GB379737A - Improved method and apparatus for recording and reproducing moving pictures and accompanying sound - Google Patents

Improved method and apparatus for recording and reproducing moving pictures and accompanying sound

Info

Publication number
GB379737A
GB379737A GB16242/31A GB1624231A GB379737A GB 379737 A GB379737 A GB 379737A GB 16242/31 A GB16242/31 A GB 16242/31A GB 1624231 A GB1624231 A GB 1624231A GB 379737 A GB379737 A GB 379737A
Authority
GB
United Kingdom
Prior art keywords
sound
film
picture
recording
reproduced
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
GB16242/31A
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.)
Electrical Research Products Inc
Original Assignee
Electrical Research Products Inc
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
Priority to US379737XA priority Critical
Application filed by Electrical Research Products Inc filed Critical Electrical Research Products Inc
Publication of GB379737A publication Critical patent/GB379737A/en
Expired legal-status Critical Current

Links

Classifications

    • GPHYSICS
    • G03PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03BAPPARATUS 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
    • G03B31/00Associated working of cameras or projectors with sound-recording or sound-reproducing means

Abstract

379,737. Combined sound and picture records ; recording and reproducing. ELECTRICAL RESEARCH PRODUCTS, Inc., 195, Broadway, New York, U.S.A.- (Assignees of Coffman, J. W.; 33, 86th Street, Jackson Heights, New York, U.S.A.) June 4,1931, No. 16242. Convention date, June9,1930. [Classes 13 and 40 (ii).] Pictures and accompanying sound are recorded upon or reproduced from a film by passing the film successively before a picture-recording or projecting lens system and a sound-recording or reproducing means, and in delaying the transmission of the sound waves or the electric currents corresponding thereto, so that the picture and its accompanying sound are recorded in line laterally on the film or are reproduced simultaneously. As applied to a recording system, Fig. 1, the sounds impinging upon a microphone 10 are amplified and passed through a conduit 14 of an acoustical delay device 12, after which they are reconverted into electrical oscillations which are amplified and control the intensity of a lamp 18. The light from the lamp 18 records the sounds on a film 22 within a combined picture and sound-recording camera 20, the pictures being photographed through a lens system 27. The film passes from the picture lens system to the sound recorder and the delay period in the transmission of the sound is controlled by regulating the length of the conduit 14 to compensate for the time taken by the film in passing from the picture gate to the sound recorder, so that the pictures and sound are recorded in line laterally on the film. A combined sound and picture film so recorded is reproduced as shown in Fig. 2 by being passed first through a sound reproducer 40 and then through a picture projector 50, the reproduced sounds being transmitted through the conduit 63 of a delay device 61. The delay device 61 is adjusted to compensate for the time taken by the film to travel from the sound reproducer to the picture gate, so that the pictures and accompanying sound are reproduced simultaneously. Fig. 3 illustrates a record film produced by the method of Fig. 1. Cutting and splicing can be effected in a straight line across the film. An electrical delay circuit for the sound waves may be employed instead of a mechanical delay system.
GB16242/31A 1930-06-09 1931-06-04 Improved method and apparatus for recording and reproducing moving pictures and accompanying sound Expired GB379737A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US379737XA true 1930-06-09 1930-06-09

Publications (1)

Publication Number Publication Date
GB379737A true GB379737A (en) 1932-09-05

Family

ID=21897375

Family Applications (1)

Application Number Title Priority Date Filing Date
GB16242/31A Expired GB379737A (en) 1930-06-09 1931-06-04 Improved method and apparatus for recording and reproducing moving pictures and accompanying sound

Country Status (1)

Country Link
GB (1) GB379737A (en)

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