GB489366A - Improvements in or relating to photographic sound records of the variable area type - Google Patents
Improvements in or relating to photographic sound records of the variable area typeInfo
- Publication number
- GB489366A GB489366A GB3268636A GB3268636A GB489366A GB 489366 A GB489366 A GB 489366A GB 3268636 A GB3268636 A GB 3268636A GB 3268636 A GB3268636 A GB 3268636A GB 489366 A GB489366 A GB 489366A
- Authority
- GB
- United Kingdom
- Prior art keywords
- tracks
- track
- slot
- edge
- additional
- 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
- Silver Salt Photography Or Processing Solution Therefor (AREA)
Abstract
489,366. Optical sound records. ELLIS, L. S. E. (Klangfilm Ges.) Jan. 28, 1937, No. 32686/36. [A Specification was laid open to inspection under Sect. 91 of the Acts, May 31, 1937.] [Class 40 (ii)] A photographic linear sound-record of the variable area type is provided with additional side tracks which are respectively duplicates of the oppositely disposed edge parts of the main linear track, so that no distortion results from maladjustment between the linear track and the reproducing slot, any part of one edge of the main track lost by one end of the slot being made up by the corresponding part of the additional track spanned by the other end of the slot. The main track may be a single hump track M, Fig. 3, in which case the additional edge tracks are partial tracks R1, R2. Or the main track and the additional edge tracks may be multiple tracks obtained by a multi-toothed screen. As shown in Fig. 1 a screen a with notches of varying depths is designed for linear reproduction over a span corresponding to a reproducing slot e. The outer parts of the screen co-operate with the ends of the longer recording slot d to produce the additional edge tracks. The width of each of the edge tracks should not exceed about 15 per cent of the width of the main track. Specification 421,020 is referred to.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB3268636A GB489366A (en) | 1937-01-28 | 1937-01-28 | Improvements in or relating to photographic sound records of the variable area type |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB3268636A GB489366A (en) | 1937-01-28 | 1937-01-28 | Improvements in or relating to photographic sound records of the variable area type |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB489366A true GB489366A (en) | 1938-07-26 |
Family
ID=10342480
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB3268636A Expired GB489366A (en) | 1937-01-28 | 1937-01-28 | Improvements in or relating to photographic sound records of the variable area type |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB489366A (en) |
-
1937
- 1937-01-28 GB GB3268636A patent/GB489366A/en not_active Expired
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