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Publication of FR487804ApublicationCriticalpatent/FR487804A/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
FR487804D1917-11-231917-11-23Dispositif pour la commande électrique des phonographes
ExpiredFR487804A
(fr)