GB370422A - Improvements in or relating to methods of and devices for sound reproduction - Google Patents
Improvements in or relating to methods of and devices for sound reproductionInfo
- Publication number
- GB370422A GB370422A GB50631A GB50631A GB370422A GB 370422 A GB370422 A GB 370422A GB 50631 A GB50631 A GB 50631A GB 50631 A GB50631 A GB 50631A GB 370422 A GB370422 A GB 370422A
- Authority
- GB
- United Kingdom
- Prior art keywords
- light
- film
- record
- reflected
- passes
- 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
- Optical Head (AREA)
Abstract
370,422. Optical sound-reproducing apparatus. WHITE, A. E., 5, Quality Court, Chancery Lane, London.-(Radio Corporation of America; 233, Broadway, New York, U.S.A.) Jan. 6, 1931, No. 506. [Class 40 (ii).] In sound reproducing apparatus in which light is reflected from a film record on to a photo-electric ceU, a mirror M is provided to reflectlight from a source L on to the film F, and has an aperture S therein, through which a portion of the light, after reflection from the record, passes to the cell V. The film passes around a drum D, adjacent to which is an end of a tube T in which the parts of the reproducing system, including lenses C, O, are mounted. Light reflected from the record retraces the path of the incident rays, and a portion only passes through the slit S on to the cell. The remainder of the reflected light is picked up by a mirror R<1> and augments the light originally emitted by the source. The drum D may be highly polished, or reflection of the light may take place from the emulsion of the film itself.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB50631A GB370422A (en) | 1931-01-06 | 1931-01-06 | Improvements in or relating to methods of and devices for sound reproduction |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB50631A GB370422A (en) | 1931-01-06 | 1931-01-06 | Improvements in or relating to methods of and devices for sound reproduction |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB370422A true GB370422A (en) | 1932-04-06 |
Family
ID=9705540
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB50631A Expired GB370422A (en) | 1931-01-06 | 1931-01-06 | Improvements in or relating to methods of and devices for sound reproduction |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB370422A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2591045A (en) * | 1948-12-30 | 1952-04-01 | Western Electric Co | Sound recording system |
-
1931
- 1931-01-06 GB GB50631A patent/GB370422A/en not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2591045A (en) * | 1948-12-30 | 1952-04-01 | Western Electric Co | Sound recording system |
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