FR576486A - Improvement in phonographs - Google Patents

Improvement in phonographs

Info

Publication number
FR576486A
FR576486A FR576486DA FR576486A FR 576486 A FR576486 A FR 576486A FR 576486D A FR576486D A FR 576486DA FR 576486 A FR576486 A FR 576486A
Authority
FR
France
Prior art keywords
phonographs
improvement
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
Harold Alfred Rogers
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 FR576486A publication Critical patent/FR576486A/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
    • G11B19/00—Driving, starting, stopping record carriers not specifically of filamentary or web form, or of supports therefor; Control thereof; Control of operating function ; Driving both disc and head
    • G11B19/20—Driving; Starting; Stopping; Control thereof
    • G11B19/26—Speed-changing arrangements; Reversing arrangements; Drive-transfer means therefor
    • G11B19/265—Friction wheel drive
FR576486D 1923-01-31 1924-01-30 Improvement in phonographs Expired FR576486A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB576486X 1923-01-31

Publications (1)

Publication Number Publication Date
FR576486A true FR576486A (en) 1924-08-21

Family

ID=10479683

Family Applications (1)

Application Number Title Priority Date Filing Date
FR576486D Expired FR576486A (en) 1923-01-31 1924-01-30 Improvement in phonographs

Country Status (1)

Country Link
FR (1) FR576486A (en)

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