EP0517304A2 - Lampe de décharge de gaz à haute pression - Google Patents

Lampe de décharge de gaz à haute pression Download PDF

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Publication number
EP0517304A2
EP0517304A2 EP92201518A EP92201518A EP0517304A2 EP 0517304 A2 EP0517304 A2 EP 0517304A2 EP 92201518 A EP92201518 A EP 92201518A EP 92201518 A EP92201518 A EP 92201518A EP 0517304 A2 EP0517304 A2 EP 0517304A2
Authority
EP
European Patent Office
Prior art keywords
outer bulb
insulator
lamp
discharge vessel
enveloped
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Withdrawn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
EP92201518A
Other languages
German (de)
English (en)
Other versions
EP0517304A3 (en
Inventor
Josef Jan-Baptist Maria Vervoort
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.)
Koninklijke Philips NV
Original Assignee
Philips Gloeilampenfabrieken NV
Koninklijke Philips Electronics NV
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 Gloeilampenfabrieken NV, Koninklijke Philips Electronics NV filed Critical Philips Gloeilampenfabrieken NV
Publication of EP0517304A2 publication Critical patent/EP0517304A2/fr
Publication of EP0517304A3 publication Critical patent/EP0517304A3/en
Withdrawn legal-status Critical Current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
    • H01J61/02—Details
    • H01J61/36—Seals between parts of vessels; Seals for leading-in conductors; Leading-in conductors
    • 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
    • H01J61/34—Double-wall vessels or containers

Definitions

  • the invention relates to a high-pressure gas discharge lamp comprising: an outer bulb which is closed in a vacuum-tight manner and has a seal at a first end thereof; a lamp cap which is provided with contacts and in which the first end of the outer bulb is fixed; a discharge vessel which is closed in a vacuum-tight manner and is provided with an ionizable filling and with electrodes which are connected to a first and a second current lead, which leads issue from the discharge vessel adjacent to and remote from the first end of the outer bulb, respectively; a first and a second current supply conductor which are connected to respective contacts of the lamp cap and which extend through the seal at the first end of the outer bulb to the first and second current lead, respectively, a portion of the second current supply conductor being enveloped by an insulator inside the outer bulb, which insulator is anchored in the seal of the outer bulb.
  • Such a high pressure gas discharge lamp is known from EP 0 381 279.
  • the invention has for its object to provide a high pressure discharge lamp of the kind described in the opening paragraph in which the risk of flash-over in the outer bulb is counteracted.
  • this object is realized in that the first current lead is enveloped by an insulator at the area where it issues from the discharge vessel, which insulator is fastened to the discharge vessel.
  • the spacing between bare portions of the second current supply conductor on the one hand and of the first current lead on the other hand is greater than in the absence of the insulator around said current lead.
  • the risk of an applied voltage leading to flash-over instead of causing the lamp to ignite is thus considerably reduced.
  • the relevant insulator for example a ceramic tube, may be fixed to the discharge vessel by means of, for example, an adhesive, for example with an enamel.
  • a glass insulator may be used.
  • a glass, for example quartz glass, tube may be connected to the discharge vessel, for example by means of fusion.
  • the high-pressure gas discharge lamp in the drawing has a vacuum-tight outer bulb 1 with a seal 2 at a first end 3.
  • a lamp cap 4 provided with contacts 5 is fixed around the first end of the outer bulb.
  • a discharge vessel 6 is closed in a vacuum-tight manner and provided with an ionizable filling and with electrodes 7 which are connected to a first 8 and a second 9 current lead, which issue from the discharge vessel adjacent to and remote from the first end 3 of the outer bulb 1, respectively, said discharge vessel being accommodated in the outer bulb.
  • a first 10 and a second 11 current supply conductor, which are connected to respective contacts 5 of the lamp cap 4, extend through the seal 2 at the first end 3 of the outer bulb 1 to the first 8 and second 9 current lead.
  • a portion of the second current supply conductor 11 in this case is enveloped by an insulator 12 inside the outer bulb 1, which insulator is anchored in the seal 2 of the outer bulb 1.
  • the first current lead 8 is enveloped by an insulator 13, which is fastened to the discharge vessel 6, at the area where it issues from the discharge vessel 6.
  • the insulator in the Figure is a quartz glass tube which is fused to the discharge vessel.
  • the spacing between bare portions of the second current supply conductor 11 and the first current lead 8, which would be a without the measure according to the invention, is increased to b .
  • flash-over between said conductors is prevented also during lamp re-ignition in the hot state.
  • a similar wide spacing between bare portions is not possible in the geometry of the known lamp, since the insulator 12 cannot extend to beyond the bend in the second current supply conductor 11.
  • the use of a much longer insulator 12, moreover, would involve the risk of fracture thereof and complications in the manufacture of the lamp.
  • a glass with an SiO2 content of, for example, 95% by weight or more, or hard glass could be used for the insulator 13.
  • the discharge vessel 6 may have a filling of, for example, a rare earth bromide, mercury, mercury bromide and/or mercury iodide, cesium iodide and rare gas, for example, argon/krypton with a pressure of, for example, 80 mbar.
  • the lamp may have a spacing between the electrodes of, for example, more than 15 mm, for example 20 mm or more, and consume a power of a few kW, for example 4000 W.
  • the lamp In the cold state, the lamp may be capable of ignition at, for example, 2000 V, but when the pressure in the lamp is comparatively high as a result of recent extinction of the lamp, a voltage of several tens of kV, for example 65 kV, may be necessary for igniting the lamp anew.

Landscapes

  • Vessels And Coating Films For Discharge Lamps (AREA)
EP19920201518 1991-06-04 1992-05-29 High-pressure gas discharge lamp Withdrawn EP0517304A3 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
EP91201374 1991-06-04
EP91201374 1991-06-04

Publications (2)

Publication Number Publication Date
EP0517304A2 true EP0517304A2 (fr) 1992-12-09
EP0517304A3 EP0517304A3 (en) 1993-07-14

Family

ID=8207697

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19920201518 Withdrawn EP0517304A3 (en) 1991-06-04 1992-05-29 High-pressure gas discharge lamp

Country Status (2)

Country Link
EP (1) EP0517304A3 (fr)
JP (1) JPH0520256U (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2001024222A1 (fr) * 1999-09-30 2001-04-05 Patent-Treuhand-Gesellshaft für elektrische Glühlampen mbH Lampe a decharge haute pression
KR100346371B1 (ko) * 1995-10-30 2002-10-31 삼성에스디아이 주식회사 고압금속증기방전램프
WO2011048517A1 (fr) * 2009-10-19 2011-04-28 Koninklijke Philips Electronics N.V. Lampe à décharge à intensité élevée
CN102446696A (zh) * 2010-10-11 2012-05-09 通用电气公司 金属卤化物灯罩

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1860582A (zh) * 2004-03-12 2006-11-08 松下电器产业株式会社 金属蒸汽放电灯及其制造方法、以及带反射器的灯

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2145557A (en) * 1983-08-13 1985-03-27 Emi Plc Thorn Improvements in discharge lamps
DE3619068A1 (de) * 1986-06-06 1987-12-10 Patent Treuhand Ges Fuer Elektrische Gluehlampen Mbh Kompakte metallhalogenidentladungslampe
EP0381279A1 (fr) * 1989-02-01 1990-08-08 Koninklijke Philips Electronics N.V. Lampe à décharge dans le gaz à haute pression
DE4014745A1 (de) * 1990-05-08 1991-11-14 Patent Treuhand Ges Fuer Elektrische Gluehlampen Mbh Einseitig gesockelte elektrische lampe

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2145557A (en) * 1983-08-13 1985-03-27 Emi Plc Thorn Improvements in discharge lamps
DE3619068A1 (de) * 1986-06-06 1987-12-10 Patent Treuhand Ges Fuer Elektrische Gluehlampen Mbh Kompakte metallhalogenidentladungslampe
EP0381279A1 (fr) * 1989-02-01 1990-08-08 Koninklijke Philips Electronics N.V. Lampe à décharge dans le gaz à haute pression
DE4014745A1 (de) * 1990-05-08 1991-11-14 Patent Treuhand Ges Fuer Elektrische Gluehlampen Mbh Einseitig gesockelte elektrische lampe

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100346371B1 (ko) * 1995-10-30 2002-10-31 삼성에스디아이 주식회사 고압금속증기방전램프
WO2001024222A1 (fr) * 1999-09-30 2001-04-05 Patent-Treuhand-Gesellshaft für elektrische Glühlampen mbH Lampe a decharge haute pression
US6600267B1 (en) 1999-09-30 2003-07-29 Patent-Treuhand-Gesellschaft Fuer Eleltrische Gluehlampen Mbh High pressure discharge lamp having cap to prevent flashover
WO2011048517A1 (fr) * 2009-10-19 2011-04-28 Koninklijke Philips Electronics N.V. Lampe à décharge à intensité élevée
CN102446696A (zh) * 2010-10-11 2012-05-09 通用电气公司 金属卤化物灯罩
EP2439765A3 (fr) * 2010-10-11 2013-05-01 General Electric Company Lampe à décharge pouvue d'une enveloppe, ayant une résistance élevée aux courants de fuite

Also Published As

Publication number Publication date
EP0517304A3 (en) 1993-07-14
JPH0520256U (ja) 1993-03-12

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