GB476240A - Improvements in and relating to electric discharge lamps - Google Patents

Improvements in and relating to electric discharge lamps

Info

Publication number
GB476240A
GB476240A GB1565936A GB1565936A GB476240A GB 476240 A GB476240 A GB 476240A GB 1565936 A GB1565936 A GB 1565936A GB 1565936 A GB1565936 A GB 1565936A GB 476240 A GB476240 A GB 476240A
Authority
GB
United Kingdom
Prior art keywords
luminescent material
giving
discharge
excited
gases
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
GB1565936A
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.)
Osram GmbH
Original Assignee
Patent Treuhand Gesellschaft fuer Elektrische Gluehlampen mbH
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 Patent Treuhand Gesellschaft fuer Elektrische Gluehlampen mbH filed Critical Patent Treuhand Gesellschaft fuer Elektrische Gluehlampen mbH
Priority to GB1565936A priority Critical patent/GB476240A/en
Publication of GB476240A publication Critical patent/GB476240A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J61/00—Gas-discharge or vapour-discharge lamps
    • H01J61/02—Details
    • H01J61/38—Devices for influencing the colour or wavelength of the light
    • H01J61/42—Devices for influencing the colour or wavelength of the light by transforming the wavelength of the light by luminescence
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J61/00—Gas-discharge or vapour-discharge lamps
    • H01J61/70—Lamps with low-pressure unconstricted discharge having a cold pressure < 400 Torr
    • H01J61/76—Lamps with low-pressure unconstricted discharge having a cold pressure < 400 Torr having a filling of permanent gas or gases only

Landscapes

  • Discharge Lamp (AREA)

Abstract

476,240. Discharge lamps. GENERAL ELECTRIC CO., Ltd. (Patent-Treuhand-Ges. f³r Elektrische Gl³hlampen) June 4, 1936, No. 15659. [Class 39 (i)] In an elongated discharge lamp of the type adapted to operate at voltages greatly exceeding mains voltage and in which one considerable portion of the light comes from a positive discharge column which occupies the greater part of the distance between the electrodes, and another considerable portion from a layer of luminescent material in contact with and excited by the discharge, the filling is neon with a small proportion, preferably 0À25-2 per cent, of one or more of the gases argon, krypton or xenon, and the luminescent material is one emitting visible light when excited by radiation of 600-1200Š. Other gases, particularly hydrogen and mercury, are excluded. The luminescent material may be willemite (giving yellow or green resultant light), calcium tungstate (giving colours between blue and rose), zinc tungstate (giving approximate white), or mixtures of these. The pressure is preferably between 1À5 and 10 mms., and the current density between 0À01 and 0À1 A/cm<2>. British Specification 457,486, and U.S.A. Specifications 1,990,175 and 2,020,723 are referred to.
GB1565936A 1936-06-04 1936-06-04 Improvements in and relating to electric discharge lamps Expired GB476240A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB1565936A GB476240A (en) 1936-06-04 1936-06-04 Improvements in and relating to electric discharge lamps

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1565936A GB476240A (en) 1936-06-04 1936-06-04 Improvements in and relating to electric discharge lamps

Publications (1)

Publication Number Publication Date
GB476240A true GB476240A (en) 1937-12-06

Family

ID=10063123

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1565936A Expired GB476240A (en) 1936-06-04 1936-06-04 Improvements in and relating to electric discharge lamps

Country Status (1)

Country Link
GB (1) GB476240A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2226444A (en) * 1988-12-22 1990-06-27 Matsushita Electric Works Ltd Electrodeless discharge lamp
EP1326265A1 (en) * 2002-01-08 2003-07-09 Neofa SA Fluorescent lamp
EP1335405A2 (en) * 2002-01-09 2003-08-13 Otto Grolimund Fluorescent lamp

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2226444A (en) * 1988-12-22 1990-06-27 Matsushita Electric Works Ltd Electrodeless discharge lamp
GB2226444B (en) * 1988-12-22 1993-05-12 Matsushita Electric Works Ltd Electrodeless discharge lamp
EP1326265A1 (en) * 2002-01-08 2003-07-09 Neofa SA Fluorescent lamp
EP1335405A2 (en) * 2002-01-09 2003-08-13 Otto Grolimund Fluorescent lamp
EP1335405A3 (en) * 2002-01-09 2006-02-15 Otto Grolimund Fluorescent lamp

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