GB501218A - Improvements in apparatus for the reproduction of sound films - Google Patents

Improvements in apparatus for the reproduction of sound films

Info

Publication number
GB501218A
GB501218A GB3086237A GB3086237A GB501218A GB 501218 A GB501218 A GB 501218A GB 3086237 A GB3086237 A GB 3086237A GB 3086237 A GB3086237 A GB 3086237A GB 501218 A GB501218 A GB 501218A
Authority
GB
United Kingdom
Prior art keywords
track
prisms
sound
type
reproduction
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
GB3086237A
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to GB3086237A priority Critical patent/GB501218A/en
Publication of GB501218A publication Critical patent/GB501218A/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

501,218. Reproduction of recorded sound. KOLB, 0. K. Nov. 10, 1937, No. 30862. [Class 40 (ii)] An apparatus for the reproduction of sound film records either of the asymmetric type or single hump type is characterized by the provision of optical elements adaptable for either type. Light from a source 1 passes through a condenser 3 to the asymmetric sound track 2 moving perpendicular to the plane of the drawing and an enlarged image of this track is focused by lens 4 on a transverse slit 5. Behind this slit are two narrow angle prisms 6a, 6b arranged with their refracting edges contiguous and in line with the centre of the image of the sound track. Refraction by these prisms results in separation of the two half images and each is arranged to fall on a separate photo-sensitive element 7a, 7b. If the track is not of the push-pull type, the two prisms, which are mounted in a carriage, are moved in the direction of the arrow so that one prism 6b covers the whole of the slit 5 and light from the whole width of the sound track is refracted to one photo-sensitive element 7b only. Instead of two prisms, two lenses may be used to form the half images for push-pull records, there being provided a separate single lens for other records, Fig. 2 (not shown). In this latter case, a rotatable turret may be used in place of the carriage, Fig. 3 (not shown). Specification 494,201 is referred to.
GB3086237A 1937-11-10 1937-11-10 Improvements in apparatus for the reproduction of sound films Expired GB501218A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB3086237A GB501218A (en) 1937-11-10 1937-11-10 Improvements in apparatus for the reproduction of sound films

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB3086237A GB501218A (en) 1937-11-10 1937-11-10 Improvements in apparatus for the reproduction of sound films

Publications (1)

Publication Number Publication Date
GB501218A true GB501218A (en) 1939-02-23

Family

ID=10314295

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3086237A Expired GB501218A (en) 1937-11-10 1937-11-10 Improvements in apparatus for the reproduction of sound films

Country Status (1)

Country Link
GB (1) GB501218A (en)

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