EP0884763B1 - Molybdänfolieneinschmelzung in Glas und elektrische Lampe mit einer derartigen Molybdänfolieneinschmelzung - Google Patents
Molybdänfolieneinschmelzung in Glas und elektrische Lampe mit einer derartigen Molybdänfolieneinschmelzung Download PDFInfo
- Publication number
- EP0884763B1 EP0884763B1 EP98109117A EP98109117A EP0884763B1 EP 0884763 B1 EP0884763 B1 EP 0884763B1 EP 98109117 A EP98109117 A EP 98109117A EP 98109117 A EP98109117 A EP 98109117A EP 0884763 B1 EP0884763 B1 EP 0884763B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- molybdenum foil
- molybdenum
- foil
- glass
- side edges
- 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
- H01J5/00—Details relating to vessels or to leading-in conductors common to two or more basic types of discharge tubes or lamps
- H01J5/32—Seals for leading-in conductors
- H01J5/38—Pinched-stem or analogous seals
-
- 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
- H01J9/32—Sealing leading-in conductors
- H01J9/323—Sealing leading-in conductors into a discharge lamp or a gas-filled discharge device
- H01J9/326—Sealing leading-in conductors into a discharge lamp or a gas-filled discharge device making pinched-stem or analogous seals
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J61/00—Gas-discharge or vapour-discharge lamps
- H01J61/02—Details
- H01J61/36—Seals between parts of vessels; Seals for leading-in conductors; Leading-in conductors
- H01J61/366—Seals for leading-in conductors
- H01J61/368—Pinched seals or analogous seals
-
- 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
- H01J9/36—Joining connectors to internal electrode system
Definitions
- the invention relates to a molybdenum foil melting in glass and an electric lamp with such a molybdenum foil sealing according to the preambles of claims 1 and 4.
- Molybdenum foil melts in glass are used for gastight electrical feedthroughs in quartz glass Lamp vessels of high pressure discharge lamps and Halogen bulbs needed. Quartz glass is used here to refer to glasses whose silicon dioxide content is at least 95 percent by weight is. Because the quartz glass of the lamp vessel is much smaller thermal expansion coefficient than that from the lamp vessel outstanding, usually made of molybdenum wire Power supplies used to supply the inside of the lamp vessel arranged illuminant serve with electrical energy, because it is not possible to have the power supply wires directly, that is, without auxiliary measures, in the quartz glass of the lamp vessel melt down gastight. When the lamp vessel is heated, for example, during lamp operation the power supply wires made of molybdenum are about ten times as strong expand like the surrounding quartz glass.
- the resulting mechanical stresses would cause cracks in the quartz glass to lead.
- sufficient Ductility can, however, despite the different thermal Expansion coefficients of quartz glass and molybdenum and the resulting mechanical stresses are gastight electrical current feedthrough for lamp vessels manufactured become.
- the opposite Ends of the molybdenum foil usually each with a power supply wire welded from molybdenum and this so created The unit is then in the lamp vessel end to be closed positioned that one of the power supply wires into the interior of the lamp vessel protrudes while the other power supply wire protrudes from the lamp vessel.
- the quartz glass the lamp vessel end is then melted and the lamp vessel end is, for example, by means of crimping jaws from the Molybdenum foil and the existing power supply unit tightly squeezed.
- the molybdenum foil is then in the quartz glass of the lamp vessel end fully embedded.
- In the area of the molybdenum foil is the one consisting of the power supply lines and the molybdenum foil
- the lead-through is sealed gas-tight in the end of the lamp vessel.
- the molybdenum foil melts therefore fulfill two different things Functions. First, they are used to produce one electrically conductive connection between the inside of the lamp vessel arranged bulbs with those from the lamp vessel outstanding power supplies and secondly ensure a gas-tight closure of the lamp vessel.
- the molybdenum foils are usually cut off from a supply tape. You own hence a rectangular area defined by two side edges and two cut edges running perpendicular to the side edges is limited.
- the surfaces of the molybdenum foils are common convex, which means that the thickness of the molybdenum foils increases from the middle of the film to the side edges.
- molybdenum foil melts in glass known to avoid cracking in glass, molybdenum foils with Have sandblasted treatment of roughened surface.
- the German patent DE 29 47 230 describes molybdenum foil melts for sealing lamp vessels that consist of at least 95% quartz glass. To reduce cracking in the glass, the molybdenum foils are with a Add yttrium oxide from 0.25 to 1 percent by weight.
- British Patent GB 1,594,976 discloses a molybdenum foil seal in glass, in which the molybdenum foil has two opposite ends and has two side edges running perpendicular to it.
- the molybdenum foil is convex arched, that is, the film thickness starts from the center of the film in the direction the side edges steadily.
- One end of the molybdenum foil is wedge-shaped, to remove stresses in the meltdown. The wedge shape is by means of an etching process.
- the danger a crack formation in the glass in the area of the molybdenum foil ends delimited by cut edges can be reduced.
- an electric lamp with an improved sealing of the lamp vessels in the To provide area of electrical feedthroughs can be reduced.
- a wedge-shaped end of the melted molybdenum foil through a rolled cutting edge limited.
- burrs can be found in the Cut off the molybdenum foil from the supply tape at the cut edge, be made to disappear again, so that these originate from cutting No burrs or cracks in the area surrounding the molybdenum foil Can cause glass.
- the wedge shape of the molybdenum foil end delimited by a cut edge can be produced by rolling this molybdenum foil end. Rolling will cut any burrs on the cutting edge of the molybdenum foil smoothed.
- the at least one molybdenum foil of the molybdenum foil melt according to the invention is through two cut edges and two across the cut edges running side edges limited and has parallel to the cut edges a lanceolate cross-section. This gives it a convex surface, which reduces the mechanical stresses in the molybdenum foil sealing.
- the molybdenum foil melt according to the invention can advantageously be for gas-tight sealing of electrical feedthroughs for lamp vessels use electric lamps.
- FIG. 1 shows a pinch seal 1 for an existing quartz glass Lamp vessel 2 of an electric lamp with an electric one Power feedthrough, the molybdenum foil melting according to the invention having.
- the electrical current feedthrough exists from a power supply wire protruding from the lamp vessel 3, from a gas-tight in the quartz glass of the pinch seal 1 melted molybdenum foil 4 and from one into the interior 5 of the lamp vessel 2 protruding electrode rod 6.
- the power supply wire 3 and the electrode rod 6 are made also made of molybdenum and are both welded to the molybdenum foil 4.
- the molybdenum foil 4 has a rectangular surface, the Edge of two opposite cutting edges 4b and of two in the longitudinal direction A-A, perpendicular to the cutting edges 4b extending side edges 4a is formed.
- the cut edges 4b arise when the molybdenum foil 4 is cut off from a supply belt.
- the surface of the molybdenum foil 4 is convex, that means that their thickness starts from the center of the film to the two Side edges 4a steadily decrease, so that the molybdenum foil 4th parallel to the cutting edges 4b a lancet-shaped cross section has (Fig. 4).
- the ends 4c delimited by cut edges 4b Molybdenum foil 4 are tapered in a wedge shape.
- a rectangular is used to produce the molybdenum foil melt Piece of molybdenum foil 4 from one arranged on a supply roll Molybdenum tape cut off.
- This molybdenum tape is already there convex, that is, its thickness increases from from the middle of the band to its side edges. This points the molybdenum foil 4 also has the convex curvature. Burrs to the To eliminate cut edges 4b of the molybdenum foil 4, the foil ends 4c tapered in a wedge shape by rolling. The ends of the molybdenum foil 4 outside the wedge-shaped areas 4c with the power supply wire 3 or welded to the electrode rod 6, the likewise both consist of molybdenum.
- the resulting assembly 3, 4, 6 is then in the lamp vessel end to be sealed gas-tight introduced.
- the quartz glass 1 in the area of the lamp vessel end softened by heating and, for example pressed onto the molybdenum foil 4 by means of crimping jaws. After this Cooling of the quartz glass 1 forms that from the power supply wire 3, the electrode rod 6 and the molybdenum foils 4 existing Unit an electrical feedthrough for the lamp vessel 2, in the area of the molybdenum foil 4 gas-tight in the lamp vessel end has melted down.
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Vessels And Coating Films For Discharge Lamps (AREA)
- Glass Compositions (AREA)
- Common Detailed Techniques For Electron Tubes Or Discharge Tubes (AREA)
Description
- Figur 1
- eine Draufsicht auf eine Stromdurchführung eines Lampengefäßes mit einer erfindungsgemäßen Molybdänfolieneinschmelzung in schematischer Darstellung
- Figur 2
- eine Seitenansicht der Stromdurchführung des Lampengefäßes aus Figur 1 in schematischer Darstellung
- Figur 3
- einen Querschnitt durch die Stromdurchführung aus Figur 1 entlang der Längsachse A-A und senkrecht zur Folienebene in schematischer Darstellung
- Figur 4
- einen Querschnitt durch die Stromdurchführung aus Figur 1 entlang der Schnittlinie B-B und senkrecht zur Folienebene in schematischer Darstellung
Claims (3)
- Molybdänfolieneinschmelzung in Glas, wobei die Molybdänfolieneinschmelzung folgende Merkmale aufweist,mindestens eine Molybdänfolie (4), die zwei einander gegenüberliegende Enden (4c) und zwei senkrecht zu den Enden verlaufende Seitenkanten (4a) besitzt, wobei die Dicke der Molybdänfolie (4) ausgehend von einem Maximalwert in der Folienmitte zu den beiden Seitenkanten (4a) stetig abnimmt, so dass die Molybdänfolie (4) eine konvexe Wölbung aufweist, und mindestens ein Ende (4c) der Molybdänfolie (4) keilförmig ausgebildet ist,einen Glaskörper (1), dessen Glas zu mindestens 95 Gewichtsprozent aus Siliziumdioxid besteht, und in dem die mindestens eine Molybdänfolie (4) gasdicht eingeschmolzen ist,einen oder mehrere metallische Stäbe (6) oder Drähte (3), die mit der mindestens einen Molybdänfolie (4) verbunden sind,
- Elektrische Lampe mit einem oder mehreren Lampengefäßen aus Glas, einem in einem Lampengefäß eingeschlossenem Leuchtmittel und elektrischen Stromdurchführungen, gekennzeichnet durch eine oder mehrere Molybdänfolieneinschmelzungen gemäß Anspruch 1.
- Verfahren zur Herstellung einer Molybdänfolieneinschmelzung in Glas, das zu mindestens 95 Gewichtsprozent aus Siliziumdioxid besteht, wobei zum Einschmelzen eine konvex gewölbte Molybdänfolie (4) bereitgestellt wird, die zwei einander gegenüberliegende Enden (4c) und zwei senkrecht zu den Enden verlaufende Seitenkanten (4a) besitzt und deren Dicke ausgehend von einem Maximalwert in der Polienmitte zu den beiden Seitenkanten (4a) stetig abnimmt, und mindestens ein Ende (4c) der Molybdänfolie (4) keilförmig ausgebildet ist, dadurch gekennzeichnet, dass die Keilform des mindestens einen Endes (4c) durch Abschneiden der Molybdänfolie (4) von einem Molybdänband und anschließendes Walzen der das mindestens eine Ende (4c) begrenzenden Schnittkante (4b) hergestellt wird.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19724544A DE19724544A1 (de) | 1997-06-11 | 1997-06-11 | Molybdänfolieneinschmelzung in Glas und elektrische Lampe mit einer derartigen Molybdänfolieneinschmelzung |
DE19724544 | 1997-06-11 |
Publications (3)
Publication Number | Publication Date |
---|---|
EP0884763A2 EP0884763A2 (de) | 1998-12-16 |
EP0884763A3 EP0884763A3 (de) | 1999-03-17 |
EP0884763B1 true EP0884763B1 (de) | 2003-07-23 |
Family
ID=7832101
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP98109117A Expired - Lifetime EP0884763B1 (de) | 1997-06-11 | 1998-05-19 | Molybdänfolieneinschmelzung in Glas und elektrische Lampe mit einer derartigen Molybdänfolieneinschmelzung |
Country Status (8)
Country | Link |
---|---|
EP (1) | EP0884763B1 (de) |
JP (1) | JPH117918A (de) |
KR (1) | KR100541506B1 (de) |
CA (1) | CA2240230A1 (de) |
DE (2) | DE19724544A1 (de) |
ES (1) | ES2205318T3 (de) |
HU (1) | HU221393B1 (de) |
TW (1) | TW423025B (de) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6940217B2 (en) | 2001-12-04 | 2005-09-06 | Ushiodenki Kabushiki Kaisha | Short arc ultra-high pressure discharge lamp |
Families Citing this family (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4826402A (en) * | 1986-03-28 | 1989-05-02 | Nachtrieb Paul W | High-capacity centrifugal pump |
JP3664972B2 (ja) * | 2000-12-05 | 2005-06-29 | 株式会社小糸製作所 | アークチューブ |
EP1548788B1 (de) | 2003-12-22 | 2009-02-11 | Patent-Treuhand-Gesellschaft für elektrische Glühlampen mbH | Elektrodensystem für eine Entladungslampe, Entladungslampe mit einem derartigen Elektrodensystem und Verfahren zur Herstellung eines derartigen Elektrodensystems |
JP4320760B2 (ja) | 2004-03-10 | 2009-08-26 | スタンレー電気株式会社 | 放電灯 |
DE102007020067B4 (de) | 2007-04-27 | 2013-07-18 | Osram Gmbh | Verfahren zur Herstellung einer Molybdänfolie für den Lampenbau und Molybdänfolie sowie Lampe mit Molybdänfolie |
DE102007055171A1 (de) | 2007-11-19 | 2009-05-20 | Osram Gesellschaft mit beschränkter Haftung | Verfahren zur Herstellung einer Molybdänfolie für eine elektrische Lampe und Molybdänfolie sowie elektrische Lampe mit Molybdänfolie |
WO2009106133A1 (de) * | 2008-02-27 | 2009-09-03 | Osram Gesellschaft mit beschränkter Haftung | Einschmelzfolie, verfahren zu deren herstellung und lampe mit einer derartigen folie |
JP2011049136A (ja) * | 2009-07-29 | 2011-03-10 | Panasonic Corp | 高圧放電ランプ用金属箔の製造方法、高圧放電ランプ及び表示装置 |
TW201341126A (zh) | 2012-04-13 | 2013-10-16 | New Way Tools Co Ltd | 可更小角度轉動之棘輪扳手 |
TW201412467A (zh) * | 2012-09-20 | 2014-04-01 | New Way Tools Co Ltd | 易裝配之棘輪扳手 |
TW201527052A (zh) | 2014-01-15 | 2015-07-16 | New Way Tools Co Ltd | 易裝配之棘輪扳手 |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB1594976A (en) * | 1978-05-24 | 1981-08-05 | Gen Electric Co Ltd | High pressure electric discharge lamps |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CH258444A (de) * | 1949-03-05 | 1948-11-30 | Mineral S A | Gasentladungslampe. |
BE517821A (de) * | 1952-02-23 | |||
US2966607A (en) * | 1959-05-26 | 1960-12-27 | Duro Test Corp | High pressure short arc lamps and method of making same |
US4587454A (en) * | 1984-05-17 | 1986-05-06 | Gte Products Corporation | Incandescent lamp with improved press seal |
KR100247669B1 (ko) * | 1992-07-14 | 2000-03-15 | 요트.게.아. 롤페즈 | 전기 램프 |
-
1997
- 1997-06-11 DE DE19724544A patent/DE19724544A1/de not_active Withdrawn
-
1998
- 1998-05-14 TW TW087107453A patent/TW423025B/zh not_active IP Right Cessation
- 1998-05-19 EP EP98109117A patent/EP0884763B1/de not_active Expired - Lifetime
- 1998-05-19 DE DE59809061T patent/DE59809061D1/de not_active Expired - Lifetime
- 1998-05-19 ES ES98109117T patent/ES2205318T3/es not_active Expired - Lifetime
- 1998-06-10 HU HU9801316A patent/HU221393B1/hu unknown
- 1998-06-10 JP JP17959398A patent/JPH117918A/ja active Pending
- 1998-06-10 CA CA002240230A patent/CA2240230A1/en not_active Abandoned
- 1998-06-11 KR KR1019980021633A patent/KR100541506B1/ko not_active IP Right Cessation
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB1594976A (en) * | 1978-05-24 | 1981-08-05 | Gen Electric Co Ltd | High pressure electric discharge lamps |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6940217B2 (en) | 2001-12-04 | 2005-09-06 | Ushiodenki Kabushiki Kaisha | Short arc ultra-high pressure discharge lamp |
Also Published As
Publication number | Publication date |
---|---|
HUP9801316A2 (hu) | 1999-01-28 |
CA2240230A1 (en) | 1998-12-11 |
HU9801316D0 (en) | 1998-08-28 |
HU221393B1 (en) | 2002-09-28 |
HUP9801316A3 (en) | 2001-02-28 |
JPH117918A (ja) | 1999-01-12 |
DE19724544A1 (de) | 1998-12-17 |
DE59809061D1 (de) | 2003-08-28 |
EP0884763A2 (de) | 1998-12-16 |
ES2205318T3 (es) | 2004-05-01 |
EP0884763A3 (de) | 1999-03-17 |
KR19990006871A (ko) | 1999-01-25 |
KR100541506B1 (ko) | 2006-02-28 |
TW423025B (en) | 2001-02-21 |
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