GB774753A - Improvements in or relating to electric lighting fittings - Google Patents

Improvements in or relating to electric lighting fittings

Info

Publication number
GB774753A
GB774753A GB18499/55A GB1849955A GB774753A GB 774753 A GB774753 A GB 774753A GB 18499/55 A GB18499/55 A GB 18499/55A GB 1849955 A GB1849955 A GB 1849955A GB 774753 A GB774753 A GB 774753A
Authority
GB
United Kingdom
Prior art keywords
tube
june
surrounded
relating
envelope
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
GB18499/55A
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.)
Philips Electrical Industries Ltd
Original Assignee
Philips Electrical Industries 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 Philips Electrical Industries Ltd filed Critical Philips Electrical Industries Ltd
Publication of GB774753A publication Critical patent/GB774753A/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
    • F21V5/04—Refractors for light sources of lens shape
    • 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
    • F21S8/08—Lighting devices intended for fixed installation with a standard
    • F21S8/085—Lighting devices intended for fixed installation with a standard of high-built type, e.g. street light
    • F21S8/086—Lighting devices intended for fixed installation with a standard of high-built type, e.g. street light with lighting device attached sideways of the standard, e.g. for roads and highways
    • 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
    • F21V7/005—Reflectors for light sources with an elongated shape to cooperate with linear light sources
    • 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)
  • Vessels And Coating Films For Discharge Lamps (AREA)

Abstract

774,753. Discharge lamps. PHILIPS ELECTRICAL INDUSTRIES, Ltd. June 27, 1955 [June 30, 1954], No. 18499/55. Drawings to Specification. Class 39(1). [Also in Group XI] In a lighting fitting (see Group XI) the light source may be a low-pressure sodium vapour discharge lamp surrounded by an envelope containing nitrogen, the envelope being surrounded by an evacuated double-walled glass sheath, or it may be a fluorescent lamp comprising a tube having two superposed layers of fluorescent material, the inner layer extending only part way around the tube to provide a lengthwise strip covered by one layer only, this strip in operation being brighter than the remaining part of the tube.
GB18499/55A 1954-06-30 1955-06-27 Improvements in or relating to electric lighting fittings Expired GB774753A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL774753X 1954-06-30

Publications (1)

Publication Number Publication Date
GB774753A true GB774753A (en) 1957-05-15

Family

ID=19829953

Family Applications (1)

Application Number Title Priority Date Filing Date
GB18499/55A Expired GB774753A (en) 1954-06-30 1955-06-27 Improvements in or relating to electric lighting fittings

Country Status (1)

Country Link
GB (1) GB774753A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102010046082A1 (en) * 2010-09-20 2012-03-22 Perschl & Perschl Lichttechnik Gmbh & Co. Kg Streetlight e.g. sodium vapor light installed in e.g. road, has light source and refraction screen that are arranged at preset spacing such that focal length of light source and refraction screen is equal

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102010046082A1 (en) * 2010-09-20 2012-03-22 Perschl & Perschl Lichttechnik Gmbh & Co. Kg Streetlight e.g. sodium vapor light installed in e.g. road, has light source and refraction screen that are arranged at preset spacing such that focal length of light source and refraction screen is equal
DE102010046082B4 (en) * 2010-09-20 2013-12-05 Perschl & Perschl Lichttechnik Gmbh & Co. Kg street lamp

Similar Documents

Publication Publication Date Title
CA969909A (en) Lighting fitting provided with at least two low-pressure mercury vapour discharge lamps
ES477633A1 (en) Low-pressure mercury vapor discharge lamp with luminescent coatings on envelope walls
ES424718A1 (en) Arrangement for igniting a gas and/or vapour discharge lamp provided with preheatable electrodes
US2355258A (en) Ultraviolet fluorescent lamp
CA1020620A (en) Fluorescent lamp with superposed phosphor layers
GB774753A (en) Improvements in or relating to electric lighting fittings
GB603326A (en) Improved phosphor coating for fluorescent electric discharge lamps
US2009215A (en) Electric discharge device
FR2371774A1 (en) LOW PRESSURE MERCURY VAPOR DISCHARGE LAMP
GB1042184A (en) Fluorescent discharge lamp
GB946544A (en) Improvements in electric discharge lamps
GB2014358A (en) Discharge lamp
ES218776A1 (en) Color-corrected reflector high pressure mercury vapor lamp and method of preparing
ES355561A1 (en) Improvements in the construction of lamps for iluminating elements of luminous material with body of hermetic lamp. (Machine-translation by Google Translate, not legally binding)
GB519145A (en) Improvements in sources of light comprising both an electric discharge tube and an incandescent filament
GB1035593A (en) Improvements in or relating to low-pressure mercury vapour discharge lamps
FR2341942A1 (en) Fluorescent lamp with reflective film under phosphor coating - has two linear, transparent windows free of phosphor and reflective film as light outlets
GB854745A (en) Improvements in or relating to light sources comprising at least one electric vapourdischarge tube
GB460963A (en) Improvements in or relating to means for illumination comprising luminescent materials
GB515464A (en) Improvements in or relating to gas or vapour filled electric discharge tubes
GB1295538A (en)
GB501901A (en) Improvements in sources of light comprising a high-pressure mercury-vapour electric discharge device
ES251304A1 (en) Improvements introduced in the manufacture of electric gas discharge lamps (Machine-translation by Google Translate, not legally binding)
GB441888A (en) Improvements in electric lighting devices
GB999758A (en) Improvements in or relating to fittings for fluorescent lamps