EP0122052A1 - Verfahren zur Herstellung einer Bogenentladungsröhre - Google Patents

Verfahren zur Herstellung einer Bogenentladungsröhre Download PDF

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Publication number
EP0122052A1
EP0122052A1 EP84301615A EP84301615A EP0122052A1 EP 0122052 A1 EP0122052 A1 EP 0122052A1 EP 84301615 A EP84301615 A EP 84301615A EP 84301615 A EP84301615 A EP 84301615A EP 0122052 A1 EP0122052 A1 EP 0122052A1
Authority
EP
European Patent Office
Prior art keywords
envelope
arc tube
tubular
electrode
ceramic
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.)
Granted
Application number
EP84301615A
Other languages
English (en)
French (fr)
Other versions
EP0122052B1 (de
Inventor
Philip J. White
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 EP0122052A1 publication Critical patent/EP0122052A1/de
Application granted granted Critical
Publication of EP0122052B1 publication Critical patent/EP0122052B1/de
Expired legal-status Critical Current

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Classifications

    • 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
    • H01J9/38—Exhausting, degassing, filling, or cleaning vessels

Definitions

  • This invention relates to the manufacture of high pressure sodium lamps of the unsaturated vapor type and more particularly to a process for fabricating arc tubes for use in high pressure sodium lamps of the unsaturated vapor types.
  • An object of the present invention is to provide an improved high pressure sodium lamp manufacturing process. Another object of the invention is to enhance the fabrication of an arc tube for use in an unsaturated vapor high pressure sodium lamp. A further object of the invention is to reduce the complexity of fabricating an arc tube for an unsaturated high pressure sodium lamp.
  • an arc tube fabricating process wherein a first electrode is sealed into one end of a tubular ceramic envelope, a sodium-mercury amalgam and an oxygen-absorbing getter are disposed therein, the envelope is exhausted and then filled with a low pressure noble gas and a second electrode is sealed into the opposite end of the tubular ceramic envelope.
  • FIG. 1 illustrates an unsaturated vapor high pressure sodium lamp having a hermetically sealed and evacuated glass envelope 5 formed to fit into an ordinary screw-type base member 7.
  • a glass stem member 9 is sealed to the envelope 5 and projects therein. Electrical conductors, 11 and 13 respectively, are sealed into and pass through the stem member 9 to provide electrical connections from the interior to the exterior of the glass envelope 5.
  • An electrically conductive support member 15 is affixed to one of the electrical conductors 11 and has a pair of crossbars 17 and 19 affixed thereto at either end. Also, a plurality of spring-like members 21 are affixed to the support member 15 and formed for contact with the glass envelope 5. Moreover, a pair of getters 23 and 25 are attached to the support member 15 and serve to insure the integrity of the evacuated envelope 5.
  • This arc tube 27 Disposed within the glass envelope 5 and supported by the crossbars 17 and 19 is an arc tube 27.
  • One electrode 29 is affixed to and supported by the crossbar 17 while the other electrode 31 is insulatingly supported by the other crossbar 19, but electrically connected to the electrical conductor 13 passing through the stem member 9.
  • Heat conserving elements 33 may be wrapped about the arc tube 27 at each end thereof in the vicinity of the electrodes 29 and 31 in order to reduce the heat differential thereat from the center of the arc tube 27.
  • a ceramic envelope 35 of a material, such as a polycrystalline alumina for example, has an apertured end of reduced diameter 37 and 39 affixed to either end thereof.
  • a first electrode member 41 has a support portion 43 with outwardly extending fins 45 and an attached electrode portion 47.
  • An apertured ceramic wafer 49 is telescoped over the electrode portion 47 and placed in contact with the outwardly extending fins 45. Then, an apertured glass frit wafer 51 is telescoped over the electrode portion 47 and into contact with the apertured ceramic wafer 49. Thereafter, the electrode portion 47 of the first electrode member 41 is inserted into the ceramic envelope by way of the apertured end 37. Heat is applied to the one end of the envelope 35, apertured wafer 37, glass frit wafer 51, apertured ceramic wafer 49 and electrode member 41 in an amount suff.icient to hermetically seal the electrode member 41 into the ceramic envelope 35.
  • the ceramic envelope 35 having a hermetically sealed end portion is usually transferred to an inert atmosphere, such as a well-known inert atmosphere glove box.
  • an inert atmosphere such as a well-known inert atmosphere glove box.
  • a sodium-mercury amalgam is introduced into the envelope 35 by way of the opposite or unsealed end of the envelope 35.
  • the mercury may be in the form of a metal alloy or mercuric oxide decomposable to provide the desired mercury vapor.
  • an oxygen-absorbing getter is introduced into the ceramic envelope 35 by way of the opposite or unsealed end thereof.
  • the getter is a metal alloy which is preferably selected from the metal group consisting of aluminum, titanium, scandium, hafnium, cerium, lanthanum, thorium, yttrium and zirconium. Also, other rare earth or actinide metals are applicable so long as the oxygen-absorbing capabilities are present.
  • a second electrode member 53 having a support portion 55 with outwardly extending fins 57 and an attached electrode portion 59 has an apertured ceramic 61 telescoped over the electrode portion 59 and into contact with the outwardly extending fins 57.
  • An apertured frit wafer 63 is also telescoped over the electrode portion 59 and contacts the apertured ceramic 61.
  • the electrode , portion 59 of the second electrode member 53 is placed in the other end of the ceramic tube 35 with the frit wafer 61 in loose contact therewith.
  • a noble or rare gas such as xenon is introduced into the ceramic envelope 35 by way of the unsealed end whereat the second electrode member 53 is loosely located.
  • the noble or rare gas is employed to flush the ceramic prior to being introduced therein at a given desired pressure.
  • the second electrode member 53 is frit sealed into the opposite end of the ceramic envelope 35 to provide a desired arc tube 27.
  • the arc tube 27 is supported within an evacuated glass envelope, in a manner well known in the art to provide an unsaturated vapor high pressure sodium lamp.

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)
EP19840301615 1983-03-10 1984-03-09 Verfahren zur Herstellung einer Bogenentladungsröhre Expired EP0122052B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US47389683A 1983-03-10 1983-03-10
US473896 1983-03-10

Publications (2)

Publication Number Publication Date
EP0122052A1 true EP0122052A1 (de) 1984-10-17
EP0122052B1 EP0122052B1 (de) 1988-03-02

Family

ID=23881470

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19840301615 Expired EP0122052B1 (de) 1983-03-10 1984-03-09 Verfahren zur Herstellung einer Bogenentladungsröhre

Country Status (5)

Country Link
EP (1) EP0122052B1 (de)
JP (1) JPS59169037A (de)
AU (1) AU578601B2 (de)
CA (1) CA1246136A (de)
DE (1) DE3469638D1 (de)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4924146A (en) * 1988-02-10 1990-05-08 U.S. Philips Corporation Unsaturated high-pressure sodium lamp
US5192239A (en) * 1990-11-27 1993-03-09 Patent Treuhand Gesellschaft Fur Elektrische Gluhlampen M.B.H. Method and apparatus to make a discharge vessel for a sodium high-pressure discharge lamp

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0282657A1 (de) * 1987-03-16 1988-09-21 Iwasaki Electric Co., Ltd. Hochdrucknatriumdampflampe mit Charakteristiken eines Typs mit ungesättigtem Dampfdruck

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3384798A (en) * 1966-04-26 1968-05-21 Gen Electric High pressure saturation vapor sodium lamp containing mercury
US3726582A (en) * 1967-03-31 1973-04-10 Philips Corp Electric discharge lamp comprising container of densely sintered aluminum oxide
AT342148B (de) * 1972-06-23 1978-03-10 Egyesuelt Izzolampa Verfahren zum herstellen von saugrohrlosen entladungslampen
US4156550A (en) * 1976-04-21 1979-05-29 Japan Storage Battery Company Limited Process for fabricating high sodium vapor lamp
EP0052844A1 (de) * 1980-11-21 1982-06-02 GTE Laboratories Incorporated Vakuumdichte Anordnung

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3453477A (en) * 1967-02-16 1969-07-01 Gen Electric Alumina-ceramic sodium vapor lamp
GB1211176A (en) * 1967-02-16 1970-11-04 Gen Electric High-pressure sodium vapor lamp
JPS5818742B2 (ja) * 1974-09-09 1983-04-14 日本電池株式会社 高圧ナトリウムランプおよびその製造方法
JPS52107177A (en) * 1976-03-05 1977-09-08 Hitachi Ltd Producing method for discharge lamp of high vapor pressure

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3384798A (en) * 1966-04-26 1968-05-21 Gen Electric High pressure saturation vapor sodium lamp containing mercury
US3726582A (en) * 1967-03-31 1973-04-10 Philips Corp Electric discharge lamp comprising container of densely sintered aluminum oxide
AT342148B (de) * 1972-06-23 1978-03-10 Egyesuelt Izzolampa Verfahren zum herstellen von saugrohrlosen entladungslampen
US4156550A (en) * 1976-04-21 1979-05-29 Japan Storage Battery Company Limited Process for fabricating high sodium vapor lamp
EP0052844A1 (de) * 1980-11-21 1982-06-02 GTE Laboratories Incorporated Vakuumdichte Anordnung

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4924146A (en) * 1988-02-10 1990-05-08 U.S. Philips Corporation Unsaturated high-pressure sodium lamp
US5192239A (en) * 1990-11-27 1993-03-09 Patent Treuhand Gesellschaft Fur Elektrische Gluhlampen M.B.H. Method and apparatus to make a discharge vessel for a sodium high-pressure discharge lamp

Also Published As

Publication number Publication date
EP0122052B1 (de) 1988-03-02
AU578601B2 (en) 1988-11-03
DE3469638D1 (en) 1988-04-07
AU2547284A (en) 1984-09-13
JPS59169037A (ja) 1984-09-22
CA1246136A (en) 1988-12-06

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