EP0263379A1 - Flash lamp - Google Patents
Flash lamp Download PDFInfo
- Publication number
- EP0263379A1 EP0263379A1 EP87114059A EP87114059A EP0263379A1 EP 0263379 A1 EP0263379 A1 EP 0263379A1 EP 87114059 A EP87114059 A EP 87114059A EP 87114059 A EP87114059 A EP 87114059A EP 0263379 A1 EP0263379 A1 EP 0263379A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- tube
- electrodes
- flash lamp
- glass
- electrode
- 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.)
- Withdrawn
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Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J61/00—Gas-discharge or vapour-discharge lamps
- H01J61/02—Details
- H01J61/36—Seals between parts of vessels; Seals for leading-in conductors; Leading-in conductors
- H01J61/361—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
- H01J61/02—Details
- H01J61/30—Vessels; Containers
- H01J61/302—Vessels; Containers characterised by the material of the vessel
Definitions
- the invention relates to a flash lamp with a translucent tube in which two electrodes are located, which are tightly connected to the tube.
- Discharge flash lamps which have a tube made of tempered glass as the discharge vessel, the thermal expansion of which is matched to that of the electrodes used (tungsten, molybdenum) and enables automatic mass production.
- the invention has for its object to design a flash lamp so that it allows economical mass production with high resilience.
- the tube consists of aluminum oxide Al2O3.
- Al2O3 has a high resistance to the arc. Its thermal expansion, which matches niobium and certain electrode alloys, enables economical mass production.
- FIG. 1 to 3 one end of a flash lamp is shown, which has a tube 1 made of translucent Al2O3, with which two electrodes are tightly connected, of which the electrode 2 is shown.
- the electrode 2 is brazed with braze 3 to a cap 4, which covers the end of the tube 1.
- the tube 1 is metallized at its end and tightly connected to the cap 4 by a hard solder 5.
- the materials for the electrode 2, the cap 4 and the solders 3 and 5 are chosen so that their thermal expansion is approximately equal to the thermal expansion of Al2O3. As a material for the electrode 2 and the cap 4 comes z. B. Niobium in question.
- the electrode 2 is hermetically connected to the tube 1 by a glass plug 6, which is fused on the one hand to the electrode 2 and on the other hand to the tube 1.
- the material of the glass plug 6 must have exactly the same thermal expansion as that of Al2O3 and the material of the electrode 2, z. B. niobium.
- the example according to FIG. 3 again has a glass plug 7 which is fused directly to the electrode 2. Between the tube 1 and the glass plug 7, however, a glass solder 8 is provided, which enables easy connection. In this example too, all four components 1, 2, 7, 8 must match in their thermal expansion.
- Niobium was mentioned as the material for the metal parts, namely the electrodes and possibly the metal caps in the example according to FIG. 1.
- suitable metal alloys can also be used which, in their thermal expansion, match Al2O3 and, if appropriate, glass.
Abstract
Description
Die Erfindung betrifft eine Blitzlampe mit einem lichtdurchlässigen Rohr, in dem zwei Elektroden liegen, die mit dem Rohr dicht verbunden sind.The invention relates to a flash lamp with a translucent tube in which two electrodes are located, which are tightly connected to the tube.
Es sind Entladungs-Blitzlampen bekannt, die als Entladungsgefäß ein Rohr aus Hartglas aufweisen, das in seiner Wärmeausdehnung derjenigen der verwendeten Elektroden (Wolfram, Molybdän) angepaßt ist und eine automatische Massenfertigung ermöglicht.Discharge flash lamps are known which have a tube made of tempered glass as the discharge vessel, the thermal expansion of which is matched to that of the electrodes used (tungsten, molybdenum) and enables automatic mass production.
Es ist ferner bekannt, für Hochleistungs-Blitzlampen als Entladungsgefäß ein Rohr aus Quarzglas vorzusehen, das einerseits eine wesentlich höhere Belastbarkeit im Lichtbogen aufweist als Hartglas, andererseits jedoch durch seine extrem kleine Wärmeausdehnung bei der Einschmelzung der Elektroden Handarbeit erfordert.It is also known to provide a tube made of quartz glass as a discharge vessel for high-power flash lamps, which on the one hand has a significantly higher load capacity in the arc than hard glass, but on the other hand requires manual labor due to its extremely small thermal expansion when the electrodes are melted.
Der Erfindung liegt die Aufgabe zugrunde, eine Blitzlampe so auszubilden, daß sie bei hoher Belastbarkeit eine wirtschaftliche Massenfertigung erlaubt.The invention has for its object to design a flash lamp so that it allows economical mass production with high resilience.
Diese Aufgabe ist erfindungsgemäß dadurch gelöst, daß das Rohr aus Aluminiumoxid Al₂O₃ besteht. Al₂O₃ besitzt eine hohe Beständigkeit gegenüber dem Lichtbogen. Seine Wärmeausdehnung, die zu Niob und bestimmten Elektrodenlegierungen paßt, erlaubt eine wirtschaftliche Massenfertigung.This object is achieved in that the tube consists of aluminum oxide Al₂O₃. Al₂O₃ has a high resistance to the arc. Its thermal expansion, which matches niobium and certain electrode alloys, enables economical mass production.
Die Erfindung ist nachfolgend anhand dreier in den Figuren 1 bis 3 dargestellter Ausführungsbeispiele näher erläutert.The invention is explained in more detail below with reference to three exemplary embodiments shown in FIGS. 1 to 3.
In den Figuren 1 bis 3 ist jeweils das eine Ende einer Blitzlampe dargestellt, die ein Rohr 1 aus lichtdurchlässigem Al₂O₃ aufweist, mit dem zwei Elektroden dicht verbunden sind, von denen die Elektrode 2 dargestellt ist.In Figures 1 to 3, one end of a flash lamp is shown, which has a
Bei dem Beispiel gemäß Figur 1 ist die Elektrode 2 mit Hartlot 3 mit einer Kappe 4 verlötet, die das Ende des Rohres 1 umfaßt. Das Rohr 1 ist an seinem Ende metallisiert und mit der Kappe 4 durch ein Hartlot 5 dicht verbunden. Die Materialien für die Elektrode 2, die Kappe 4 sowie die Lote 3 und 5 sind so gewählt, daß ihre Wärmeausdehnung etwa gleich der Wärmeausdehnung von Al₂O₃ ist. Als Material für die Elektrode 2 und die Kappe 4 kommt z. B. Niob in Frage.In the example according to FIG. 1, the
Bei dem Beispiel gemäß Figur 2 ist die Elektrode 2 mit dem Rohr 1 durch einen Glaspfropfen 6 hermetisch verbunden, der einerseits mit der Elektrode 2 und andererseits mit dem Rohr 1 verschmolzen ist. Das Material des Glaspfropfens 6 muß dabei in seiner Wärmeausdehnung genau derjenigen von Al₂O₃ sowie dem Material der Elektrode 2, z. B. Niob, angepaßt sein.In the example according to FIG. 2, the
Das Beispiel gemäß Figur 3 weist wieder einen Glaspfropfen 7 auf, der direkt mit der Elektrode 2 verschmolzen ist. Zwischen dem Rohr 1 und dem Glaspfropfen 7 ist jedoch ein Glaslot 8 vorgesehen, das eine leichte Verbindung ermöglicht. Auch bei diesem Beispiel müssen alle vier Komponenten 1, 2, 7, 8 in ihrer Wärmeausdehnung übereinstimmen.The example according to FIG. 3 again has a glass plug 7 which is fused directly to the
Als Material für die Metallteile, nämlich die Elektroden und gegebenenfalls bei dem Beispiel gemäß Figur 1 die Metallkappen, wurde Niob genannt. Es sind jedoch auch geeignete Metallegierungen verwendbar, die in ihrer Wärmeausdehnung zu Al₂O₃ sowie gegebenenfalls zu Glas passen.Niobium was mentioned as the material for the metal parts, namely the electrodes and possibly the metal caps in the example according to FIG. 1. However, suitable metal alloys can also be used which, in their thermal expansion, match Al₂O₃ and, if appropriate, glass.
Claims (4)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE3634006 | 1986-10-06 | ||
DE3634006 | 1986-10-06 |
Publications (1)
Publication Number | Publication Date |
---|---|
EP0263379A1 true EP0263379A1 (en) | 1988-04-13 |
Family
ID=6311159
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP87114059A Withdrawn EP0263379A1 (en) | 1986-10-06 | 1987-09-25 | Flash lamp |
Country Status (2)
Country | Link |
---|---|
EP (1) | EP0263379A1 (en) |
JP (1) | JPS6360265U (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0392060A1 (en) * | 1989-04-14 | 1990-10-17 | Heimann Optoelectronics GmbH | Flash lamp |
EP0786797A3 (en) * | 1996-01-29 | 1997-11-12 | General Electric Company | Arctube for high pressure discharge lamp |
WO2001011653A1 (en) * | 1999-08-05 | 2001-02-15 | Patent-Treuhand-Gesellschaft für elektrische Glühlampen mbH | Gas discharge lamp and method for the production thereof |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP4548212B2 (en) * | 2005-05-17 | 2010-09-22 | ウシオ電機株式会社 | Flash discharge lamp |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4004173A (en) * | 1965-12-27 | 1977-01-18 | Sydney Alfred Richard Rigden | Niobium alumina sealing and product produced thereby |
US4147952A (en) * | 1974-12-12 | 1979-04-03 | Gte Sylvania Incorporated | Method of sealing alumina arc tube |
US4203050A (en) * | 1977-07-28 | 1980-05-13 | Heimann Gmbh | Gas discharge lamp and method |
-
1987
- 1987-09-25 EP EP87114059A patent/EP0263379A1/en not_active Withdrawn
- 1987-10-02 JP JP15212987U patent/JPS6360265U/ja active Pending
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4004173A (en) * | 1965-12-27 | 1977-01-18 | Sydney Alfred Richard Rigden | Niobium alumina sealing and product produced thereby |
US4147952A (en) * | 1974-12-12 | 1979-04-03 | Gte Sylvania Incorporated | Method of sealing alumina arc tube |
US4203050A (en) * | 1977-07-28 | 1980-05-13 | Heimann Gmbh | Gas discharge lamp and method |
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0392060A1 (en) * | 1989-04-14 | 1990-10-17 | Heimann Optoelectronics GmbH | Flash lamp |
US5091675A (en) * | 1989-04-14 | 1992-02-25 | Heimann Gmbh | Flashbulb having hard glass containing emitter substances |
EP0786797A3 (en) * | 1996-01-29 | 1997-11-12 | General Electric Company | Arctube for high pressure discharge lamp |
US5866982A (en) * | 1996-01-29 | 1999-02-02 | General Electric Company | Arctube for high pressure discharge lamp |
WO2001011653A1 (en) * | 1999-08-05 | 2001-02-15 | Patent-Treuhand-Gesellschaft für elektrische Glühlampen mbH | Gas discharge lamp and method for the production thereof |
US6605892B1 (en) | 1999-08-05 | 2003-08-12 | Patent-Treuhand-Gesellschaft Fuer Elektrische Gluehlampen Mbh | Gas discharge lamp and method for the production thereof |
Also Published As
Publication number | Publication date |
---|---|
JPS6360265U (en) | 1988-04-21 |
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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): CH DE FR GB IT LI NL |
|
17P | Request for examination filed |
Effective date: 19880506 |
|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: THE APPLICATION HAS BEEN WITHDRAWN |
|
18W | Application withdrawn |
Withdrawal date: 19880727 |
|
RIN1 | Information on inventor provided before grant (corrected) |
Inventor name: DUENISCH, INGO, DIPL.-PHYS. Inventor name: ACHTER, EUGEN |