GB388385A - Improved method for mechanically obtaining sound records of constant density to light - Google Patents
Improved method for mechanically obtaining sound records of constant density to lightInfo
- Publication number
- GB388385A GB388385A GB376933A GB376933A GB388385A GB 388385 A GB388385 A GB 388385A GB 376933 A GB376933 A GB 376933A GB 376933 A GB376933 A GB 376933A GB 388385 A GB388385 A GB 388385A
- Authority
- GB
- United Kingdom
- Prior art keywords
- groove
- stylus
- sinuous
- cuts
- rectilinear
- 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
- G11B11/00—Recording on or reproducing from the same record carrier wherein for these two operations the methods are covered by different main groups of groups G11B3/00 - G11B7/00 or by different subgroups of group G11B9/00; Record carriers therefor
Landscapes
- Adjustment Of The Magnetic Head Position Track Following On Tapes (AREA)
Abstract
388,385. Recording optical soundrecords. NUBLAT, R. L. A., 17, Boulevard du Grand-ChÛne, Le Parc St-Maur, Seine, and SOC. D'ETUDES POUR L'EXPLOITATION DES BREVETS NUBLAT, 56, Rue de Paradis, Paris, both in France. Aug. 17, 1931, No. 3769/33. Divided on 388,373. [Class 40 (ii).] Optical sound-records are mechanically recorded by means of a vibrating stylus which cuts a sinuous groove of constant width in an opaque coating on a transparent support, while a fixed stylus cuts a rectilinear groove which overlaps one side of the sinuous groove. A cutting stylus 12 is vibrated transversely of a moving film 1 under the influence of sound currents fed to an electromagnetic apparatus 14 to form a sinuous groove 3, Fig. 3, of constant width. The apparatus 14 is fixed to a bracket 16 by means of a screw 17, Fig. 1, the knurled head 18 of which permits the stylus 12 to be adjusted relatively to the film 1. A fixed cutting stylus 21, secured in a socket 23 attached to the apparatus 14, cuts a groove 20 having rectilinear edges, one edge of which overlaps one edge of the groove 3. The resultant groove forms a variable-width record which can be reproduced by optical means. If desired, the rectilinear groove may be cut either before or subsequent to the formation of the sinuous groove.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB376933A GB388385A (en) | 1931-08-17 | 1931-08-17 | Improved method for mechanically obtaining sound records of constant density to light |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB376933A GB388385A (en) | 1931-08-17 | 1931-08-17 | Improved method for mechanically obtaining sound records of constant density to light |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB388385A true GB388385A (en) | 1933-02-17 |
Family
ID=9764578
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB376933A Expired GB388385A (en) | 1931-08-17 | 1931-08-17 | Improved method for mechanically obtaining sound records of constant density to light |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB388385A (en) |
-
1931
- 1931-08-17 GB GB376933A patent/GB388385A/en not_active Expired
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