EP1465235A2 - Lampe à décharge - Google Patents

Lampe à décharge Download PDF

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Publication number
EP1465235A2
EP1465235A2 EP20040002473 EP04002473A EP1465235A2 EP 1465235 A2 EP1465235 A2 EP 1465235A2 EP 20040002473 EP20040002473 EP 20040002473 EP 04002473 A EP04002473 A EP 04002473A EP 1465235 A2 EP1465235 A2 EP 1465235A2
Authority
EP
European Patent Office
Prior art keywords
electrode
discharge lamp
discharge
section
strand
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.)
Withdrawn
Application number
EP20040002473
Other languages
German (de)
English (en)
Inventor
Thomas Bittmann
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
Publication of EP1465235A2 publication Critical patent/EP1465235A2/fr
Withdrawn legal-status Critical Current

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Classifications

    • 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
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J61/00—Gas-discharge or vapour-discharge lamps
    • H01J61/02—Details
    • H01J61/04—Electrodes; Screens; Shields
    • H01J61/06—Main electrodes
    • H01J61/073—Main electrodes for high-pressure discharge lamps
    • H01J61/0732—Main electrodes for high-pressure discharge lamps characterised by the construction of the electrode
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J61/00—Gas-discharge or vapour-discharge lamps
    • H01J61/02—Details
    • H01J61/36—Seals between parts of vessels; Seals for leading-in conductors; Leading-in conductors
    • H01J61/366—Seals for leading-in conductors
    • H01J61/368—Pinched seals or analogous seals

Definitions

  • the invention relates to a discharge lamp according to the preamble of the claim 1.
  • One end is used for welding to the current feedthrough, while the other end is designed as an electrode head that goes into the interior protrudes into the discharge vessel and on which the discharge arc of the gas discharge attaches.
  • the coupled electrode head offers the discharge arc of the gas discharge a better starting point than the ends of the individual wires.
  • FIG. 2 shows details of the discharge vessel 1 and the current feedthroughs 2 or 3.
  • the sealed ends 11, 12 of the discharge vessel 1 each have one Power bushing 2, 3 on.
  • the current feedthroughs 2, 3 each have a gas-tight seal molybdenum foil 21 or 31 embedded in the respective end 11 or 12.
  • the side of the respective side facing away from the interior 10 of the discharge vessel 1 Molybdenum foil 21 or 31 is welded to a molybdenum wire 22 or 32, which protrudes from the corresponding sealed end 11 or 12.
  • the side of the respective one facing the interior 10 of the discharge vessel 1 Molybdenum foil 21 and 31 is welded to an electrode 4 and 5, respectively protrude into the discharge space 10.
  • Both electrodes 4, 5 are designed as strands. They each consist of eight tungsten wires that are woven together or are twisted. To achieve the purpose of the invention, it would suffice to use only that extending into the sealed end 11 of the discharge vessel 1 403 to form the electrode 4 as a strand.
  • FIG. 3 is a schematic representation of a top view of the electrode 4 produced in this way shown.
  • This electrode has a thickness of 0.35 mm.
  • the electrode 4 according to the invention with a conventional solid, Comparable rod-shaped electrode made of tungsten, which has a diameter of 0.28 mm.
  • the eight tungsten wires each describe a helix, which extends from the first end 401 to the second 402 of the electrode 4.

Landscapes

  • Vessels And Coating Films For Discharge Lamps (AREA)
EP20040002473 2003-03-25 2004-02-04 Lampe à décharge Withdrawn EP1465235A2 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10313514 2003-03-25
DE2003113514 DE10313514A1 (de) 2003-03-25 2003-03-25 Entladungslampe

Publications (1)

Publication Number Publication Date
EP1465235A2 true EP1465235A2 (fr) 2004-10-06

Family

ID=32842166

Family Applications (1)

Application Number Title Priority Date Filing Date
EP20040002473 Withdrawn EP1465235A2 (fr) 2003-03-25 2004-02-04 Lampe à décharge

Country Status (2)

Country Link
EP (1) EP1465235A2 (fr)
DE (1) DE10313514A1 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2006099850A3 (fr) * 2005-03-22 2007-04-26 Patent Treuhand Ges Fuer Elektrische Gluehlampen Mbh Lampe comportant une alimentation electrique et une electrode
WO2007055958A2 (fr) 2005-11-09 2007-05-18 General Electric Company Lampe à décharge à haute intensité avec contrôle de fissurage amélioré et procédé de fabrication
WO2008119375A1 (fr) * 2007-03-29 2008-10-09 Patent-Treuhand-Gesellschaft für elektrische Glühlampen mbH Lampe à décharge, notamment lampe à décharge haute pression
NL2004204A (en) * 2009-02-09 2010-08-10 Ushio Electric Inc High pressure discharge lamp.

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2006099850A3 (fr) * 2005-03-22 2007-04-26 Patent Treuhand Ges Fuer Elektrische Gluehlampen Mbh Lampe comportant une alimentation electrique et une electrode
WO2007055958A2 (fr) 2005-11-09 2007-05-18 General Electric Company Lampe à décharge à haute intensité avec contrôle de fissurage amélioré et procédé de fabrication
WO2007055958A3 (fr) * 2005-11-09 2007-09-20 Gen Electric Lampe à décharge à haute intensité avec contrôle de fissurage amélioré et procédé de fabrication
US7952283B2 (en) 2005-11-09 2011-05-31 General Electric Company High intensity discharge lamp with improved crack control and method of manufacture
WO2008119375A1 (fr) * 2007-03-29 2008-10-09 Patent-Treuhand-Gesellschaft für elektrische Glühlampen mbH Lampe à décharge, notamment lampe à décharge haute pression
NL2004204A (en) * 2009-02-09 2010-08-10 Ushio Electric Inc High pressure discharge lamp.
US8115389B2 (en) 2009-02-09 2012-02-14 Ushio Denki Kabushiki Kaisha High pressure discharge lamp

Also Published As

Publication number Publication date
DE10313514A1 (de) 2004-10-14

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