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Priority to JP9279771UpriorityCriticalpatent/JPS4848612U/ja
Priority to DE19722248543prioritypatent/DE2248543A1/de
Publication of JPS4848612UpublicationCriticalpatent/JPS4848612U/ja
G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
G11B15/00—Driving, starting or stopping record carriers of filamentary or web form; Driving both such record carriers and heads; Guiding such record carriers or containers therefor; Control thereof; Control of operating function
G11B15/18—Driving; Starting; Stopping; Arrangements for control or regulation thereof
G11B15/46—Controlling, regulating, or indicating speed
G11B15/54—Controlling, regulating, or indicating speed by stroboscope; by tachometer