GB505897A - Improvements in and relating to lanterns for electric lamps - Google Patents

Improvements in and relating to lanterns for electric lamps

Info

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
Application number
GB28346/37A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
British Thomson Houston Co Ltd
Original Assignee
British Thomson Houston Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by British Thomson Houston Co Ltd filed Critical British Thomson Houston Co Ltd
Priority to GB28346/37A priority Critical patent/GB505897A/en
Publication of GB505897A publication Critical patent/GB505897A/en
Expired legal-status Critical Current

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.
GB28346/37A 1937-10-18 1937-10-18 Improvements in and relating to lanterns for electric lamps Expired GB505897A (en)

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)

* Cited by examiner, † Cited by third party
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

Cited By (2)

* Cited by examiner, † Cited by third party
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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