EP0277488B1 - Discharge lamp, particularly a flash tube - Google Patents
Discharge lamp, particularly a flash tube Download PDFInfo
- Publication number
- EP0277488B1 EP0277488B1 EP88100260A EP88100260A EP0277488B1 EP 0277488 B1 EP0277488 B1 EP 0277488B1 EP 88100260 A EP88100260 A EP 88100260A EP 88100260 A EP88100260 A EP 88100260A EP 0277488 B1 EP0277488 B1 EP 0277488B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- electrode
- discharge lamp
- outer end
- metal layer
- glass housing
- 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
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
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J5/00—Details relating to vessels or to leading-in conductors common to two or more basic types of discharge tubes or lamps
- H01J5/46—Leading-in conductors
-
- 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
- H01J9/28—Manufacture of leading-in conductors
Definitions
- the invention relates to a discharge lamp with a tubular, closed glass housing, at the opposite ends of which electrodes made of metal which is difficult to melt are melted.
- the document DE-A 3 329 270 describes a discharge lamp according to the preamble of claims 1 and 2, the electrodes connecting wires made of e.g. Are tungsten (see claim 6).
- Discharge lamps of this type are also known, in which the electrodes are formed from tungsten pins which are connected at their outer ends to soft-solderable metal pins by means of electrical resistance welding.
- the connecting wires can then be soldered to the metal pins by means of soft solder, but welding the soft-solderable metal pins means a considerable outlay in terms of production technology.
- the invention has for its object to design a discharge lamp of the type mentioned in such a way that the manufacturing outlay for creating a soft-solderable connection point to the electrodes is low and the solder connection of the connecting wires to the electrodes can be produced in a simple manner.
- This object is achieved in that little least one electrode protrudes with its outer end from the glass housing and is surrounded at least on the outer surface of its outer end by a soft solderable metal layer.
- the metal layer can be formed by a soft solderable braze or a thin metal coating.
- the manufacturing outlay for producing the metal layer is low.
- the solder connection between the electrode and the connecting wire can be produced in a simple manner, since, owing to the fact that the outer end of the electrode is provided on its outer surface with the metal layer, a sufficiently large soldering area is available even if the electrode is only has a very small diameter.
- At least one electrode has its outer end approximately flush with the glass housing and the glass housing is provided at its area surrounding the outer end of the electrode with a soft-solderable metal layer that is electrically conductively connected to the electrode.
- a soft-solderable metal layer that is electrically conductively connected to the electrode.
- the metal layer which can be formed either by a metal disc which coaxially surrounds the outer end of the electrode and is conductively connected to the electrode, or by a thin metal coating which also covers the outer end of the electrode, there is a sufficiently large soldering area to to be able to solder the connecting wire without any problems.
- the metal layer can be produced with only a small manufacturing outlay.
- FIGS. 1 to 4 one end of a flash lamp is shown, which has a tubular glass housing 1 made of hard glass, in which two electrodes are melted at the two ends, of which only one electrode 2 is shown in FIGS. 1 to 4 .
- the electrode 2 protrudes somewhat outward at its outer end and is enclosed by a hard solder 3, which allows a soft solder connection with a connecting wire.
- a metal coating 4 is provided at the free end of the electrode 2 instead of the hard solder 3 in FIG. 1. Both this metal coating 4 and the hard solder 3 can be soldered.
- the metal coating 4 can be vapor-deposited, sputtered on, galvanically applied or sprayed on.
- FIG. 3 shows a flash lamp in which the outer end of the electrode 2 is approximately flush with the glass housing 1. It is covered by a metal coating 5 made of soft solderable metal, which also covers the glass. The metal coating 5 can be sputtered on or sprayed on.
- the end of the electrode 2, which is also flush with the glass housing 1, is enclosed by a metal disk 6 made of soft-solderable material, which is electrically connected to the outer end of the electrode 2 with the aid of a hard solder 7.
- the examples according to FIGS. 1 and 2 have in common that the metal layer, which is formed by the hard solder 3 or the metal coating 4, encloses the electrode end protruding from the glass housing 1.
- the examples according to FIGS. 3 and 4 have in common that the outer electrode end is approximately flush with the glass housing 1 and is covered by a metal layer which in the example according to FIG. 3 is covered by the metal coating 5 and in the example according to FIG. 4 is formed by the metal disc 6, which is connected to the electrode 2 by the hard solder 7.
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Vessels And Coating Films For Discharge Lamps (AREA)
Abstract
Description
Die Erfindung betrifft eine Entladungslampe mit einem rohrförmigen, geschlossenen Glasgehäuse, an dessen gegenüberliegenden Enden Elektroden aus schwer schmelzbarem Metall eingeschmolzen sind.The invention relates to a discharge lamp with a tubular, closed glass housing, at the opposite ends of which electrodes made of metal which is difficult to melt are melted.
Die Druckschrift DE-A 3 329 270 beschreibt eine Entladungslampe nach dem Oberbegriff der Ansprüche 1 und 2, wobei die Elektroden Anschlußdrähte aus z.B. Wolfram sind (vgl. Anspruch 6).The document DE-A 3 329 270 describes a discharge lamp according to the preamble of
Es sind auch Entladungslampen dieser Art bekannt, bei denen die Elektroden von Wolframstiften gebildet sind, die an ihren äußeren Enden mit weichlötbaren Metallstiften durch elektrische Widerstandsschweißung verbunden sind. Die Anschlußdrähte können dann an den Metallstiften durch Weichlot angelötet werden, jedoch bedeutet das Anschweißen der weichlötbaren Metallstifte einen erheblichen fertigungstechnischen Aufwand.Discharge lamps of this type are also known, in which the electrodes are formed from tungsten pins which are connected at their outer ends to soft-solderable metal pins by means of electrical resistance welding. The connecting wires can then be soldered to the metal pins by means of soft solder, but welding the soft-solderable metal pins means a considerable outlay in terms of production technology.
Bei Entladungslampen der eingangs genannten Art besteht außerdem die Möglichkeit, die Stirnflächen der Elektroden mit einem weichlötbaren Hartlot zu überziehen, um dann die Anschlußdrähte durch Weichlöten befestigen zu können. Zwar ist in diesem Falle der fertigungstechnische Aufwand gering, der erforderlich ist, um die Elektroden mit einer weichlötbaren Verbindungsstelle zu versehen, jedoch bereitet das Verlöten der Anschlußdrähte mit den Stirnflächen der Elektroden, die oftmals einen Durchmesser von nur einem Millimeter und darunter aufweisen, Schwierigkeiten.In the case of discharge lamps of the type mentioned at the outset, there is also the possibility of coating the end faces of the electrodes with a soft-solderable hard solder, in order then to be able to fasten the connecting wires by soft soldering. In this case, the manufacturing outlay required to provide the electrodes with a soft-solderable connection point is small, but the soldering of the connecting wires to the end faces of the electrodes, which often have a diameter of only one millimeter and less, is difficult.
Der Erfindung liegt die Aufgabe zugrunde, eine Entladungslampe der eingangs genannten Art so auszubilden, daß der fertigungstechnische Aufwand für die Schaffung einer weichlötbaren Verbindungsstelle zu den Elektroden gering ist und die Lötverbindung der Anschlußdrähte mit den Elektroden auf einfache Weise herstellbar ist.The invention has for its object to design a discharge lamp of the type mentioned in such a way that the manufacturing outlay for creating a soft-solderable connection point to the electrodes is low and the solder connection of the connecting wires to the electrodes can be produced in a simple manner.
Diese Aufgabe ist erfindungsgemäß dadurch gelöst, daß wenig stens eine Elektrode mit ihrem äußeren Ende aus dem Glasgehäuse herausragt und wenigstens an der Mantelfläche ihres äußeren Endes von einer weichlötbaren Metallschicht umgeben ist. Dabei kann die Metallschicht von einem weichlötbaren Hartlot oder einem dünnen Metallüberzug gebildet sein. Der fertigungstechnische Aufwand zur Herstellung der Metallschicht ist gering. Ausserdem kann die Lötverbindung zwischen der Elektrode und dem Anschlußdraht auf einfache Weise hergestellt werden, da infolge des Umstandes, daß das äußere Ende der Elektrode an seiner Mantelfläche mit der Metallschicht versehen ist, auch dann eine ausreichend große Lötfläche zur Verfügung steht, wenn die Elektrode nur einen sehr geringen Durchmesser aufweist.This object is achieved in that little least one electrode protrudes with its outer end from the glass housing and is surrounded at least on the outer surface of its outer end by a soft solderable metal layer. The metal layer can be formed by a soft solderable braze or a thin metal coating. The manufacturing outlay for producing the metal layer is low. In addition, the solder connection between the electrode and the connecting wire can be produced in a simple manner, since, owing to the fact that the outer end of the electrode is provided on its outer surface with the metal layer, a sufficiently large soldering area is available even if the electrode is only has a very small diameter.
Eine andere erfindungsgemäße Lösung der genannten Aufgabe sieht vor, daß wenigstens eine Elektrode mit ihrem äußeren Ende etwa bündig mit dem Glasgehäuse abschließt und das Glasgehäuse an seinem das äußere Ende der Elektrode umgebenden Bereich mit einer mit der Elektrode elektrisch leitend verbundenen, weichlötbaren Metallschicht versehen ist. Auch hier ist infolge der Metallschicht, die entweder durch eine das äußere Ende der Elektrode koaxial umschließende, mit der Elektrode leitend verbundene Metallscheibe oder einen dünnen Metallüberzug, der auch das äußere Ende der Elektrode überdeckt, gebildet sein kann, eine ausreichend große Lötfläche vorhanden, um den Anschlußdraht problemlos anlöten zu können. Außerdem kann die Metallschicht mit nur einem geringen fertigungstechnischen Aufwand hergestellt werden.Another solution according to the invention provides that at least one electrode has its outer end approximately flush with the glass housing and the glass housing is provided at its area surrounding the outer end of the electrode with a soft-solderable metal layer that is electrically conductively connected to the electrode. Here too, as a result of the metal layer, which can be formed either by a metal disc which coaxially surrounds the outer end of the electrode and is conductively connected to the electrode, or by a thin metal coating which also covers the outer end of the electrode, there is a sufficiently large soldering area to to be able to solder the connecting wire without any problems. In addition, the metal layer can be produced with only a small manufacturing outlay.
Die Erfindung ist nachfolgend anhand von vier in den Fig. 1 bis 4 dargestellten Ausführungsbeispielen näher erläutert.The invention is explained in more detail below with reference to four exemplary embodiments shown in FIGS. 1 to 4.
In den Fig. 1 bis 4 ist das eine Ende einer Blitzlampe dargestellt, die ein rohrförmiges Glasgehäuse 1 aus Hartglas aufweist, in dem an den beiden Enden zwei Elektroden eingeschmolzen sind, von denen in den Fig. 1 bis 4 nur eine Elektrode 2 dargestellt ist.1 to 4, one end of a flash lamp is shown, which has a
Bei dem Ausführungsbeispiel gemäß Fig. 1 ragt die Elektrode 2 an ihrem äußeren Ende etwas nach außen und ist von einem Hartlot 3 umschlossen, das eine Weichlotverbindung mit einem Anschlußdraht erlaubt.In the exemplary embodiment according to FIG. 1, the
Bei dem Beispiel gemäß Fig. 2 ist anstelle des Hartlotes 3 in Fig. 1 ein Metallüberzug 4 am freien Ende der Elektrode 2 vorgesehen. Sowohl dieser Metallüberzug 4 als auch das Hartlot 3 sind weichlötbar. Der Metallüberzug 4 kann aufgedampft, aufgesputtert, galvanisch aufgebracht oder aufgespritzt sein.In the example according to FIG. 2, a metal coating 4 is provided at the free end of the
Die Fig. 3 zeigt eine Blitzlampe, bei der das äußere Ende der Elektrode 2 etwa bündig mit dem Glasgehäuse 1 abschließt. Es ist von einem Metallüberzug 5 aus weichlötbarem Metall überzogen, der auch das Glas abdeckt. Der Metallüberzug 5 kann aufgesputtert oder aufgespritzt sein.FIG. 3 shows a flash lamp in which the outer end of the
Bei dem Beispiel gemäß Fig. 4 ist das ebenfalls bündig mit dem Glasgehäuse 1 abschließende Ende der Elektrode 2 von einer Metallscheibe 6 aus weichlötbarem Material umschlossen, die mit Hilfe eines Hartlotes 7 mit dem äußeren Ende der Elektrode 2 elektrisch verbunden ist.In the example according to FIG. 4, the end of the
Den Beispielen gemäß den Fig. 1 und 2 ist gemeinsam, daß die Metallschicht, die von dem Hartlot 3 bzw. dem Metallüberzug 4 gebildet ist, das aus dem Glasgehäuse 1 herausragende Elektrodenende umschließt. Den Beispielen gemäß den Fig. 3 und 4 ist gemeinsam, daß das äußere Elektrodenende etwa bündig mit dem Glasgehäuse 1 abschließt und von einer Metallschicht überzogen ist, die bei dem Beispiel gemäß Fig. 3 von dem Metallüberzug 5 und bei dem Beispiel gemäß Fig. 4 von der Metallscheibe 6 gebildet ist, welche durch das Hartlot 7 mit der Elektrode 2 verbunden ist.The examples according to FIGS. 1 and 2 have in common that the metal layer, which is formed by the hard solder 3 or the metal coating 4, encloses the electrode end protruding from the
Claims (9)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE8701119U DE8701119U1 (en) | 1987-01-23 | 1987-01-23 | Discharge lamp, especially flash tube |
DE8701119U | 1987-01-23 |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0277488A1 EP0277488A1 (en) | 1988-08-10 |
EP0277488B1 true EP0277488B1 (en) | 1990-09-12 |
Family
ID=6803933
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP88100260A Expired - Lifetime EP0277488B1 (en) | 1987-01-23 | 1988-01-11 | Discharge lamp, particularly a flash tube |
Country Status (5)
Country | Link |
---|---|
US (1) | US4987341A (en) |
EP (1) | EP0277488B1 (en) |
JP (1) | JPH054682Y2 (en) |
DE (2) | DE8701119U1 (en) |
HK (1) | HK36892A (en) |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE19913297C1 (en) * | 1999-03-24 | 2000-04-20 | Patent Treuhand Ges Fuer Elektrische Gluehlampen Mbh | High pressure gas discharge lamp has nickel and/or zircon used as solder material for solder connections between current wires at ends of discharge envelope and electrical supply leads |
JP2003045337A (en) * | 2001-07-31 | 2003-02-14 | Fujitsu Ltd | Display tube and display device |
JP2005294096A (en) * | 2004-04-01 | 2005-10-20 | Matsushita Electric Ind Co Ltd | Stroboscope apparatus |
SG182869A1 (en) * | 2011-01-18 | 2012-08-30 | Xenon Technologies Pte Ltd | Flash lamp with electrode pin pre-joined to disc |
Family Cites Families (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB435527A (en) * | 1933-12-19 | 1935-09-23 | British Thomson Houston Co Ltd | Improvements in and relating to electric lamps or the like |
US2624023A (en) * | 1949-10-19 | 1952-12-30 | Gen Electric | Lamp unit |
US3534213A (en) * | 1967-02-09 | 1970-10-13 | Vitro Corp Of America | Short arc lamp with ignition means and envelope sealing means |
US3693007A (en) * | 1970-05-25 | 1972-09-19 | Egyesuelt Izzolampa | Oxide cathode for an electric discharge device |
GB1463056A (en) * | 1973-01-19 | 1977-02-02 | Thorn Lighting Ltd | Electric discharge lamp |
US3906273A (en) * | 1974-01-16 | 1975-09-16 | Bendix Corp | Two electrode spark gap apparatus |
NL7901630A (en) * | 1978-09-18 | 1980-03-20 | Philips Nv | ELECTRIC LAMP. |
DE3329270A1 (en) * | 1983-08-12 | 1985-02-28 | Heimann Gmbh, 6200 Wiesbaden | Gas discharge lamp, in particular flash tube |
DE3506296A1 (en) * | 1985-02-22 | 1986-08-28 | Heimann Gmbh, 6200 Wiesbaden | GAS DISCHARGE LAMP |
DE3530921A1 (en) * | 1985-08-29 | 1987-03-12 | Heimann Gmbh | GAS DISCHARGE LAMP AND METHOD FOR THEIR PRODUCTION |
-
1987
- 1987-01-23 DE DE8701119U patent/DE8701119U1/en not_active Expired
-
1988
- 1988-01-11 DE DE8888100260T patent/DE3860570D1/en not_active Expired - Fee Related
- 1988-01-11 EP EP88100260A patent/EP0277488B1/en not_active Expired - Lifetime
- 1988-01-20 JP JP1988006644U patent/JPH054682Y2/ja not_active Expired - Lifetime
-
1990
- 1990-05-07 US US07/518,245 patent/US4987341A/en not_active Expired - Fee Related
-
1992
- 1992-05-21 HK HK368/92A patent/HK36892A/en unknown
Also Published As
Publication number | Publication date |
---|---|
US4987341A (en) | 1991-01-22 |
HK36892A (en) | 1992-05-29 |
DE3860570D1 (en) | 1990-10-18 |
JPS63128663U (en) | 1988-08-23 |
EP0277488A1 (en) | 1988-08-10 |
DE8701119U1 (en) | 1988-05-19 |
JPH054682Y2 (en) | 1993-02-05 |
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