GB617046A - Improvements in or relating to apparatus for recording sound oscillations - Google Patents
Improvements in or relating to apparatus for recording sound oscillationsInfo
- Publication number
- GB617046A GB617046A GB28917/46A GB2891746A GB617046A GB 617046 A GB617046 A GB 617046A GB 28917/46 A GB28917/46 A GB 28917/46A GB 2891746 A GB2891746 A GB 2891746A GB 617046 A GB617046 A GB 617046A
- Authority
- GB
- United Kingdom
- Prior art keywords
- film
- recording
- sound
- modulates
- light
- 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
- G11B3/00—Recording by mechanical cutting, deforming or pressing, e.g. of grooves or pits; Reproducing by mechanical sensing; Record carriers therefor
Landscapes
- Optical Recording Or Reproduction (AREA)
Abstract
617,046. Apparatus for recording sound on film. PHILIPS LAMPS, Ltd. Sept. 27, 1946, No. 28917. Convention date, March 10, 1943. [Class 40 (ii)] In an apparatus for recording sound on film for optical reproduction, means are provided whereby a light beam falling on a photo-electric cell is modulated by the mechanical oscillations of the recording member, in order to provide negative feed-back in the recording amplifier for the purpose of counteracting distortion. In one embodiment, Fig. 1, in which a shallow V-shaped stylus M cuts a track in a film having an opaque surface, a wedge-shaped member S of negligible mass carried by the stylus M modulates a beam of light passing through a slit B on to a photo-electric cell F. In a second embodiment, Fig. 2 (not shown), for photographic sound-films, a mirror S vibrating in accordance with sound vibrations to be recorded modulates light, from a source L, which is reflected on to the film F through a slit. At the same time the mirror S modulates the light, from a second source L<SP>1</SP>, which is reflected on to a photoelectric cell from which the feed-back voltages are obtained.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
NL617046X | 1943-03-10 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB617046A true GB617046A (en) | 1949-01-31 |
Family
ID=19788299
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB28917/46A Expired GB617046A (en) | 1943-03-10 | 1946-09-27 | Improvements in or relating to apparatus for recording sound oscillations |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB617046A (en) |
-
1946
- 1946-09-27 GB GB28917/46A patent/GB617046A/en not_active Expired
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