EP0086479B1 - Lampe à décharge à haute pression - Google Patents

Lampe à décharge à haute pression Download PDF

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Publication number
EP0086479B1
EP0086479B1 EP83101392A EP83101392A EP0086479B1 EP 0086479 B1 EP0086479 B1 EP 0086479B1 EP 83101392 A EP83101392 A EP 83101392A EP 83101392 A EP83101392 A EP 83101392A EP 0086479 B1 EP0086479 B1 EP 0086479B1
Authority
EP
European Patent Office
Prior art keywords
support element
lamp
discharge space
pressure discharge
length
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
EP83101392A
Other languages
German (de)
English (en)
Other versions
EP0086479A3 (en
EP0086479A2 (fr
Inventor
Walter Triebel
Heinz Bunke
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 EP0086479A2 publication Critical patent/EP0086479A2/fr
Publication of EP0086479A3 publication Critical patent/EP0086479A3/de
Application granted granted Critical
Publication of EP0086479B1 publication Critical patent/EP0086479B1/fr
Expired 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
    • H01J61/04—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

Definitions

  • the invention relates to a high-pressure discharge lamp with a lamp bulb made of quartz and enclosing the electrodes made of tungsten and a noble gas, to the rotationally symmetrical discharge space of which a cylindrical bulb shaft adjoins in the longitudinal axis on the two opposite sides and each bulb shaft at its end together with one arranged on the lamp axis Electrode rod, which is provided with the electrode projecting into the discharge space, is sealed in a gastight manner by melting, a support element surrounding the electrode rod being arranged with play within the bulb shaft and a compression spring being provided to fix the position thereof in the direction of the lamp longitudinal axis.
  • the object of the present invention is to arrange the support element in such a way and to secure it against axial displacement in such a way that neither complicated adjustment processes nor deformation work has to be carried out on the discharge vessel.
  • the compression spring is arranged non-positively between the electrode and the support element, as a result of which this rests resiliently on part of the melt with the end face facing away from the compression spring.
  • the length of the support element is preferably dimensioned such that its end face facing the discharge space essentially seals it off from the piston skirt.
  • the guiding properties of the support element within the piston skirt are also significantly improved in that the length thereof is advantageously greater or at least as large as its diameter.
  • the ratio of the length of the support element to the diameter is constant, while in the case of larger power levels the end of the support element facing the discharge space has a larger diameter - for example in the form of a stepped and rounded section - than the end facing away from the discharge space.
  • the support element consists of a material with a high melting point and a coefficient of expansion similar to that of the discharge vessel. For this, e.g. Quartz or ceramic are particularly suitable. According to the invention, a metal with a high melting point, e.g. Tungsten.
  • the design has the advantage that no heat treatments of any kind are required to deform the discharge vessel, neither in prefabrication nor in the fully assembled and melted lamp, which, because of the specific properties of the material, can only be carried out by highly qualified specialists. Since the support element rests on part of the melt, only the electrode spacing in the discharge space needs to be taken into account when mounting and melting the lamp feet into the discharge vessel. The length of the support element is selected such that almost the entire cavity in the piston skirt is not accessible for the discharge. This results in the further advantages that tilting of the support elements and thus mechanical damage to the inner surface of the piston skirt during assembly are excluded and the volume to be filled with noble gas is significantly reduced. In addition, these masses located behind the electrodes form cold spots at which vaporized tungsten from the electrodes can condense without adversely affecting the amount of light emitted.
  • the high pressure discharge lamp 1 shown in Figure 1 surrounds, with its approximately spherical excluding l i accordingen discharge space 2, the retained by means of the electrode rods 3, 4, disposed on the longitudinal lamp axis and protruding into the discharge space 2 anode 5 and cathode 6 are Starting from opposite sides of the discharge space the electrode rods 3, 4 concentrically surrounding cylindrical piston shafts 7, 8 arranged, the ends of which gas are tightly fused to the electrode rods 3, 4.
  • the gas-tight seal consists of the glazing 9 or 10, the dome 11 (only visible on the cathode side) and the ends of the piston shafts 7, 8.
  • a support element in each is surrounded on the electrode rods 3, 4 and by the piston shafts 9, 10 with play Form a capillary tube 12, 13 made of quartz, which is pressed by means of a pressure spring 14, 15 made of tungsten between the anode 5 or the cathode 6 and the capillary tube 12, 13 to the associated glazing 9, 10.
  • the capillary tubes 12 and 13 have a length L of 25 mm and 20 mm and a diameter D of approximately 7.5 mm.
  • the high-pressure discharge lamp 1 is closed by a pump tip 16 located on the bulb shaft 7.
  • the electrode rod 4 located outside of the melting point is connected via a connecting piece 17 to an external power supply 18 which is designed as a strand. Both lamp ends are provided with a base sleeve 19 or 20.
  • An ignition wire 21 is guided outside the discharge space 2 and wraps around the respective bulb shafts 7 and 8.
  • a typical high-pressure discharge lamp has a xenon filling pressure of approximately 10 bar and is operated on direct voltage with an electrical power of 500 W.
  • a lamp base (see also FIG. 2) for a high-pressure discharge lamp 1 is produced in a simple manner.
  • the electrode rod 4 made of tungsten is first provided with a glazing 10.
  • the glazing 10 has a smaller coefficient of expansion compared to the tungsten.
  • the dome 11 to be applied subsequently consists of one or more transition glasses, each with a far lower expansion coefficient.
  • the last material to be applied, like the bead 22, is quartz glass.
  • the end of the piston skirt 8 is later melted onto the bead 22.
  • the capillary tube 24 made of quartz and having a rounded shoulder 23 in the exemplary embodiment in FIG. 2 is pushed onto the electrode rod 4.
  • the capillary tube 24 here has a length L of approximately 20 mm and a largest diameter D of approximately 10 mm.
  • the ratio of the length L to the diameter D is 2.0 on the side facing the discharge space and is thus smaller than on the side facing away from the discharge space.
  • the capillary tube 24 is easily displaceable on the electrode rod 4.
  • the compression spring 15 made of tungsten is also pushed onto the electrode rod 4, likewise easily displaceable.
  • the cathode 6 is fastened to the free-standing end of the electrode rod 4, the compression spring 15 being under slight tension and the capillary tube 24 being pressed permanently against the glazing 10.
  • the foot thus finished is pushed into the cylindrical piston shaft 8 and, after appropriate positioning in the discharge space 2, is fused in a conventional manner.
  • the second lamp side is produced in a similar manner, only the distance between the electrodes 5 and 6 having to be adjusted when this lamp foot is melted into the bulb shaft 7.
  • the protruding tube piece 25 made of quartz is removed before further processing to the finished lamp.

Landscapes

  • Vessels And Coating Films For Discharge Lamps (AREA)
  • Discharge Lamp (AREA)
  • Discharge Lamps And Accessories Thereof (AREA)

Claims (5)

1. Lampe à décharge à haute pression (1), comportant une ampoule de quartz qui renferme les électrodes (5, 6) en tungstène et un gaz rare, et à la chambre de décharge (2) à symétrie de révolution de laquelle une partie longiligne cylindrique (7, 8) respective se raccorde dans l'axe longitudinal, des deux côtés opposés, chaque partie longiligne (7, 8) étant obturée à son extrémité avec étanchéité aux gaz, à l'aide d'un scellement (8, 10, 11), conjointement à une barrette (3, 4) d'électrode située dans l'axe longitudinal de la lampe et pourvue de l'électrode (5, 6) s'engageant dans la chambre de décharge (2), un élément de soutien (12, 13) entourant ladite barrette (3, 4) d'électrode étant logé avec jeu à l'intérieur de la partie longiligne (7, 8), et un ressort de pression (14, 15) étant prévu dans la direction de l'axe longitudinal de la lampe pour maintenir cet élément fermement à demeuret caractérisée par le fait que le ressort de pression (14,15) est interposé à force entre l'électrode (5, 6) et l'élément de soutien (12, 13), de sorte que ce dernier est appliqué élastiquement, par sa face frontale tournée à l'opposé du ressort de pression (14, 15), contre une partie dudit scellement (9, 10).
2. Lampe à décharge à haute pression selon la revendication 1, caractérisée par le fait que la longueur L de l'élément de soutien (12, 13) est dimensionnée de façon que sa face frontale tournée vers la chambre de décharge (2) obture sensiblement cette dernière par rapport à la partie longiligne (7, 8) de l'ampoule.
3. Lampe à décharge à haute pression selon les revendications 1 et 2, caractérisée par le fait que le rapport entre la longueur L de l'élément de soutien (12, 13) et le diamètre D est constant sur toute la longueur.
4. Lampe à décharge à haute pression selon les revendications 1 et 2, caractérisée par le fait que le rapport entre la longueur L de l'élément de soutien (12, 13) et le diamètre D est plus petit, du côté tourné vers la chambre de décharge, que du côté tourné à l'opposé de cette chambre de décharge.
5. Lampe à décharge à haute pression selon les revendications 1 à 4, caractérisée par le fait que le rapport entre la longueur L de l'élément de soutien (12, 13) et le diamètre D est égal ou supérieur à un.
EP83101392A 1982-02-16 1983-02-14 Lampe à décharge à haute pression Expired EP0086479B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3205401 1982-02-16
DE19823205401 DE3205401A1 (de) 1982-02-16 1982-02-16 Hochdruckentladungslampe

Publications (3)

Publication Number Publication Date
EP0086479A2 EP0086479A2 (fr) 1983-08-24
EP0086479A3 EP0086479A3 (en) 1983-11-30
EP0086479B1 true EP0086479B1 (fr) 1986-08-06

Family

ID=6155795

Family Applications (1)

Application Number Title Priority Date Filing Date
EP83101392A Expired EP0086479B1 (fr) 1982-02-16 1983-02-14 Lampe à décharge à haute pression

Country Status (4)

Country Link
US (1) US4559472A (fr)
EP (1) EP0086479B1 (fr)
JP (1) JPS58152369A (fr)
DE (2) DE3205401A1 (fr)

Families Citing this family (20)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR900008794B1 (ko) * 1986-06-11 1990-11-29 티 디 케이 가부시끼가이샤 방전 램프장치
GB2199693B (en) * 1986-12-02 1990-08-15 Noblelight Ltd Improvements in and relating to flash lamps
US4868458A (en) * 1988-02-18 1989-09-19 General Electric Company Xenon lamp particularly suited for automotive applications
DE3923589A1 (de) * 1989-07-17 1991-01-24 Patent Treuhand Ges Fuer Elektrische Gluehlampen Mbh Hochdruckentladungslampe
JPH0612606Y2 (ja) * 1989-12-29 1994-03-30 ミヨタ株式会社 ハロゲンランプ
JPH0531801Y2 (fr) * 1990-01-29 1993-08-16
DE4030820A1 (de) * 1990-09-28 1992-04-02 Patent Treuhand Ges Fuer Elektrische Gluehlampen Mbh Hochdruckentladungslampe
US5369329A (en) * 1992-10-09 1994-11-29 Canrad, Inc. Short arc lamp electrode rod supports
US5598063A (en) * 1992-12-16 1997-01-28 General Electric Company Means for supporting and sealing the lead structure of a lamp
US5898270A (en) * 1997-04-11 1999-04-27 Ilc Technology, Inc. Monocoque structure and large electrode beaded rob re-entrant seals for flashlamp-pumped solid-state laser flashlamps
US5859492A (en) * 1997-07-11 1999-01-12 Austad; Helge Electrode rod support for short arc lamp
JP3562271B2 (ja) * 1997-11-07 2004-09-08 ウシオ電機株式会社 ショートアークランプ
US6078132A (en) * 1998-01-21 2000-06-20 Imaging & Sensing Technology Corporation Miniature deuterium arc lamp
EP0964432B1 (fr) * 1998-05-12 2005-08-03 Ushiodenki Kabushiki Kaisha Lampe à décharge à haute pression
JP3718077B2 (ja) * 1999-03-16 2005-11-16 松下電器産業株式会社 メタルハライドランプ
WO2002003418A1 (fr) * 2000-06-30 2002-01-10 Applied Materials, Inc. Lampe amelioree pour chambre de traitement thermique rapide
JP3669292B2 (ja) * 2001-06-14 2005-07-06 ウシオ電機株式会社 ショートアーク型放電ランプ
JP4311319B2 (ja) * 2004-09-22 2009-08-12 ウシオ電機株式会社 ショートアーク型放電ランプ
DE102006026485A1 (de) * 2006-06-07 2007-12-13 Patent-Treuhand-Gesellschaft für elektrische Glühlampen mbH Sockel für eine Lampe
DE102021206702A1 (de) 2021-06-28 2022-12-29 Ushio Germany Gmbh Hochdruckentladungslampe, insbesondere natriumdampf-hochdrucklampe, mit verbesserter zündfähigkeit

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1132242B (de) * 1961-01-16 1962-06-28 Patra Patent Treuhand Elektrodeneinschmelzung fuer Hochdruckentladungslampen und Verfahren zu ihrer Herstellung
US3970883A (en) * 1975-04-07 1976-07-20 Varian Associates Arc lamp with movable electrode
NL7506655A (nl) * 1975-06-05 1976-12-07 Philips Nv Korte-boog ontladingslamp.
DE3029824A1 (de) * 1980-08-06 1982-03-11 Patent-Treuhand-Gesellschaft für elektrische Glühlampen mbH, 8000 München Hochdruckentladungslampe

Also Published As

Publication number Publication date
JPS58152369A (ja) 1983-09-09
US4559472A (en) 1985-12-17
EP0086479A3 (en) 1983-11-30
EP0086479A2 (fr) 1983-08-24
JPH0421984B2 (fr) 1992-04-14
DE3205401A1 (de) 1983-08-25
DE3365048D1 (en) 1986-09-11

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