GB505897A - Improvements in and relating to lanterns for electric lamps - Google Patents
Improvements in and relating to lanterns for electric lampsInfo
- Publication number
- GB505897A GB505897A GB28346/37A GB2834637A GB505897A GB 505897 A GB505897 A GB 505897A GB 28346/37 A GB28346/37 A GB 28346/37A GB 2834637 A GB2834637 A GB 2834637A GB 505897 A GB505897 A GB 505897A
- Authority
- GB
- United Kingdom
- Prior art keywords
- reflectors
- source
- light
- plane
- shaped
- 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
- F21V7/0025—Combination of two or more reflectors for a single light source
-
- 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
- F21V13/00—Producing particular characteristics or distribution of the light emitted by means of a combination of elements specified in two or more of main groups F21V1/00 - F21V11/00
- F21V13/02—Combinations of only two kinds of elements
-
- 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
- F21V13/00—Producing particular characteristics or distribution of the light emitted by means of a combination of elements specified in two or more of main groups F21V1/00 - F21V11/00
- F21V13/02—Combinations of only two kinds of elements
- F21V13/04—Combinations of only two kinds of elements the elements being reflectors and refractors
-
- 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
- F21V5/00—Refractors for 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
- F21V7/005—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
- F21V7/05—Optical design plane
-
- 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
- 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
- F21W2131/40—Lighting for industrial, commercial, recreational or military use
-
- 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
- F21Y2101/00—Point-like light sources
-
- 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
-
- 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
- F21Y2115/00—Light-generating elements of semiconductor light sources
- F21Y2115/10—Light-emitting diodes [LED]
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Non-Portable Lighting Devices Or Systems Thereof (AREA)
Abstract
505,897. Street &c. lamps. BRITISH THOMSON-HOUSTON CO., Ltd., MAXTED, R., and BERTRAM, J. Oct. 18, 1937, No. 28346. [Classes 75 (ii) and 75 (iv)] A street or like lamp comprises curved reflectors 4 arranged above the light source 2, one on each side of a vertical plane passing therethrough and each shaped to direct light downwardly on to a narrow band 6 on a plane reflector 5 on the same side of the vertical plane, the reflectors 5 being disposed in planes passing through the source 2 so as to redirect the light in the required directions and additional side reflectors 3 being provided to reflect the lateral rays from the source 2 through the space between the latter and the upper edges of the reflectors 5. In a modification, each reflector 4 is formed with a portion shaped to direct a part of the light downwardly through the space between the reflectors 3 and 5 on its own side of the vertical plane through the source. The linear source 2 and trough-shaped reflectors 3, 4 shown on Figs. 2, 3 may be replaced by a point source and reflectors arranged concentrically around the vertical axis of the source, an infinite number of reflectors 5 being, in this case, disposed in a circle to form a single band having the form of a truncated cone. Plane refractors may be used instead of the reflectors 5.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB28346/37A GB505897A (en) | 1937-10-18 | 1937-10-18 | Improvements in and relating to lanterns for electric lamps |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB28346/37A GB505897A (en) | 1937-10-18 | 1937-10-18 | Improvements in and relating to lanterns for electric lamps |
Publications (1)
Publication Number | Publication Date |
---|---|
GB505897A true GB505897A (en) | 1939-05-18 |
Family
ID=10274223
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB28346/37A Expired GB505897A (en) | 1937-10-18 | 1937-10-18 | Improvements in and relating to lanterns for electric lamps |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB505897A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4006355A (en) * | 1974-11-26 | 1977-02-01 | Sylvan R. Shemitz And Associates, Inc. | Luminaire |
US4034217A (en) * | 1974-06-21 | 1977-07-05 | Roger Louis Dumont | Optical device for lighting apparatus, with a plurality of combined reflectors |
-
1937
- 1937-10-18 GB GB28346/37A patent/GB505897A/en not_active Expired
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4034217A (en) * | 1974-06-21 | 1977-07-05 | Roger Louis Dumont | Optical device for lighting apparatus, with a plurality of combined reflectors |
US4006355A (en) * | 1974-11-26 | 1977-02-01 | Sylvan R. Shemitz And Associates, Inc. | Luminaire |
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