GB679282A - Improvements in or relating to sound recording apparatus for cinematograph films - Google Patents
Improvements in or relating to sound recording apparatus for cinematograph filmsInfo
- Publication number
- GB679282A GB679282A GB1323350A GB1323350A GB679282A GB 679282 A GB679282 A GB 679282A GB 1323350 A GB1323350 A GB 1323350A GB 1323350 A GB1323350 A GB 1323350A GB 679282 A GB679282 A GB 679282A
- Authority
- GB
- United Kingdom
- Prior art keywords
- sound
- picture
- pulse
- film
- picture film
- 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
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
- G03B31/00—Associated working of cameras or projectors with sound-recording or sound-reproducing means
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Signal Processing For Digital Recording And Reproducing (AREA)
Abstract
679,282. Combined sound and picture apparatus. LEEVERS, F. N. G. May 10, 1951. [May 25, 1950] No' 13233/50. Drawings to Specification. Class 40 (ii). [Also in Group XXXV] A method or apparatus for producing a sound record in synchronisation with a kinematograph picture film, comprises recording the sound on one part of the width of a magnetic record tape and simultaneously recording alongside the sound track a pulse signal generated in synchronism with the frames on the picture film. The sound record may then be reproduced, or recorded on a combined sound and picture film, in synchronism with the pictures by adjusting the speed of the magnetic tape so that the pulses thereon are synchronous with pulses produced by the picture film mechanism. The speed of the sound film may be automatically controlled, when reproducing or recording on the combined sound and picture film by providing a driving means which tends to move the sound film too fast, but is slowed down by a brake controlled by a difference signal produced from the recorded pulse and the pulse from the picture film mechanism. The recorded pulse may be in the form of a pulse-modulated carrier wave produced by an oscillator having a carrier frequency of 1,000 to 5,000 cycles/second and modulated by a. generator driven by the picture mechanism.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB1323350A GB679282A (en) | 1950-05-25 | 1950-05-25 | Improvements in or relating to sound recording apparatus for cinematograph films |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB1323350A GB679282A (en) | 1950-05-25 | 1950-05-25 | Improvements in or relating to sound recording apparatus for cinematograph films |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB679282A true GB679282A (en) | 1952-09-17 |
Family
ID=10019259
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB1323350A Expired GB679282A (en) | 1950-05-25 | 1950-05-25 | Improvements in or relating to sound recording apparatus for cinematograph films |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB679282A (en) |
-
1950
- 1950-05-25 GB GB1323350A patent/GB679282A/en not_active Expired
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