GB484038A - Improvements in or relating to methods of and apparatus for reproducing or re-recording recorded sound - Google Patents

Improvements in or relating to methods of and apparatus for reproducing or re-recording recorded sound

Info

Publication number
GB484038A
GB484038A GB14534/37A GB1453437A GB484038A GB 484038 A GB484038 A GB 484038A GB 14534/37 A GB14534/37 A GB 14534/37A GB 1453437 A GB1453437 A GB 1453437A GB 484038 A GB484038 A GB 484038A
Authority
GB
United Kingdom
Prior art keywords
film
length
reproducing
recording
light
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
GB14534/37A
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 OZAPHANE Ltd
Original Assignee
BRITISH OZAPHANE 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 OZAPHANE Ltd filed Critical BRITISH OZAPHANE Ltd
Publication of GB484038A publication Critical patent/GB484038A/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

484,038. Sound reproducing and rerecording. BRITISH OZAPHANE, Ltd. May 25, 1937, No. 14534. Convention date, May 29, 1936. [Class 40 (ii)] " Noiseless " reproduction or re-recording is obtained from a " non-noiseless " variable area film record by projecting on the film 14 from a source 1, a beam of light illuminating a length 3, 4 of the film at least equal to one wave length of the lowest frequency to be reproduced or re-recorded, reflecting the light back, for example by a concave mirror 6, to a, second equal length 3<1>, 4<1> of the film adjacent the first length and oppositely directed, diffusing the light between the mirror and the second length of film in the longitudinal direction only for example by a diffraction grating 8, and finally throwing the beam by an objective device 9 on to a photo-electric cell 13 for reproducing or re-recording the sound. If the film is an opaque reflecting one, all the optical devices are on the same side of it. A film having a track of uniform width can also be used, the two edges of the track being treated separately and their effects combined in push-pull fashion.
GB14534/37A 1936-05-29 1937-05-25 Improvements in or relating to methods of and apparatus for reproducing or re-recording recorded sound Expired GB484038A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR484038X 1936-05-29

Publications (1)

Publication Number Publication Date
GB484038A true GB484038A (en) 1938-04-29

Family

ID=8903790

Family Applications (1)

Application Number Title Priority Date Filing Date
GB14534/37A Expired GB484038A (en) 1936-05-29 1937-05-25 Improvements in or relating to methods of and apparatus for reproducing or re-recording recorded sound

Country Status (1)

Country Link
GB (1) GB484038A (en)

Similar Documents

Publication Publication Date Title
GB484038A (en) Improvements in or relating to methods of and apparatus for reproducing or re-recording recorded sound
US2311159A (en) Production of sound records
GB496974A (en) Improvements in or relating to apparatus for feeding endless films
US2031835A (en) Recording and reproduction of electrical impulses
US2258993A (en) Sound recording apparatus
US1942066A (en) Means and method for recording and reproducing photographic sound records
US2093423A (en) Sound recording and reproducing apparatus
US2517659A (en) Spectral photographic sound apparatus and record
US1580762A (en) Reproduction of speaking films
US2235513A (en) Sound recording system
GB393610A (en) Improvements in and relating to the recording of sound on films
US2039173A (en) Sound record
GB501043A (en) Improvements in or relating to sound recording
US2143400A (en) Reproducing system
GB428623A (en) Improvements in or relating to photographic recording of sounds on to a film
US2124150A (en) Method and device for recording sound
GB417644A (en) Improvements in or relating to recording sounds
GB406872A (en) Method and apparatus for sound recording and reproducing
GB545465A (en) Improvements in or relating to the recording of alternating current impulses
GB351772A (en) Apparatus for the reproduction of sound-films
GB379765A (en) Improvements in or relating to motion picture apparatus
GB477252A (en) Improvements in or relating to systems for reproducing film sound records
GB360903A (en) Improvements in or relating to the recording and reproducing of sound
GB460643A (en) Improvements relating to sound recording devices
GB434376A (en) Improvements in the photographic recording of sound impulses