GB324447A - Improvements in or relating to light slits for sound recording or reproduction - Google Patents

Improvements in or relating to light slits for sound recording or reproduction

Info

Publication number
GB324447A
GB324447A GB3333428A GB3333428A GB324447A GB 324447 A GB324447 A GB 324447A GB 3333428 A GB3333428 A GB 3333428A GB 3333428 A GB3333428 A GB 3333428A GB 324447 A GB324447 A GB 324447A
Authority
GB
United Kingdom
Prior art keywords
slit
support
transparent
enamel
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
GB3333428A
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 GB3333428A priority Critical patent/GB324447A/en
Publication of GB324447A publication Critical patent/GB324447A/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

  • Cell Separators (AREA)
  • Photometry And Measurement Of Optical Pulse Characteristics (AREA)

Abstract

324,447. Pereira, F. A., and British Talking Pictures, Ltd. Nov. 14, 1928. Optical apparatus. - A light slit unit for soundrecording and reproducing apparatus is made by scoring, etching, &c. a line in an opaque plate or in an opaque coating on a transparent support, or by spacing two opaque members apart the necessary distance to provide the slit between them. The slit may be coated or filled in with transparent enamel which may be fused to the support. Fig. 2 shows a slit 3 made in a coating 2 of black ceramic enamel, non-actinic glass, or burnt-in metal on a transparent glass &c. support 1. A lens 4 may be attached to the support to condense the light on the slit, or alternatively, the support may be partially cut away opposite to the slit. Fig. 5 shows the slit 12 provided by two spaced-apart coated supports 9, 10, the slit being filled with transparent powdered enamel which is fused to unite the supports and furnish a transparent slit. The slit unit may form one of the raceways of a film gate.
GB3333428A 1928-11-14 1928-11-14 Improvements in or relating to light slits for sound recording or reproduction Expired GB324447A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB3333428A GB324447A (en) 1928-11-14 1928-11-14 Improvements in or relating to light slits for sound recording or reproduction

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB3333428A GB324447A (en) 1928-11-14 1928-11-14 Improvements in or relating to light slits for sound recording or reproduction

Publications (1)

Publication Number Publication Date
GB324447A true GB324447A (en) 1930-01-30

Family

ID=10351593

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3333428A Expired GB324447A (en) 1928-11-14 1928-11-14 Improvements in or relating to light slits for sound recording or reproduction

Country Status (1)

Country Link
GB (1) GB324447A (en)

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