GB859497A - Improvements in cinematograph projectors - Google Patents
Improvements in cinematograph projectorsInfo
- Publication number
- GB859497A GB859497A GB32337/57A GB3233757A GB859497A GB 859497 A GB859497 A GB 859497A GB 32337/57 A GB32337/57 A GB 32337/57A GB 3233757 A GB3233757 A GB 3233757A GB 859497 A GB859497 A GB 859497A
- Authority
- GB
- United Kingdom
- Prior art keywords
- film
- speed
- flywheel
- sprocket
- driven
- 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
- G11B15/00—Driving, starting or stopping record carriers of filamentary or web form; Driving both such record carriers and heads; Guiding such record carriers or containers therefor; Control thereof; Control of operating function
- G11B15/18—Driving; Starting; Stopping; Arrangements for control or regulation thereof
- G11B15/26—Driving record carriers by members acting directly or indirectly thereon
- G11B15/34—Driving record carriers by members acting directly or indirectly thereon through non-slip drive means, e.g. sprocket
Landscapes
- Developing Agents For Electrophotography (AREA)
- Basic Packing Technique (AREA)
- Devices For Conveying Motion By Means Of Endless Flexible Members (AREA)
Abstract
859,497. Sound-film speed-controlling devices. PAPINI, G. Oct. 16, 1957 [Oct. 16, 1956], No. 32337/57. Class 40 (2). In an automatic speed compensating device for controlling the running of a film through the sound head of a cine projector, the flywheel effecting even speed of the film is driven both by the film itself and an auxiliary motor through a speed varying arrangement controlled by film tension regulating members. The film 2 after passing over a feed sprocket 4 and through the picture gate associated with lens 5, is drawn past erase and reproducing heads 6, 7 over a sprocket 8 associated with flywheel 9, and over a jockey pulley 12 by a sprocket 15. The flywheel is thus driven by the film, but is also driven by a rubber pulley 17 or 22 on an auxiliary motor 18 according to the position of a stirrup 21 which is set according to whether a film having 16 or 24 frames per second is being employed. As the drive sprocket 15 tends to speed up and increase tension, the jockey wheel 12 lifts and through a lever 23 lifts the auxiliary motor 18 so that the pulley 17 or 22 drives on a smaller diameter of the flywheel and slows it up accordingly. As the drive sprocket speed drops the reverse action takes place.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| IT859497X | 1956-10-16 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB859497A true GB859497A (en) | 1961-01-25 |
Family
ID=11329843
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB32337/57A Expired GB859497A (en) | 1956-10-16 | 1957-10-16 | Improvements in cinematograph projectors |
Country Status (2)
| Country | Link |
|---|---|
| FR (1) | FR1186394A (en) |
| GB (1) | GB859497A (en) |
-
1957
- 1957-10-16 GB GB32337/57A patent/GB859497A/en not_active Expired
- 1957-10-16 FR FR1186394D patent/FR1186394A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| FR1186394A (en) | 1959-08-21 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| GB1014530A (en) | Sound-and-picture-on-film reproducing apparatus | |
| GB859497A (en) | Improvements in cinematograph projectors | |
| US3025751A (en) | Method for controlling the speed of a motion picture projector | |
| US2031756A (en) | Film feeding mechanism for films having sound track | |
| GB957919A (en) | Kinematographic apparatus | |
| US2033277A (en) | Film driving mechanism for sound picture systems | |
| US2273855A (en) | Film handling and sound apparatus and control thereof | |
| US2095848A (en) | Film driving apparatus | |
| GB964341A (en) | Improvements in or relating to sound recording and reproducing means for use,for example,on a motion picture projector | |
| US4029405A (en) | Sprocketed film transport | |
| US2020857A (en) | Device for recording or reproducing a sound film | |
| GB1112899A (en) | Drive mechanism for strip material | |
| GB310476A (en) | Improvements in or relating to combined motion picture projectors and sound reproducers | |
| GB1256985A (en) | ||
| GB666897A (en) | Improvements in or relating to sound film equipment | |
| GB471654A (en) | Improvements in recording or reproducing apparatus for films | |
| GB1108642A (en) | Improvements in or relating to motion picture projectors | |
| GB772389A (en) | Improvements relating to motion picture projectors | |
| GB731232A (en) | Sound film apparatus with magnetic sound reproduction means | |
| US2023649A (en) | Device for recording and reproducing films | |
| GB463308A (en) | Improvements in and relating to apparatus for taking and projecting pictures and recording and reproducing sound | |
| GB300996A (en) | Improvements in and relating to sound record film printing apparatus | |
| US2098699A (en) | Combined sound and picture apparatus | |
| GB1281642A (en) | Strip handling device | |
| GB948911A (en) | Improvements in or relating to slide projectors |