EP0764970B1 - Hochdruckentladungslampe - Google Patents

Hochdruckentladungslampe Download PDF

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Publication number
EP0764970B1
EP0764970B1 EP96113577A EP96113577A EP0764970B1 EP 0764970 B1 EP0764970 B1 EP 0764970B1 EP 96113577 A EP96113577 A EP 96113577A EP 96113577 A EP96113577 A EP 96113577A EP 0764970 B1 EP0764970 B1 EP 0764970B1
Authority
EP
European Patent Office
Prior art keywords
discharge lamp
pressure discharge
tube
lamp according
protuberance
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
EP96113577A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0764970A2 (de
EP0764970A3 (enrdf_load_stackoverflow
Inventor
Gottfried Eichelbrönner
Stefan Dr. Jüngst
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 EP0764970A2 publication Critical patent/EP0764970A2/de
Publication of EP0764970A3 publication Critical patent/EP0764970A3/xx
Application granted granted Critical
Publication of EP0764970B1 publication Critical patent/EP0764970B1/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
    • 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
    • H01J61/366—Seals for 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
    • H01J61/36—Seals between parts of vessels; Seals for leading-in conductors; Leading-in conductors
    • H01J61/361—Seals between parts of vessel
    • H01J61/363—End-disc seals or plug seals
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J61/00—Gas-discharge or vapour-discharge lamps
    • H01J61/82—Lamps with high-pressure unconstricted discharge having a cold pressure > 400 Torr
    • H01J61/827—Metal halide arc lamps

Definitions

  • the invention relates to a high-pressure discharge lamp according to the Preamble of claim 1.
  • Lamps are already known from EP-A 609 477 and EP-A 528 428, in which a ceramic discharge vessel using two non-conductive end plugs Cermet (composite material) is sealed.
  • the coefficient of expansion of the cermet lies between that of the ceramic discharge vessel and the implementation.
  • the implementation consists of at least one Side made of a tube made of molybdenum or another metal, the Coefficient of expansion is similar to that of molybdenum, e.g. Tungsten, Rhenium or an alloy of these metals.
  • the pipe is in the stopper sintered directly.
  • the object of the present invention is a high-pressure discharge lamp according to the preamble of claim 1 to provide a high Lifetime enables.
  • the tube has a protuberance, which is essentially extends transversely to the axis of the tube and is anchored in the end plug the formation of leaks along the interface reliably prevented.
  • the protuberance is preferably radially symmetrical and has a small thickness of at most 1 mm, preferably less than 0.5 mm.
  • the outside diameter the protuberance should preferably be at most 75% of the outside diameter of the end plug.
  • a perforated disc is advantageous used, which is attached to the tube.
  • a ring-shaped one is also suitable Base body with a radiation ring, so that the individual rays are directed radially run outside.
  • the protuberance can be a tubular collar piece for better attachment to the pipe.
  • the protuberance tapers at its outer edge, so that a particularly good anchorage in the cermet is achieved. Also be Disruptions in the cermet structure due to the smooth transition avoided.
  • the tube consists of two partial tubes is assembled, the ends of which are in the area of the end plug are connected.
  • the protuberance is attached in the area of the connection between the partial pipes.
  • the first embodiment is the protuberance between the two Pipe tubes used as a separate part.
  • the protuberance at the connection-side end of a partial pipe as integral part of the pipe section. The protuberance on connection-side end of either the discharge-side partial tube or of the partial tube facing away from the discharge.
  • connection between the two partial tubes can be different Way.
  • a first possibility is that the two partial tubes are blunt are welded together.
  • Another possibility is that a short one Piece of the partial tube on the discharge side into the partial tube facing away from the discharge is fitted.
  • the diameters of the two partial tubes are in this case different and coordinated so that the inner diameter one tube is adapted to the outer diameter of the other tube.
  • a particularly good anchoring of the protuberance in the end plug is achieved if the surface of the protuberance is uneven. Instead of being flat this can be curled like a ruff or a high surface roughness have. Other options are cross-sectional changes the disc thickness or radial circumferential kinks, grooves or furrows in the disc.
  • a metal halide lamp with an output of 150 W is shown schematically in FIG. It consists of a cylindrical outer bulb 1 made of quartz glass which defines a lamp axis and is squeezed (2) and base (3) on two sides.
  • the axially arranged discharge vessel 4 made of Al 2 O 3 ceramic is bulged in the middle 5 and has cylindrical ends 6. It is held in the outer bulb 1 by means of two current leads 7, which are connected to the base parts 3 via foils 8.
  • the power supply lines 7 are welded to bushings 9, 10 which are each fitted in a ceramic end plug 11 at the end of the discharge vessel.
  • the first implementation is a molybdenum pin 9 with a diameter of about 250 microns
  • the second implementation is a molybdenum tube 10 with a Diameter of approx. 1400 ⁇ m. Both bushings hold on the discharge side Electrodes 12, consisting of an electrode shaft 13 made of tungsten and a helix 14 pushed on at the discharge end.
  • the filling of the discharge vessel consists of an inert ignition gas, e.g. Argon, from mercury and additives to metal halides.
  • the end plugs 11 essentially also consist of Al 2 O 3 , metallic tungsten or molybdenum being contained as a further component in a proportion of 30% by weight. Further possibilities are specified in the prior art described at the beginning.
  • the molybdenum tube 10 with an outer diameter of 1.4 mm and one Wall thickness of 0.2 mm is in an end plug 11 with an outer diameter of 3.5 mm and a length of 5.0 mm sintered directly.
  • a perforated disc 15 made of molybdenum with an outer diameter of 2.4 mm is approximately centered with respect to the length of the end plug 11 on the pipe 10 appropriate.
  • the thickness of the disc is 0.5 mm, the inside diameter is that Adjusted outer diameter of the pipe.
  • the attachment of the disk 15 ′ is carried out by a collar 16 relieved, which is designed as a short piece of pipe, the inside diameter adapted to the outer diameter of the tubular bushing 10 is.
  • the collar 16 can be produced, for example, by deep-drawing the disk become.
  • Fig. 3 shows a further embodiment in which the tubular Implementation consists of two partial tubes 20, 21, both of which are the same Own diameter.
  • the disc 25 is an integral end piece (26) of the two partial tubes executed.
  • the second partial tube 27 is blunt on the underside of the Washer 25 welded on.
  • the manufacture of such a tube with integral End piece is possible, for example, by deep drawing.
  • the first partial tube has on the discharge side 30 a smaller diameter than the second partial tube 31 on the discharge-facing Page.
  • the second partial tube 31 is on the discharge side a disk 25 is formed.
  • the first partial pipe 30 is a short piece in the second partial tube 31 pushed in and in the region of the disc 25 with this welded. In this way, a particularly good fixation of the reached to each other.
  • FIG. 6a and 6b show cross-sectional profiles of panes on an enlarged scale, the surface of which is uneven. Such discs are particularly suitable for the exemplary embodiment according to FIG. 5.
  • the disk 25a has a Cross section with groove-like, circular curvature 33 and elongated tip.
  • Fig. 6b is the cross section of the disc 25b reduced in places (34), so that the adhesiveness is improved.
  • Fig. 7 shows an embodiment in which the tightness and adhesive strength through a central larger disc 35 and two additional smaller ones dimensioned washers 36, which are uniform over the length of the end plug 11 distribute, is improved.
  • FIG. 8 shows a further embodiment of a protuberance in FIG Top view, namely an annular base body 40 with a radiation ring 41. It should be noted that the outer diameter of the body a sealing effect is significantly larger than the outside diameter of the pipe ensure. The beam 41 serves for better anchoring in the end plug.
  • tubular bushing and the protuberance is used for both ends of the discharge vessel.

Landscapes

  • Vessels And Coating Films For Discharge Lamps (AREA)
EP96113577A 1995-09-22 1996-08-23 Hochdruckentladungslampe Expired - Lifetime EP0764970B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19535338 1995-09-22
DE19535338A DE19535338A1 (de) 1995-09-22 1995-09-22 Hochdruckentladungslampe

Publications (3)

Publication Number Publication Date
EP0764970A2 EP0764970A2 (de) 1997-03-26
EP0764970A3 EP0764970A3 (enrdf_load_stackoverflow) 1997-04-23
EP0764970B1 true EP0764970B1 (de) 1999-11-03

Family

ID=7772941

Family Applications (1)

Application Number Title Priority Date Filing Date
EP96113577A Expired - Lifetime EP0764970B1 (de) 1995-09-22 1996-08-23 Hochdruckentladungslampe

Country Status (3)

Country Link
EP (1) EP0764970B1 (enrdf_load_stackoverflow)
JP (1) JP3037865U (enrdf_load_stackoverflow)
DE (2) DE19535338A1 (enrdf_load_stackoverflow)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101322210B (zh) * 2005-12-09 2010-10-13 奥斯兰姆有限公司 金属卤化物灯

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2526008Y2 (ja) * 1990-03-27 1997-02-12 株式会社シマノ 伸縮式元竿構造
JP2531743Y2 (ja) * 1991-08-06 1997-04-09 株式会社シマノ 伸縮式元竿
JP2531742Y2 (ja) * 1991-08-05 1997-04-09 株式会社シマノ 伸縮式元竿
DE19815066B4 (de) 1998-04-03 2006-11-23 Bts Holding International Bv Filmabtaster mit Bildstandsfehlerkorrektur
CN1210757C (zh) * 1999-03-19 2005-07-13 皇家菲利浦电子有限公司 电灯

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5404078A (en) * 1991-08-20 1995-04-04 Patent-Treuhand-Gesellschaft Fur Elektrische Gluhlampen Mbh High-pressure discharge lamp and method of manufacture
DE9207816U1 (de) * 1992-06-10 1992-08-20 Patent-Treuhand-Gesellschaft für elektrische Glühlampen mbH, 8000 München Hochdruckentladungslampe

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101322210B (zh) * 2005-12-09 2010-10-13 奥斯兰姆有限公司 金属卤化物灯

Also Published As

Publication number Publication date
EP0764970A2 (de) 1997-03-26
JP3037865U (ja) 1997-05-27
EP0764970A3 (enrdf_load_stackoverflow) 1997-04-23
DE59603552D1 (de) 1999-12-09
DE19535338A1 (de) 1997-03-27

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