GB331256A - Improvements in or relating to devices for producing or restoring synchronism as between the projector and the gramophone of a talking-picture machine - Google Patents
Improvements in or relating to devices for producing or restoring synchronism as between the projector and the gramophone of a talking-picture machineInfo
- Publication number
- GB331256A GB331256A GB989729A GB989729A GB331256A GB 331256 A GB331256 A GB 331256A GB 989729 A GB989729 A GB 989729A GB 989729 A GB989729 A GB 989729A GB 331256 A GB331256 A GB 331256A
- Authority
- GB
- United Kingdom
- Prior art keywords
- gramophone
- projector
- casing
- speed
- talking
- 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)
- Gear Transmission (AREA)
Abstract
331,256. Hepworth, C. M. March 27, 1929. Gramophones associated with kinematographs. - Relates to talking-picture apparatus comprising a synchronously working gramophone and kinematograph, and consists of a particular arrangement of mechanism, embodying epicyclic gearing, whereby errors of phase may be corrected, such errors being caused, for example, by the gramophone needle jumping out of proper position on the record groove. In the system shown in Fig. 1, a gramophone 11 and a kinematograph projector 10 are driven by a common motor 12. The connection between the motor and the projector comprises two shafts 14, 15 coupled by a pair of epicyclic gear trains as shown in Fig. 3. Each of these trains consists of two wheels 19, 20 of slightly different diameter, gearing respectively with coaxial pinions 21, 22 fixed on a shaft 24 which is mounted in a casing 18. Normally the casings 18 rotate solidly with the shafts 14, 15 and the intermediate shaft 23. If, however, it is necessary at any time to speed up or retard the projector relatively to the gramophone, one of the casings 18 is gripped by hand, thus causing the gears associated with that casing to alter the speed of the driven shaft. The two gear trains are similarly constructed, but the wheels are oppositely arranged, so that the effect produced by gripping one casing is the opposite of that produced by holding the other. The invention may be applied, as shown in Fig. 2, to a system in which a speed-equalizing rheostat 26 - - 28 is used in conjunction with two separately driven machines 10, 11, as described in Specification 324,005. A flexible coupling device 29 may also be provided in this arrangement, as described in Specification 325,882.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB989729A GB331256A (en) | 1929-03-27 | 1929-03-27 | Improvements in or relating to devices for producing or restoring synchronism as between the projector and the gramophone of a talking-picture machine |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB989729A GB331256A (en) | 1929-03-27 | 1929-03-27 | Improvements in or relating to devices for producing or restoring synchronism as between the projector and the gramophone of a talking-picture machine |
Publications (1)
Publication Number | Publication Date |
---|---|
GB331256A true GB331256A (en) | 1930-06-27 |
Family
ID=9880805
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB989729A Expired GB331256A (en) | 1929-03-27 | 1929-03-27 | Improvements in or relating to devices for producing or restoring synchronism as between the projector and the gramophone of a talking-picture machine |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB331256A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2486082A (en) * | 1946-11-07 | 1949-10-25 | Wagneradio Company | Synchronizing mechanism |
-
1929
- 1929-03-27 GB GB989729A patent/GB331256A/en not_active Expired
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2486082A (en) * | 1946-11-07 | 1949-10-25 | Wagneradio Company | Synchronizing mechanism |
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