GB298447A - Improvements in and relating to illuminating appliances - Google Patents

Improvements in and relating to illuminating appliances

Info

Publication number
GB298447A
GB298447A GB10053/28A GB1005328A GB298447A GB 298447 A GB298447 A GB 298447A GB 10053/28 A GB10053/28 A GB 10053/28A GB 1005328 A GB1005328 A GB 1005328A GB 298447 A GB298447 A GB 298447A
Authority
GB
United Kingdom
Prior art keywords
reflector
light
rays
bottom plate
ceiling
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
GB10053/28A
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.)
THOMAS WILLETT ROLPH
Original Assignee
THOMAS WILLETT ROLPH
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 THOMAS WILLETT ROLPH filed Critical THOMAS WILLETT ROLPH
Priority to GB10053/28A priority Critical patent/GB298447A/en
Publication of GB298447A publication Critical patent/GB298447A/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)
  • Non-Portable Lighting Devices Or Systems Thereof (AREA)

Abstract

298,447. Stephens, A. J., (Rolph, T. W.). April 3, 1928. Ceiling lamps.-A lens element 2 surrounding the light source 1 reduces the divergence of the light in vertical planes and an enclosing globe comprises a reflector 3 which directs the light vertically on to a bottom plate 4 for distribution. the upper part of the reflector having a light transmitting portion. The lens 2 of cup shape with a prismatic outer surface is held in place against a ledge 14 on the reflector by a, spring 11 and the bottom plate is fastened to the reflector by clips 12. On its inner surface the reflector 3 is of prismatic form giving downward reflection of typical rays C, D and the bottom plate may be constructed as described in Specification 258,482. [Class 75 (ii), Lamp chimneys &c.], to distribute the light uniformly as at C<1>, D'. Light directed upon the bottom of the cup as at G, H is refracted downwardly and distributed at G<1>, H<1>. Rays such as A, B, falling upon the upper portion of the globe are transmitted towards the ceiling while rays such as E, F falling upon reflecting prism between the points 6, 9 on the cup are directed towards the reflector 3 at such angles that they are transmitted upwardly by the prisms of the reflector and add to the illumination of the ceiling.
GB10053/28A 1928-04-03 1928-04-03 Improvements in and relating to illuminating appliances Expired GB298447A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB10053/28A GB298447A (en) 1928-04-03 1928-04-03 Improvements in and relating to illuminating appliances

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB10053/28A GB298447A (en) 1928-04-03 1928-04-03 Improvements in and relating to illuminating appliances

Publications (1)

Publication Number Publication Date
GB298447A true GB298447A (en) 1928-10-11

Family

ID=9960577

Family Applications (1)

Application Number Title Priority Date Filing Date
GB10053/28A Expired GB298447A (en) 1928-04-03 1928-04-03 Improvements in and relating to illuminating appliances

Country Status (1)

Country Link
GB (1) GB298447A (en)

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