GB350306A - Improvements in or relating to photographic sound recording - Google Patents
Improvements in or relating to photographic sound recordingInfo
- Publication number
- GB350306A GB350306A GB22221/30A GB2222130A GB350306A GB 350306 A GB350306 A GB 350306A GB 22221/30 A GB22221/30 A GB 22221/30A GB 2222130 A GB2222130 A GB 2222130A GB 350306 A GB350306 A GB 350306A
- Authority
- GB
- United Kingdom
- Prior art keywords
- recording
- july
- new york
- relating
- record
- 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
- Non-Silver Salt Photosensitive Materials And Non-Silver Salt Photography (AREA)
- Optical Recording Or Reproduction (AREA)
Abstract
350,306. Optical sound recording. RADIO CORPORATION OF AMERICA, 233, Broadway, New York, U.S.A.-(Assignees of Douden, W. L. ; 1581. Mansfield Place, Brooklyn, New York, U.S.A.) July 23, 1930, No. 22221. Convention date, July 24, 1929. [Class 40 (ii).] The photographic material on which a sound record is to be made is exposed to an illumination of predetermined and constant value either simultaneously with or immediately preceding the exposure to the recording light or before the record material is put in the recording apparatus. The preliminary constant exposure preferably corresponds to the point indicated by the line 4 of the characteristic curve 3 of the photographic material and the recording light is of such intensity that the sound record falls entirely within the linear portion 2 of the curve.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US350306XA | 1929-07-24 | 1929-07-24 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB350306A true GB350306A (en) | 1931-06-11 |
Family
ID=21880191
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB22221/30A Expired GB350306A (en) | 1929-07-24 | 1930-07-23 | Improvements in or relating to photographic sound recording |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB350306A (en) |
-
1930
- 1930-07-23 GB GB22221/30A patent/GB350306A/en not_active Expired
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