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Publication of FR676429ApublicationCriticalpatent/FR676429A/fr
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
FR676429D1929-06-101929-06-10Perfectionnement apporté aux appareils servant à l'enregistrement et à la reproduction des sons, dits phonographes
ExpiredFR676429A
(fr)
Perfectionnements aux appareils enregistreurs et reproducteurs de sons et aux supports servant à l'enregistrement et à la reproduction desdits sons