EP0374677B1 - Verfahren zur Herstellung einer zweiseitigen Hochdruckentladungslampe - Google Patents

Verfahren zur Herstellung einer zweiseitigen Hochdruckentladungslampe Download PDF

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Publication number
EP0374677B1
EP0374677B1 EP89122831A EP89122831A EP0374677B1 EP 0374677 B1 EP0374677 B1 EP 0374677B1 EP 89122831 A EP89122831 A EP 89122831A EP 89122831 A EP89122831 A EP 89122831A EP 0374677 B1 EP0374677 B1 EP 0374677B1
Authority
EP
European Patent Office
Prior art keywords
tube
discharge vessel
operations
pinch
region
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 - Lifetime
Application number
EP89122831A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0374677A3 (de
EP0374677A2 (de
Inventor
Jürgen Dr. Heider
Dieter Lang
Richard Kotschenreuther
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 EP0374677A2 publication Critical patent/EP0374677A2/de
Publication of EP0374677A3 publication Critical patent/EP0374677A3/de
Application granted granted Critical
Publication of EP0374677B1 publication Critical patent/EP0374677B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • H01J9/24—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

Definitions

  • the invention relates to the manufacture of a lamp with the features specified in the main claim.
  • the invention relates in particular to the production of metal halide high-pressure discharge lamps with an electrical power consumption of at most 50 W, as have recently been increasingly proposed for the purpose of general lighting or for use in motor vehicle headlights.
  • Such lamps have hitherto been produced by first closing a quartz tube which is open on both sides, and then forming the olive-shaped shape at the location of the future discharge vessel by collecting the quartz glass. Then the tube end, which was initially closed, is opened again in further operations and a pump tube is attached to the center of the discharge vessel.
  • US-A-3 689 799 describes a method for introducing filling substances into compact high-pressure discharge lamps.
  • the substances are introduced into the semi-finished discharge vessel via the open tube provided for the pinch of the second electrode system.
  • this object is achieved by the sequence of work steps set out in the main claim. Further details for the production of the metal halide high-pressure discharge lamps can be found in the subclaims.
  • the tube remains clamped in the pump head during the entire pumping, filling and squeezing process. The complicated insertion and removal is no longer necessary.
  • the method of production described considerably reduces the process time. Because the pump tube is no longer present on the discharge vessel, there are also no different wall thicknesses or inhomogeneities of any other type, as a result of which the radiation emission from the lamp is very high takes place more uniformly than in the known lamps with a pump tube.
  • the lamp is therefore particularly suitable for use in optical systems, for example in motor vehicle headlights, in which extremely precise adjustment and arrangement of the light / dark boundary is important.
  • Figure 1a shows the tube 1 made of quartz glass cut to a length of about 150 mm.
  • the outside diameter of the tube is approx. 4.5 mm, the inside diameter d is approx. 2 mm.
  • both constrictions 4, 5 are simultaneously applied at a defined distance from one another by means of the shaping roll 3 (FIG. 1b).
  • a nitrogen stream N 2 with a quantity of about 10 l / h is passed through the tube 1 from one side.
  • the future discharge vessel 6 (FIG. 1c) is precisely delimited in its length of approximately 7.5 mm.
  • the constriction 4 has a smaller clear diameter than the constriction 5 arises between the two constrictions in the heated area of the future discharge vessel 6, a gas accumulation p of the nitrogen stream N 2, so that this area is somewhat inflated and assumes its olive shape with an outer diameter of approximately 5.5 mm.
  • a prefabricated electrode system (FIG. 2b) is now introduced from below through the open tube end, which consists of an electrode 8 made of tungsten, a sealing film 9 made of molybdenum and a power supply 10 made of molybdenum.
  • the electrode 8 is provided with a ball 11 at its end arranged in the discharge vessel 6.
  • the power supply line 10 is bent in a zigzag shape in the yz plane, the angle ⁇ by which the curved power supply line 10 deviates from the xz plane being less than 45 °, preferably approximately 20 ° -30 °.
  • the height h that is the amount by which the kink or reversal point 12 of the curved power supply 10 deviates from the xz plane, is greater than half the inner diameter d of the tube 1. In practice, a ratio corresponding to h ⁇ 0 , 55 d proven.
  • the sealing film 9 is aligned in the xz plane, that is to say perpendicular to the yz plane of the curved power supply 10.
  • An electrode system shaped in this way is self-supporting within the tube 1 in that the kinking or reversal points 12 of the power supply 10 are in clamping contact with the inner wall of the tube . Once adjusted to its predetermined position, the electrode system maintains it until it is finally fixed.
  • each power supply 10 For safe support of the Power supply 10 on the inner wall of tube 1, at least three kink or reversal points 12 are attached to each power supply 10.
  • a power supply 10 designed in this way centers itself on the axis of the tube 1.
  • the electrode 8 in the discharge vessel 6 is also automatically centered in the x coordinate of the sealing film 9. Any possible decentering perpendicular to the plane of the sealing film 9, that is to say in the y coordinate, for example by bending the sealing film 9, is compensated for during the squeezing process.
  • the tube 1 In the area of the sealing film 9, the tube 1 is brought to a temperature suitable for the deformation of above approximately 2200 ° C. At the same time, an argon stream Ar is passed through the preformed tube 1. After the pinch temperature is reached, the pinch jaws 13 are moved together and the first pinch 14 is produced. First the pinch is sealed, which is adjacent to the constriction 4 with the smaller diameter. The tube 1, which is squeezed on one side, is now removed from the holding device and subjected to a high-vacuum annealing at about 1200 ° C. for about 6 hours. The corresponding manufacturing stage of the lamp is shown in Figure 2c.
  • the squeeze jaws 13 are already in preparation for the execution of the second squeeze 17.
  • the discharge vessel 6 is in this by means of a rinsing-pump method Working position cleaned.
  • the discharge vessel 6 and the area of the sealing film 9 are heated to at least 400 ° C. and the heated discharge vessel 6 is then first evacuated and then flooded with argon. This rinsing-pumping process is repeated four times with the discharge vessel 6 heated. Subsequently, the filling substances (FIG.
  • the area around the sealing film 9 of the second electrode system is heated to the pinch temperature of approximately 2200 ° C. and the lamp is sealed, by squeezing the second electrode system.
  • the area of the discharge vessel 6 is cooled to 100 ° C. by means of nitrogen cooled to approximately -50 ° C. in order to prevent evaporation of the metal halide 18 and mercury 19.
  • a finished metal halide high-pressure discharge lamp 20 is shown in FIG. 4.

Landscapes

  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Vessels And Coating Films For Discharge Lamps (AREA)
  • Manufacture Of Electron Tubes, Discharge Lamp Vessels, Lead-In Wires, And The Like (AREA)
EP89122831A 1988-12-19 1989-12-11 Verfahren zur Herstellung einer zweiseitigen Hochdruckentladungslampe Expired - Lifetime EP0374677B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3842772A DE3842772A1 (de) 1988-12-19 1988-12-19 Verfahren zur herstellung einer zweiseitigen hochdruckentladungslampe
DE3842772 1988-12-19

Publications (3)

Publication Number Publication Date
EP0374677A2 EP0374677A2 (de) 1990-06-27
EP0374677A3 EP0374677A3 (de) 1991-05-08
EP0374677B1 true EP0374677B1 (de) 1995-03-29

Family

ID=6369560

Family Applications (1)

Application Number Title Priority Date Filing Date
EP89122831A Expired - Lifetime EP0374677B1 (de) 1988-12-19 1989-12-11 Verfahren zur Herstellung einer zweiseitigen Hochdruckentladungslampe

Country Status (5)

Country Link
EP (1) EP0374677B1 (ja)
JP (1) JP2831404B2 (ja)
DD (1) DD290506A5 (ja)
DE (2) DE3842772A1 (ja)
HU (1) HU202674B (ja)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8079763B2 (en) 2005-01-24 2011-12-20 University Of Bath Optical assembly of a hollow core fibre gas cell spliced to fibre ends and methods of its production

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4233469A1 (de) * 1992-10-05 1994-04-07 Patent Treuhand Ges Fuer Elektrische Gluehlampen Mbh Verfahren zur Herstellung einer einseitig gequetschten Hochdruckentladungslampe kleiner Leistung und Hochdruckentladungslampen
CN1163944C (zh) 1998-03-16 2004-08-25 松下电器产业株式会社 放电灯及其制造方法
US20010024089A1 (en) * 2000-03-23 2001-09-27 Duffy Mark E. Outer seals for shrink-sealed metal halide arc tubes
JP4703405B2 (ja) * 2006-01-12 2011-06-15 株式会社小糸製作所 放電ランプ装置用アークチューブの製造方法

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3685880A (en) * 1970-07-06 1972-08-22 Gen Electric Manufacture of lamps of the compact arc discharge type
US3689799A (en) * 1970-09-14 1972-09-05 Gen Electric Method of dosing lamps
JPS51128179A (en) * 1975-04-30 1976-11-08 Iwasaki Electric Co Ltd Discharge lamp manufacturing method
US4389201A (en) * 1979-03-12 1983-06-21 General Electric Company Method of manufacturing a lamp
SE457033B (sv) * 1985-05-23 1988-11-21 Lumalampan Ab Kompaktlysroer

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8079763B2 (en) 2005-01-24 2011-12-20 University Of Bath Optical assembly of a hollow core fibre gas cell spliced to fibre ends and methods of its production

Also Published As

Publication number Publication date
HU202674B (en) 1991-03-28
EP0374677A3 (de) 1991-05-08
DD290506A5 (de) 1991-05-29
JP2831404B2 (ja) 1998-12-02
HUT52895A (en) 1990-08-28
DE58909144D1 (de) 1995-05-04
DE3842772A1 (de) 1990-06-21
JPH02220328A (ja) 1990-09-03
HU896662D0 (en) 1990-02-28
EP0374677A2 (de) 1990-06-27

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