GB675215A - Improvements in or relating to cinema film projectors - Google Patents
Improvements in or relating to cinema film projectorsInfo
- Publication number
- GB675215A GB675215A GB2176249A GB2176249A GB675215A GB 675215 A GB675215 A GB 675215A GB 2176249 A GB2176249 A GB 2176249A GB 2176249 A GB2176249 A GB 2176249A GB 675215 A GB675215 A GB 675215A
- Authority
- GB
- United Kingdom
- Prior art keywords
- lamp
- plate
- air
- conical
- electric
- 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
- G03B21/16—Cooling; Preventing overheating
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Projection Apparatus (AREA)
- Non-Portable Lighting Devices Or Systems Thereof (AREA)
Abstract
675,215. Optical - - projection apparatus. GENERAL ELECTRIC CO., Ltd., and PRICE, W. A. Aug. 22, 1950 [Aug. 22, 1949], No. 21762/49. Class 97 (i). [Also in Group XL (a)] A film projector comprises a removable mounting for an electric discharge lamp, the mounting including electric couplings, a transparent enclosure adapted to surround the lamp, at least partially, and means for supplying cooling air to the outside of the enclosure and also, to a limited extent, to the inside thereof to cool the lamp. A metallic channelshaped member 21 may be secured by nuts within the projector casing through flanges 24 so that it is located above an electric fan; it is recessed at 22 where the high-pressure mercury - vapour bulb is located between the reflector and condenser lens and is provided with a conical lamp support 31 and a conical spring- mounted support 33 which is slidable in a member 34 carried by a plate 36. Rotation of gauze - covered apertures 52 in a plate 53 relatively to apertures in plate 36 by a lever adjusts the flow of air within the surrounding glass tube 39 registered within the flange 38. The lamp carries a disc 50 to deflect air away from the lower part of the bulb and may carry a conical member to deflect hot air from the upper part. Connections from the caps are taken through a bushing 44 to knife contacts 41, 45.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB2176249A GB675215A (en) | 1949-08-22 | 1949-08-22 | Improvements in or relating to cinema film projectors |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB2176249A GB675215A (en) | 1949-08-22 | 1949-08-22 | Improvements in or relating to cinema film projectors |
Publications (1)
Publication Number | Publication Date |
---|---|
GB675215A true GB675215A (en) | 1952-07-09 |
Family
ID=10168362
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB2176249A Expired GB675215A (en) | 1949-08-22 | 1949-08-22 | Improvements in or relating to cinema film projectors |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB675215A (en) |
-
1949
- 1949-08-22 GB GB2176249A patent/GB675215A/en not_active Expired
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