FR866331A - Improvements to sound recording devices - Google Patents

Improvements to sound recording devices

Info

Publication number
FR866331A
FR866331A FR866331DA FR866331A FR 866331 A FR866331 A FR 866331A FR 866331D A FR866331D A FR 866331DA FR 866331 A FR866331 A FR 866331A
Authority
FR
France
Prior art keywords
recording devices
sound recording
sound
devices
recording
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
Charles Boutelleau
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 FR866331A publication Critical patent/FR866331A/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
    • G11B33/00—Constructional parts, details or accessories not provided for in the other groups of this subclass
    • G11B33/14—Reducing influence of physical parameters, e.g. temperature change, moisture, dust
    • G11B33/1406—Reducing the influence of the temperature
    • G11B33/144—Reducing the influence of the temperature by detection, control, regulation of the temperature
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B3/00—Recording by mechanical cutting, deforming or pressing, e.g. of grooves or pits; Reproducing by mechanical sensing; Record carriers therefor
FR866331D 1940-03-26 1940-03-26 Improvements to sound recording devices Expired FR866331A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR866331T 1940-03-26

Publications (1)

Publication Number Publication Date
FR866331A true FR866331A (en) 1941-07-28

Family

ID=9344866

Family Applications (1)

Application Number Title Priority Date Filing Date
FR866331D Expired FR866331A (en) 1940-03-26 1940-03-26 Improvements to sound recording devices

Country Status (1)

Country Link
FR (1) FR866331A (en)

Similar Documents

Publication Publication Date Title
FR939303A (en) Improvements to electro-magnetic devices
FR940616A (en) Improvements to speakers and similar devices
FR971517A (en) Improvements to acoustic damping devices
FR852767A (en) Improvements to electro-magnetic sound recording devices
FR866331A (en) Improvements to sound recording devices
FR879597A (en) Mechanical-electric sound reproducer
FR907557A (en) Improvements to cinematographic devices
FR867425A (en) Improvements to gasifiers
FR882793A (en) Improvements to gasifiers
FR865289A (en) Improvements to elastic supports
FR946889A (en) Improvements to phonographic reproduction devices
FR858741A (en) Improvements to sound amplifying devices
FR876756A (en) Improvements to gasifiers
FR920498A (en) Improvements to gasifiers
FR869432A (en) Improvements to ignition devices
FR913827A (en) Improvements to refrigeration devices
FR919403A (en) Improvements made to indicating devices
FR946477A (en) Improvements to cinematographic devices
FR882105A (en) Improvements to radiotomy devices
FR879824A (en) Improvements to sound emitting and reproducing devices
FR867342A (en) Improvements to dust extractors
FR884414A (en) Improvements to sound recordings
FR941620A (en) Improvements to sound producing and receiving devices
FR870404A (en) Improvements to gasifiers
FR869128A (en) Improvements to gasifiers