GB501043A - Improvements in or relating to sound recording - Google Patents
Improvements in or relating to sound recordingInfo
- Publication number
- GB501043A GB501043A GB13955/37A GB1395537A GB501043A GB 501043 A GB501043 A GB 501043A GB 13955/37 A GB13955/37 A GB 13955/37A GB 1395537 A GB1395537 A GB 1395537A GB 501043 A GB501043 A GB 501043A
- Authority
- GB
- United Kingdom
- Prior art keywords
- sound
- record
- records
- film
- slit
- 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
- Recording Measured Values (AREA)
Abstract
501,043. Optical sound - recording. RADIO CORPORATION OF AMERICA. May 19, 1937, No. 13955. Convention date, June 30, 1936. [Class 40 (ii)] To produce sound-records with reduced, "ground noise," the height of the slot 13, Fig. 1, in_the mask 12 is such that its image on the film 20 is equal to one wave length of the lowest sound frequency to be recorded, the height of the slit 19 in the plate 18 is such that its image on the film is of the order of À001 inch or less, and the beam of light passing through the slot 13 and modulated by the galvanometer 16 is adapted to pass through the slit 19 at one edge and at the side of the plate 18 at the other edge so as to form two records on the film, one a record 22 of the sound and the other a record 23 corresponding to the envelope of the sound-record. These two records are superimposed in printing to produce the finished positive record, Fig. 4. Specification 501,042 is referred to for a similar masking method applied to both sides of a bilaterally modulated sound record.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US501043XA | 1936-06-30 | 1936-06-30 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB501043A true GB501043A (en) | 1939-02-20 |
Family
ID=21963395
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB13955/37A Expired GB501043A (en) | 1936-06-30 | 1937-05-19 | Improvements in or relating to sound recording |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB501043A (en) |
-
1937
- 1937-05-19 GB GB13955/37A patent/GB501043A/en not_active Expired
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