GB516012A - Improvements in or relating to lanterns for electric lamps - Google Patents
Improvements in or relating to lanterns for electric lampsInfo
- Publication number
- GB516012A GB516012A GB18072/38A GB1807238A GB516012A GB 516012 A GB516012 A GB 516012A GB 18072/38 A GB18072/38 A GB 18072/38A GB 1807238 A GB1807238 A GB 1807238A GB 516012 A GB516012 A GB 516012A
- Authority
- GB
- United Kingdom
- Prior art keywords
- reflectors
- lanterns
- relating
- electric lamps
- vertical
- 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
- F21V7/00—Reflectors for light sources
- F21V7/04—Optical design
- F21V7/09—Optical design with a combination of different curvatures
-
- 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
- F21V7/00—Reflectors for light sources
- F21V7/005—Reflectors for light sources with an elongated shape to cooperate with linear light sources
-
- 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
- F21V7/00—Reflectors for light sources
- F21V7/04—Optical design
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21W—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO USES OR APPLICATIONS OF LIGHTING DEVICES OR SYSTEMS
- F21W2131/00—Use or application of lighting devices or systems not provided for in codes F21W2102/00-F21W2121/00
- F21W2131/10—Outdoor lighting
- F21W2131/103—Outdoor lighting of streets or roads
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21Y—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO THE FORM OR THE KIND OF THE LIGHT SOURCES OR OF THE COLOUR OF THE LIGHT EMITTED
- F21Y2103/00—Elongate light sources, e.g. fluorescent tubes
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Lighting Device Outwards From Vehicle And Optical Signal (AREA)
- Heating, Cooling, Or Curing Plastics Or The Like In General (AREA)
Abstract
516,012. Street &c. lamps. BRITISH THOMSON-HOUSTON CO., Ltd., MAXTED R.; and BERTRAM, J. June 17, 1938, No. 18072. [Classes 75 (ii) and 75 (iv)] Reflectors 3 above a source of light 1 and reflectors 4 at the sides thereof and forming part of side reflectors 5, 4. 6, are so arranged that upward rays are directed by the former on to the latter, and from the latter redirected in an angular beam beneath the source preferably between 66 and 77 degreees to the vertical. Preferably the reflectors 4 are plane, and the reflectors 5, 6 curved, the latter giving a cut-off of light at 75 degrees to the vertical.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB18072/38A GB516012A (en) | 1938-06-17 | 1938-06-17 | Improvements in or relating to lanterns for electric lamps |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB18072/38A GB516012A (en) | 1938-06-17 | 1938-06-17 | Improvements in or relating to lanterns for electric lamps |
Publications (1)
Publication Number | Publication Date |
---|---|
GB516012A true GB516012A (en) | 1939-12-20 |
Family
ID=10106170
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB18072/38A Expired GB516012A (en) | 1938-06-17 | 1938-06-17 | Improvements in or relating to lanterns for electric lamps |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB516012A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0008006A1 (en) * | 1978-08-04 | 1980-02-20 | Siemens Aktiengesellschaft | Indoor lighting fixture |
-
1938
- 1938-06-17 GB GB18072/38A patent/GB516012A/en not_active Expired
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0008006A1 (en) * | 1978-08-04 | 1980-02-20 | Siemens Aktiengesellschaft | Indoor lighting fixture |
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