EP0230051B1 - High-pressure discharge lamp and method for its manufacture - Google Patents

High-pressure discharge lamp and method for its manufacture Download PDF

Info

Publication number
EP0230051B1
EP0230051B1 EP86118071A EP86118071A EP0230051B1 EP 0230051 B1 EP0230051 B1 EP 0230051B1 EP 86118071 A EP86118071 A EP 86118071A EP 86118071 A EP86118071 A EP 86118071A EP 0230051 B1 EP0230051 B1 EP 0230051B1
Authority
EP
European Patent Office
Prior art keywords
cap
lamp vessel
lamp
base
pressure discharge
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
EP86118071A
Other languages
German (de)
French (fr)
Other versions
EP0230051A1 (en
Inventor
Werner Eisele
Jürgen Dr. Heider
Erhard Rasch
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 EP0230051A1 publication Critical patent/EP0230051A1/en
Application granted granted Critical
Publication of EP0230051B1 publication Critical patent/EP0230051B1/en
Expired legal-status Critical Current

Links

Images

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J9/00—Apparatus or processes specially adapted for the manufacture, installation, removal, maintenance of electric discharge tubes, discharge lamps, or parts thereof; Recovery of material from discharge tubes or lamps
    • H01J9/24—Manufacture or joining of vessels, leading-in conductors or bases
    • H01J9/245—Manufacture or joining of vessels, leading-in conductors or bases specially adapted for gas discharge tubes or lamps
    • H01J9/247—Manufacture or joining of vessels, leading-in conductors or bases specially adapted for gas discharge tubes or lamps specially adapted for gas-discharge lamps
    • 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 single-ended high-pressure discharge lamp with a lamp vessel from which two current leads are led out at one end, this end of the lamp vessel being fitted into a receptacle in the base, and the current leads being connected to connections on the base.
  • JP-A 60 124 346 a metal vapor discharge lamp is known, the outer bulb of which is sealed with a plate foot melt, a flashover between the two current leads in the hollow plate tube being prevented by the plate tube being filled with an insulating material.
  • the object of the invention is to prevent flashovers in the base area in the case of discharge lamps with a base on one side.
  • the advantages achieved by the invention are, in particular, that reliable hot re-ignition of compact high-pressure discharge lamps with a base on one side is made possible with a short distance between the power supplies.
  • the intermediate layer according to the invention not only prevents a breakdown in air between the two power supply lines, but at the same time also prevents sliding spark discharge along the base-side end of the lamp vessel.
  • a particularly suitable material for the intermediate layer is in particular fibrous web, e.g. Quartz wool, glass wool or ceramic fibers, since the loose structure of the material with its interwoven fibers extends the discharge path between the power supply lines in the entire base area and, at the same time, due to its compressibility, ensures an exact adaptation to the base-side end of the lamp vessel, although this end is shaped irregularly by the squeezing process is. Fiber webs also resist the high operating temperatures in the base area, the volume change in the base area associated with the temperature increase also not impairing the exact adjustment of the intermediate layer due to the elastic properties of the fiber web. In particular, a fiber web made of ceramic fibers offers processing advantages combined with high dielectric strength.
  • fibrous web e.g. Quartz wool, glass wool or ceramic fibers
  • the figure shows a schematic representation of a preferred embodiment of a high-pressure discharge lamp according to the invention.
  • a compact metal halide high-pressure discharge lamp 1 of low power (35-150 W) is shown with an overall length of approx. 85 mm and a largest outside diameter of approx. 30 mm.
  • a discharge vessel 2 squeezed on one side contains, in addition to a filling of mercury and additions of metal halides and noble gas, two electrodes 3, 4, the shafts 5, 6 of which are made of films are melted into the pinch in a vacuum-tight manner.
  • the discharge vessel 2 is held in an evacuated outer bulb 9, which is squeezed on one side, by inner power supply wires 7, 8.
  • Both the discharge vessel 2 and the outer bulb 9 forming the actual lamp vessel in this preferred embodiment are made of quartz glass.
  • outer power supply lines 11, 12 are melted in a vacuum-tight manner by means of foils.
  • the inner power supply wires 7, 8 establish the electrical connection between the electrode shafts 5, 6 of the discharge vessel and the outer power supplies 11, 12 each via the foils.
  • the distance between the outer power supply lines 11, 12 is 12 mm.
  • the outer bulb 9 is fitted at the end 10, at which the pinch is located, into the receptacle 13 of a base 14 made of plastic.
  • the receptacle 13 is limited by the floor 15.
  • the outer power supply lines 11, 12 are soldered to connections 16, 17 on the underside of the base.
  • Ceramic fleece 19 Between the bottom 15 and the end 10 of the outer bulb 9 there is an intermediate layer 18 of a fiber web made of ceramic fibers, hereinafter referred to as ceramic fleece 19; it fills the entire space between the bottom 15 and the end 10 of the outer bulb.
  • a mat-like ceramic fleece 19 of the size 6 mm ⁇ 20 mm corresponding to the dimensions of the base 15 is first punched out of a larger piece of fiber pile with a layer thickness of approximately 3 mm and inserted into the receptacle 13 of the base 14.
  • a base device now fits the base 14 into the centered lamp vessel 9 attached above it.
  • the loose structure of the ceramic fleece 19 does not make it necessary to punch out special bores for external power supply lines 11, 12.
  • a spring regulates the contact pressure of the base 14 on the lamp vessel 9. This spring is dimensioned such that a resulting force of a maximum of about 15 N is guaranteed.
  • the layer thickness of the ceramic fleece 19 is reduced to 1.1 mm, which results in a dielectric strength of 26 kV.
  • the ignition voltages for the hot re-ignition of compact metal halide lamps in the preferred embodiment are about 15-20 kV, in the worst case a fleece thickness dr reduced to 2.4 mm due to the lamp vessel tolerances is the occurrence of Breakthroughs avoided.
  • the ceramic fleece 19 avoids flashovers in air between the outer power supply lines 11, 12.
  • the base 14 presses against the irregularly shaped end 10 of the outer bulb 9, particularly against it the squeeze groove that often forms between the power supply lines during the squeezing process.
  • sliding spark discharges which preferably occur in the pinch groove, are prevented at the same time.
  • the elasticity is also important because of the problem of material expansion due to the high operating temperature.
  • Ceramic paper could not meet these requirements by far.
  • the invention is also suitable for other embodiments of the high-pressure discharge lamp.
  • the ignition properties of metal halide lamps without an outer bulb, in which the discharge vessel is directly socketed can also be improved by means of such an intermediate layer.
  • the invention is applicable on other types of high pressure discharge lamps, e.g. High pressure sodium discharge lamps, the invention is applicable.

Landscapes

  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Vessels And Coating Films For Discharge Lamps (AREA)
  • Common Detailed Techniques For Electron Tubes Or Discharge Tubes (AREA)

Description

Die Erfindung geht aus von einer einseitig gesockelten Hochdruckentladungslampe mit einem Lampengefäß, aus dem an einem Ende zwei Stromzuführungen herausgeführt sind, wobei dieses Ende des Lampengefäßes in einer Aufnahme des Sockels eingepaßt ist, und wobei die Stromzuführungen mit Anschlüssen am Sockel verbunden sind.The invention is based on a single-ended high-pressure discharge lamp with a lamp vessel from which two current leads are led out at one end, this end of the lamp vessel being fitted into a receptacle in the base, and the current leads being connected to connections on the base.

Die Anwendungsmöglichkeit von Hochdruckentladungslampen, insbesondere Metallhalogenidlampen, wurde in letzter Zeit durch kompakte Versionen mit kleiner Leistung in der Größenordnung von 100 W erweitert. Bei diesen üblicherweise einseitig gesockelten Lampen ist im allgemeinen eine Heißwiederzündung wünschenswert, was durch geeignete Zündschaltungen erreicht wird. An der Lampe liegen dabei kurzzeitig Spannungen in der Größenordnung von 20 kV an; der genaue Wert hängt von der Leistungsstufe der Lampe ab.The possibility of using high-pressure discharge lamps, in particular metal halide lamps, has recently been expanded by compact versions with low power in the order of 100 W. In these lamps, which are usually capped on one side, hot re-ignition is generally desirable, which is achieved by suitable ignition circuits. There are brief voltages of the order of 20 kV on the lamp; the exact value depends on the power level of the lamp.

Bei diesen hohen Spannungen kommt es leicht zu Überschlägen im Sockel, da bekanntlich die Durchschlagsfestigkeit in Luft ca. 1 kV/mm beträgt, andererseits der Abstand der beiden Stromzuführungen im Sockel aufgrund der kompakten Bauweise in der Größenordnung von 10 mm liegt. Am leichtesten bilden sich derartige Überschläge als Gleitfunkenentladung zwischen den Stromzuführungen direkt am Lampengefäß aus, wo das als Dielektrikum dienende Lampengefäßmaterial die Neigung zu Überschlägen verstärkt.At these high voltages, arcing in the base is easy, since the dielectric strength in air is known to be approx. 1 kV / mm, on the other hand the distance between the two power supply lines in the base is of the order of 10 mm due to the compact design. Such flashovers are most easily formed as a sliding spark discharge between the current leads directly on the lamp vessel, where the lamp vessel material serving as a dielectric increases the tendency to flashovers.

In der US-PS 4 243 907 ist eine Halogenglühlampe beschrieben, bei der der Keramiksockel mit dem Lampengefäß in bekannter Weise mittels Sockelzement verbunden ist. Bei Glühlampen ist jedoch das Problem der Heißwiederzündung und der damit verbundenen extrem hohen Spannung (20 kV) nicht vorhanden.US Pat. No. 4,243,907 describes a halogen incandescent lamp in which the ceramic base is connected to the lamp vessel in a known manner by means of base cement. In the case of incandescent lamps, however, the problem of hot re-ignition and the extremely high voltage (20 kV) associated therewith does not exist.

Aus der JP-A 60 124 346 ist eine Metalldampf-Entladungslampe bekannt, deren Außenkolben mit einer Tellerfußeinschmelzung verschlossen ist, wobei ein Überschlag zwischen den beiden Stromzuführungen im hohlen Tellerrohr dadurch verhindert wird, daß das Tellerrohr mit einem isolierenden Material ausgefüllt ist.From JP-A 60 124 346 a metal vapor discharge lamp is known, the outer bulb of which is sealed with a plate foot melt, a flashover between the two current leads in the hollow plate tube being prevented by the plate tube being filled with an insulating material.

Der Erfindung liegt die Aufgabe zugrunde, bei einseitig gesockelten Entladungslampen Überschläge im Sockelbereich zu verhindern. Insbesondere ist es Aufgabe der Erfindung, sowohl Überschläge in Luft als auch Gleitfunkenentladungen direkt am Lampengefäß zwischen den Stromzuführungen auf einfache und kostengünstige Art zu vermeiden.The object of the invention is to prevent flashovers in the base area in the case of discharge lamps with a base on one side. In particular, it is an object of the invention to avoid flashovers in air as well as sliding spark discharges directly on the lamp vessel between the current leads in a simple and inexpensive manner.

Diese Aufgaben werden bei einer Hochdruckentladungslampe nach dem Oberbegriff des Anspruchs 1 erfindungsgemäß dadurch gelöst, daß sich zwischen dem Lampengefäß und dem Sockel eine Zwischenlage befindet, die aus einem Faserflor hoher Temperatur- und Durchschlagsfestigkeit besteht, und die mindestens im Bereich zwischen den beiden Stromzuführungen sowohl am Lampengefäß dicht anliegt als auch den Raum zwischen dem Boden der Aufnahme des Sockels und dem sockelseitigen Ende des Lampengefäßes vollständig ausfüllt. Insbesondere wird als Material Keramikfasern bevorzugt. Bei der Herstellung der Hochdruckentladungslampe werden folgende Verfahrensschritte ausgeführt:

  • - Abtrennen eines mattenartigen Teils mit bestimmter Schichtdicke von einem größeren Vorratsstück des durchschlagsfesten Faserflors
  • -Einlegen des mattenartigen Teils in die Aufnahme des Sockels
  • - Zentrieren von Lampengefäß und Sockel zueinander
  • - Gegeneinanderpressen von Lampengefäß und Sockel, wobei das als Zwischenlage dienende mattenartige Teil komprimiert, d.h. in seiner Schichtdicke reduziert wird
  • - Befestigen des Sockels am Lampengefäß
These objects are achieved in a high-pressure discharge lamp according to the preamble of claim 1 in that there is an intermediate layer between the lamp vessel and the base, which consists of a fiber pile of high temperature and dielectric strength, and at least in the area between the two power supplies both on Lamp vessel fits tightly and also completely fills the space between the bottom of the receptacle of the base and the base-side end of the lamp vessel. In particular, ceramic fibers are preferred as the material. The following process steps are carried out in the manufacture of the high-pressure discharge lamp:
  • - Removing a mat-like part with a certain layer thickness from a larger stock of the impact-resistant fiber pile
  • -Insert the mat-like part into the socket holder
  • - Center the lamp vessel and base to each other
  • - Pressing the lamp vessel and base against each other, the mat-like part serving as an intermediate layer being compressed, ie reduced in its layer thickness
  • - Attach the base to the lamp vessel

Die mit der Erfindung erzielten Vorteile bestehen insbesondere darin, daß eine zuverlässige Heißwiederzündung kompakter einseitig gesockelter Hochdruckentladungslampen mit geringem Abstand der Stromzuführungen ermöglicht wird. Dabei verhindert die erfindungsgemäße Zwischenlage nicht nur einen Durchschlag in Luft zwischen den beiden Stromzuführungen, sondern gleichzeitig auch eine Gleitfunkenentladung entlang des sockelseitigen Endes des Lampengefäßes.The advantages achieved by the invention are, in particular, that reliable hot re-ignition of compact high-pressure discharge lamps with a base on one side is made possible with a short distance between the power supplies. The intermediate layer according to the invention not only prevents a breakdown in air between the two power supply lines, but at the same time also prevents sliding spark discharge along the base-side end of the lamp vessel.

Ein besonders geeignetes Material für die Zwischenlage ist insbesondere Faserflor, z.B. Quarzwolle, Glaswolle oder Keramikfasern, da die lockere Struktur des Materials mit seinen ineinander verwobenen Fasern den Entladungsweg zwischen den Stromzuführungen im gesamten Sockelbereich verlängert und gleichzeitig infolge seiner Komprimierbarkeit eine genaue Anpassung an das sockelseitige Ende des Lampengefäßes gewährleistet, obwohl dieses Ende durch den Quetschvorgang unregelmäßig geformt ist. Faserflore widerstehen zudem den hohen Betriebstemperaturen im Sockelbereich, wobei auch die mit der Temperaturerhöhung verbundene Volumenänderung im Sockelbereich die genaue Anpassung der Zwischenlage infolge der elastischen Eigenschaften der Faserflore nicht beeinträchtigt. Insbesondere bietet ein Faserflor aus Keramikfasern bearbeitungstechnische Vorteile verbunden mit hoher Durchschlagsfestigkeit.A particularly suitable material for the intermediate layer is in particular fibrous web, e.g. Quartz wool, glass wool or ceramic fibers, since the loose structure of the material with its interwoven fibers extends the discharge path between the power supply lines in the entire base area and, at the same time, due to its compressibility, ensures an exact adaptation to the base-side end of the lamp vessel, although this end is shaped irregularly by the squeezing process is. Fiber webs also resist the high operating temperatures in the base area, the volume change in the base area associated with the temperature increase also not impairing the exact adjustment of the intermediate layer due to the elastic properties of the fiber web. In particular, a fiber web made of ceramic fibers offers processing advantages combined with high dielectric strength.

Der Einbau derartiger Zwischenlagen zwischen Sockel und Lampengefäß läßt sich denkbar einfach in den an sich bekannten Ablauf der Fertigung integrieren und erfordert praktisch keinen zusätzlichen Zeitaufwand. Dabei wird der Arbeitsgang des Gegeneinanderpressens von Lampengefäß und Sockel dazu benutzt, die Durchschlagsfestigkeit der dabei komprimierten Zwischenlage noch zu erhöhen.The installation of such intermediate layers between the base and the lamp vessel can be very easily integrated into the known manufacturing process and practically requires no additional time. The process of pressing the lamp vessel and base against one another is used to increase the dielectric strength of the intermediate layer compressed in the process.

Die Erfindung soll nun anhand von Ausführungsbeispielen näher erläutert werden.The invention will now be explained in more detail using exemplary embodiments.

Die Figur zeigt eine schematische Darstellung eines bevorzugten Ausführungsbeispiels einer Hochdruckentladungslampe gemäß der Erfindung.The figure shows a schematic representation of a preferred embodiment of a high-pressure discharge lamp according to the invention.

In der Figur ist eine kompakte Metallhalogenid-Hochdruckentladungslampe 1 kleiner Leistung (35-150 W) gezeigt mit einer Gesamtlänge von ca. 85 mm und einem größten Außendurchmesser von ca. 30 mm. Ein einseitig gequetschtes Entladungsgefäß 2 enthält neben einer Füllung aus Quecksilber sowie Zusätzen von Metallhalogeniden und Edelgas zwei Elektroden 3, 4, deren Schäfte 5, 6 mittels Folien vakuumdicht in die Quetschung eingeschmolzen sind. Das Entladungsgefäß 2 ist durch innere Stromzuführungsdrähte 7, 8 in einem evakuierten, einseitig gequetschten Außenkolben 9 gehaltert. Sowohl das Entladungsgefäß 2 als auch der in dieser bevorzugten Ausführungsform das eigentliche Lampengefäß bildende Außenkolben 9 sind aus Quarzglas gefertigt. An dem Ende 10 des Außenkolbens 9, an dem sich die Quetschung befindet, sind äußere Stromzuführungen 11, 12 mittels Folien vakuumdicht eingeschmolzen. Die inneren Stromzuführungsdrähte 7, 8 stellen die elektrische Verbindung zwischen den Elektrodenschäften 5, 6 des Entladungsgefäßes und den äußeren Stromzuführungen 11, 12 jeweils über die Folien her. Der Abstand der äußeren Stromzuführungen 11, 12 voneinander beträgt dabei 12 mm.In the figure, a compact metal halide high-pressure discharge lamp 1 of low power (35-150 W) is shown with an overall length of approx. 85 mm and a largest outside diameter of approx. 30 mm. A discharge vessel 2 squeezed on one side contains, in addition to a filling of mercury and additions of metal halides and noble gas, two electrodes 3, 4, the shafts 5, 6 of which are made of films are melted into the pinch in a vacuum-tight manner. The discharge vessel 2 is held in an evacuated outer bulb 9, which is squeezed on one side, by inner power supply wires 7, 8. Both the discharge vessel 2 and the outer bulb 9 forming the actual lamp vessel in this preferred embodiment are made of quartz glass. At the end 10 of the outer bulb 9, at which the pinch is located, outer power supply lines 11, 12 are melted in a vacuum-tight manner by means of foils. The inner power supply wires 7, 8 establish the electrical connection between the electrode shafts 5, 6 of the discharge vessel and the outer power supplies 11, 12 each via the foils. The distance between the outer power supply lines 11, 12 is 12 mm.

Der Außenkolben 9 ist an dem Ende 10, an dem sich die Quetschung befindet, in die Aufnahme 13 eines Sockels 14 aus Kunststoff eingepaßt. Die Aufnahme 13 wird durch den Boden 15 begrenzt. Die äußeren Stromzuführungen 11, 12 sind mit Anschlüssen 16, 17 an der Sockelunterseite verlötet.The outer bulb 9 is fitted at the end 10, at which the pinch is located, into the receptacle 13 of a base 14 made of plastic. The receptacle 13 is limited by the floor 15. The outer power supply lines 11, 12 are soldered to connections 16, 17 on the underside of the base.

Zwischen dem Boden 15 und dem Ende 10 des Außenkolbens 9 befindet sich als Zwischenlage 18 ein Faserflor aus Keramikfasern, im folgenden als Keramikvlies 19 bezeichnet; es füllt den gesamten Raum zwischen dem Boden 15 und dem Ende 10 des Außenkolbens aus.Between the bottom 15 and the end 10 of the outer bulb 9 there is an intermediate layer 18 of a fiber web made of ceramic fibers, hereinafter referred to as ceramic fleece 19; it fills the entire space between the bottom 15 and the end 10 of the outer bulb.

Zur Herstellung der Zwischenlage 18 wird zunächst aus einem größeren Vorratsstück des Faserflors mit einer Schichtdicke von ca. 3 mm ein den Abmessungen des Bodens 15 entsprechendes mattenartiges Keramikvlies 19 der Größe 6 mm x 20 mm ausgestanzt und in die Aufnahme 13 des Sockels 14 eingesetzt. Eine Sockelungsvorrichtung paßt nun den Sockel 14 in das darüber angebrachte zentrierte Lampengefäß 9 ein. Die lockere Struktur des Keramikvlieses 19 macht es dabei nicht erforderlich, spezielle Bohrungen für äußeren Stromzuführungen 11, 12 auszustanzen. Eine Feder reguliert den Anpreßdruck des Sockels 14 auf das Lampengefäß 9. Diese Feder ist derart dimensioniert, daß eine resultierende Kraft von maximal etwa 15 N gewährleistet ist. Dabei wird die Schichtdicke des Keramikvlieses 19 bis auf 1,1 mm reduziert, wodurch sich eine Durchschlagsfestigkeit von 26 kV ergibt. Der Zusammenhang zwischen Durchschlagsfestigkeit Uo und reduzierter Vliesdicke dr als Funktion der Anpreßkraft K ist in der Tabelle dargestellt. Die Kenntnis dieses Zusammenhangs ist deshalb von Bedeutung, weil der Quetschvorgang eine unregelmäßige Form des Endes 10 des Außenkolbens bedingt. Aufgrund der dabei entstehenden unvermeidlichen Toleranzen in der Lampengefäßlänge treten bei einer gleichzeitigen Einhaltung des Einstellma- ßes Toleranzen in der reduzierten Vliesdicke in der Größenordnung von 100 % auf, entsprechend einer Vliesdicke dr von mehr als 2 mm.

Figure imgb0001
To produce the intermediate layer 18, a mat-like ceramic fleece 19 of the size 6 mm × 20 mm corresponding to the dimensions of the base 15 is first punched out of a larger piece of fiber pile with a layer thickness of approximately 3 mm and inserted into the receptacle 13 of the base 14. A base device now fits the base 14 into the centered lamp vessel 9 attached above it. The loose structure of the ceramic fleece 19 does not make it necessary to punch out special bores for external power supply lines 11, 12. A spring regulates the contact pressure of the base 14 on the lamp vessel 9. This spring is dimensioned such that a resulting force of a maximum of about 15 N is guaranteed. The layer thickness of the ceramic fleece 19 is reduced to 1.1 mm, which results in a dielectric strength of 26 kV. The relationship between dielectric strength Uo and reduced fleece thickness d r as a function of contact pressure K is shown in the table. Knowing this relationship is important because the squeezing process requires an irregular shape of the end 10 of the outer bulb. Due to the unavoidable tolerances in the length of the lamp vessel, tolerances in the reduced fleece thickness of the order of 100%, while corresponding to the setting dimension, correspond to a fleece thickness d r of more than 2 mm.
Figure imgb0001

Da die Zündspannungen für das Heißwiederzünden von kompakten Metallhalogenidlampen in der bevorzugten Ausführungsform je nach Lampenleistung (35-150 W) etwa 15-20 kV betragen, ist bereits im ungünstigsten Fall einer wegen der Lampengefäßtoleranzen nur auf 2,4 mm reduzierten Vliesdicke dr das Auftreten von Durchschlägen vermieden.Since the ignition voltages for the hot re-ignition of compact metal halide lamps in the preferred embodiment, depending on the lamp power (35-150 W), are about 15-20 kV, in the worst case a fleece thickness dr reduced to 2.4 mm due to the lamp vessel tolerances is the occurrence of Breakthroughs avoided.

Das Keramikvlies 19 vermeidet Überschläge in Luft zwischen den äußeren Stromzuführungen 11, 12. Darüber hinaus liegt es auch aufgrund seiner lockeren Struktur und der damit verbundenen Formbarkeit und Elastizität durch das Anpressen des Sockels 14 am unregelmäßig geformten Ende 10 des Außenkolbes 9 dicht an, insbesondere an der häufig zwischen den Stromzuführungen beim Quetschvorgang sich bildenden Quetschfurche. Somit werden gleichzeitig Gleitfunkenentladungen, die bevorzugt gerade in der Quetschfurche auftreten, verhindert. Die Elastizität ist dabei zusätzlich noch wegen der infolgen der hohen Betriebstemperatur auftretenden Problematik der Materialausdehnung von Bedeutung.The ceramic fleece 19 avoids flashovers in air between the outer power supply lines 11, 12. In addition, due to its loose structure and the associated formability and elasticity, the base 14 presses against the irregularly shaped end 10 of the outer bulb 9, particularly against it the squeeze groove that often forms between the power supply lines during the squeezing process. At the same time, sliding spark discharges, which preferably occur in the pinch groove, are prevented at the same time. The elasticity is also important because of the problem of material expansion due to the high operating temperature.

Andere Materialien mit geringerer Formbarkeit und Elastizität, z.B. Keramikpapier, konnten diese Anforderungen bei weitem nicht so gut erfüllen.Other materials with less formability and elasticity, e.g. Ceramic paper could not meet these requirements by far.

Die Erfindung eignet sich auch für andere Ausführungsformen der Hochdruckentladungslampe. Insbesondere können auch die Zündeigenschaften von Metallhalogenidlampen ohne Außenkolben, bei denen das Entladungsgefäß direkt gesockelt ist, mittels einer derartigen Zwischenlage verbessert werden. Auch auf andere Arten von Hochdruckentladungslampen, z.B. Natriumhochdruckentladungslampen, ist die Erfindung anwendbar.The invention is also suitable for other embodiments of the high-pressure discharge lamp. In particular, the ignition properties of metal halide lamps without an outer bulb, in which the discharge vessel is directly socketed, can also be improved by means of such an intermediate layer. Also on other types of high pressure discharge lamps, e.g. High pressure sodium discharge lamps, the invention is applicable.

Claims (3)

1. A high pressure discharge lamp (1) capped at one end comprising a lamp vessel (9) from one end (10) of which there lead two current supply lines (11, 12), where this end (10) of the lamp vessel (9) is fitted into a holder (13) of the cap (14) and where the current supply lines (11, 12) are connected by terminals (16, 17) to the cap (14), characterised in that between the lamp vessel (9) and the cap (14) is arranged an intermediate layer (18) which comprises a fibrous web (19) with a high heat resistance and dielectric strength and which, at least in the region between the two current supply lines (11, 12), not only closely contacts the lamp vessel (9) but also completely fills the space between the base (15) of the holder (13) of the cap (14) and the cap-end (10) of the lamp vessel (9).
2. A high pressure discharge lamp as claimed in claim 1, characterised in that the fibrous web (19) comprises ceramic fibres.
3. A process for the production of a high pressure discharge lamp as claimed in claim 1 or claim 2, characterised by the following process steps:
- separation of a mat-like component with a specific layer thickness from a larger supply length of the high dielectric strength fibrous web,
- insertion of the mat-like component into the cap holder,
- centering of lamp vessel and cap relative to one another,
- pressing of lamp vessel and cap one against the other, where the mat-like component which serves as intermediate layer is compressed, i.e. is reduced in its layer thickness,
- attachment of the cap to the lamp vessel.
EP86118071A 1986-01-15 1986-12-24 High-pressure discharge lamp and method for its manufacture Expired EP0230051B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3600991 1986-01-15
DE19863600991 DE3600991A1 (en) 1986-01-15 1986-01-15 HIGH PRESSURE DISCHARGE LAMP AND METHOD FOR THEIR PRODUCTION

Publications (2)

Publication Number Publication Date
EP0230051A1 EP0230051A1 (en) 1987-07-29
EP0230051B1 true EP0230051B1 (en) 1989-06-21

Family

ID=6291890

Family Applications (1)

Application Number Title Priority Date Filing Date
EP86118071A Expired EP0230051B1 (en) 1986-01-15 1986-12-24 High-pressure discharge lamp and method for its manufacture

Country Status (4)

Country Link
US (1) US4754195A (en)
EP (1) EP0230051B1 (en)
JP (1) JPS62170145A (en)
DE (2) DE3600991A1 (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DD280630A1 (en) * 1989-03-14 1990-07-11 Narva Gluehlampen SINGLE-SIDED DISCHARGE LAMP WITH ENHANCED HIGH VOLTAGE STRENGTH
GB8913798D0 (en) * 1989-06-15 1989-08-02 Emi Plc Thorn Arc tube for a high pressure discharge lamp
US6262534B1 (en) 1998-11-12 2001-07-17 Philips Electronics North America Corp. Lamp having light source mounted directly to stem
CN110645553B (en) * 2013-12-19 2020-09-29 应用材料公司 Adapter for replaceable lamp

Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3934067A (en) * 1974-07-17 1976-01-20 Western Electric Company, Inc. Laminar structure having an impregnated fibrous web
SE389426B (en) * 1976-02-27 1976-11-01 Lumalampan Ab ADDITION TO SOCKET KIT FOR ELECTRIC LAMPS
CH637326A5 (en) * 1978-12-18 1983-07-29 Micafil Ag Laminated moulding for the insulation, subject to high mechanical and electrical loads, of electrical machines and apparatus
US4243907A (en) * 1979-07-05 1981-01-06 Gte Products Corporation Lamp having reduced width press-seal
JPS5717714U (en) * 1980-07-03 1982-01-29
CA1176687A (en) * 1981-06-06 1984-10-23 Robert Hall Bi pin base for single ended discharge lamp
US4570104A (en) * 1982-11-02 1986-02-11 U.S. Philips Corporation Electric lamp having a fuse in a feed-through molding
US4568854A (en) * 1983-10-27 1986-02-04 Gte Products Corporation Tungsten halogen lamp with heat-dissipating base
JPS60124346A (en) * 1983-12-09 1985-07-03 Mitsubishi Electric Corp Metallic vapor discharge lamp
DD227823A1 (en) * 1984-04-24 1985-09-25 Sprela Werke Spremberg Veb FLAME-RESISTANT ELECTRO-INSULATING LUBRICANTS
US4631446A (en) * 1984-05-04 1986-12-23 Gte Products Corporation Single-ended high intensity discharge lamp
DE3425894A1 (en) * 1984-07-13 1986-01-23 Patent-Treuhand-Gesellschaft für elektrische Glühlampen mbH, 8000 München ELECTRIC LAMP

Also Published As

Publication number Publication date
EP0230051A1 (en) 1987-07-29
US4754195A (en) 1988-06-28
DE3664080D1 (en) 1989-07-27
JPS62170145A (en) 1987-07-27
JPH0551141B2 (en) 1993-07-30
DE3600991A1 (en) 1987-07-16

Similar Documents

Publication Publication Date Title
DE69820992T2 (en) HIGH PRESSURE DISCHARGE LAMP
DE69804192T2 (en) HIGH PRESSURE DISCHARGE LAMP WITH UV AMPLIFIER
EP2483913B1 (en) High pressure discharge lamp having a starting aid
DE69305586T2 (en) Electric lamp
DE69610127T2 (en) Ignition aid for metal halide lamps
DE69318200T2 (en) Gas discharge lamp with extinguishing mechanism at the end of its service life
DE69926445T2 (en) High-pressure discharge lamp
DE69405181T2 (en) High pressure discharge lamp
DE9004811U1 (en) High pressure discharge lamp
DE19618967A1 (en) Gas discharge lamp
EP0230051B1 (en) High-pressure discharge lamp and method for its manufacture
DE2627380C3 (en) Metal vapor high pressure discharge lamp for horizontal operation
DE2625554C2 (en) Wall-stabilized flash tube
DE10030807B4 (en) A method of manufacturing an arc tube for a discharge lamp unit
EP0566975A1 (en) Single-ended high pressure discharge lamp
DE69103912T2 (en) Unilateral metal vapor discharge lamp.
DE10081618B4 (en) Metal halide high-pressure discharge lamp
EP1351278B1 (en) Metal halide lamp with ceramic discharge vessel
DE3544465A1 (en) Gas-discharge lamp and a method for its production
DE2645794C3 (en) Rectangular fluorescent lamp and process for its manufacture
DE8600847U1 (en) High pressure discharge lamp
DE112009004391B4 (en) Surge absorber
DE3147705A1 (en) START-UP AID FOR NON-LINEAR DISCHARGE LAMPS AND METHOD FOR THE PRODUCTION THEREOF
DE102006026749A1 (en) High pressure discharge lamp with improved ignitability and high voltage pulse generator
DE2549419C3 (en) Rectangular fluorescent lamp and process for its manufacture

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

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): DE FR GB IT

17P Request for examination filed

Effective date: 19870826

17Q First examination report despatched

Effective date: 19880513

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): DE FR GB IT

GBT Gb: translation of ep patent filed (gb section 77(6)(a)/1977)
REF Corresponds to:

Ref document number: 3664080

Country of ref document: DE

Date of ref document: 19890727

RAP4 Party data changed (patent owner data changed or rights of a patent transferred)

Owner name: PATENT-TREUHAND-GESELLSCHAFT FUER ELEKTRISCHE GLUE

ET Fr: translation filed
ITF It: translation for a ep patent filed
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
ITTA It: last paid annual fee
PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: FR

Payment date: 19971219

Year of fee payment: 12

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: 19990831

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST

REG Reference to a national code

Ref country code: GB

Ref legal event code: IF02

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 20020218

Year of fee payment: 16

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: GB

Payment date: 20021205

Year of fee payment: 17

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: 20030701

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: 20031224

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

Effective date: 20031224

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: 20051224