EP0136564A2 - Endenversiegelung für keramische Bogenentladungslampen - Google Patents

Endenversiegelung für keramische Bogenentladungslampen Download PDF

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Publication number
EP0136564A2
EP0136564A2 EP84110403A EP84110403A EP0136564A2 EP 0136564 A2 EP0136564 A2 EP 0136564A2 EP 84110403 A EP84110403 A EP 84110403A EP 84110403 A EP84110403 A EP 84110403A EP 0136564 A2 EP0136564 A2 EP 0136564A2
Authority
EP
European Patent Office
Prior art keywords
diameter
inside diameter
ceramic arc
arc tube
chamfer
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Withdrawn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
EP84110403A
Other languages
English (en)
French (fr)
Other versions
EP0136564A3 (de
Inventor
Francis B. Makar, Jr.
George J. Fryburg
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 Sylvania Inc
Original Assignee
GTE Products Corp
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 GTE Products Corp filed Critical GTE Products Corp
Publication of EP0136564A2 publication Critical patent/EP0136564A2/de
Publication of EP0136564A3 publication Critical patent/EP0136564A3/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Withdrawn legal-status Critical Current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
    • H01J61/361—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
    • H01J61/36—Seals between parts of vessels; Seals for leading-in conductors; Leading-in conductors
    • H01J61/361—Seals between parts of vessel

Definitions

  • This invention relates to ceramic arc discharge tubes, such as of alumina or yttria; and more particularly to end seals thereof.
  • Certain arc discharge devices such as high pressure sodium lamps, employ ceramic discharge tubes.
  • These tubes generally comprise an elongated, tubular body of, for example, polycrystalline alumina, which have electrodes sealed into the ends thereof.
  • the electrodes are mounted in disks of the same material as the arc tube.
  • the disks have an outside diameter sized to fit within the inside diameter of the body with enough clearance to allow for the presence of a sealing material such as a high temperature frit.
  • the positioning of the electrode along the longitudinal axis of the device is usually . accomplished by means of a wire stop which is secured to the electrode.
  • a similar wire stop is used to position the disk and hold it in the proper position with the body for sealing. There are many problems with this type of seal.
  • the disk itself can cock during the sealing operation which provides a poor seal and an off-center electrode.
  • Two wire stops are used to support the disk and the electrode. Further, even though extremely tight tolerances are maintained on the arc tube inside diameter and the disk outside diameter, there is no convenient way to center the disk in order to provide the proper seal annulus. This annulus is critical for seal integrity.
  • Yet another object of the invention is the provision of an arc tube seal that is self-centering.
  • an hermetically sealed arc tube which has an elongated, substantially cyclindrical body having an outside diameter and at least one inside diameter and having opposed ends.
  • the at least one inside diameter widens to a diameter greater than the inside diameter and less than the outside diameter adjacent each of the opposed ends to form a chamfer.
  • a sealing disk including at least a frusto-conical portion formed to mate with the chamfer is sealed into each end.
  • This invention provides a seal that is self-centering and self-positioning. One of the wire stops is eliminated and the disk will not cock during sealing. Further. the proper seal annulus is maintained.
  • FIG. 1 a ceramic arc tube 10 comprising a body 12 which is elongated, substantially cyclindrical and tubular.
  • Body 12 has an outside diameter 14 and an inside diameter 16.
  • a sealing disk 26, which includes a frusto-conical portion 28 formed to mate with chamfer 24 is sealed into each end of body 12 by means of a sealing material 30 which forms a sealing annulus.
  • An electrode 32 which can be a conventional electrode for a high pressure sodium lamp, is sealed into a centrally located aperture in disk 26.
  • a wire stop 34 can hold electrode 32 in position during sealing.
  • the sealing disk 36 is provided with a circumferential rim or flange 38 which seals additionally to the outermost planes 40 and 42 of ends 18 and 20, respectively.
  • the body 12 has an insert 44 sealed into each end, and the inserts 44 are provided with chamfers 46.
  • body 12 in FIG. 3 has a first inside diameter 16 for a substantial portion of its length and a second inside diameter 48 which is less than the diameter 16.
  • the widest point of chamfers 46 is at diameter 50. which is also less than diameter 16 although greater than diameter 48.
  • the sealing disks 52 have a frusto-conical portion 54 for mating with chamfers 46 and also have the circumferential flange 56.

Landscapes

  • Vessels And Coating Films For Discharge Lamps (AREA)
  • Electrical Discharge Machining, Electrochemical Machining, And Combined Machining (AREA)
EP84110403A 1983-09-02 1984-08-31 Endenversiegelung für keramische Bogenentladungslampen Withdrawn EP0136564A3 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US52871683A 1983-09-02 1983-09-02
US528716 1983-09-02

Publications (2)

Publication Number Publication Date
EP0136564A2 true EP0136564A2 (de) 1985-04-10
EP0136564A3 EP0136564A3 (de) 1986-01-08

Family

ID=24106852

Family Applications (1)

Application Number Title Priority Date Filing Date
EP84110403A Withdrawn EP0136564A3 (de) 1983-09-02 1984-08-31 Endenversiegelung für keramische Bogenentladungslampen

Country Status (3)

Country Link
EP (1) EP0136564A3 (de)
JP (1) JPS6059352U (de)
CA (1) CA1246654A (de)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0204303A2 (de) * 1985-06-03 1986-12-10 GTE Products Corporation Konische Stromzuführung für Hochtemperaturen für keramische Entladungslampen
EP0401403A1 (de) * 1989-06-06 1990-12-12 Heimann Optoelectronics GmbH Blitzlampe
US6685331B1 (en) * 1999-11-12 2004-02-03 Edward T. Rockwell Chemiluminescent device

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1755147B1 (de) * 2004-06-08 2011-04-20 NGK Insulators, Ltd. Lichtemittierender behälter und lichtemittierender behälter für eine hochdruck-entladungslampe

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1041461A (en) * 1963-02-19 1966-09-07 Ass Elect Ind Improvements in or relating to metallic-vapour discharge lamps
DE2734099A1 (de) * 1977-07-28 1979-02-08 Heimann Gmbh Gasentladungslampe, insbesondere blitzroehre
EP0060582A1 (de) * 1981-03-11 1982-09-22 Koninklijke Philips Electronics N.V. Zusammengesetzter Körper

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5019894U (de) * 1973-06-25 1975-03-06
JPS5280675A (en) * 1975-12-26 1977-07-06 Toshiba Corp Metal vapor discharge lamp

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1041461A (en) * 1963-02-19 1966-09-07 Ass Elect Ind Improvements in or relating to metallic-vapour discharge lamps
DE2734099A1 (de) * 1977-07-28 1979-02-08 Heimann Gmbh Gasentladungslampe, insbesondere blitzroehre
EP0060582A1 (de) * 1981-03-11 1982-09-22 Koninklijke Philips Electronics N.V. Zusammengesetzter Körper

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0204303A2 (de) * 1985-06-03 1986-12-10 GTE Products Corporation Konische Stromzuführung für Hochtemperaturen für keramische Entladungslampen
EP0204303A3 (de) * 1985-06-03 1988-11-02 GTE Products Corporation Konische Stromzuführung für Hochtemperaturen für keramische Entladungslampen
EP0401403A1 (de) * 1989-06-06 1990-12-12 Heimann Optoelectronics GmbH Blitzlampe
US5091674A (en) * 1989-06-06 1992-02-25 Siemens Aktiengesellschaft Gas discharge lamp with glass tube and seal members
US6685331B1 (en) * 1999-11-12 2004-02-03 Edward T. Rockwell Chemiluminescent device

Also Published As

Publication number Publication date
JPS6059352U (ja) 1985-04-25
EP0136564A3 (de) 1986-01-08
CA1246654A (en) 1988-12-13

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Legal Events

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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

Designated state(s): BE DE FR GB NL

PUAL Search report despatched

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AK Designated contracting states

Designated state(s): BE DE FR GB NL

17P Request for examination filed

Effective date: 19860708

17Q First examination report despatched

Effective date: 19870918

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN

18D Application deemed to be withdrawn

Effective date: 19890223

RIN1 Information on inventor provided before grant (corrected)

Inventor name: FRYBURG, GEORGE J.

Inventor name: MAKAR, FRANCIS B., JR.