GB337742A - Improvements in or connected with the reproduction of sound from photographic sound records - Google Patents

Improvements in or connected with the reproduction of sound from photographic sound records

Info

Publication number
GB337742A
GB337742A GB2059029A GB2059029A GB337742A GB 337742 A GB337742 A GB 337742A GB 2059029 A GB2059029 A GB 2059029A GB 2059029 A GB2059029 A GB 2059029A GB 337742 A GB337742 A GB 337742A
Authority
GB
United Kingdom
Prior art keywords
record
sound
varied
varying
during
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
GB2059029A
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 TALKING PICTURES Ltd
Original Assignee
BRITISH TALKING PICTURES 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 TALKING PICTURES Ltd filed Critical BRITISH TALKING PICTURES Ltd
Priority to GB2059029A priority Critical patent/GB337742A/en
Publication of GB337742A publication Critical patent/GB337742A/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

Landscapes

  • Optical Recording Or Reproduction (AREA)

Abstract

337,742. Crowther, F. K., and British Talking Pictures, Ltd. July 4, 1929. Optical records; duplicating.-A sound record is printed from an existing record, and during the printing operation the relative signal strengths are varied, such as by varying the density and / or the width of the racord, so that during reproducing from the new record no alteration in the setting of the usual volume-control devices is necessary. The density of the record may be varied either by varying the intensity of the light used, or by varying the exposure period. When the width of the record is varied, an adjustable mask is used which produces black patches 1, 1, down one or both sides of the record 3 or down the middle of the record. The sound record may be printed by the side of a picture film. The Provisional Specification describes also a modification in which the record to be duplicated with variations is passed through a reproducer and the output therefrom, after passing through a volume-control device, is recorded. A monitoring loud-speaker may be used during the operation.
GB2059029A 1929-07-04 1929-07-04 Improvements in or connected with the reproduction of sound from photographic sound records Expired GB337742A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB2059029A GB337742A (en) 1929-07-04 1929-07-04 Improvements in or connected with the reproduction of sound from photographic sound records

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2059029A GB337742A (en) 1929-07-04 1929-07-04 Improvements in or connected with the reproduction of sound from photographic sound records

Publications (1)

Publication Number Publication Date
GB337742A true GB337742A (en) 1930-11-04

Family

ID=10148425

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2059029A Expired GB337742A (en) 1929-07-04 1929-07-04 Improvements in or connected with the reproduction of sound from photographic sound records

Country Status (1)

Country Link
GB (1) GB337742A (en)

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