GB501188A - Improvements in film-feeding devices for cinematographs - Google Patents
Improvements in film-feeding devices for cinematographsInfo
- Publication number
- GB501188A GB501188A GB24868/38A GB2486838A GB501188A GB 501188 A GB501188 A GB 501188A GB 24868/38 A GB24868/38 A GB 24868/38A GB 2486838 A GB2486838 A GB 2486838A GB 501188 A GB501188 A GB 501188A
- Authority
- GB
- United Kingdom
- Prior art keywords
- plate
- cam
- arm
- plates
- pin
- 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
- G03B1/00—Film strip handling
- G03B1/18—Moving film strip by means which act on the film between the ends thereof
- G03B1/20—Acting means
- G03B1/22—Claws or pins engaging holes in the film
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Storage Of Web-Like Or Filamentary Materials (AREA)
- Advancing Webs (AREA)
- Registering, Tensioning, Guiding Webs, And Rollers Therefor (AREA)
Abstract
501,188. Kinematograph apparatus. BOSCH GES., R. Aug. 24, 1938, No. 24868. Convention date; Aug. 24, 1937. [Class 97 (i)] The claw arm of an intermittent feed mechanism wherein the arm embraces a cam, and the arm and cam have different coefficients of expansion, comprises two or more plates side by side, and resiliently connected in a manner tending to reduce the effective size of the cam aperture. The arm may comprise two plates a<1>, a<2>, each of synthetic resin containing textile fabric, and having apertures b embracing a steel cam d. The plate a<1> has an extension el carrying claws f, and a lug i<1> linked by a compression spring h to a lug i<2> on the plate a<2>, the'plate a<2> being carried by a pivot pin g on the plate a<1>. The plates have slots w engaging a fixed, but rotatable, bush x, eccentrically mounted, and have weightreducing holes z ; the hole in the plate a<2> receiving the pin g may be of larger diameter than the pin. The cam may be screwed to discs k m, the disc m being secured to a driving shaft o, and being provided with a knob v, covered with heat-insulating material, to permit hand adjustment. A groove for lubricant may be provided round the aperture b in the face of the plate a<3> contacting with the plate a<1>, and lubricating grooves r u may also be provided, the .groove u being in a ring t pressed by a spring s. A third plate may be provided on the side of the plate a<1> remote from the plate a<2> and be connected to the plate a<1> by a spring tending to displace it in one direction or the other.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE501188X | 1937-08-24 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB501188A true GB501188A (en) | 1939-02-22 |
Family
ID=6545731
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB24868/38A Expired GB501188A (en) | 1937-08-24 | 1938-08-24 | Improvements in film-feeding devices for cinematographs |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB501188A (en) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2481115A (en) * | 1944-07-18 | 1949-09-06 | Heurtier Antoine | Intermittent claw type film driving device |
US2552457A (en) * | 1947-04-10 | 1951-05-08 | Raskin Archie | Intermittent claw type feeding means for motion-picture drive mechanisms |
US2633056A (en) * | 1950-09-09 | 1953-03-31 | Vry Corp De | Intermittent mechanism for motion-picture projecting mechanisms |
US3439981A (en) * | 1966-04-12 | 1969-04-22 | Gaf Corp | Motion-picture projector |
-
1938
- 1938-08-24 GB GB24868/38A patent/GB501188A/en not_active Expired
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2481115A (en) * | 1944-07-18 | 1949-09-06 | Heurtier Antoine | Intermittent claw type film driving device |
US2552457A (en) * | 1947-04-10 | 1951-05-08 | Raskin Archie | Intermittent claw type feeding means for motion-picture drive mechanisms |
US2633056A (en) * | 1950-09-09 | 1953-03-31 | Vry Corp De | Intermittent mechanism for motion-picture projecting mechanisms |
US3439981A (en) * | 1966-04-12 | 1969-04-22 | Gaf Corp | Motion-picture projector |
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