WO2007122535A3 - A method of manufacturing tungsten electrode rods - Google Patents

A method of manufacturing tungsten electrode rods Download PDF

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Publication number
WO2007122535A3
WO2007122535A3 PCT/IB2007/051300 IB2007051300W WO2007122535A3 WO 2007122535 A3 WO2007122535 A3 WO 2007122535A3 IB 2007051300 W IB2007051300 W IB 2007051300W WO 2007122535 A3 WO2007122535 A3 WO 2007122535A3
Authority
WO
WIPO (PCT)
Prior art keywords
wire
electrode rods
laser beams
tungsten electrode
manufacturing tungsten
Prior art date
Application number
PCT/IB2007/051300
Other languages
French (fr)
Other versions
WO2007122535A2 (en
Inventor
Jurgen Adriaensen
Breeijen Peter M Den
Original Assignee
Koninkl Philips Electronics Nv
Jurgen Adriaensen
Breeijen Peter M Den
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 Koninkl Philips Electronics Nv, Jurgen Adriaensen, Breeijen Peter M Den filed Critical Koninkl Philips Electronics Nv
Publication of WO2007122535A2 publication Critical patent/WO2007122535A2/en
Publication of WO2007122535A3 publication Critical patent/WO2007122535A3/en

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J9/00—Apparatus or processes specially adapted for the manufacture, installation, removal, maintenance of electric discharge tubes, discharge lamps, or parts thereof; Recovery of material from discharge tubes or lamps
    • H01J9/02—Manufacture of electrodes or electrode systems
    • 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

Abstract

A method of manufacturing tungsten electrode rods for a gas discharge lamp, comprising the following steps: aiming a plurality of laser beams in radial direction at the axis of an as-drawn tungsten wire from evenly distributed positions on a circle around the wire, wherein the pulse duration and power of the laser beams are chosen such that a constriction of the wire at said location is obtained without the laser beams cutting through the wire; and breaking the wire into separate electrode rods.
PCT/IB2007/051300 2006-04-21 2007-04-11 A method of manufacturing tungsten electrode rods WO2007122535A2 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
EP06112917.7 2006-04-21
EP06112917 2006-04-21

Publications (2)

Publication Number Publication Date
WO2007122535A2 WO2007122535A2 (en) 2007-11-01
WO2007122535A3 true WO2007122535A3 (en) 2008-05-22

Family

ID=38625383

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/IB2007/051300 WO2007122535A2 (en) 2006-04-21 2007-04-11 A method of manufacturing tungsten electrode rods

Country Status (1)

Country Link
WO (1) WO2007122535A2 (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4840456B2 (en) * 2009-02-06 2011-12-21 ウシオ電機株式会社 High pressure discharge lamp
WO2011073862A1 (en) 2009-12-18 2011-06-23 Koninklijke Philips Electronics N.V. An electrode for use in a lamp
JP5146858B2 (en) * 2010-12-06 2013-02-20 ウシオ電機株式会社 High pressure discharge lamp

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0892423A2 (en) * 1997-07-17 1999-01-20 Ushiodenki Kabushiki Kaisha Discharge lamp of the short arc type and process for production thereof
GB2351602A (en) * 1999-06-25 2001-01-03 Koito Mfg Co Ltd Arc tube manufacture for preventing leaks from arc tube
WO2003001563A1 (en) * 2001-06-25 2003-01-03 Koninklijke Philips Electronics N.V. High-pressure gas discharge lamp and method of manufacturing the same
EP1273379A2 (en) * 2001-07-04 2003-01-08 Fuji Photo Film Co., Ltd. Electrode producing methods
US20060208635A1 (en) * 2005-03-15 2006-09-21 Lenef Alan L Slotted electrode for high intensity discharge lamp

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0892423A2 (en) * 1997-07-17 1999-01-20 Ushiodenki Kabushiki Kaisha Discharge lamp of the short arc type and process for production thereof
GB2351602A (en) * 1999-06-25 2001-01-03 Koito Mfg Co Ltd Arc tube manufacture for preventing leaks from arc tube
WO2003001563A1 (en) * 2001-06-25 2003-01-03 Koninklijke Philips Electronics N.V. High-pressure gas discharge lamp and method of manufacturing the same
EP1273379A2 (en) * 2001-07-04 2003-01-08 Fuji Photo Film Co., Ltd. Electrode producing methods
US20060208635A1 (en) * 2005-03-15 2006-09-21 Lenef Alan L Slotted electrode for high intensity discharge lamp

Also Published As

Publication number Publication date
WO2007122535A2 (en) 2007-11-01

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