GB1498258A - High pressure mercury vapour discharge lamp - Google Patents

High pressure mercury vapour discharge lamp

Info

Publication number
GB1498258A
GB1498258A GB1916675A GB1916675A GB1498258A GB 1498258 A GB1498258 A GB 1498258A GB 1916675 A GB1916675 A GB 1916675A GB 1916675 A GB1916675 A GB 1916675A GB 1498258 A GB1498258 A GB 1498258A
Authority
GB
United Kingdom
Prior art keywords
volatile
halide
halides
vapour
alkali
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
GB1916675A
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 Electronics UK Ltd
Original Assignee
Philips Electronic and Associated 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 Electronic and Associated Industries Ltd filed Critical Philips Electronic and Associated Industries Ltd
Publication of GB1498258A publication Critical patent/GB1498258A/en
Expired legal-status Critical Current

Links

Classifications

    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01JELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J61/00Gas-discharge or vapour-discharge lamps
    • H01J61/02Details
    • H01J61/12Selection of substances for gas fillings; Specified operating pressure or temperature
    • H01J61/18Selection of substances for gas fillings; Specified operating pressure or temperature having a metallic vapour as the principal constituent

Landscapes

  • Discharge Lamp (AREA)

Abstract

1498258 Metal vapour lamps PHILIPS ELECTRONIC & ASSOCIATED INDUSTRIES Ltd 7 May 1975 [9 May 1974] 19166/75 Heading H1D In a high pressure Hg lamp, with or without electrodes, the volatility of the alkali or alkali earth metal halide (Cl, Br, I) responsible for light emision is increased by introducing volatile Al halide (Cl, Br, I) forming a gaseous compound with the first halide. In two designs of conventional double-walled envelope 400 W HP lamp running with silica arc tube wall temperature of 700-800‹ C., containing Hg and inert gas (e.g. Ar), NaI is made volatile with AlCl 3 or NaBr by AlBr 3 , combined chlorides being efficient but tending to attack W electrodes, leading to wall blackening. The molar proportions of the two halides should be near 1 :1. Octer volatile-halide-forming metals may be partially substituted for Al; in general a highly volatile halide which forms a dimer in the vapour and a poorly volatile halide which also forms a dimer in the vapour are likely to combine to form a volatile letrodimer : volatile halides of Fe<SP>+++</SP>, Tl<SP>+</SP>, In<SP>+++</SP>, Sn<SP>++</SP> are suitable. With Na halide present, the increased volatility tends to shift the colour temperature, but this may be compensated by varying the composition of the volatile halides. Other alkali metal or alkali earth metal halides together with other poorly volatile halides (other than-F) such as those of Cd, Ga, Sc, Y or rare earths may also be substituted for Na halide.
GB1916675A 1974-05-09 1975-05-07 High pressure mercury vapour discharge lamp Expired GB1498258A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19742422411 DE2422411A1 (en) 1974-05-09 1974-05-09 HIGH PRESSURE MERCURY VAPOR DISCHARGE LAMP

Publications (1)

Publication Number Publication Date
GB1498258A true GB1498258A (en) 1978-01-18

Family

ID=5915050

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1916675A Expired GB1498258A (en) 1974-05-09 1975-05-07 High pressure mercury vapour discharge lamp

Country Status (8)

Country Link
JP (1) JPS50152578A (en)
BE (1) BE828831A (en)
BR (1) BR7502888A (en)
DE (1) DE2422411A1 (en)
FR (1) FR2270673B1 (en)
GB (1) GB1498258A (en)
IT (1) IT1037912B (en)
NL (1) NL7505275A (en)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2237927A (en) * 1989-11-08 1991-05-15 Matsushita Electric Works Ltd High intensity discharge lamp
US5256940A (en) * 1989-11-08 1993-10-26 Matsushita Electric Works, Ltd. High intensity discharge lamp device
US5394059A (en) * 1991-11-21 1995-02-28 Oshiodenki Kabushiki Kaisha Metallic vapor discharge lamp and a method for curing paints and inks therewith
EP1001451A1 (en) * 1998-11-10 2000-05-17 Osram Sylvania Inc. Arc discharge lamp containing barium and having an arc tube of yttrium, gadolinium or terbium oxide
WO2003060949A1 (en) * 2002-01-15 2003-07-24 Koninklijke Philips Electronics N.V. Metal-halide lamp
GB2387267A (en) * 2001-12-03 2003-10-08 Gen Electric Cermaic metal halide lamp
WO2007078786A2 (en) * 2005-12-16 2007-07-12 General Electric Company Ceramic metal halide lamp

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5231583A (en) * 1975-09-05 1977-03-10 Toshiba Corp Lamp discharging metallic fumes
DE2655167C2 (en) * 1976-12-06 1986-12-18 Patent-Treuhand-Gesellschaft für elektrische Glühlampen mbH, 8000 München High pressure discharge lamp with metal halides
DE2725297C3 (en) * 1977-06-04 1980-10-16 Philips Patentverwaltung Gmbh, 2000 Hamburg High pressure mercury vapor discharge lamp
DD203430A1 (en) * 1982-01-19 1983-10-19 Kloss ELECTRODE STABILIZED HIGH-PRESSURE DISCHARGE LAMP WITH LIGHTING ACCESSORIES
DE3506295A1 (en) * 1985-02-22 1986-08-28 Patent-Treuhand-Gesellschaft für elektrische Glühlampen mbH, 8000 München COMPACT HIGH PRESSURE DISCHARGE LAMP
US4801846A (en) * 1986-12-19 1989-01-31 Gte Laboratories Incorporated Rare earth halide light source with enhanced red emission
US5013968A (en) * 1989-03-10 1991-05-07 General Electric Company Reprographic metal halide lamps having long life and maintenance
DE4132530A1 (en) * 1991-09-30 1993-04-01 Patent Treuhand Ges Fuer Elektrische Gluehlampen Mbh HIGH PRESSURE DISCHARGE LAMP WITH LOW POWER
US5212424A (en) * 1991-11-21 1993-05-18 General Electric Company Metal halide discharge lamp containing a sodium getter
US5451838A (en) * 1994-03-03 1995-09-19 Hamamatsu Photonics K.K. Metal halide lamp
DE19645959A1 (en) * 1996-11-07 1998-05-14 Patent Treuhand Ges Fuer Elektrische Gluehlampen Mbh Metal halide high pressure discharge lamp

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1444023A (en) * 1973-01-23 1976-07-28 Thorn Electrical Ind Ltd Electric discharge lamps

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2237927A (en) * 1989-11-08 1991-05-15 Matsushita Electric Works Ltd High intensity discharge lamp
US5256940A (en) * 1989-11-08 1993-10-26 Matsushita Electric Works, Ltd. High intensity discharge lamp device
GB2237927B (en) * 1989-11-08 1994-09-21 Matsushita Electric Works Ltd High intensity discharge lamp device
US5394059A (en) * 1991-11-21 1995-02-28 Oshiodenki Kabushiki Kaisha Metallic vapor discharge lamp and a method for curing paints and inks therewith
EP1001451A1 (en) * 1998-11-10 2000-05-17 Osram Sylvania Inc. Arc discharge lamp containing barium and having an arc tube of yttrium, gadolinium or terbium oxide
GB2387267A (en) * 2001-12-03 2003-10-08 Gen Electric Cermaic metal halide lamp
GB2387267B (en) * 2001-12-03 2007-09-05 Gen Electric Ceramic metal halide lamp
WO2003060949A1 (en) * 2002-01-15 2003-07-24 Koninklijke Philips Electronics N.V. Metal-halide lamp
WO2007078786A2 (en) * 2005-12-16 2007-07-12 General Electric Company Ceramic metal halide lamp
WO2007078786A3 (en) * 2005-12-16 2008-08-14 Gen Electric Ceramic metal halide lamp

Also Published As

Publication number Publication date
NL7505275A (en) 1975-11-11
FR2270673B1 (en) 1979-04-06
BE828831A (en) 1975-11-07
JPS50152578A (en) 1975-12-08
IT1037912B (en) 1979-11-20
FR2270673A1 (en) 1975-12-05
BR7502888A (en) 1976-03-16
DE2422411A1 (en) 1975-12-11

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Legal Events

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