data - storage apparatus. FERRANTI Ltd. Dec. 7, 1957, No. 38111/57. Class 106 (1). [Also in Group XX] A digital data store comprises a rotatable flexible disc mounted on a driving shaft in a chamber having opposed plane surfaces in close parallel spaced relationship with the disk, means for recording information on and/or reading information from a plane storage surface of the disc, inlets in the walls of the chamber adjacent the shaft and outlets adjacent the periphery of the disc for air or other gas, the arrangement being such that at high speeds of rotation the disc assumes a position exactly midway between the opposed surfaces. As shown, a magnetic store for a digital computer comprises a disc 20, e.g. of paper or plastic film, axially slidable on a square motor-driven shaft 11 in a chamber 19 formed between plates 13, 14. Air may enter through circular apertures 24 in the plates to be expelled via the peripheral gaps 25. Magnetic reading and/or recording heads 22 are embedded in plastic in the plate 13. As the shaft is rotated at high speed the disc assumes a position exactly midway between the two surfaces 13, 14. In another embodiment (Figs. 3 and 4, not shown) information is recorded on one side of the disc which is sufficiently thin to enable the information to be read out from the other side. In another embodiment (Figs. 5 and 6, not shown) the storage surface is photosensitive (see Group XX).
GB3811157A 1957-12-07 1957-12-07 Improvements relating to rotatable storage surfaces Expired GB849488A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB3811157A GB849488A (en) 1957-12-07 1957-12-07 Improvements relating to rotatable storage surfaces

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB3811157A GB849488A (en) 1957-12-07 1957-12-07 Improvements relating to rotatable storage surfaces

Publications (1)

Publication Number Publication Date
GB849488A true GB849488A (en) 1960-09-28

Family

ID=10401256

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3811157A Expired GB849488A (en) 1957-12-07 1957-12-07 Improvements relating to rotatable storage surfaces

Country Status (1)

Country Link
GB (1) GB849488A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3846835A (en) * 1973-05-29 1974-11-05 Sperry Rand Corp Clean air system for magnetic storage disk pack
EP0125479A1 (en) * 1980-06-18 1984-11-21 EASTMAN KODAK COMPANY (a New Jersey corporation) Flexible optical disc

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3846835A (en) * 1973-05-29 1974-11-05 Sperry Rand Corp Clean air system for magnetic storage disk pack
EP0125479A1 (en) * 1980-06-18 1984-11-21 EASTMAN KODAK COMPANY (a New Jersey corporation) Flexible optical disc

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