GB460872A - Improvements in or relating to recording sound on films - Google Patents
Improvements in or relating to recording sound on filmsInfo
- Publication number
- GB460872A GB460872A GB20521/36A GB2052136A GB460872A GB 460872 A GB460872 A GB 460872A GB 20521/36 A GB20521/36 A GB 20521/36A GB 2052136 A GB2052136 A GB 2052136A GB 460872 A GB460872 A GB 460872A
- Authority
- GB
- United Kingdom
- Prior art keywords
- recording
- primary
- sound
- film
- scanning
- 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 Recording Or Reproduction (AREA)
Abstract
460,872. Re - recording sound - films. TOBIS TONBILD - SYNDIKAT AKT.- GES. July 24, 1936, No. 20521. Convention date, July 30, 1935. [Class 40 (ii)] Noiseless sound-film records are produced by first recording with transparent marking on an opaque film, re-recording from this primary film, and combining with the new record a modulation of the primary record obtained by scanning. The primary is made by recording the half waves as transparent areas on a dark background by means of a microphone 1 and a split-wave recording device 2. This is re-recorded by balanced cells 4, 5 on the film 6 and, in addition, a modulation band 8 is formed by a further cell 7 scanning the full width of the primary and having the current impulses smoothed. The cell 7 may be extended in the direction of the sound track so that its output may vary with the loudness of the recorded sounds and the currents from the cells 4, 5, and 7 may be superimposed in one recording device. The currents from the sound-scanning cells may be tapped and rectified to produce the noiseless control.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE460872X | 1935-07-30 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB460872A true GB460872A (en) | 1937-02-05 |
Family
ID=6539794
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB20521/36A Expired GB460872A (en) | 1935-07-30 | 1936-07-24 | Improvements in or relating to recording sound on films |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB460872A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2527463A (en) * | 1946-03-29 | 1950-10-24 | Rca Corp | Multicolored record and reproducing system therefor |
| DE760054C (en) * | 1940-09-18 | 1954-04-12 | Tobis Tonbild Syndikat G M B H | Process for producing low-noise sound recordings |
-
1936
- 1936-07-24 GB GB20521/36A patent/GB460872A/en not_active Expired
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE760054C (en) * | 1940-09-18 | 1954-04-12 | Tobis Tonbild Syndikat G M B H | Process for producing low-noise sound recordings |
| US2527463A (en) * | 1946-03-29 | 1950-10-24 | Rca Corp | Multicolored record and reproducing system therefor |
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