GB1502612A - Discharge lamps containing an inert gas and a metal halid - Google Patents

Discharge lamps containing an inert gas and a metal halid

Info

Publication number
GB1502612A
GB1502612A GB25471/74A GB2547174A GB1502612A GB 1502612 A GB1502612 A GB 1502612A GB 25471/74 A GB25471/74 A GB 25471/74A GB 2547174 A GB2547174 A GB 2547174A GB 1502612 A GB1502612 A GB 1502612A
Authority
GB
United Kingdom
Prior art keywords
halide
june
tube
metal
inert gas
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
GB25471/74A
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.)
Thorn Electrical Industries Ltd
Original Assignee
Thorn 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 Thorn Electrical Industries Ltd filed Critical Thorn Electrical Industries Ltd
Priority to GB25471/74A priority Critical patent/GB1502612A/en
Priority to AU81853/75A priority patent/AU501780B2/en
Priority to NL7506708A priority patent/NL7506708A/en
Priority to CA228,708A priority patent/CA1037097A/en
Priority to ZA00753665A priority patent/ZA753665B/en
Priority to DE2525408A priority patent/DE2525408C3/en
Priority to IT24098/75A priority patent/IT1038753B/en
Priority to JP50067687A priority patent/JPS5110682A/ja
Priority to FR7517960A priority patent/FR2274139A1/en
Publication of GB1502612A publication Critical patent/GB1502612A/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
    • H01J61/12—Selection of substances for gas fillings; Specified operating pressure or temperature
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J61/00—Gas-discharge or vapour-discharge lamps
    • H01J61/82—Lamps with high-pressure unconstricted discharge having a cold pressure > 400 Torr
    • H01J61/827—Metal halide arc lamps

Landscapes

  • Discharge Lamp (AREA)
  • Discharge Lamps And Accessories Thereof (AREA)

Abstract

1502612 Metal vapour lamps THORN ELECTRICAL INDUSTRIES Ltd 9 June 1975 [7 June 1974] 25471/74 Heading H1D To maintain arc stability with no or minimal ballast in a discharge lamp filled with Xe and/or Kr at 300-500 Torr cold-fill pressure plus a metal halide, the current density is made to exceed 16 ma./mm.<SP>2</SP>, based on the cross-section of the tube, by sufficient margin to cause the differential resistance dV/dI to become positive. The metal halide added in excess as the compound or elements is preferably a halide of any of Na, Li, Cd, Zn, Mn, In, Tl, Ga, Sn, Pb. In the Figure relating to a tube of 4 mm. bore, the transaction to positive slope occurs at 1A or 80 mA/mm.<SP>2</SP> with Xe and the halide indicated against the respective V-I curve. Luminous efficiences up to 125 L/W are attainable. The lamps are tubular, of quartz with pure or thoriated W electrodes (Fig. 2, not shown).
GB25471/74A 1974-06-07 1974-06-07 Discharge lamps containing an inert gas and a metal halid Expired GB1502612A (en)

Priority Applications (9)

Application Number Priority Date Filing Date Title
GB25471/74A GB1502612A (en) 1974-06-07 1974-06-07 Discharge lamps containing an inert gas and a metal halid
AU81853/75A AU501780B2 (en) 1974-06-07 1975-06-04 Discharge lamps containing an inert gas anda metal halide
NL7506708A NL7506708A (en) 1974-06-07 1975-06-05 DISCHARGE LAMP WITH AN INERT GAS AND A METAL HALOGENIDE.
CA228,708A CA1037097A (en) 1974-06-07 1975-06-06 Discharge lamps containing an inert gas and a metal halide
ZA00753665A ZA753665B (en) 1974-06-07 1975-06-06 Discharge lamps containing an inert gas and a metal halide
DE2525408A DE2525408C3 (en) 1974-06-07 1975-06-06 High pressure noble gas discharge lamp
IT24098/75A IT1038753B (en) 1974-06-07 1975-06-06 ELECTRIC GAS DISCHARGE BULB
JP50067687A JPS5110682A (en) 1974-06-07 1975-06-06
FR7517960A FR2274139A1 (en) 1974-06-07 1975-06-09 DISCHARGE LAMP CONTAINING AN INERT GAS AND A METAL HALOGENIDE

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB25471/74A GB1502612A (en) 1974-06-07 1974-06-07 Discharge lamps containing an inert gas and a metal halid

Publications (1)

Publication Number Publication Date
GB1502612A true GB1502612A (en) 1978-03-01

Family

ID=10228252

Family Applications (1)

Application Number Title Priority Date Filing Date
GB25471/74A Expired GB1502612A (en) 1974-06-07 1974-06-07 Discharge lamps containing an inert gas and a metal halid

Country Status (9)

Country Link
JP (1) JPS5110682A (en)
AU (1) AU501780B2 (en)
CA (1) CA1037097A (en)
DE (1) DE2525408C3 (en)
FR (1) FR2274139A1 (en)
GB (1) GB1502612A (en)
IT (1) IT1038753B (en)
NL (1) NL7506708A (en)
ZA (1) ZA753665B (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1032010A1 (en) * 1998-09-16 2000-08-30 Matsushita Electric Industrial Co., Ltd. Anhydrous silver halide lamp
US6653801B1 (en) 1979-11-06 2003-11-25 Matsushita Electric Industrial Co., Ltd. Mercury-free metal-halide lamp
WO2006068887A2 (en) * 2004-12-20 2006-06-29 General Electric Company Mercury-free and sodium-free compositions and radiation sources incorporating same
US7825598B2 (en) 2004-12-20 2010-11-02 General Electric Company Mercury-free discharge compositions and lamps incorporating Titanium, Zirconium, and Hafnium
US7928669B2 (en) 2008-02-08 2011-04-19 General Electric Company Color control of a discharge lamp during dimming

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5691368A (en) * 1979-12-24 1981-07-24 Toshiba Corp Metal halide lamp
US4783615A (en) * 1985-06-26 1988-11-08 General Electric Company Electrodeless high pressure sodium iodide arc lamp
EP1002450B1 (en) 1997-08-05 2002-10-16 Patent-Treuhand-Gesellschaft für elektrische Glühlampen mbH Method for operating a direct current metal halogen arc lamp and circuit pertaining thereto

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6653801B1 (en) 1979-11-06 2003-11-25 Matsushita Electric Industrial Co., Ltd. Mercury-free metal-halide lamp
EP1032010A1 (en) * 1998-09-16 2000-08-30 Matsushita Electric Industrial Co., Ltd. Anhydrous silver halide lamp
EP1032010A4 (en) * 1998-09-16 2001-11-28 Matsushita Electric Ind Co Ltd Anhydrous silver halide lamp
WO2006068887A2 (en) * 2004-12-20 2006-06-29 General Electric Company Mercury-free and sodium-free compositions and radiation sources incorporating same
WO2006068887A3 (en) * 2004-12-20 2007-05-24 Gen Electric Mercury-free and sodium-free compositions and radiation sources incorporating same
US7825598B2 (en) 2004-12-20 2010-11-02 General Electric Company Mercury-free discharge compositions and lamps incorporating Titanium, Zirconium, and Hafnium
US7847484B2 (en) 2004-12-20 2010-12-07 General Electric Company Mercury-free and sodium-free compositions and radiation source incorporating same
US7928669B2 (en) 2008-02-08 2011-04-19 General Electric Company Color control of a discharge lamp during dimming

Also Published As

Publication number Publication date
FR2274139A1 (en) 1976-01-02
AU8185375A (en) 1976-12-09
ZA753665B (en) 1976-05-26
JPS5110682A (en) 1976-01-28
DE2525408C3 (en) 1980-02-28
FR2274139B1 (en) 1979-06-22
DE2525408A1 (en) 1975-12-18
DE2525408B2 (en) 1979-06-21
IT1038753B (en) 1979-11-30
AU501780B2 (en) 1979-06-28
NL7506708A (en) 1975-12-09
CA1037097A (en) 1978-08-22

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Legal Events

Date Code Title Description
PS Patent sealed
PCNP Patent ceased through non-payment of renewal fee