FR686132A - Improvements to sound recorders and reproducers and to media for recording and reproducing such sounds - Google Patents

Improvements to sound recorders and reproducers and to media for recording and reproducing such sounds

Info

Publication number
FR686132A
FR686132A FR686132DA FR686132A FR 686132 A FR686132 A FR 686132A FR 686132D A FR686132D A FR 686132DA FR 686132 A FR686132 A FR 686132A
Authority
FR
France
Prior art keywords
reproducers
sounds
reproducing
recording
media
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
Other languages
French (fr)
Inventor
Marcel Billon
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 filed Critical
Application granted granted Critical
Publication of FR686132A publication Critical patent/FR686132A/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
    • G11B11/00—Recording on or reproducing from the same record carrier wherein for these two operations the methods are covered by different main groups of groups G11B3/00 - G11B7/00 or by different subgroups of group G11B9/00; Record carriers therefor
    • G11B11/12—Recording on or reproducing from the same record carrier wherein for these two operations the methods are covered by different main groups of groups G11B3/00 - G11B7/00 or by different subgroups of group G11B9/00; Record carriers therefor using recording by optical means
    • G11B11/14—Recording on or reproducing from the same record carrier wherein for these two operations the methods are covered by different main groups of groups G11B3/00 - G11B7/00 or by different subgroups of group G11B9/00; Record carriers therefor using recording by optical means with reproducing by magnetic means
    • 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
    • G11B7/002—Recording, reproducing or erasing systems characterised by the shape or form of the carrier
    • G11B7/003—Recording, reproducing or erasing systems characterised by the shape or form of the carrier with webs, filaments or wires, e.g. belts, spooled tapes or films of quasi-infinite extent
FR686132D 1929-12-05 1929-12-05 Improvements to sound recorders and reproducers and to media for recording and reproducing such sounds Expired FR686132A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR686132T 1929-12-05

Publications (1)

Publication Number Publication Date
FR686132A true FR686132A (en) 1930-07-22

Family

ID=9025375

Family Applications (1)

Application Number Title Priority Date Filing Date
FR686132D Expired FR686132A (en) 1929-12-05 1929-12-05 Improvements to sound recorders and reproducers and to media for recording and reproducing such sounds

Country Status (1)

Country Link
FR (1) FR686132A (en)

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