GB504656A - Improvements in or relating to film sound recording systems - Google Patents

Improvements in or relating to film sound recording systems

Info

Publication number
GB504656A
GB504656A GB3496837A GB3496837A GB504656A GB 504656 A GB504656 A GB 504656A GB 3496837 A GB3496837 A GB 3496837A GB 3496837 A GB3496837 A GB 3496837A GB 504656 A GB504656 A GB 504656A
Authority
GB
United Kingdom
Prior art keywords
sound
slit
double
relating
mirror
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
GB3496837A
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
Application filed by Electrical Research Products Inc filed Critical Electrical Research Products Inc
Priority to GB3496837A priority Critical patent/GB504656A/en
Publication of GB504656A publication Critical patent/GB504656A/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

504,656. Optical sound - recording. WESTERN ELECTRIC CO., Ltd. (Electrical Research Products, Inc.) Dec. 17, 1937, No. 34968. [Class 40 (ii)] Relates to methods of producing " noiseless " double-hump sound-records. Accordng to the invention, a double-hump track is formed by passing the recording light beam through a single triangular aperture 7 in a screen 6 on to an oscillograph mirror 3 by which it is reflected on to a slit 11, the mirror being vibrated about an axis at right. angles to the direction of travel of the film so as to cause the triangular beam to vibrate transversely with respect to the slit ; and a central envelope trace b, Fig. 1, is produced by means of a wedge-shaped mask 15 which is caused to project into the central portion of the beam to an extent varying with the intensity of the sound. Specifications 444,015 and 498,394 are referred to. Reference has been directed by the Comptroller to Specification 422,543.
GB3496837A 1937-12-17 1937-12-17 Improvements in or relating to film sound recording systems Expired GB504656A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB3496837A GB504656A (en) 1937-12-17 1937-12-17 Improvements in or relating to film sound recording systems

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB3496837A GB504656A (en) 1937-12-17 1937-12-17 Improvements in or relating to film sound recording systems

Publications (1)

Publication Number Publication Date
GB504656A true GB504656A (en) 1939-04-28

Family

ID=10372229

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3496837A Expired GB504656A (en) 1937-12-17 1937-12-17 Improvements in or relating to film sound recording systems

Country Status (1)

Country Link
GB (1) GB504656A (en)

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