GB536356A - Improvements in cinematographic apparatus - Google Patents
Improvements in cinematographic apparatusInfo
- Publication number
- GB536356A GB536356A GB4618/40A GB461840A GB536356A GB 536356 A GB536356 A GB 536356A GB 4618/40 A GB4618/40 A GB 4618/40A GB 461840 A GB461840 A GB 461840A GB 536356 A GB536356 A GB 536356A
- Authority
- GB
- United Kingdom
- Prior art keywords
- sleeve
- spindle
- driven
- engaging
- spring
- 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
- G03B21/00—Projectors or projection-type viewers; Accessories therefor
- G03B21/14—Details
- G03B21/32—Details specially adapted for motion-picture projection
- G03B21/43—Driving mechanisms
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Winding Of Webs (AREA)
- Discharging, Photosensitive Material Shape In Electrophotography (AREA)
- Controlling Rewinding, Feeding, Winding, Or Abnormalities Of Webs (AREA)
Abstract
536,356. Kinematograph apparatus. TECHNICOLOR MOTION PICTURE CORPORATION. March 12, 1940, No. 4618. Convention date, May 31,1939. [Class 97 (i)] In means for driving a take-up spool, comprising friction surfaces carried by driving and driven members and held together by a spring, the pressure exerted by the spring is increased, as winding progresses, by means driven, independently of the film, by either the driving or driven member. As shown, a spindle 7 carrying a spool 5 is driven through a friction clutch 19, the pressure exerted by a spring 31 beind increased, as winding proceeds, by a screwed sleeve 40 rotated intermittently by the spindle 7. The clutch comprises plates 34 engaging a key way in a driven housing 19, plates 36 engaging a key way on the spindle 7, and friction plates 38, the drive for the housing 19 being effected through a worm and a worm wheel 21 secured thereto. The spindle 7 carries a worm 59 driving a worm gear 58, Fig. 2, on a spindle 57 carrying a cam 56 engaging a follower 55 on an arm 50 extending from a sleeve 48. A second arm 49 on the sleeve 48 carries a pawl 51 engaging a ratchet wheel 47 secured to the screwed sleeve 40. The rocking of the arms produced by the cam 56 and by a spring 60 intermittently rotates the screwed sleeve 40, and advances it to increase the clutch pressure. The sleeve 40 may be reset in its original position by a hand-rotatable spindle axially movable to engage a pinion 61 thereon with a gear 45 on the sleeve ; a handle 53 may be used to raise the pawl from the ratchet during the re-setting.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US276567A US2241689A (en) | 1939-05-31 | 1939-05-31 | Cinematographic apparatus |
Publications (1)
Publication Number | Publication Date |
---|---|
GB536356A true GB536356A (en) | 1941-05-12 |
Family
ID=23057151
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB4618/40A Expired GB536356A (en) | 1939-05-31 | 1940-03-12 | Improvements in cinematographic apparatus |
Country Status (3)
Country | Link |
---|---|
US (1) | US2241689A (en) |
FR (1) | FR864676A (en) |
GB (1) | GB536356A (en) |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2857750A (en) * | 1956-05-01 | 1958-10-28 | Carl E Fox | Safety clutch |
US3091951A (en) * | 1961-06-16 | 1963-06-04 | Onyskin Alexander | Slip clutch |
US3831883A (en) * | 1972-10-03 | 1974-08-27 | Eastman Kodak Co | Reel driving device for a web transporting apparatus |
-
1939
- 1939-05-31 US US276567A patent/US2241689A/en not_active Expired - Lifetime
-
1940
- 1940-03-12 GB GB4618/40A patent/GB536356A/en not_active Expired
- 1940-04-06 FR FR864676D patent/FR864676A/en not_active Expired
Also Published As
Publication number | Publication date |
---|---|
US2241689A (en) | 1941-05-13 |
FR864676A (en) | 1941-05-02 |
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