GB758734A - Improvements in or relating to electric lanterns for street lighting and like purposes - Google Patents

Improvements in or relating to electric lanterns for street lighting and like purposes

Info

Publication number
GB758734A
GB758734A GB32591/53A GB3259153A GB758734A GB 758734 A GB758734 A GB 758734A GB 32591/53 A GB32591/53 A GB 32591/53A GB 3259153 A GB3259153 A GB 3259153A GB 758734 A GB758734 A GB 758734A
Authority
GB
United Kingdom
Prior art keywords
plates
source
street lighting
axis
increase
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
GB32591/53A
Inventor
George Kempton Lambert
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 GB32591/53A priority Critical patent/GB758734A/en
Publication of GB758734A publication Critical patent/GB758734A/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
    • 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
    • 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)
  • Non-Portable Lighting Devices Or Systems Thereof (AREA)

Abstract

758,734. Elongated lamp fittings. BRITISH THOMSON-HOUSTON CO., Ltd. Oct. 19, 1954 [Nov. 24, 1953], No. 32591/53. Classes 75(2) and 75(4). In an electric lantern particularly for street lighting, having reflectors 5, 5<SP>1</SP> arranged on both sides of the vertical axial plane containing the axis of the elongated light source 3 so as to redirect light emanating from the source over predetermined arcs back towards the said plane for emission from the lantern, a refractor device, shown in the form of a plate 7 is arranged to intercept at least some. of the reflected light to modify its direction so as to increase the light intensity in a desired direction or to increase the width of the beam in the desired direction. The refractor plate 7 is formed from twin plates of transparent material each provided on one face with a series of prisms 8 of form appropriate to their required functions, the plates being secured together with their prismatic faces opposing and corresponding prisms in the respective plates aligned in relation to each other and parallel to the axis of the source 3. The top surface 7<SP>1</SP> is opaque.
GB32591/53A 1953-11-24 1953-11-24 Improvements in or relating to electric lanterns for street lighting and like purposes Expired GB758734A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB32591/53A GB758734A (en) 1953-11-24 1953-11-24 Improvements in or relating to electric lanterns for street lighting and like purposes

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB32591/53A GB758734A (en) 1953-11-24 1953-11-24 Improvements in or relating to electric lanterns for street lighting and like purposes

Publications (1)

Publication Number Publication Date
GB758734A true GB758734A (en) 1956-10-10

Family

ID=10341011

Family Applications (1)

Application Number Title Priority Date Filing Date
GB32591/53A Expired GB758734A (en) 1953-11-24 1953-11-24 Improvements in or relating to electric lanterns for street lighting and like purposes

Country Status (1)

Country Link
GB (1) GB758734A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3163365A (en) * 1960-03-23 1964-12-29 Thorn Electrical Ind Ltd Lanterns for street lighting
WO2010064176A1 (en) * 2008-12-05 2010-06-10 Koninklijke Philips Electronics N.V. A luminaire assembly.

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3163365A (en) * 1960-03-23 1964-12-29 Thorn Electrical Ind Ltd Lanterns for street lighting
WO2010064176A1 (en) * 2008-12-05 2010-06-10 Koninklijke Philips Electronics N.V. A luminaire assembly.

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