GB319678A - Improvements in means for controlling light intensity in kinematograph apparatus - Google Patents
Improvements in means for controlling light intensity in kinematograph apparatusInfo
- Publication number
- GB319678A GB319678A GB1852628A GB1852628A GB319678A GB 319678 A GB319678 A GB 319678A GB 1852628 A GB1852628 A GB 1852628A GB 1852628 A GB1852628 A GB 1852628A GB 319678 A GB319678 A GB 319678A
- Authority
- GB
- United Kingdom
- Prior art keywords
- zone
- light intensity
- periodically
- condenser
- 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
- G03B41/00—Special techniques not covered by groups G03B31/00 - G03B39/00; Apparatus therefor
- G03B41/02—Special techniques not covered by groups G03B31/00 - G03B39/00; Apparatus therefor using non-intermittently running film
- G03B41/04—Special techniques not covered by groups G03B31/00 - G03B39/00; Apparatus therefor using non-intermittently running film with optical compensator
- G03B41/08—Special techniques not covered by groups G03B31/00 - G03B39/00; Apparatus therefor using non-intermittently running film with optical compensator with rotating transmitting member
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Projection Apparatus (AREA)
Abstract
319,678. Roberts, F. G. A. June 26, 1928. Kinematograph apparatus. - In continuousfeed projectors having a large stationary lens 8 and a series of smaller lenses 9 moving parallel with the film for compensation, means is provided to counteract the periodical fluctuation of the light intensity. As shown, a disc 10 having a zone 12 of varying opacity is provided, and is rotated synchronously with the feed sprocket 6. Light from the source 2 passes through a condenser 4 and the zone 12 on its way to the film 3. In alternative, constructions an iris diaphragm may be provided, its aperture being periodically varied, a zone of varying opacity may be formed on the lens 8, the reflector 20 may be periodically turned about a vertical axis, the condenser may be reciprocated, or a rheostat in the lamp circuit may be periodically controlled. Specification 16200/15 is referred to.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB1852628A GB319678A (en) | 1928-06-26 | 1928-06-26 | Improvements in means for controlling light intensity in kinematograph apparatus |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB1852628A GB319678A (en) | 1928-06-26 | 1928-06-26 | Improvements in means for controlling light intensity in kinematograph apparatus |
Publications (1)
Publication Number | Publication Date |
---|---|
GB319678A true GB319678A (en) | 1929-09-26 |
Family
ID=10113939
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB1852628A Expired GB319678A (en) | 1928-06-26 | 1928-06-26 | Improvements in means for controlling light intensity in kinematograph apparatus |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB319678A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2441013A (en) * | 1945-07-20 | 1948-05-04 | Franz F Ehrenhaft | Cinematographic rotatable prism projector |
-
1928
- 1928-06-26 GB GB1852628A patent/GB319678A/en not_active Expired
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2441013A (en) * | 1945-07-20 | 1948-05-04 | Franz F Ehrenhaft | Cinematographic rotatable prism projector |
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