FR664767A - Improvements to recording and reproducing devices of vibrations - Google Patents

Improvements to recording and reproducing devices of vibrations

Info

Publication number
FR664767A
FR664767A FR664767DA FR664767A FR 664767 A FR664767 A FR 664767A FR 664767D A FR664767D A FR 664767DA FR 664767 A FR664767 A FR 664767A
Authority
FR
France
Prior art keywords
vibrations
recording
reproducing devices
reproducing
devices
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)
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Compagnie Francaise Thomson Houston SA
Original Assignee
Compagnie Francaise Thomson Houston SA
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 by Compagnie Francaise Thomson Houston SA filed Critical Compagnie Francaise Thomson Houston SA
Application granted granted Critical
Publication of FR664767A publication Critical patent/FR664767A/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
FR664767D 1927-11-28 1928-11-28 Improvements to recording and reproducing devices of vibrations Expired FR664767A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US664767XA 1927-11-28 1927-11-28

Publications (1)

Publication Number Publication Date
FR664767A true FR664767A (en) 1929-09-07

Family

ID=22069737

Family Applications (1)

Application Number Title Priority Date Filing Date
FR664767D Expired FR664767A (en) 1927-11-28 1928-11-28 Improvements to recording and reproducing devices of vibrations

Country Status (1)

Country Link
FR (1) FR664767A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE764336C (en) * 1938-03-01 1952-07-03 Klangfilm G M B H Illumination device for the gap of a sound film device
DE870481C (en) * 1931-08-31 1953-03-12 Western Electric Co Method and device for producing a sound film recording in intensity writing

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE870481C (en) * 1931-08-31 1953-03-12 Western Electric Co Method and device for producing a sound film recording in intensity writing
DE764336C (en) * 1938-03-01 1952-07-03 Klangfilm G M B H Illumination device for the gap of a sound film device

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