FR729931A - Improvements to recording and projection systems for sound films - Google Patents

Improvements to recording and projection systems for sound films

Info

Publication number
FR729931A
FR729931A FR729931DA FR729931A FR 729931 A FR729931 A FR 729931A FR 729931D A FR729931D A FR 729931DA FR 729931 A FR729931 A FR 729931A
Authority
FR
France
Prior art keywords
recording
projection systems
sound films
films
sound
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
Joseph Bethenod
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 FR729931A publication Critical patent/FR729931A/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
    • 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
    • G11B15/26—Driving record carriers by members acting directly or indirectly thereon
    • G11B15/34—Driving record carriers by members acting directly or indirectly thereon through non-slip drive means, e.g. sprocket
FR729931D 1931-03-26 1931-03-26 Improvements to recording and projection systems for sound films Expired FR729931A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR729931T 1931-03-26

Publications (1)

Publication Number Publication Date
FR729931A true FR729931A (en) 1932-08-03

Family

ID=9112745

Family Applications (1)

Application Number Title Priority Date Filing Date
FR729931D Expired FR729931A (en) 1931-03-26 1931-03-26 Improvements to recording and projection systems for sound films

Country Status (1)

Country Link
FR (1) FR729931A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE966125C (en) * 1938-03-23 1957-07-11 Film guide for devices with a flywheel dragged over a smooth roller and e

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE966125C (en) * 1938-03-23 1957-07-11 Film guide for devices with a flywheel dragged over a smooth roller and e

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