GB631304A - Improvements in and relating to interior electric lighting fittings - Google Patents

Improvements in and relating to interior electric lighting fittings

Info

Publication number
GB631304A
GB631304A GB33151/47A GB3315147A GB631304A GB 631304 A GB631304 A GB 631304A GB 33151/47 A GB33151/47 A GB 33151/47A GB 3315147 A GB3315147 A GB 3315147A GB 631304 A GB631304 A GB 631304A
Authority
GB
United Kingdom
Prior art keywords
light
switchboard
electric lighting
direct
flux
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
GB33151/47A
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.)
HAROLD EDGAR BELLCHAMBERS
JAMES CARSTAIRS LOWSON
British Thomson Houston Co Ltd
Original Assignee
HAROLD EDGAR BELLCHAMBERS
JAMES CARSTAIRS LOWSON
British Thomson Houston Co Ltd
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 HAROLD EDGAR BELLCHAMBERS, JAMES CARSTAIRS LOWSON, British Thomson Houston Co Ltd filed Critical HAROLD EDGAR BELLCHAMBERS
Priority to GB33151/47A priority Critical patent/GB631304A/en
Publication of GB631304A publication Critical patent/GB631304A/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
    • F21V7/00—Reflectors for light sources
    • F21V7/0008—Reflectors for light sources providing for indirect lighting
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S8/00—Lighting devices intended for fixed installation
    • F21S8/02—Lighting devices intended for fixed installation of recess-mounted type, e.g. downlighters
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21W—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO USES OR APPLICATIONS OF LIGHTING DEVICES OR SYSTEMS
    • F21W2111/00—Use or application of lighting devices or systems for signalling, marking or indicating, not provided for in codes F21W2102/00 – F21W2107/00
    • 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

631,304. Electric lighting fittings. BRITISH THOMSON - HOUSTON CO., Ltd., LOWSON, J. C., and BELLCHAMBERS, H. K Dec. 16, 1947, No. 33151. '[Class 15(iv)] [Also in Group XXXVIII] An electric lighting fitting 1 illuminating a vertical surface 4, and a horizontal surface 6, as of a switchboard 5, comprises a linear light source 2a, 2b arranged above, behind, and close to the said surfaces so that no direct light flux can fall upon them, a diffusing reflecting surface 10 being arranged to direct a portion of the light source flux in a downward direction through louvres 11a, 11b, 11c, to produce an even distribution of light upon the surfaces 4, 6. Additionally the switchboard 5 is illuminated from the ceiling plane 8, 8<SP>1</SP> and the upper walls 9, 9<SP>1</SP> through a reflector 7 disposed behind the lamps 2a, 2b to reflect light upon those surfaces. To enable the indicator lamps 13 of the switchboard to give a clearly visible signal when switched on, under a high level of board illumination, an angularly set cover 14 (Fig. 2) is provided for each lamp, the cover having a window 15 of translucent diffusing material which efficiently transmits light from an indicator lamp bulb 16 but which has a poor reflecting characteristic with regard to light received from any external source.
GB33151/47A 1947-12-16 1947-12-16 Improvements in and relating to interior electric lighting fittings Expired GB631304A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB33151/47A GB631304A (en) 1947-12-16 1947-12-16 Improvements in and relating to interior electric lighting fittings

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB33151/47A GB631304A (en) 1947-12-16 1947-12-16 Improvements in and relating to interior electric lighting fittings

Publications (1)

Publication Number Publication Date
GB631304A true GB631304A (en) 1949-11-01

Family

ID=10349204

Family Applications (1)

Application Number Title Priority Date Filing Date
GB33151/47A Expired GB631304A (en) 1947-12-16 1947-12-16 Improvements in and relating to interior electric lighting fittings

Country Status (1)

Country Link
GB (1) GB631304A (en)

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