GB393972A - Improvements in refractors for directional illumination - Google Patents

Improvements in refractors for directional illumination

Info

Publication number
GB393972A
GB393972A GB34196/31A GB3419631A GB393972A GB 393972 A GB393972 A GB 393972A GB 34196/31 A GB34196/31 A GB 34196/31A GB 3419631 A GB3419631 A GB 3419631A GB 393972 A GB393972 A GB 393972A
Authority
GB
United Kingdom
Prior art keywords
prisms
refractors
refractor
totally
light
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
GB34196/31A
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.)
General Electric Co PLC
Original Assignee
General Electric Co PLC
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 General Electric Co PLC filed Critical General Electric Co PLC
Priority to GB34196/31A priority Critical patent/GB393972A/en
Publication of GB393972A publication Critical patent/GB393972A/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
    • F21V5/00—Refractors for light sources

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Optical Elements Other Than Lenses (AREA)
  • Non-Portable Lighting Devices Or Systems Thereof (AREA)

Abstract

393,972. Lamp shades or refractors. GENERAL ELECTRIC CO., Ltd., Magnet House, Kingsway, London, WALDRAM, J. M. and WILSON, G. H., c/o General Electric Co., Wembley, Middlesex. Dec. 9, 1931, No. 34196. [Class 75 (ii).] In a refractor giving desired light distribution and adapted to supply direct light to a zone of the area to be illuminated and for these purposes having an open bottom, vertical prisms on one surface and horizontal refracting and also totally-reflecting prisms on another surface, the horizontal totally-reflecting prisms 3 are arranged so that substantially all the light redirected by them has a downward direction and the majority of it falls within the directly illuminated zone. The refractor prisms 2 reinforce to a greater or lesser extent the light redirected by the prisms 3.
GB34196/31A 1931-12-09 1931-12-09 Improvements in refractors for directional illumination Expired GB393972A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB34196/31A GB393972A (en) 1931-12-09 1931-12-09 Improvements in refractors for directional illumination

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB34196/31A GB393972A (en) 1931-12-09 1931-12-09 Improvements in refractors for directional illumination

Publications (1)

Publication Number Publication Date
GB393972A true GB393972A (en) 1933-06-09

Family

ID=10362576

Family Applications (1)

Application Number Title Priority Date Filing Date
GB34196/31A Expired GB393972A (en) 1931-12-09 1931-12-09 Improvements in refractors for directional illumination

Country Status (1)

Country Link
GB (1) GB393972A (en)

Similar Documents

Publication Publication Date Title
GB536563A (en) Improvements in or relating to illuminating devices
US2028453A (en) Illuminating apparatus
FR704620A (en) Lighting fixtures improvements
GB393972A (en) Improvements in refractors for directional illumination
GB411112A (en) A new or improved illuminated scenic device for decorative or practical purposes
GB263292A (en) Improved construction of batten or the like for use in connection with the illumination of theatrical stages
GB371732A (en) Improvements relating to imitation fires
USD84913S (en) Design for a lamp globe
GB373046A (en) Improvements in or relating to lanterns for displaying numbers or signs
GB337398A (en) Improvements in and relating to directional street refractors
USD82712S (en) Design for a lighting-fixture bracket or article of similar nature
GB397594A (en) Imitation fuel
GB401034A (en) Improvements in lighting appliances
GB317616A (en) An anti dazzle device for vehicle head lamps
GB511619A (en) Improvements in lighting fittings
GB415964A (en) Improvements in street lighting apparatus
GB424600A (en) Improvements in or relating to directional lighting fittings
GB330788A (en) Improvements in artificial lighting
FR735591A (en) Portable lighting fixtures
GB256427A (en) Improvements in lighting shades for billiard tables and the like
GB244255A (en) Improvements in or relating to lamp reflectors
FR716039A (en) Electric lighting device with a spherical reflector or the like forming a lamp holder
GB265268A (en) Improvements in and relating to the illumination of billiard and like tables
GB483146A (en) Bowls or shades for electric lights
GB522502A (en) Improvements in lighting fittings