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GB1103971A - Improvements in electric lanterns - Google Patents

Improvements in electric lanterns

Info

Publication number
GB1103971A
GB1103971A GB34626/65A GB3462665A GB1103971A GB 1103971 A GB1103971 A GB 1103971A GB 34626/65 A GB34626/65 A GB 34626/65A GB 3462665 A GB3462665 A GB 3462665A GB 1103971 A GB1103971 A GB 1103971A
Authority
GB
United Kingdom
Prior art keywords
plate
prisms
series
lower series
electric lanterns
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
GB34626/65A
Inventor
Alan Peter Stimson
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.)
Eleco Ltd
Original Assignee
Eleco 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 Eleco Ltd filed Critical Eleco Ltd
Priority to GB34626/65A priority Critical patent/GB1103971A/en
Publication of GB1103971A publication Critical patent/GB1103971A/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
    • F21V3/00—Globes; Bowls; Cover glasses
    • 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
    • F21V5/02—Refractors for light sources of prismatic shape
    • 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)
  • Casting Devices For Molds (AREA)

Abstract

1,103,971. Fresnel lenses. ELECO Ltd. Oct. 13, 1966 [Aug. 12, 1965], No.24626/65. Heading G2J. [Also in Division F4] A refractor plate designed to be fitted to the sloping side wall of a sodium street lantern has upper and lower series of prisms 31, 32 each of which is inclined at progressively smaller angles to the vertical from the extremity of the plate towards its centre. Detailed dimensions are given for a plate having 18 prisms in the upper series and 10 in the lower series.
GB34626/65A 1965-08-12 1965-08-12 Improvements in electric lanterns Expired GB1103971A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB34626/65A GB1103971A (en) 1965-08-12 1965-08-12 Improvements in electric lanterns

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB34626/65A GB1103971A (en) 1965-08-12 1965-08-12 Improvements in electric lanterns

Publications (1)

Publication Number Publication Date
GB1103971A true GB1103971A (en) 1968-02-21

Family

ID=10367997

Family Applications (1)

Application Number Title Priority Date Filing Date
GB34626/65A Expired GB1103971A (en) 1965-08-12 1965-08-12 Improvements in electric lanterns

Country Status (1)

Country Link
GB (1) GB1103971A (en)

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