GB537487A - Improvements in or relating to shades or screens for lighting devices - Google Patents

Improvements in or relating to shades or screens for lighting devices

Info

Publication number
GB537487A
GB537487A GB3277639A GB3277639A GB537487A GB 537487 A GB537487 A GB 537487A GB 3277639 A GB3277639 A GB 3277639A GB 3277639 A GB3277639 A GB 3277639A GB 537487 A GB537487 A GB 537487A
Authority
GB
United Kingdom
Prior art keywords
screen
screens
shade
shades
relating
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
GB3277639A
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.)
CLEMENT HELLEGERS
Original Assignee
CLEMENT HELLEGERS
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 CLEMENT HELLEGERS filed Critical CLEMENT HELLEGERS
Priority to GB3277639A priority Critical patent/GB537487A/en
Publication of GB537487A publication Critical patent/GB537487A/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
    • F21V11/00—Screens not covered by groups F21V1/00, F21V3/00, F21V7/00 or F21V9/00
    • 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
    • F21V11/00—Screens not covered by groups F21V1/00, F21V3/00, F21V7/00 or F21V9/00
    • F21V11/16—Screens not covered by groups F21V1/00, F21V3/00, F21V7/00 or F21V9/00 using sheets without apertures, e.g. fixed

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Illuminated Signs And Luminous Advertising (AREA)

Abstract

537,487. Lamp screens. PARSONS, C. S. (Hellegers, C.). Dec. 22, 1939, No. 32776. [Class 75 (ii)] A screen for lamps comprises an opaque cylindrical member a, a<SP>1</SP> surrounding the light source and suspended from a shade t by springs s attached to lever hooks u pivoted upon U-shape springs h engaging with the underside of the shade t. A light transmitting member o made for example of woven glass or glass wool is arranged within the lower part of the screen. A cylindrical adjustable member i is arranged in the upper part of the screen and is spaced therefrom by means of vertical ribs to provide spaces for the circulation of air communicating with the interior. of the screen by apertures p and with the atmosphere at the top of the screen.
GB3277639A 1939-12-22 1939-12-22 Improvements in or relating to shades or screens for lighting devices Expired GB537487A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB3277639A GB537487A (en) 1939-12-22 1939-12-22 Improvements in or relating to shades or screens for lighting devices

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB3277639A GB537487A (en) 1939-12-22 1939-12-22 Improvements in or relating to shades or screens for lighting devices

Publications (1)

Publication Number Publication Date
GB537487A true GB537487A (en) 1941-06-24

Family

ID=10343825

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3277639A Expired GB537487A (en) 1939-12-22 1939-12-22 Improvements in or relating to shades or screens for lighting devices

Country Status (1)

Country Link
GB (1) GB537487A (en)

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