GB346616A - Improvements in or relating to combined kinematographic and sound record films - Google Patents
Improvements in or relating to combined kinematographic and sound record filmsInfo
- Publication number
- GB346616A GB346616A GB18077/30A GB1807730A GB346616A GB 346616 A GB346616 A GB 346616A GB 18077/30 A GB18077/30 A GB 18077/30A GB 1807730 A GB1807730 A GB 1807730A GB 346616 A GB346616 A GB 346616A
- Authority
- GB
- United Kingdom
- Prior art keywords
- sound
- picture
- emulsion
- kodak
- 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
Landscapes
- Silver Salt Photography Or Processing Solution Therefor (AREA)
Abstract
346,616. Combined sound and picture films. KODAK, Ltd., Kodak House, Kingsway, London.-(Assignees of Sandvik, O. ; Kodak Park, Rochester, New York, U.S.A.) June 12, 1930, No. 18077. Convention date, June 14, 1929. Drawings to Specification. [Class 40 (ii).] A combined sound and kinematograph positive film is produced so as to offer a differential gamma control between the piston record and the sound record by coating the picture and sound areas respectively with emulsions whose characteristics are such that the product of the gammas of the positive and negative sound record is a constant and equal to unity and has a light transmission average not less than 35 per cent, the emulsion on the picture area having a different gamma when both areas are printed by lengths of the same character. One method of attaining this is to employ different dyes in the respective emulsions, for example a yellow dye in the picture emulsion and an orange, blue or green dye in the sound emulsion and printing by a common light directed through a suitable filter. United States Specification 1,690,617 is referred to.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US346616XA | 1929-06-14 | 1929-06-14 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB346616A true GB346616A (en) | 1931-04-16 |
Family
ID=21877809
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB18077/30A Expired GB346616A (en) | 1929-06-14 | 1930-06-12 | Improvements in or relating to combined kinematographic and sound record films |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB346616A (en) |
-
1930
- 1930-06-12 GB GB18077/30A patent/GB346616A/en not_active Expired
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