GB333141A - Improvements in or relating to projection apparatus - Google Patents
Improvements in or relating to projection apparatusInfo
- Publication number
- GB333141A GB333141A GB4614/30A GB461430A GB333141A GB 333141 A GB333141 A GB 333141A GB 4614/30 A GB4614/30 A GB 4614/30A GB 461430 A GB461430 A GB 461430A GB 333141 A GB333141 A GB 333141A
- Authority
- GB
- United Kingdom
- Prior art keywords
- projection apparatus
- incision
- relating
- lamp
- reflector
- 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
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
- F21V17/00—Fastening of component parts of lighting devices, e.g. shades, globes, refractors, reflectors, filters, screens, grids or protective cages
- F21V17/04—Fastening of component parts of lighting devices, e.g. shades, globes, refractors, reflectors, filters, screens, grids or protective cages the fastening being onto or by the light source
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
- F21S8/00—Lighting devices intended for fixed installation
- F21S8/003—Searchlights, i.e. outdoor lighting device producing powerful beam of parallel rays, e.g. for military or attraction purposes
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Non-Portable Lighting Devices Or Systems Thereof (AREA)
Abstract
333,141. Naamlooze Vennootschap Philips' Gloeilampenfabrieken. Feb. 20, 1929, [Convention date]. Mounting electric lamps in lanterns.-Projection apparatus, more particularly adapted for use as a searchlight, comprises an incandescent electric lamp 2 of the type having a condensation space 4 of which the end containing the filament 3 projects through a lateral aperture 5 or an incision 6 in a relatively movable reflector 1. The incision 6 may be fitted with a cover member. In a modification the lamp is wholly within the reflector.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
NL333141X | 1929-02-20 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB333141A true GB333141A (en) | 1930-08-07 |
Family
ID=19784437
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB4614/30A Expired GB333141A (en) | 1929-02-20 | 1930-02-11 | Improvements in or relating to projection apparatus |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB333141A (en) |
-
1930
- 1930-02-11 GB GB4614/30A patent/GB333141A/en not_active Expired
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