EP0764970B1 - High pressure discharge lamp - Google Patents

High pressure discharge lamp 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
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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
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German (de)
French (fr)
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EP0764970A2 (en
EP0764970A3 (en
Inventor
Gottfried Eichelbrönner
Stefan Dr. Jüngst
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Osram GmbH
Original Assignee
Patent Treuhand Gesellschaft fuer Elektrische Gluehlampen mbH
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Publication of EP0764970A3 publication Critical patent/EP0764970A3/xx
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    • 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.

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  • Vessels And Coating Films For Discharge Lamps (AREA)

Description

Die Erfindung geht aus von einer Hochdruckentladungslampe gemäß dem Oberbegriff des Anspruchs 1.The invention relates to a high-pressure discharge lamp according to the Preamble of claim 1.

Es handelt sich dabei insbesondere um Metallhalogenidlampen, deren Farbwiedergabe dadurch verbessert wird, daß ein keramisches Entladungsgefäß benutzt wird, das eine Erhöhung der Betriebstemperatur gegenüber einem Entladungsgefäß aus Quarzglas gestattet. Im Prinzip ist eine Anwendung aber auch bei Natriumhochdrucklampen möglich.These are in particular metal halide lamps, their color rendering is improved in that a ceramic discharge vessel is used that an increase in the operating temperature compared to a Discharge vessel made of quartz glass allowed. In principle is an application but also possible with high pressure sodium lamps.

Aus EP-A 609 477 und EP-A 528 428 sind bereits Lampen bekannt, bei denen ein keramisches Entladungsgefäß mittels zweier Endstopfen aus nichtleitendem Cermet (Kompositmaterial) abgedichtet ist. Der Ausdehnungskoeffizient des Cermets liegt zwischen dem des keramischen Entladungsgefäß und dem der Durchführung. Die Durchführung besteht mindestens auf einer Seite aus einem Rohr aus Molybdän oder aus einem anderem Metall, dessen Ausdehnungskoeffizient ähnlich klein wie der des Molybdäns ist., z.B. Wolfram, Rhenium oder eine Legierung dieser Metalle. Das Rohr ist in den Stopfen direkt eingesintert.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.

Aus der EP-A 573 880 ist eine Lampe bekannt, die einen Niobstift als Durchführung verwendet. Er ist im Stopfen mittels Glaslot eingeschmolzen. Zur Verbesserung der Abdichtung wird ein überstehender Grat mit Abscherkante verwendet.From EP-A 573 880 a lamp is known which has a niobium stick as a leadthrough used. It is melted into the stopper using glass solder. For A protruding ridge with a shearing edge improves the seal used.

Bei den für derartige Lampen gewünschten hohen Lebensdauern hat sich jedoch gezeigt, daß die Lampen im Bereich der Grenzschicht zwischen Endstopfen und Durchführung schließlich aufgrund der thermischen Wechselbelastung undicht werden.With the long lifetimes desired for such lamps, however, showed that the lamps are in the area of the interface between end plugs and finally due to the thermal alternating load leak.

Es ist Aufgabe der vorliegenden Erfindung, eine Hochdruckentladungslampe gemäß dem Oberbegriff des Anspruchs 1 bereitzustellen, die eine hohe Lebensdauer ermöglicht.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.

Diese Aufgabe wird durch die kennzeichnenden Merkmale des Anspruchs 1 gelöst. Besonders vorteilhafte Ausgestaltungen finden sich in den abhängigen Ansprüchen. This object is achieved by the characterizing features of claim 1 solved. Particularly advantageous configurations can be found in the dependent ones Claims.

Dadurch, daß das Rohr eine Ausstülpung besitzt, die sich im wesentlichen quer zur Achse des Rohres erstreckt und im Endstopfen verankert ist, wird das Ausbilden von Undichtigkeiten entlang der Grenzfläche zuverlässig verhindert.In that 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.

Bevorzugt ist die Ausstülpung radialsymmetrisch und hat eine geringe Dikke von höchstens 1 mm, bevorzugt weniger als 0,5 mm. Der Außendurchmesser der Ausstülpung sollte bevorzugt höchstens 75% des Außendurchmessers des Endstopfens entsprechen. Vorteilhaft wird eine Lochscheibe verwendet, die am Rohr befestigt ist. Gut geeignet ist auch ein ringförmiger Grundkörper mit Strahlenkranz, so daß die einzelnen Strahlen radial nach außen laufen. Insbesondere kann die Ausstülpung ein rohrartiges Kragenstück zur besseren Befestigung am Rohr besitzen.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. In particular, the protuberance can be a tubular collar piece for better attachment to the pipe.

Insbesondere läuft die Ausstülpung an ihrem äußeren Rand spitz zu, so daß eine besonders gute Verankerung im Cermet erreicht wird. Außerdem werden Störungen der Cermetstruktur durch den fließenden Übergang vermieden.In particular, 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.

Gute Ergebnisse lassen sich erzielen, wenn das Rohr aus zwei Teilrohren zusammengesetzt ist, deren Enden im Bereich des Endstopfens miteinander verbunden sind. Dabei gibt es mehrere Möglichkeiten, wie die Ausstülpung im Bereich der Verbindung zwischen den Teilrohren angebracht ist. Bei einem ersten Ausführungsbeispiel ist die Ausstülpung zwischen den beiden Teilrohren als separates Teil eingesetzt. Bei einem zweiten Ausführungsbeispiel ist die Ausstülpung am verbindungsseitigen Ende eines Teilrohres als integraler Teil des Teilrohres angeformt. Dabei kann die Ausstülpung am verbindungsseitigen Ende entweder des entladungsseitigen Teilrohrs oder des entladungsabgewandten Teilrohrs angeformt sein.Good results can be achieved if the tube consists of two partial tubes is assembled, the ends of which are in the area of the end plug are connected. There are several options, such as the protuberance is attached in the area of the connection between the partial pipes. At a The first embodiment is the protuberance between the two Pipe tubes used as a separate part. In a second embodiment is 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.

Die Verbindung zwischen den beiden Teilrohren kann auf verschiedene Weise erfolgen. Eine erste Möglichkeit ist, daß die beiden Teilrohre stumpf aneinander angeschweißt sind. Eine andere Möglichkeit ist, daß ein kurzes Stück des entladungsseitigen Teilrohrs in das entladungsabgewandte Teilrohr eingepaßt ist. Die Durchmesser der beiden Teilrohre sind in diesem Fall unterschiedlich und so aufeinander abgestimmt, daß der Innendurchmesser des einen Rohres dem Außendurchmesser des anderen Rohres angepaßt ist. The 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.

Eine besonders gute Verankerung der Ausstülpung im Endstopfen wird erreicht, wenn die Oberfläche der Ausstülpung uneben ist. Statt plan zu sein, kann diese halskrausenartig gewellt sein oder auch eine hohe Oberflächenrauhigkeit besitzen. Andere Möglichkeiten sind Querschnittsveränderungen der Scheibendicke oder radial umlaufende Knicke, Rillen oder Furchen in der Scheibe.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.

Die Herstellung derartiger Lampen erfolgt, indem die Ausstülpung, die bevorzugt aus demselben Material wie das Rohr besteht, zunächst auf das Rohr aufgeschoben wird und mit diesem über den gesamten Umfang verschweißt wird. Dabei ist auf Dichtigkeit zu achten. Eine geeignete Methode ist Laser- oder Elektronenstrahlschweißen. Um die so präparierte Durchführung wird nun die Cermet-Preßform gelegt und das Cermetpulver eingefüllt. Dann wird das Cermet gepreßt, so daß ein Grünkörper entsteht, der die Durchführung bereits enthält. Die Elektrode wird bevorzugt zu diesem Zeitpunkt oder sogar noch später, nämlich erst nach dem Vorsintern, an die Durchführung angeschweißt. Ansonsten entspricht die Herstellung dem eingangs zitierten Stand der Technik.The manufacture of such lamps is done by the protuberance, which is preferred made of the same material as the pipe, first onto the pipe is pushed on and welded to it over the entire circumference becomes. Attention must be paid to tightness. A suitable method is laser or electron beam welding. To carry out the preparation so prepared now put the cermet mold and poured the cermet powder. Then the cermet is pressed so that a green body is formed, which is the implementation already contains. The electrode is preferred at this time or even later, namely only after the pre-sintering, to the implementation welded on. Otherwise, the production corresponds to that cited at the beginning State of the art.

Im folgenden soll die Erfindung anhand mehrerer Ausführungsbeispiele näher erläutert werden. Es zeigen:

Figur 1
eine Metallhalogenidlampe, im Schnitt
Figur 2
ein weiteres Ausführungsbeispiel für den Bereich der rohrartigen Durchführung im Schnitt
Figur 3 bis 7
weitere Ausführungsbeispiele des Bereichs der rohrartigen Durchführung im Schnitt
Figur 8
ein weiteres Ausführungsbeispiel einer Ausstülpung in Draufsicht.
The invention will be explained in more detail below with the aid of several exemplary embodiments. Show it:
Figure 1
a metal halide lamp, in section
Figure 2
a further embodiment for the area of the tubular implementation in section
Figure 3 to 7
further exemplary embodiments of the area of the tubular bushing on average
Figure 8
a further embodiment of a protuberance in plan view.

In Figur 1 ist schematisch eine Metallhalogenidlampe mit einer Leistung von 150 W dargestellt. Sie besteht aus einem eine Lampenachse definierenden zylindrischen Außenkolben 1 aus Quarzglas, der zweiseitig gequetscht (2) und gesockelt (3) ist. Das axial angeordnete Entladungsgefäß 4 aus Al2O3-Keramik ist in der Mitte 5 ausgebaucht und besitzt zylindrische Enden 6. Es ist mittels zweier Stromzuführungen 7, die mit den Sockelteilen 3 über Folien 8 verbunden sind, im Außenkolben 1 gehaltert. die Stromzuführungen 7 sind mit Durchführungen 9, 10 verschweißt, die jeweils in einem keramischen Endstopfen 11 am Ende des Entladungsgefäßes eingepaßt sind.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.

Die erste Durchführung ist ein Molybdänstift 9 mit einem Durchmesser von ca. 250 µm, die zweite Durchführung ist ein Molybdänrohr 10 mit einem Durchmesser von ca. 1400 µm. Beide Durchführungen haltern entladungsseitig Elektroden 12, bestehend aus einem Elektrodenschaft 13 aus Wolfram und eine am entladungsseitigen Ende aufgeschobenen Wendel 14. Die Füllung des Entladungsgefäßes besteht aus neben einem inerten Zündgas, z.B. Argon, aus Quecksilber und Zusätzen an Metallhalogeniden.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 µm. 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.

Die Endstopfen 11 bestehen im wesentlichen ebenfalls aus Al2O3, wobei als weitere Komponente metallisches Wolfram oder auch Molybdän mit einem Anteil von 30 Gew.-% enthalten ist. Weitere Möglichkeiten sind im eingangs beschriebenen Stand der Technik angegeben.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.

Das Molybdänrohr 10 mit einem Außendurchmesser von 1,4 mm und einer Wandstärke von 0,2 mm ist in einem Endstopfen 11 mit einem Außendurchmesser von 3,5 mm und einer Länge von 5,0 mm direkt eingesintert. Eine Lochscheibe 15 aus Molybdän mit einem Außendurchmesser von 2,4 mm ist in etwa mittig in bezug auf die Länge des Endstopfens 11 am Rohr 10 angebracht. Die Dicke der Scheibe ist 0,5 mm, der Innendurchmesser ist dem Außendurchmesser des Rohrs angepaßt.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.

Gemäß Figur 2 wird das Anbringen der Scheibe 15' durch einen Kragen 16 erleichtert, der als kurzes Rohrstück ausgeführt ist, dessen Innendurchmesser dem Außendurchmesser der rohrförmigen Durchführung 10 angepaßt ist. Der Kragen 16 kann beispielsweise durch Tiefziehen der Scheibe hergestellt werden. Der Außenrand der Scheibe 15' läuft in einer Spitze 17 aus.According to FIG. 2, 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. The outer edge of the disc 15 'ends in a tip 17.

Fig. 3 zeigt ein weiteres Ausführungsbeispiel, bei dem die rohrförmige Durchführung aus zwei Teilrohren 20, 21 besteht, die beide den gleichen Durchmesser besitzen. Die Lochscheibe 22 mit langgezogener Spitze 17' sitzt als separates Teil zwischen den beiden Teilrohren 20, 21 und ist mit beiden verschweißt. 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 perforated disc 22 with elongated tip 17 'sits as a separate part between the two partial tubes 20, 21 and is with both welded.

In Fig. 4 ist die Scheibe 25 als integrales Endstück eines (26) der beiden Teilrohre ausgeführt. Das zweite Teilrohr 27 ist stumpf an die Unterseite der Scheibe 25 angeschweißt. Die Herstellung eines derartigen Rohres mit integralem Endstück ist beispielsweise mittels Tiefziehen möglich.In Fig. 4, 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.

Bei einer modifizierten Form (Fig. 5) besitzt das entladungsseitige erste Teilrohr 30 einen kleineren Durchmesser als das zweite Teilrohr 31 auf der entladungsabgewandten Seite. Dem zweiten Teilrohr 31 ist entladungsseitig eine Scheibe 25 angeformt. Das erste Teilrohr 30 ist ein kurzes Stück in das zweite Teilrohr 31 hineingeschoben und im Bereich der Scheibe 25 mit diesem verschweißt. Auf diese Weise wird eine besonders gute Fixierung der beiden Teilrohre zueinander erreicht.In the case of a modified form (FIG. 5), 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 und 6b zeigen in Vergrößerung Querschnittsprofile von Scheiben, deren Oberfläche uneben ist. Derartige Scheiben eignen sich insbesondere für das Ausführungsbeispiel gemäß Fig. 5. Die Scheibe 25a besitzt einen Querschnitt mit rillenartiger, kreisförmig umlaufender Wölbung 33 und langgezogener Spitze. Im Beispiel der Fig. 6b ist der Querschnitt der Scheibe 25b stellenweise vermindert (34), so daß die Haftfähigkeit verbessert wird.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. In the example of Fig. 6b is the cross section of the disc 25b reduced in places (34), so that the adhesiveness is improved.

Fig. 7 zeigt ein Ausführungsbeispiel, bei dem die Dichtigkeit und Haftfestigkeit durch eine zentrale größere Scheibe 35 und zwei zusätzliche kleiner dimensionierte Scheiben 36, die sich gleichmäßig über die Länge des Endstopfens 11 verteilen, verbessert wird.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.

Schließlich zeigt Fig. 8 eine weitere Ausführungsform einer Ausstülpung in Draufsicht, nämlich einen ringförmigen Grundkörper 40 mit Strahlenkranz 41. Dabei ist zu beachten, daß der Außendurchmesser des Grundkörpers deutlich größer als der Außendurchmesser des Rohres ist um eine Dichtungswirkung sicherzustellen. Der Strahlenkranz 41 dient zur besseren Verankerung im Endstopfen.Finally, 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.

In einem weiteren Ausführungsbeispiel wird die rohrförmige Durchführung und die Ausstülpung für beide Enden des Entladungsgefäßes verwendet.In a further embodiment, the tubular bushing and the protuberance is used for both ends of the discharge vessel.

Claims (14)

  1. High-pressure discharge lamp with a ceramic discharge vessel (4) which has two ends (6) which are sealed by means of two end stoppers (11) made from nonconducting Cermet (composite material) and metallic lead-throughs (9, 10) contained therein, the coefficient of expansion of the Cermet being between that of the ceramic discharge vessel and that of the lead-through and, at least at one end, the lead-through (10) comprising a tube made from molybdenum or from another metal whose coefficient of expansion is as low as that of the molybdenum, for example tungsten, rhenium or an alloy of said metals, and the tube (10) being directly sintered into the stopper (11), and the tube having a protuberance, characterized in that the pretuberance (15; 22; 25; 35; 40) has a main body which is in the shape of an annular disc, has a thickness of at most 1 mm, extends essentially transverse to the axis of the tube and is anchored in the end stopper (11).
  2. High-pressure discharge lamp according to Claim 1, characterized in that the protuberance (15; 22; 25; 35; 40) has a thickness of at most 0.5 mm.
  3. High-pressure discharge lamp according to Claim 1, characterized in that the protuberance is a perforated disc (15; 22; 25; 35) which is fastened on the tube.
  4. High-pressure discharge lamp according to Claim 3, characterized in that the disc rim comes to a point (17).
  5. High-pressure discharge lamp according to Claim 3, characterized in that the outside diameter of the disc corresponds at most to 75% of the outside diameter of the end stopper.
  6. High-pressure discharge lamp according to Claim 1, characterized in that the main body (40), which is in the shape of an annular disc, is provided with a halo (41).
  7. High-pressure discharge lamp according to Claim 1, characterized in that the tube is assembled from two component tubes (20, 21; 26, 27; 30, 31) which are interconnected in the region of the end stopper (11).
  8. High-pressure discharge lamp according to Claim 7, characterized in that the protuberance (22) is fitted between the two component tubes (20, 21).
  9. High-pressure discharge lamp according to Claim 7, characterized in that the protuberance (25) is integrally formed on the end of one component tube (26).
  10. High-pressure discharge lamp according to Claim 9, characterized in that the two component tubes (20, 21) are butt-welded to one another.
  11. High-pressure discharge lamp according to Claim 9, characterized in that a short piece of one component tube (26) is fitted into the second component tube (27).
  12. High-pressure discharge lamp according to Claim 1, characterized in that the surface of the protuberance is uneven (33; 34).
  13. High-pressure discharge lamp according to Claim 1, characterized in that the protuberance has a tubular collar piece (16) whose diameter is matched to the outside diameter of the tube.
  14. High-pressure discharge lamp according to Claim 1, characterized in that at least one further protuberance (36) is fitted on the tube in the region of the end stopper, specifically at a spacing from the first pretuberance (35).
EP96113577A 1995-09-22 1996-08-23 High pressure discharge lamp Expired - Lifetime EP0764970B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19535338 1995-09-22
DE19535338A DE19535338A1 (en) 1995-09-22 1995-09-22 High pressure discharge lamp

Publications (3)

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EP0764970A2 EP0764970A2 (en) 1997-03-26
EP0764970A3 EP0764970A3 (en) 1997-04-23
EP0764970B1 true EP0764970B1 (en) 1999-11-03

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ID=7772941

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Application Number Title Priority Date Filing Date
EP96113577A Expired - Lifetime EP0764970B1 (en) 1995-09-22 1996-08-23 High pressure discharge lamp

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EP (1) EP0764970B1 (en)
JP (1) JP3037865U (en)
DE (2) DE19535338A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101322210B (en) * 2005-12-09 2010-10-13 奥斯兰姆有限公司 Metal halide lamp

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2526008Y2 (en) * 1990-03-27 1997-02-12 株式会社シマノ Telescopic former pole structure
JP2531742Y2 (en) * 1991-08-05 1997-04-09 株式会社シマノ Telescopic former pole
JP2531743Y2 (en) * 1991-08-06 1997-04-09 株式会社シマノ Telescopic former pole
DE19815066B4 (en) 1998-04-03 2006-11-23 Bts Holding International Bv Film scanner with Bildstandsfehlerkorrektur
WO2000057453A1 (en) * 1999-03-19 2000-09-28 Koninklijke Philips Electronics N.V. Electric lamp

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* 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 (en) * 1992-06-10 1992-08-20 Patent-Treuhand-Gesellschaft für elektrische Glühlampen mbH, 8000 München High pressure discharge lamp

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101322210B (en) * 2005-12-09 2010-10-13 奥斯兰姆有限公司 Metal halide lamp

Also Published As

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

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