EP0764970A2 - High pressure discharge lamp - Google Patents

High pressure discharge lamp Download PDF

Info

Publication number
EP0764970A2
EP0764970A2 EP96113577A EP96113577A EP0764970A2 EP 0764970 A2 EP0764970 A2 EP 0764970A2 EP 96113577 A EP96113577 A EP 96113577A EP 96113577 A EP96113577 A EP 96113577A EP 0764970 A2 EP0764970 A2 EP 0764970A2
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.)
Granted
Application number
EP96113577A
Other languages
German (de)
French (fr)
Other versions
EP0764970A3 (en
EP0764970B1 (en
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/en
Publication of EP0764970A3 publication Critical patent/EP0764970A3/xx
Application granted granted Critical
Publication of EP0764970B1 publication Critical patent/EP0764970B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

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 is based on a high-pressure discharge lamp according to the preamble of claim 1.
  • metal halide lamps the color rendering of which is improved by the fact that a ceramic discharge vessel is used which permits an increase in the operating temperature compared to a discharge vessel made of quartz glass.
  • a ceramic discharge vessel is used which permits an increase in the operating temperature compared to a discharge vessel made of quartz glass.
  • an application is also possible with high pressure sodium lamps.
  • EP-A 609 477 and EP-A 528 428 lamps are already known in which a ceramic discharge vessel is sealed by means of two end plugs made of non-conductive cermet (composite material).
  • the coefficient of expansion of the cermet lies between that of the ceramic discharge vessel and that of the feedthrough.
  • the bushing consists at least on one side of a tube made of molybdenum or another metal, the coefficient of expansion of which is similarly small to that of molybdenum, e.g. Tungsten, rhenium or an alloy of these metals.
  • the pipe is sintered directly into the stopper.
  • the tube has a protuberance that extends substantially transversely to the axis of the tube and is anchored in the end plug prevents the formation of leaks along the interface.
  • 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 of the protuberance should preferably correspond to at most 75% of the outside diameter of the end plug.
  • a perforated disc which is attached to the tube is advantageously used.
  • An annular base body with a radiation ring is also very suitable, so that the individual beams run radially outwards.
  • the protuberance can have a tubular collar piece for better attachment to the tube.
  • the protuberance tapers at its outer edge, so that particularly good anchoring in the cermet is achieved.
  • disturbances in the cermet structure due to the smooth transition are avoided.
  • the pipe is composed of two partial pipes, the ends of which are connected to one another in the region of the end plug.
  • the protuberance is attached in the area of the connection between the partial pipes.
  • the protuberance between the two partial tubes is used as a separate part.
  • the protuberance is formed on the connection-side end of a partial tube as an integral part of the partial tube.
  • the protuberance can be integrally formed on either the connection-side end of the partial tube on the discharge side or the partial tube facing away from the discharge.
  • connection between the two partial pipes can be made in different ways.
  • a first possibility is that the two partial tubes are butt welded together.
  • Another possibility is that a short piece of the partial tube on the discharge side is fitted into the partial tube remote from the discharge.
  • the diameters of the two partial tubes are different and matched to one another in such a way that the inside diameter of one tube is matched to the outside diameter of the other tube.
  • a particularly good anchoring of the protuberance in the end plug is achieved when the surface of the protuberance is uneven. Instead of being flat, it can be waved like a ruff or have a high surface roughness. Other options are changes in the cross-section of the pane thickness or radially circumferential kinks, grooves or furrows in the pane.
  • Such lamps are produced by first pushing the protuberance, which preferably consists of the same material as the tube, onto the tube and welding it over the entire circumference. Attention must be paid to tightness.
  • a suitable method is laser or electron beam welding.
  • the cermet mold is then placed around the bushing thus prepared and the cermet powder is poured in. Then the cermet is pressed so that a green body is formed which already contains the leadthrough.
  • the electrode is preferably welded to the bushing at this point in time or even later, namely only after the pre-sintering. Otherwise, the production corresponds to the prior art cited at the beginning.
  • 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 power supply lines 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 bushing is a molybdenum pin 9 with a diameter of approximately 250 ⁇ m
  • the second bushing is a molybdenum tube 10 with a diameter of approximately 1400 ⁇ m.
  • Both bushings hold electrodes 12 on the discharge side, consisting of an electrode shaft 13 made of tungsten and a helix 14 pushed on at the discharge side 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 also 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 a wall thickness of 0.2 mm is sintered directly into an end plug 11 with an outer diameter of 3.5 mm and a length of 5.0 mm.
  • a perforated disk 15 made of molybdenum with an outer diameter of 2.4 mm is attached to the tube 10 approximately centrally with respect to the length of the end plug 11.
  • the thickness of the disc is 0.5 mm, the inner diameter is adapted to the outer diameter of the tube.
  • the attachment of the disc 15 ' is facilitated by a collar 16 which is designed as a short piece of pipe, the inside diameter of which is adapted to the outside diameter of the tubular bushing 10.
  • the collar 16 can be produced, for example, by deep-drawing the disk.
  • the outer edge of the disc 15 ' ends in a tip 17.
  • Fig. 3 shows a further embodiment in which the tubular bushing consists of two partial tubes 20, 21, both of which have the same diameter.
  • the disc 25 is designed as an integral end piece of one (26) of the two partial tubes.
  • the second partial tube 27 is butt welded to the underside of the disk 25. The manufacture of such a tube with an integral end piece is possible, for example, by deep drawing.
  • the first partial tube 30 on the discharge side has a smaller diameter than the second partial tube 31 on the side remote from the discharge.
  • a disc 25 is formed on the discharge side of the second partial tube 31.
  • the first partial tube 30 is pushed a short distance into the second partial tube 31 and welded to it in the area of the disk 25. In this way, a particularly good fixation of the two partial pipes to one another is achieved.
  • FIG. 6a and 6b show, on an enlarged scale, cross-sectional profiles of panes whose surface is uneven. Such disks are particularly suitable for the exemplary embodiment according to FIG. 5.
  • the disk 25a has a cross section with a groove-like, circular curvature 33 and an elongated tip.
  • the cross section of the disk 25b is reduced in places (34), so that the adhesiveness is improved.
  • Fig. 7 shows an embodiment in which the tightness and adhesive strength is improved by a central larger disc 35 and two additional smaller-sized discs 36, which are distributed evenly over the length of the end plug 11.
  • FIG. 8 shows a further embodiment of a protuberance in plan view, namely an annular base body 40 with a radiation ring 41. It should be noted that the outside diameter of the base body is significantly larger than the outside diameter of the tube in order to ensure a sealing effect.
  • the beam 41 serves for better anchoring in the end plug.
  • tubular bushing and the protuberance are used for both ends of the discharge vessel.

Abstract

A high pressure metal halogen discharge lamp has a ceramic discharge chamber (4) whose ends (6) enclose the tubular conduits (9,10) of molybdenum or similar metal sealed by the insulating ceramic plugs (11) which are sintered in position and have closely matched expansion characteristics to the chamber (4) and conduits (9,10). The effectiveness of the sealing plug (11) is subject to thermal change however and the effects of such changes are minimised by attaching one or more discs (15) to the conduits (9,10). The patent illustrates several possible designs of disc which are located at right angles to the conduit axes.

Description

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

Es handelt sich dabei insbesondere um Metallhalogenidlampen, deren Farbwidergabe 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, the color rendering of which is improved by the fact that a ceramic discharge vessel is used which permits an increase in the operating temperature compared to a discharge vessel made of quartz glass. In principle, an application is 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.From EP-A 609 477 and EP-A 528 428 lamps are already known in which a ceramic discharge vessel is sealed by means of two end plugs made of non-conductive cermet (composite material). The coefficient of expansion of the cermet lies between that of the ceramic discharge vessel and that of the feedthrough. The bushing consists at least on one side of a tube made of molybdenum or another metal, the coefficient of expansion of which is similarly small to that of molybdenum, e.g. Tungsten, rhenium or an alloy of these metals. The pipe is sintered directly into the stopper.

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, it has been shown that the lamps eventually leak in the area of the boundary layer between the end plug and the bushing due to the thermal alternating load.

Es ist Aufgabe der vorliegenden Erfindung, eine Hochdruckentladungslampe gemäß dem Oberbegriff des Anspruchs 1 bereitzustellen, die eine hohe Lebensdauer ermöglicht.It is an object of the present invention to provide a high-pressure discharge lamp according to the preamble of claim 1, which enables a long service life.

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. Particularly advantageous configurations can be found in the dependent 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.The fact that the tube has a protuberance that extends substantially transversely to the axis of the tube and is anchored in the end plug prevents the formation of leaks along the interface.

Bevorzugt ist die Ausstülpung radialsymmetrisch und hat eine geringe Dicke 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 of the protuberance should preferably correspond to at most 75% of the outside diameter of the end plug. A perforated disc which is attached to the tube is advantageously used. An annular base body with a radiation ring is also very suitable, so that the individual beams run radially outwards. In particular, the protuberance can have a tubular collar piece for better attachment to the tube.

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 particularly good anchoring in the cermet is achieved. In addition, disturbances in the cermet structure due to the smooth transition are 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 pipe is composed of two partial pipes, the ends of which are connected to one another in the region of the end plug. There are several options for how the protuberance is attached in the area of the connection between the partial pipes. In a first embodiment, the protuberance between the two partial tubes is used as a separate part. In a second exemplary embodiment, the protuberance is formed on the connection-side end of a partial tube as an integral part of the partial tube. In this case, the protuberance can be integrally formed on either the connection-side end of the partial tube on the discharge side or 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 pipes can be made in different ways. A first possibility is that the two partial tubes are butt welded together. Another possibility is that a short piece of the partial tube on the discharge side is fitted into the partial tube remote from the discharge. In this case, the diameters of the two partial tubes are different and matched to one another in such a way that the inside diameter of one tube is matched to the outside 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 when the surface of the protuberance is uneven. Instead of being flat, it can be waved like a ruff or have a high surface roughness. Other options are changes in the cross-section of the pane thickness or radially circumferential kinks, grooves or furrows in the pane.

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.Such lamps are produced by first pushing the protuberance, which preferably consists of the same material as the tube, onto the tube and welding it over the entire circumference. Attention must be paid to tightness. A suitable method is laser or electron beam welding. The cermet mold is then placed around the bushing thus prepared and the cermet powder is poured in. Then the cermet is pressed so that a green body is formed which already contains the leadthrough. The electrode is preferably welded to the bushing at this point in time or even later, namely only after the pre-sintering. Otherwise, the production corresponds to the prior art cited at the beginning.

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 power supply lines 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 bushing is a molybdenum pin 9 with a diameter of approximately 250 μm, the second bushing is a molybdenum tube 10 with a diameter of approximately 1400 μm. Both bushings hold electrodes 12 on the discharge side, consisting of an electrode shaft 13 made of tungsten and a helix 14 pushed on at the discharge side 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 also 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 a wall thickness of 0.2 mm is sintered directly into an end plug 11 with an outer diameter of 3.5 mm and a length of 5.0 mm. A perforated disk 15 made of molybdenum with an outer diameter of 2.4 mm is attached to the tube 10 approximately centrally with respect to the length of the end plug 11. The thickness of the disc is 0.5 mm, the inner diameter is adapted to the outer diameter of the tube.

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 Figure 2, the attachment of the disc 15 'is facilitated by a collar 16 which is designed as a short piece of pipe, the inside diameter of which is adapted to the outside diameter of the tubular bushing 10. The collar 16 can be produced, for example, by deep-drawing the disk. 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 bushing consists of two partial tubes 20, 21, both of which have the same diameter. The perforated disc 22 with the elongated tip 17 'sits as a separate part between the two partial tubes 20, 21 and is welded to both.

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 designed as an integral end piece of one (26) of the two partial tubes. The second partial tube 27 is butt welded to the underside of the disk 25. The manufacture of such a tube with an 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 a modified form (FIG. 5), the first partial tube 30 on the discharge side has a smaller diameter than the second partial tube 31 on the side remote from the discharge. A disc 25 is formed on the discharge side of the second partial tube 31. The first partial tube 30 is pushed a short distance into the second partial tube 31 and welded to it in the area of the disk 25. In this way, a particularly good fixation of the two partial pipes to one another is achieved.

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, on an enlarged scale, cross-sectional profiles of panes whose surface is uneven. Such disks are particularly suitable for the exemplary embodiment according to FIG. 5. The disk 25a has a cross section with a groove-like, circular curvature 33 and an elongated tip. In the example of FIG. 6b, the cross section of the disk 25b is 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 is improved by a central larger disc 35 and two additional smaller-sized discs 36, which are distributed evenly over the length of the end plug 11.

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 plan view, namely an annular base body 40 with a radiation ring 41. It should be noted that the outside diameter of the base body is significantly larger than the outside diameter of the tube in order to ensure a sealing effect. 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 exemplary embodiment, the tubular bushing and the protuberance are used for both ends of the discharge vessel.

Claims (14)

Hochdruckentladungslampe mit einem keramischen Entladungsgefäß (4) , das zwei Enden (6) besitzt, die mittels zweier Endstopfen (11) aus nichtleitendem Cermet (Kompositmaterial) und darin enthaltenen metallischen Durchführungen (9,10) abgedichtet sind, wobei der Ausdehnungskoeffizient des Cermets zwischen dem des keramischen Entladungsgefäßes und dem der Durchführung liegt und wobei mindestens an einem Ende die Durchführung (10) 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, besteht, und wobei das Rohr (10) in den Stopfen (11) direkt eingesintert ist, dadurch gekennzeichnet, daß das Rohr (10) eine Ausstülpung (15; 22; 25; 35; 40) besitzt, die sich im wesentlichen quer zur Achse des Rohres erstreckt und im Endstopfen (11) verankert ist.High-pressure discharge lamp with a ceramic discharge vessel (4), which has two ends (6), which are sealed by means of two end plugs (11) made of non-conductive cermet (composite material) and metal bushings (9, 10) contained therein, the expansion coefficient of the cermet being between the of the ceramic discharge vessel and that of the feedthrough and wherein at least at one end the feedthrough (10) is made of a tube made of molybdenum or of another metal, the coefficient of expansion of which is similarly small to that of the molybdenum Tungsten, rhenium or an alloy of these metals, and wherein the tube (10) is sintered directly into the stopper (11), characterized in that the tube (10) has a protuberance (15; 22; 25; 35; 40) has, which extends substantially transversely to the axis of the tube and is anchored in the end plug (11). Hochdruckentladungslampe nach Anspruch 1, dadurch gekennzeichnet, daß die Ausstülpung (15; 22; 25; 35; 40) eine Dicke von höchstens 1 mm besitzt.High-pressure discharge lamp according to Claim 1, characterized in that the protuberance (15; 22; 25; 35; 40) has a thickness of at most 1 mm. Hochdruckentladungslampe nach Anspruch 1, dadurch gekennzeichnet, daß die Ausstülpung eine Lochscheibe (15; 22; 25; 35) ist, die am Rohr befestigt ist.High-pressure discharge lamp according to Claim 1, characterized in that the protuberance is a perforated disc (15; 22; 25; 35) which is attached to the tube. Hochdruckentladungslampe nach Anspruch 2, dadurch gekennzeichnet, daß der Scheibenrand spitz (17) ausläuft.High-pressure discharge lamp according to Claim 2, characterized in that the edge of the pane tapers out (17). Hochdruckentladungslampe nach Anspruch 2, dadurch gekennzeichnet, daß der Außendurchmesser der Scheibe höchstens 75% des Außendurchmessers des Endstopfens entspricht.High-pressure discharge lamp according to claim 2, characterized in that the outer diameter of the disc corresponds to at most 75% of the outer diameter of the end plug. Hochdruckentladungslampe nach Anspruch 1, dadurch gekennzeichnet, daß die Ausstülpung ein ringförmiger Grundkörper (40) mit Strahlenkranz (41) ist.High-pressure discharge lamp according to Claim 1, characterized in that the protuberance is an annular base body (40) with a radiation ring (41). Hochdruckentladungslampe nach Anspruch 1, dadurch gekennzeichnet, daß das Rohr aus zwei Teilrohren (20, 21; 26, 27; 30, 31) zusammengesetzt ist, die im Bereich des Endstopfens (11) miteinander verbunden sind.High-pressure discharge lamp according to Claim 1, characterized in that the tube is composed of two partial tubes (20, 21; 26, 27; 30, 31) which are connected to one another in the region of the end plug (11). Hochdruckentladungslampe nach Anspruch 7, dadurch gekennzeichnet, daß die Ausstülpung (22) zwischen den beiden Teilrohren (20, 21) angebracht ist.High-pressure discharge lamp according to Claim 7, characterized in that the protuberance (22) is fitted between the two partial tubes (20, 21). Hochdruckentladungslampe nach Anspruch 7, dadurch gekennzeichnet, daß die Ausstülpung (25) am Ende eines Teilrohres (26) angeformt ist.High-pressure discharge lamp according to Claim 7, characterized in that the protuberance (25) is molded onto the end of a partial tube (26). Hochdruckentladungslampe nach Anspruch 9, dadurch gekennzeichnet, daß die beiden Teilrohre (20, 21) stumpf aneinander angeschweißt sind.High-pressure discharge lamp according to Claim 9, characterized in that the two partial tubes (20, 21) are butt welded to one another. Hochdruckentladungslampe nach Anspruch 9, dadurch gekennzeichnet, daß ein kurzes Stück des einen Teilrohrs (26) in das zweite Teilrohr (27) eingepaßt ist.High-pressure discharge lamp according to Claim 9, characterized in that a short piece of the one partial tube (26) is fitted into the second partial tube (27). Hochdruckentladungslampe nach Anspruch 1, dadurch gekennzeichnet, daß die Oberfläche der Ausstülpung uneben (33; 34) ist.High-pressure discharge lamp according to Claim 1, characterized in that the surface of the protuberance is uneven (33; 34). Hochdruckentladungslampe nach Anspruch 1, dadurch gekennzeichnet, daß die Ausstülpung ein rohrartiges Kragenstück (16) besitzt, dessen Durchmesser dem Außendurchmesser des Rohrs angepaßt ist.High-pressure discharge lamp according to Claim 1, characterized in that the protuberance has a tubular collar piece (16), the diameter of which is adapted to the outside diameter of the tube. Hochdruckentladungslampe nach Anspruch 1, dadurch gekennzeichnet, daß mindestens eine weitere Ausstülpung (36) am Rohr im Bereich des Endstopfens, und zwar beabstandet von der ersten Ausstülpung (35), angebracht ist.High-pressure discharge lamp according to Claim 1, characterized in that at least one further protuberance (36) is attached to the tube in the region of the end plug, at a distance from the first protuberance (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)

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

Family

ID=7772941

Family Applications (1)

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

Country Status (3)

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

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2000057453A1 (en) * 1999-03-19 2000-09-28 Koninklijke Philips Electronics N.V. Electric lamp
US7099055B1 (en) 1998-04-03 2006-08-29 Thomson Licensing Film scanner with film weaver correction facility
WO2007065827A1 (en) * 2005-12-09 2007-06-14 Osram Gesellschaft mit beschränkter Haftung Metal halide lamp

Families Citing this family (3)

* 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
JP2531743Y2 (en) * 1991-08-06 1997-04-09 株式会社シマノ Telescopic former pole
JP2531742Y2 (en) * 1991-08-05 1997-04-09 株式会社シマノ Telescopic former pole

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0528428A1 (en) * 1991-08-20 1993-02-24 Patent-Treuhand-Gesellschaft für elektrische Glühlampen mbH High-pressure discharge lamp and method of manufacture
EP0573880A1 (en) * 1992-06-10 1993-12-15 Patent-Treuhand-Gesellschaft für elektrische Glühlampen mbH High pressure discharge lamp

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0528428A1 (en) * 1991-08-20 1993-02-24 Patent-Treuhand-Gesellschaft für elektrische Glühlampen mbH High-pressure discharge lamp and method of manufacture
EP0573880A1 (en) * 1992-06-10 1993-12-15 Patent-Treuhand-Gesellschaft für elektrische Glühlampen mbH High pressure discharge lamp

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7099055B1 (en) 1998-04-03 2006-08-29 Thomson Licensing Film scanner with film weaver correction facility
WO2000057453A1 (en) * 1999-03-19 2000-09-28 Koninklijke Philips Electronics N.V. Electric lamp
WO2007065827A1 (en) * 2005-12-09 2007-06-14 Osram Gesellschaft mit beschränkter Haftung Metal halide lamp
US7719192B2 (en) 2005-12-09 2010-05-18 Osram Gesellschaft Mit Beschraenkter Haftung Metal halide lamp with intermetal interface gradient

Also Published As

Publication number Publication date
DE19535338A1 (en) 1997-03-27
EP0764970A3 (en) 1997-04-23
JP3037865U (en) 1997-05-27
DE59603552D1 (en) 1999-12-09
EP0764970B1 (en) 1999-11-03

Similar Documents

Publication Publication Date Title
EP0602530B1 (en) Method for producing a vacuum-tight seal for a ceramic discharge vessel and discharge lamp
EP0479087B1 (en) High pressure discharge lamp
EP0536609A1 (en) High pressure discharge lamp
EP0887840B1 (en) Metal halide lamp with ceramic discharge vessel
EP0570772A1 (en) High pressure discharge lamp
EP0528427A1 (en) High pressure discharge lamp
EP0602529B1 (en) High-pressure discharge lamp having a ceramic discharge vessel
DE2641880C2 (en)
EP0451647A2 (en) High-pressure discharge lamp and method for its manufacture
EP0573880B1 (en) High pressure discharge lamp
EP0479089B1 (en) High pressure discharge lamp and method for producing the same
EP0764970B1 (en) High pressure discharge lamp
DE3429105A1 (en) METAL STEAM DISCHARGE LAMP
EP0639853A1 (en) High-pressure discharge lamp with ceramic discharge vessel
EP1351278B1 (en) Metal halide lamp with ceramic discharge vessel
EP1372184A2 (en) Electrode system for a metal halide lamp and lamp provided with such a system
DE3305468C2 (en)
EP1911065B1 (en) Outer bulb electric lamp
WO2005029529A2 (en) Double-sided sealed electric lamp and method for production thereof
DD142770A5 (en) ELECTRIC GAS DISCHARGE LAMP
WO2006053361A1 (en) Cold cathode fluorescent lamp
CH370845A (en) Electron tubes and processes for their manufacture
DE19529465A1 (en) High pressure gas discharge lamp, in particular metal halogenide lamp - has discharge chamber, with electrodes set into ceramic ends that connect with conductors coupled to socket elements of main glass cylinder
WO2009146751A1 (en) Cable bushing with a bent foil profile
WO2007065822A2 (en) High-pressure discharge lamp comprising a ceramic discharge vessel

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

PUAL Search report despatched

Free format text: ORIGINAL CODE: 0009013

AK Designated contracting states

Kind code of ref document: A2

Designated state(s): BE DE FR GB IT NL

AK Designated contracting states

Kind code of ref document: A3

Designated state(s): BE DE FR GB IT NL

17P Request for examination filed

Effective date: 19970520

17Q First examination report despatched

Effective date: 19980608

GRAG Despatch of communication of intention to grant

Free format text: ORIGINAL CODE: EPIDOS AGRA

GRAG Despatch of communication of intention to grant

Free format text: ORIGINAL CODE: EPIDOS AGRA

GRAH Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOS IGRA

GRAH Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOS IGRA

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): BE DE FR GB IT NL

REF Corresponds to:

Ref document number: 59603552

Country of ref document: DE

Date of ref document: 19991209

ET Fr: translation filed
GBT Gb: translation of ep patent filed (gb section 77(6)(a)/1977)

Effective date: 19991223

ITF It: translation for a ep patent filed

Owner name: STUDIO JAUMANN P. & C. S.N.C.

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GB

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20000823

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: BE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20000831

PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

26N No opposition filed
BERE Be: lapsed

Owner name: PATENT-TREUHAND-G.- FUR ELEKTRISCHE GLUHLAMPEN M.

Effective date: 20000831

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: NL

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20010301

GBPC Gb: european patent ceased through non-payment of renewal fee

Effective date: 20000823

NLV4 Nl: lapsed or anulled due to non-payment of the annual fee

Effective date: 20010301

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20010501

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: FR

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20011031

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: IT

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES;WARNING: LAPSES OF ITALIAN PATENTS WITH EFFECTIVE DATE BEFORE 2007 MAY HAVE OCCURRED AT ANY TIME BEFORE 2007. THE CORRECT EFFECTIVE DATE MAY BE DIFFERENT FROM THE ONE RECORDED.

Effective date: 20050823

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: FR

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20000831