GB493793A - Improvements in trough reflectors - Google Patents

Improvements in trough reflectors

Info

Publication number
GB493793A
GB493793A GB1381137A GB1381137A GB493793A GB 493793 A GB493793 A GB 493793A GB 1381137 A GB1381137 A GB 1381137A GB 1381137 A GB1381137 A GB 1381137A GB 493793 A GB493793 A GB 493793A
Authority
GB
United Kingdom
Prior art keywords
trough
reflector
reflectors
reflect
rods
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
GB1381137A
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to GB1381137A priority Critical patent/GB493793A/en
Publication of GB493793A publication Critical patent/GB493793A/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
    • F21V7/04—Optical design
    • 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
    • F21V7/0016—Reflectors for light sources providing for indirect lighting on lighting devices that also provide for direct lighting, e.g. by means of independent light sources, by splitting of the light beam, by switching between both lighting modes
    • 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
    • F21S8/04—Lighting devices intended for fixed installation intended only for mounting on a ceiling or the like overhead structures
    • F21S8/06—Lighting devices intended for fixed installation intended only for mounting on a ceiling or the like overhead structures by suspension

Abstract

493,793. Reflectors. CURTIS, A. H. May 18, 1937, No. 13811. [Classes 75 (ii) and 75 (iv)] An open-topped trough reflector providing both direct and indirect illumination of a room has in it lamps mounted on a pair of strips 8 slidable lengthwise along a flange 9, and bent as shown to alter, if inverted, the depth of the lamp filaments. The opening may be covered with translucent material 10 to reflect down part of the upward light, and additional reflectors may be used to reflect on to the main reflector direct downward rays, and the trough may be in sections, bolted end to end, and enamelled interiorly or with a parabolic or other reflector inside. Hollow rods 5, (one containing the electric leads), fastened to sleeves surrounding tie-rods 2 between opposite sideplates 1 suspend the trough, so that it may swing freely without damage if accidentally knocked.
GB1381137A 1937-05-18 1937-05-18 Improvements in trough reflectors Expired GB493793A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB1381137A GB493793A (en) 1937-05-18 1937-05-18 Improvements in trough reflectors

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1381137A GB493793A (en) 1937-05-18 1937-05-18 Improvements in trough reflectors

Publications (1)

Publication Number Publication Date
GB493793A true GB493793A (en) 1938-10-14

Family

ID=10029817

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1381137A Expired GB493793A (en) 1937-05-18 1937-05-18 Improvements in trough reflectors

Country Status (1)

Country Link
GB (1) GB493793A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2849595A (en) * 1955-03-16 1958-08-26 Garden City Plating & Mfg Co Fluorescent light fixture

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2849595A (en) * 1955-03-16 1958-08-26 Garden City Plating & Mfg Co Fluorescent light fixture

Similar Documents

Publication Publication Date Title
US2288606A (en) Fluorescent lamp fixture
GB493793A (en) Improvements in trough reflectors
ES194463U (en) A lighting apparatus for use with fluorescent lamps in the form of u. (Machine-translation by Google Translate, not legally binding)
GB543663A (en) Improvements in adjustable reflectors for electric lamps
GB540898A (en) Improvements in fluorescent lighting fittings
GB557154A (en) Improvements in luminaires for fluorescent and other linear electric lamps
GB537898A (en) Improvements in or relating to lighting fittings
GB302917A (en) Improvements in incandescent electric lamps
GB607923A (en) Improvements in and relating to light reflectors and deflectors
GB339818A (en) Electric ceiling lights
GB452009A (en) Improvements in or relating to electric light illuminations
GB388564A (en) Improvements in or relating to lamp reflectors
GB505897A (en) Improvements in and relating to lanterns for electric lamps
GB907514A (en) A lamp shade
GB332107A (en) Improvements in light diffusers for electric incandescent lamps
GB265801A (en) Improvements in electric lamps
GB457863A (en) Improvements in or relating to illuminating devices
GB251801A (en) Improvements in electric light fittings
GB517267A (en) Improvements in or relating to lighting fittings
GB474141A (en) Improvements in and relating to luminairs
GB401034A (en) Improvements in lighting appliances
GB589982A (en) Improvements in or relating to street lamps and the like
GB453983A (en) Improvements in or relating to electric incandescent lamps
GB760885A (en) A lamp for the illumination of surgical operations
GB518217A (en) Improvements in and relating to electric lighting fittings