GB554369A - Improvements in luminairs - Google Patents

Improvements in luminairs

Info

Publication number
GB554369A
GB554369A GB12936/42A GB1293642A GB554369A GB 554369 A GB554369 A GB 554369A GB 12936/42 A GB12936/42 A GB 12936/42A GB 1293642 A GB1293642 A GB 1293642A GB 554369 A GB554369 A GB 554369A
Authority
GB
United Kingdom
Prior art keywords
lens
axis
source
rays
points
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
GB12936/42A
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.)
Holophane Corp
Original Assignee
Holophane Corp
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 Holophane Corp filed Critical Holophane Corp
Priority to GB12936/42A priority Critical patent/GB554369A/en
Publication of GB554369A publication Critical patent/GB554369A/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
    • F21V5/04—Refractors for light sources of lens 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)
  • Non-Portable Lighting Devices Or Systems Thereof (AREA)

Abstract

554,369. Luminairs. HOLOPHANE. Ltd., (Holophane, Co., Inc.). Sept. 14, 1942, No. 12936. [Class 75 (ii)] A luminair having a light source extending to or concentrated at two points 11, 12 on opposite sides of its axis B-B of symmetry is fitted with a lens 13 of the Fresnel type formed with prisms shaped so that all rays such as 14<SP>1</SP>, 15<SP>1</SP> from the source 11 falling on the lens 13 to the left of the axis B-B and all ray such as 14, 15 from the source 12 falling on the lens 13 to the right of the axis B-B are refracted so as to emerge as rays 22<SP>1</SP>, 21<SP>1</SP>, 22, 21, parallel to the axis B-B, while the rays 17', 18<SP>1</SP> and 17, 18 crossing the axis emerge as two parallel divergent beams. If the points 11, 12 are diametrally opposite points on a ring filament of a high wattage lamp the lens may consist of a round plate formed by the revolution of the diametral strip about the axis B-B. If the source of light consists of luminous strip formed by two tubular lamps the lens consists of a plate formed by moving the strip shown at right angles to its plane. The lens so formed comprises light refracting elements whose refracting power decreases from the middle to a region of zero refracting power and beyond this region increases in refracting power to a value substantially greater than that at the middle.
GB12936/42A 1942-09-14 1942-09-14 Improvements in luminairs Expired GB554369A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB12936/42A GB554369A (en) 1942-09-14 1942-09-14 Improvements in luminairs

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB12936/42A GB554369A (en) 1942-09-14 1942-09-14 Improvements in luminairs

Publications (1)

Publication Number Publication Date
GB554369A true GB554369A (en) 1943-06-30

Family

ID=10013856

Family Applications (1)

Application Number Title Priority Date Filing Date
GB12936/42A Expired GB554369A (en) 1942-09-14 1942-09-14 Improvements in luminairs

Country Status (1)

Country Link
GB (1) GB554369A (en)

Similar Documents

Publication Publication Date Title
US3329812A (en) Luminaire optical assembly
ES473950A1 (en) Luminaires
FR1297598A (en) Floodlight giving practically uniform illumination over a rectangular surface
GB1537181A (en) Lighting projector for use in surgical operating theatres
US2115178A (en) Luminaire having means for reducing the apparent size of the light source
GB554369A (en) Improvements in luminairs
GB456520A (en) Improvements in or relating to lamps, searchlights, projectors and the like
GB484428A (en) Improvements in and relating to refractors for street lighting purposes
GB547661A (en) Improvements in or relating to lamp units
SU82081A1 (en) Spotlight
SU700743A1 (en) Lighting fixture
GB530492A (en) Improvements in optical systems comprising reflectors and linear light sources
GB890072A (en) Projector of radiations
GB433787A (en) Improvements in and relating to illuminating devices
GB561540A (en) Improvements in and relating to luminairs
SU31335A1 (en) Searchlight for poppies
SU113913A1 (en) Mirror-lens capacitor
GB283029A (en) Improvements in and relating to traffic signals
GB380867A (en) Improvements in prismatic lighting units
GB596354A (en) Luminaires
GB505897A (en) Improvements in and relating to lanterns for electric lamps
JPS5280668A (en) Illuminating method
GB456094A (en) Improvements in and relating to luminairs
GB618395A (en) Improvements in luminaires and refractors therefor
GB436571A (en) Improvements relating to illuminating devices for aircraft