GB316079A - Improvements in or relating to picture projecting apparatus - Google Patents
Improvements in or relating to picture projecting apparatusInfo
- Publication number
- GB316079A GB316079A GB3613728A GB3613728A GB316079A GB 316079 A GB316079 A GB 316079A GB 3613728 A GB3613728 A GB 3613728A GB 3613728 A GB3613728 A GB 3613728A GB 316079 A GB316079 A GB 316079A
- Authority
- GB
- United Kingdom
- Prior art keywords
- lens
- relating
- projecting apparatus
- picture projecting
- picture
- 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
- G03B21/20—Lamp housings
- G03B21/208—Homogenising, shaping of the illumination light
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Projection Apparatus (AREA)
Abstract
316,079. Hammond, P. G. Neave-, and Rigby, P. Dec. 7, 1928. Optical-projection apparatus. - In kinematograph projectors having a reflecting system 2, 6 to divert light to a lantern slide holder 7, a lens 4 or lens combination is provided between the reflectors to prevent the appearance in the picture of a shadow due to the electrodes of the projection lamp. As shown, the lens 4 is double concave and of short focus, and is carried by an arm 9 capable of being turned on a spindle 10 by a handle 11 movable between stops 12, 13. The reflector system &c. may be moved into or out of position automatically with movement of the reflector system into or out of use.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB3613728A GB316079A (en) | 1928-12-07 | 1928-12-07 | Improvements in or relating to picture projecting apparatus |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB3613728A GB316079A (en) | 1928-12-07 | 1928-12-07 | Improvements in or relating to picture projecting apparatus |
Publications (1)
Publication Number | Publication Date |
---|---|
GB316079A true GB316079A (en) | 1929-07-25 |
Family
ID=10385332
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB3613728A Expired GB316079A (en) | 1928-12-07 | 1928-12-07 | Improvements in or relating to picture projecting apparatus |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB316079A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US11949644B2 (en) | 2007-03-22 | 2024-04-02 | Google Llc | Systems and methods for relaying messages in a communications system |
-
1928
- 1928-12-07 GB GB3613728A patent/GB316079A/en not_active Expired
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US11949644B2 (en) | 2007-03-22 | 2024-04-02 | Google Llc | Systems and methods for relaying messages in a communications system |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
GB1372462A (en) | Overhead slide projector | |
GB316079A (en) | Improvements in or relating to picture projecting apparatus | |
GB456520A (en) | Improvements in or relating to lamps, searchlights, projectors and the like | |
GB825638A (en) | Improvements relating to lighting apparatus | |
SU58634A1 (en) | Projection apparatus for epidiagrafoscopy | |
GB412579A (en) | Improvements in and relating to kinematograph projectors | |
SU12973A1 (en) | Projection lamp | |
GB201956A (en) | Improvements in or relating to lamps for motor cars, illuminating photographic studios, theatre spot lights, search lights, lighthouses and the like | |
GB423742A (en) | Improvements in or relating to light projectors | |
GB332236A (en) | Improvements in optical lanterns | |
JPS5280668A (en) | Illuminating method | |
ES86720U (en) | Projector device suitable for total lighting throughout the turning angle (Machine-translation by Google Translate, not legally binding) | |
GB336499A (en) | Improvements in or relating to episcopic projection apparatus | |
ES60000U (en) | Projector microscope for multiple applications (Machine-translation by Google Translate, not legally binding) | |
GB571242A (en) | Incandescent electric projection lamp with rectifier | |
GB541155A (en) | Improvements relating to the optical projection of images | |
GB200647A (en) | Improvements in light projectors especially suitable for use upon vehicles | |
GB243893A (en) | Method of and means for illuminating pictures and other representations and articlesfor the purpose of enlargement or reduction by optical means | |
FR888757A (en) | Tilting projector with light source influenced by its position | |
ES218178A1 (en) | Improvements in the construction of fixed view projectors for opaque and transparent bodies (Machine-translation by Google Translate, not legally binding) | |
ES204116U (en) | Luminous beam projector recortable. (Machine-translation by Google Translate, not legally binding) | |
GB191200502A (en) | Improvements in and relating to Light Projectors. | |
GB568391A (en) | Improvements in or relating to optical magnifying appliances | |
ES289624A1 (en) | Shadowless lighting apparatus | |
ES107805U (en) | Lamp for optical luminous signals. (Machine-translation by Google Translate, not legally binding) |