EP0469408A2 - Lampe à décharge à haute pression - Google Patents

Lampe à décharge à haute pression Download PDF

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Publication number
EP0469408A2
EP0469408A2 EP91112114A EP91112114A EP0469408A2 EP 0469408 A2 EP0469408 A2 EP 0469408A2 EP 91112114 A EP91112114 A EP 91112114A EP 91112114 A EP91112114 A EP 91112114A EP 0469408 A2 EP0469408 A2 EP 0469408A2
Authority
EP
European Patent Office
Prior art keywords
section
pressure discharge
pinch
discharge lamp
sealing
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Withdrawn
Application number
EP91112114A
Other languages
German (de)
English (en)
Other versions
EP0469408A3 (en
Inventor
Clemens Barthelmes
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 EP0469408A2 publication Critical patent/EP0469408A2/fr
Publication of EP0469408A3 publication Critical patent/EP0469408A3/de
Withdrawn legal-status Critical Current

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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
    • H01J61/366—Seals for leading-in conductors
    • H01J61/368—Pinched seals or analogous seals

Definitions

  • the invention relates to a high-pressure discharge lamp according to the preamble of claim 1.
  • the metal halides particularly if the fill contains sodium, can lead to corrosion of the sealing foils.
  • the foil is destroyed by the corrosion and the discharge vessel leaks, which leads to a lamp failure.
  • the corrosion of the sealing foils is caused by a thermal diffusion of the metal halide compounds from the discharge space into the pinched area.
  • corrosion can additionally be generated by a further effect.
  • the object of the invention is to provide a metal halide high-pressure discharge lamp in which the above-mentioned second effect for corrosion by an electrolytic current flow between the sealing films can also be largely prevented.
  • the electrolytic current flow between the foils is largely interrupted when the lamp is in operation. This prevents the sealing foils from being destroyed due to corrosion caused by the electrolytic current flow.
  • this section between the sealing foils must be at least 0.05 mm wide.
  • the section must not exceed a width that is at least 0.2 mm smaller than the distance between the two sealing films. Otherwise there may be leaks in the area of the foils.
  • Optimal results are achieved if the section begins at the outer end of the pinch and extends at least to the end of the sealing film on the electrode side. Under no circumstances should the section without or with a quartz glass with a maximum thickness of 0.3 mm come closer than 0.5 mm to the end of the pinch on the electrode side, otherwise the discharge space is no longer adequately sealed.
  • the section can be created in different ways. If the stability of the discharge vessel or the pinch allows a section without quartz glass, then a slot in the pinch corresponding to the required geometry of this section is advantageously produced after completion of the discharge vessel by means of a cutting disc or a laser. If, on the other hand, the thickness in this section is to be kept to a maximum of 0.3 mm, this section is advantageously produced by means of a corresponding crimping jaw geometry during the crimping process.
  • the discharge vessel 1 shows a side view of a discharge vessel squeezed on one side of a high-pressure discharge lamp according to the invention.
  • the discharge vessel 1 made of quartz glass has two electrodes made of tungsten, each electrode consisting of a straight shaft 2, 3 and a coiled electrode head 4, 5 and made of a piece of wire.
  • the two electrode heads 4, 5 face each other.
  • the free ends of the electrode shafts 2, 3 are welded to the one ends of a respective molybdenum sealing film 6, 7.
  • Power supply wires 8, 9 - also made of tungsten - are welded to the other ends of the sealing foils 6, 7.
  • the two electrode shafts 2, 3, the molybdenum sealing foils 6, 7 and the power supply wires 8, 9 are aligned essentially parallel to one another.
  • the discharge vessel 1 is closed by a pinch 10 into which the ends of the two electrode shafts 2, 3, the sealing foils 6, 7 and the ends of the current-carrying wires 8, 9 are squeezed.
  • the pinch 10 In the middle between the molybdenum sealing foils 6, 7, the pinch 10 has a section 11 without quartz glass with rectangular dimensions. This section 11 begins at the outer end of the pinch and runs with its longitudinal sides parallel to the power supply lines 8, 9 and sealing foils 6, 7.
  • the table below shows the dimensions for the squeeze, the molybdenum sealing foils and an optimal size of the section without quartz glass for the discharge tubes of a 35 W, a 70 W and a 150 W metal halide high-pressure discharge lamp:
  • FIG. 2 shows a plan view from below of a discharge vessel of a further high-pressure discharge lamp according to the invention, which is squeezed on one side.
  • the discharge vessel 12 is closed with a pinch 13 with an I-shaped cross section, into which the molybdenum sealing foils 14, 15 and the tungsten current leads 16, 17 of the two electrodes are squeezed.
  • a rectangular section 18 is provided in the middle of the pinch 13 between the two sealing foils 14, 15 and the power supply lines 16, 17. in which the pinch has a thickness of 0.3 mm or less.

Landscapes

  • Vessels And Coating Films For Discharge Lamps (AREA)
EP19910112114 1990-08-02 1991-07-19 High-pressure discharge lamp Withdrawn EP0469408A3 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4024603A DE4024603A1 (de) 1990-08-02 1990-08-02 Hochdruckentladungslampe
DE4024603 1990-08-02

Publications (2)

Publication Number Publication Date
EP0469408A2 true EP0469408A2 (fr) 1992-02-05
EP0469408A3 EP0469408A3 (en) 1992-03-11

Family

ID=6411547

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19910112114 Withdrawn EP0469408A3 (en) 1990-08-02 1991-07-19 High-pressure discharge lamp

Country Status (4)

Country Link
US (1) US5144192A (fr)
EP (1) EP0469408A3 (fr)
JP (1) JPH04233155A (fr)
DE (1) DE4024603A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0639854A1 (fr) * 1993-08-18 1995-02-22 Koninklijke Philips Electronics N.V. Lampe électrique
US5422535A (en) * 1992-10-12 1995-06-06 U.S. Philips Corporation Capped electric lamp

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6020682A (en) * 1996-01-10 2000-02-01 Holzer; Walter Fluorescent lamp with replaceable lamp part
US20100133972A1 (en) * 2008-12-02 2010-06-03 Ceferino Garcia Connector

Family Cites Families (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1050907B (fr) * 1959-02-19
DE821079C (de) * 1949-07-01 1951-11-15 Lumalampan Ab Folieneinschmelzung fuer elektrische Lampen in Quarz
US3025426A (en) * 1960-02-18 1962-03-13 Westinghouse Electric Corp Press seal
US3351802A (en) * 1964-06-12 1967-11-07 Sylvania Electric Prod Single ended, quartz type incandescent lamp
FR1399451A (fr) * 1964-06-25 1965-05-14 Lampes Sa Lampe électrique et son procédé de fabrication
FR1520151A (fr) * 1967-04-21 1968-04-05 Patent Treuhand Ges Fuer Elektrische Gluehlampen Mbh Appareil électrique avec récipient en verre fermé, comportant au moins un pied extérieur
NL7306208A (fr) * 1973-05-04 1974-11-06
DE3112821A1 (de) * 1981-03-31 1982-10-14 Patent-Treuhand-Gesellschaft für elektrische Glühlampen mbH, 8000 München Elektrische lampe mit einer als quetschung ausgebildeten gefaesseinschmelzung sowie vorrichtung und verfahren zur herstellung
DE3271115D1 (en) * 1981-03-31 1986-06-19 Patent Treuhand Ges Fuer Elektrische Gluehlampen Mbh Method for manufacturing a pinched seal for an electric lamp envelope and pinching device for carrying out the method
CA1176687A (fr) * 1981-06-06 1984-10-23 Robert Hall Culot a deux broches pour lampe a decharge monoculot
GB2100404B (en) * 1981-06-12 1985-02-13 Emi Plc Thorn Discharge lamps-combined lamp and socket
JPS5871554A (ja) * 1981-07-22 1983-04-28 ザ・ゼネラル・エレクトリツク・カンパニ−・ピ−・エル・シ− 放電ランプ
GB2103872A (en) * 1981-07-22 1983-02-23 Gen Electric Co Plc Electric discharge lamp seals
US4612000A (en) * 1983-06-09 1986-09-16 Gte Products Corporation Single-ended metal halide discharge lamps and process of manufacture
DE3537879A1 (de) * 1985-10-24 1987-04-30 Patent Treuhand Ges Fuer Elektrische Gluehlampen Mbh Verfahren zur herstellung einer einseitig gequetschten metallhalogenidhochdruckentladungslampe und eine nach diesem verfahren hergestellte lampe
US4723092A (en) * 1985-10-24 1988-02-02 Patent-Treuhand-Gesellschaft Fur Elektrische Gluhlampen Mbh Method of making a single-ended metal halide high-pressure discharge lamp, and single-ended lamp made according to the method
DE8805183U1 (de) * 1988-04-19 1988-07-14 Patent-Treuhand-Gesellschaft für elektrische Glühlampen mbH, 8000 München Hochdruckentladungslampe
US4979082A (en) * 1989-06-02 1990-12-18 Gte Products Corporation Relieved plastic lamp base

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5422535A (en) * 1992-10-12 1995-06-06 U.S. Philips Corporation Capped electric lamp
EP0639854A1 (fr) * 1993-08-18 1995-02-22 Koninklijke Philips Electronics N.V. Lampe électrique

Also Published As

Publication number Publication date
EP0469408A3 (en) 1992-03-11
DE4024603A1 (de) 1992-02-06
JPH04233155A (ja) 1992-08-21
US5144192A (en) 1992-09-01

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