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 reproductionInfo
- 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
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.
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) |
-
1928
- 1928-11-14 GB GB3333428A patent/GB324447A/en not_active Expired
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