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)

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