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EP1469506A3 - Method for forming cold spot region and discharge lamp with such cold spot region - Google Patents

Method for forming cold spot region and discharge lamp with such cold spot region Download PDF

Info

Publication number
EP1469506A3
EP1469506A3 EP04252134A EP04252134A EP1469506A3 EP 1469506 A3 EP1469506 A3 EP 1469506A3 EP 04252134 A EP04252134 A EP 04252134A EP 04252134 A EP04252134 A EP 04252134A EP 1469506 A3 EP1469506 A3 EP 1469506A3
Authority
EP
European Patent Office
Prior art keywords
spot region
tubular extension
cold spot
discharge tube
discharge lamp
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.)
Ceased
Application number
EP04252134A
Other languages
German (de)
French (fr)
Other versions
EP1469506A2 (en
Inventor
Janos Bajnok
Sandor Lukacs
Andras Horvath
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.)
General Electric Co
Original Assignee
General Electric Co
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
Priority claimed from HU0301023A external-priority patent/HU0301023D0/en
Application filed by General Electric Co filed Critical General Electric Co
Publication of EP1469506A2 publication Critical patent/EP1469506A2/en
Publication of EP1469506A3 publication Critical patent/EP1469506A3/en
Ceased 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
    • H01J61/30—Vessels; Containers
    • H01J61/32—Special longitudinal shape, e.g. for advertising purposes
    • H01J61/327—"Compact"-lamps, i.e. lamps having a folded discharge path
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J61/00—Gas-discharge or vapour-discharge lamps
    • H01J61/02—Details
    • H01J61/24—Means for obtaining or maintaining the desired pressure within the vessel
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J61/00—Gas-discharge or vapour-discharge lamps
    • H01J61/02—Details
    • H01J61/30—Vessels; Containers
    • H01J61/33—Special shape of cross-section, e.g. for producing cool spot
    • 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
    • H01J61/72—Lamps with low-pressure unconstricted discharge having a cold pressure < 400 Torr having a main light-emitting filling of easily vaporisable metal vapour, e.g. mercury
    • 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
    • H01J9/24—Manufacture or joining of vessels, leading-in conductors or bases
    • H01J9/245—Manufacture or joining of vessels, leading-in conductors or bases specially adapted for gas discharge tubes or lamps
    • H01J9/247—Manufacture or joining of vessels, leading-in conductors or bases specially adapted for gas discharge tubes or lamps specially adapted for gas-discharge lamps
    • 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
    • H01J9/40—Closing vessels

Landscapes

  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Vessels And Coating Films For Discharge Lamps (AREA)

Abstract

A method for forming a cold spot region on a discharge tube (2) of a discharge lamp is disclosed In the method, a discharge tube (2) is formed, and a tubular extension (18) is formed on at least one end of the discharge tube (2). The tubular extension (18) has a smaller diameter than the diameter of the discharge tube end. The tubular extension (18) is formed so that a free end of the tubular extension (18) extends away from the end of the discharge tube (2). A reduced thickness portion (36) is formed on the tubular extension (18). The reduced thickness portion (36) is formed as a membrane (38).
A discharge lamp is also disclosed, which comprises a discharge tube (2) with a tubular extension (18) located at an end of the discharge tube (2). The tubular extension (18) has a smaller diameter than the diameter of the discharge tube end, and the tubular extension (18) comprises a reduced thickness portion (36). The reduced thickness portion (36) is a membrane (38), preferably formed of the material of the tubular extension (18).
EP04252134A 2003-04-16 2004-04-08 Method for forming cold spot region and discharge lamp with such cold spot region Ceased EP1469506A3 (en)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
HU0301023A HU0301023D0 (en) 2003-04-16 2003-04-16 Cold spot arrangement in compact discharge lamp
HU0301023 2003-04-16
US751156 2004-01-02
US10/751,156 US7227303B2 (en) 2003-04-16 2004-01-02 Method for forming cold spot region and discharge lamp with such cold spot region

Publications (2)

Publication Number Publication Date
EP1469506A2 EP1469506A2 (en) 2004-10-20
EP1469506A3 true EP1469506A3 (en) 2010-03-03

Family

ID=89981314

Family Applications (1)

Application Number Title Priority Date Filing Date
EP04252134A Ceased EP1469506A3 (en) 2003-04-16 2004-04-08 Method for forming cold spot region and discharge lamp with such cold spot region

Country Status (2)

Country Link
EP (1) EP1469506A3 (en)
CN (1) CN1551286B (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2006302589A (en) * 2005-04-19 2006-11-02 Osram-Melco Ltd Compact self-ballasted fluorescent lamp
KR101292119B1 (en) * 2012-03-21 2013-08-09 강성석 Method of manufacturing fluorescent lamp and fluorescent lamp manufactured by this method

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2561838A (en) * 1949-10-28 1951-07-24 Gen Electric Tipping-off method
US3313610A (en) * 1964-07-09 1967-04-11 Westinghouse Electric Corp Method of tipping-off exhaust tubing
JPS5897239A (en) * 1981-12-02 1983-06-09 Toshiba Corp Bulb and its manufacture
JPH01243339A (en) * 1988-03-25 1989-09-28 Matsushita Electron Corp Manufacture of fluorescent lamp
EP1160829A1 (en) * 2000-06-01 2001-12-05 General Electric Company Fluorescent lamp with discharge tube bent substantially in a plane

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3262068D1 (en) * 1981-01-27 1985-03-14 Emi Plc Thorn Discharge lamp

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2561838A (en) * 1949-10-28 1951-07-24 Gen Electric Tipping-off method
US3313610A (en) * 1964-07-09 1967-04-11 Westinghouse Electric Corp Method of tipping-off exhaust tubing
JPS5897239A (en) * 1981-12-02 1983-06-09 Toshiba Corp Bulb and its manufacture
JPH01243339A (en) * 1988-03-25 1989-09-28 Matsushita Electron Corp Manufacture of fluorescent lamp
EP1160829A1 (en) * 2000-06-01 2001-12-05 General Electric Company Fluorescent lamp with discharge tube bent substantially in a plane

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 007, no. 194 (E - 195) 24 August 1983 (1983-08-24) *
PATENT ABSTRACTS OF JAPAN vol. 013, no. 578 (E - 864) 20 December 1989 (1989-12-20) *

Also Published As

Publication number Publication date
CN1551286A (en) 2004-12-01
CN1551286B (en) 2012-08-08
EP1469506A2 (en) 2004-10-20

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