FR647734A - Improvements in sound reproduction in talking cinematographs - Google Patents

Improvements in sound reproduction in talking cinematographs

Info

Publication number
FR647734A
FR647734A FR647734DA FR647734A FR 647734 A FR647734 A FR 647734A FR 647734D A FR647734D A FR 647734DA FR 647734 A FR647734 A FR 647734A
Authority
FR
France
Prior art keywords
cinematographs
talking
sound reproduction
reproduction
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)
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.)
BRITISH CONS INVEST CORP Ltd
Original Assignee
BRITISH CONS INVEST CORP Ltd
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 BRITISH CONS INVEST CORP Ltd filed Critical BRITISH CONS INVEST CORP Ltd
Application granted granted Critical
Publication of FR647734A publication Critical patent/FR647734A/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B21/00—Projectors or projection-type viewers; Accessories therefor
    • G03B21/54—Accessories
    • G03B21/56—Projection screens
    • G03B21/565—Screens allowing free passage of sound

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Overhead Projectors And Projection Screens (AREA)
FR647734D 1926-11-27 1927-11-24 Improvements in sound reproduction in talking cinematographs Expired FR647734A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US128778XA 1926-11-27 1926-11-27

Publications (1)

Publication Number Publication Date
FR647734A true FR647734A (en) 1928-11-30

Family

ID=21757172

Family Applications (1)

Application Number Title Priority Date Filing Date
FR647734D Expired FR647734A (en) 1926-11-27 1927-11-24 Improvements in sound reproduction in talking cinematographs

Country Status (2)

Country Link
CH (1) CH128778A (en)
FR (1) FR647734A (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1016901B1 (en) * 1998-12-29 2005-07-27 Harman Becker Automotive Systems GmbH Image reproduction device with projection screen for back-projection and sound emission
DE20114680U1 (en) * 2001-09-06 2003-01-16 G & B Pronova Gmbh Projection screen for moving or still pictures, comprises glass pane with sound generator forming glass loudspeaker

Also Published As

Publication number Publication date
CH128778A (en) 1928-11-16

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