EP0219861B1 - Verfahren zur Herstellung einer einseitig gequetschten Metallhalogenidhochdruckentladungslampe und eine nach diesem Verfahren hergestellte Lampe - Google Patents

Verfahren zur Herstellung einer einseitig gequetschten Metallhalogenidhochdruckentladungslampe und eine nach diesem Verfahren hergestellte Lampe Download PDF

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Publication number
EP0219861B1
EP0219861B1 EP86114649A EP86114649A EP0219861B1 EP 0219861 B1 EP0219861 B1 EP 0219861B1 EP 86114649 A EP86114649 A EP 86114649A EP 86114649 A EP86114649 A EP 86114649A EP 0219861 B1 EP0219861 B1 EP 0219861B1
Authority
EP
European Patent Office
Prior art keywords
circular
pinch
tube
current supply
cylindrical tube
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
Application number
EP86114649A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0219861A2 (de
EP0219861A3 (en
Inventor
Alexander Dobrusskin
Jürgen Dr. vom Scheidt
Jürgen Dr. Heider
Ewald Dr. Wurster
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
Priority claimed from DE19853537879 external-priority patent/DE3537879A1/de
Priority claimed from DE19853537880 external-priority patent/DE3537880A1/de
Application filed by Patent Treuhand Gesellschaft fuer Elektrische Gluehlampen mbH filed Critical Patent Treuhand Gesellschaft fuer Elektrische Gluehlampen mbH
Publication of EP0219861A2 publication Critical patent/EP0219861A2/de
Publication of EP0219861A3 publication Critical patent/EP0219861A3/de
Application granted granted Critical
Publication of EP0219861B1 publication Critical patent/EP0219861B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • 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

Definitions

  • sealing foils made of molybdenum are used instead of wire-shaped current leadthroughs in halogen incandescent and metal halide high-pressure discharge lamps.
  • their geometric size and thus also the size of the pinch in which the sealing foils are embedded also decrease. It is often difficult to maintain the required spacing of the sealing films, some of which are relatively wide and arranged in one plane, within the narrow pinch.
  • metal halide high-pressure discharge lamps there is also the need that a high voltage of at least 6 kV s must be applied to ignite the lamp, depending on the cooling state of the lamp.
  • GB-PS 1 442 497 therefore proposed a sheathing of the power supply led out at an angle from the pinch by means of quartz tubes which are filled with a filling material and sealed with an elastomer.
  • quartz tubes which are filled with a filling material and sealed with an elastomer.
  • this involves a high additional manufacturing effort, which makes the lamp more expensive.
  • quartz tubes which have long been led out of the pinch, are extremely vulnerable to breakage, which greatly reduces electrical safety.
  • the lamp is intended for use in an optical system. So that the filament can have a certain reference distance from the base end, the external power supplies are e.g. led out from the side of the pinch, whereby the length of the pinch can be changed later and adapted to the optical system.
  • the present invention has for its object to design the pinch of the lamps so that on the one hand the necessary width of the sealing film can be used and on the other hand the ignition high voltage required to ignite the lamp of at least 6 kV s can be applied in particular to discharge lamps.
  • the lead-out of the external power supply lines from the pinch is to be made simpler in order to enable more cost-effective production.
  • a pump tube 2 is already molded onto the circular-cylindrical tube 1 in FIG.
  • Both the circular cylindrical tube 1 and the pump tube 2 are made of quartz glass.
  • two expansion mandrels 3 running parallel to one another are introduced.
  • the expansion mandrels 3 are held in such a way that they can carry out a stroke A along the longitudinal axis of the circular-cylindrical tube 1 as well as an expansion B transversely to the same.
  • the quartz glass is heated to its softening point. The state of the spread B is shown in FIG. 2.
  • part of the circular-cylindrical tube is spread such that this region assumes an elongated, round cross-sectional shape with a cylindrical shape 4, the greater width of which is larger than the original circular-cylindrical diameter (see also FIG. 3).
  • the expansion can be carried out as a single operation on a separate machine or on the rotary machine, in which the subsequent crushing process he follows.
  • the remaining part of the circular-cylindrical tube 1 facing the pump tube 2 forms the future discharge vessel and maintains its original circular shape during the expansion of the expansion mandrels 3.
  • FIG. 5 An embodiment of a finished lamp 5, which was produced by the previously described method, is shown in FIG.
  • prefabricated electrode systems are introduced into the circular cylindrical tube 1. These consist of the outer current leads 6 made of tungsten, the sealing foils 7 made of molybdenum and the inner current leads 8 made of tungsten with the hook-shaped electrodes 9, also made of tungsten.
  • the sealing foils 7 are arranged in the expanded part 4, running parallel to one another. All of these operations are conventional.
  • the pump tube 2 (FIGS. 1 and 2) is melted off, so that only one pump tip 12 remains.
  • a pump tube 2 is already molded onto the circular-cylindrical tube 1 in FIG.
  • Both the circular cylindrical tube 1 and the pump tube 2 are made of quartz glass.
  • two expansion mandrels 14 are inserted at an acute angle to each other.
  • the expansion mandrels 14 are held in such a way that they can carry out a stroke A along the longitudinal axis of the circular-cylindrical tube 1 as well as an expansion B transversely to the same.
  • the quartz glass is heated to its softening point. The state of the spread B is shown in FIG. 6.
  • part of the circular-cylindrical tube is spread in such a way that this region assumes an elongated, round cross-sectional shape 15, the greater width of which is greater than the original circular-cylindrical diameter (see also FIG. 7).
  • the spreading can be carried out as a single operation on a separate machine or on the rotary machine, in which the subsequent squeezing process takes place.
  • the remaining part of the circular-cylindrical tube 1 facing the pump tube 2 forms the future discharge vessel 11 and maintains its original circular shape during the expansion of the expansion mandrels 14.
  • FIG. 16 An embodiment of a finished lamp 16, which was produced by the previously described method, is shown in FIG.
  • prefabricated electrode systems are introduced into the circular cylindrical tube 1. These consist of the outer current leads 17 made of tungsten, the sealing foils 18 made of molybdenum and the inner current leads 8 made of tungsten with the hook-shaped electrodes 9, also made of tungsten.
  • the sealing foils 18 are arranged in the expanded part 15 at an acute angle to one another. All of these operations are conventional.
  • the pump tube 2 (FIGS. 5 and 6) is melted off, so that only one pump tip 12 remains.
  • the finished lamp 21 of FIG. 9 has an extended creepage distance at the pinch 22, as a result of which the ignition voltage which can be applied - for example for lamps which are difficult to ignite - can be increased even further. All other part names of this embodiment correspond to the previously described embodiments.
  • the distance between the outer current leads 6, 17, which are led out in parallel from the end faces 13, 20, of a metal halide high-pressure discharge lamp 5, 16, 21 produced by the method according to the invention is approximately 20 mm.
  • the lamp 5, 16, 21 has a nominal power of approx. 35 W and can be ignited with a high ignition voltage of more than 6 kV s .

Landscapes

  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Vessels And Coating Films For Discharge Lamps (AREA)
  • Manufacture Of Electron Tubes, Discharge Lamp Vessels, Lead-In Wires, And The Like (AREA)
EP86114649A 1985-10-24 1986-10-22 Verfahren zur Herstellung einer einseitig gequetschten Metallhalogenidhochdruckentladungslampe und eine nach diesem Verfahren hergestellte Lampe Expired - Lifetime EP0219861B1 (de)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
DE19853537879 DE3537879A1 (de) 1985-10-24 1985-10-24 Verfahren zur herstellung einer einseitig gequetschten metallhalogenidhochdruckentladungslampe und eine nach diesem verfahren hergestellte lampe
DE19853537880 DE3537880A1 (de) 1985-10-24 1985-10-24 Verfahren zur herstellung einer einseitig gequetschten metallhalogenidhochdruckentladungslampe und eine nach diesem verfahren hergestellte lampe
DE3537880 1985-10-24
DE3537879 1985-10-24

Publications (3)

Publication Number Publication Date
EP0219861A2 EP0219861A2 (de) 1987-04-29
EP0219861A3 EP0219861A3 (en) 1989-05-03
EP0219861B1 true EP0219861B1 (de) 1991-09-18

Family

ID=25837262

Family Applications (1)

Application Number Title Priority Date Filing Date
EP86114649A Expired - Lifetime EP0219861B1 (de) 1985-10-24 1986-10-22 Verfahren zur Herstellung einer einseitig gequetschten Metallhalogenidhochdruckentladungslampe und eine nach diesem Verfahren hergestellte Lampe

Country Status (4)

Country Link
US (1) US4723092A (ja)
EP (1) EP0219861B1 (ja)
JP (1) JPH0656737B2 (ja)
DE (1) DE3681549D1 (ja)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB8913798D0 (en) * 1989-06-15 1989-08-02 Emi Plc Thorn Arc tube for a high pressure discharge lamp
DE4024603A1 (de) * 1990-08-02 1992-02-06 Patent Treuhand Ges Fuer Elektrische Gluehlampen Mbh Hochdruckentladungslampe
DE4233469A1 (de) * 1992-10-05 1994-04-07 Patent Treuhand Ges Fuer Elektrische Gluehlampen Mbh Verfahren zur Herstellung einer einseitig gequetschten Hochdruckentladungslampe kleiner Leistung und Hochdruckentladungslampen
US6685525B1 (en) * 1999-06-23 2004-02-03 Matsushita Electric Industrial Co., Ltd. Method for manufacturing an incandescent lamp
US20050211370A1 (en) * 2005-06-20 2005-09-29 Osram Sylvania Inc. Ceramic discharge vessel with joined capillaries
DE102005056956A1 (de) * 2005-11-29 2007-05-31 Patent-Treuhand-Gesellschaft für elektrische Glühlampen mbH Elektrische Lampe mit einem Kolben mit mindestens einer Quetschung

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL6806902A (ja) * 1968-05-16 1969-11-18
GB1174745A (en) * 1968-07-01 1969-12-17 British Lighting Ind Ltd Improvements in Seals for Electrical Devices
GB1442497A (en) * 1974-03-01 1976-07-14 Thorn Electrical Ind Ltd Discharge lamps
CA1176687A (en) * 1981-06-06 1984-10-23 Robert Hall Bi pin base for single ended discharge lamp
US4512488A (en) * 1982-05-27 1985-04-23 The United States Of America As Represented By The Secretary Of The Army Sealing tubulation and method
US4668204A (en) * 1984-05-04 1987-05-26 Gte Products Corporation Single-ended high intensity discharge lamp and manufacture

Also Published As

Publication number Publication date
JPH0656737B2 (ja) 1994-07-27
JPS62100931A (ja) 1987-05-11
US4723092A (en) 1988-02-02
DE3681549D1 (de) 1991-10-24
EP0219861A2 (de) 1987-04-29
EP0219861A3 (en) 1989-05-03

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