FR869737A - Improvements in methods and apparatus for recording and reproducing sound films - Google Patents

Improvements in methods and apparatus for recording and reproducing sound films

Info

Publication number
FR869737A
FR869737A FR869737DA FR869737A FR 869737 A FR869737 A FR 869737A FR 869737D A FR869737D A FR 869737DA FR 869737 A FR869737 A FR 869737A
Authority
FR
France
Prior art keywords
recording
methods
reproducing sound
sound films
films
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
Pierre Henri Charollais
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 FR869737A publication Critical patent/FR869737A/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
    • G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
FR869737D 1941-02-04 1941-02-04 Improvements in methods and apparatus for recording and reproducing sound films Expired FR869737A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR869737T 1941-02-04

Publications (1)

Publication Number Publication Date
FR869737A true FR869737A (en) 1942-02-13

Family

ID=9346588

Family Applications (1)

Application Number Title Priority Date Filing Date
FR869737D Expired FR869737A (en) 1941-02-04 1941-02-04 Improvements in methods and apparatus for recording and reproducing sound films

Country Status (1)

Country Link
FR (1) FR869737A (en)

Similar Documents

Publication Publication Date Title
FR828321A (en) Reproducing and recording head for magnetic sound recording apparatus
FR869737A (en) Improvements in methods and apparatus for recording and reproducing sound films
FR795152A (en) Improvements in methods and apparatus for recording and reproducing sound films
FR900204A (en) Apparatus for reproducing sounds recorded on media in the form of endless tapes
FR754657A (en) Apparatus for recording and reproducing sound
FR1181649A (en) Improvement in magnetic devices for recording and reproducing sounds
FR884610A (en) Improvements in methods and apparatus for sound recording
FR831421A (en) Apparatus for recording sound and for reproducing recording media
FR1066423A (en) Apparatus for recording and reproducing sounds
FR872894A (en) Electroacoustic apparatus for recording or reproducing sound vibrations
FR865089A (en) Audio recording and reproducing apparatus for teaching
FR817783A (en) Further training in sound recording and playback apparatus and methods
FR1239255A (en) Magnetic tape device for recording and reproducing sound
FR852164A (en) Improvements in photoelectric devices for recording and reproducing sound
FR713816A (en) Methods and apparatus for recording and reproducing sound
FR881277A (en) Apparatus for photoelectric sound recording and reproduction
FR823806A (en) Improvements in methods and devices for recording sound films
FR807665A (en) Further training in apparatus for recording or reproducing sound films or the like
FR41990E (en) Method and apparatus for reproducing sound
FR712024A (en) Improvements made to film apparatus for reproducing sound, in particular apparatus for recording and showing talking films
FR760637A (en) Method and device for recording and reproducing sound films
FR760636A (en) Method and device for recording and reproducing sound films
FR821906A (en) Method and apparatus for reproducing sound recordings on films
FR763888A (en) Improvements in apparatus for reproducing sound films
FR670930A (en) Improvements in methods and devices for recording and reproducing sound