EP0122050A1 - Procédé de fabrication de l'ampoule de décharge d'une lampe à vapeur non saturée de sodium à haute pression - Google Patents

Procédé de fabrication de l'ampoule de décharge d'une lampe à vapeur non saturée de sodium à haute pression Download PDF

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Publication number
EP0122050A1
EP0122050A1 EP84301611A EP84301611A EP0122050A1 EP 0122050 A1 EP0122050 A1 EP 0122050A1 EP 84301611 A EP84301611 A EP 84301611A EP 84301611 A EP84301611 A EP 84301611A EP 0122050 A1 EP0122050 A1 EP 0122050A1
Authority
EP
European Patent Office
Prior art keywords
getter
arc tube
oxygen
absorbing
envelope
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
EP84301611A
Other languages
German (de)
English (en)
Other versions
EP0122050B1 (fr
Inventor
Philip J. White
Robert S. White
John A. Scholz
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 EP0122050A1 publication Critical patent/EP0122050A1/fr
Application granted granted Critical
Publication of EP0122050B1 publication Critical patent/EP0122050B1/fr
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
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J61/00—Gas-discharge or vapour-discharge lamps
    • H01J61/02—Details
    • H01J61/24—Means for obtaining or maintaining the desired pressure within the vessel
    • H01J61/26—Means for absorbing or adsorbing gas, e.g. by gettering; Means for preventing blackening of the envelope

Definitions

  • This invention relates to high pressure sodium lamps of the unsaturated vapor type and more particularly to a process for fabricating arc tubes for unsaturated vapor high pressure sodium lamps.
  • the best known configuration includes a tubular ceramic arc tube disposed within an evacuated glass envelope.
  • the arc tube is filled or dosed with a rare gas and an excessive amount of sodium and mercury.
  • the arc tube has a saturated sodium fill because of the well known tendency whereby large amounts of sodium are lost during operation of the lamp.
  • saturated type high pressure sodium lamps leave much to be desired due to the undesired variations in color rendition and operational voltages which are encountered.
  • the so-called unsaturated vapor type high pressure sodium lamp was developed.
  • the construction is somewhat similar to the saturated type lamp except that the dosage of sodium, in particular, is greatly reduced.
  • it was found that such a reduction in sodium content was possible so long as provision was made for absorbing the excess oxygen which undesirably accompanied th: fill or rare gas which was dispensed into the arc tube.
  • One of the techniques for effecting this absorption of undesired oxygen within the arc tube is to enclose an oxygen-absorbing getter therein along with the usual dosage of sodium, mercury and a rare. gas.
  • One such structure is set forth and described in a concurrently filed application bearing Attorney's Docket No. 24,340, Serial Ho. , assigned to the Assignee of the present application.
  • a getter material is located within the arc tube and in contact with the gases therein.
  • any undesired oxygen within the arc tube occurring during the sodium or mercury vaporization process or accompanying the admitted rare gas is absorbed by the getter material and compound reformation is inhibited.
  • An object of the present invention is to provide an improved unsaturated vapor type high pressure sodium lamp. Another object of the invention is to enhance an unsaturated vapor high pressure sodium lamp by improving the arc tube therein. Still another object of the invention is to provide an improved process for fabricating an arc tube employed in an unsaturated vapor type high pressure sodium lamp. A further object of the invention is to provide a process for fabricating an arc tube for an unsaturated vapor type high pressure sodium lamp wherein undesired envelope discoloration is inhibited.
  • a process for fabricating arc tubes for unsaturated vapor type high pressure sodium lamps wherein an oxygen-absorbing getter is affixed to one of a pair of electrodes, a tubular ceramic envelope is dosed with mercury, sodium and a rare gas and the electrodes are each sealed into an end of the tubular ceramic envelope with the getter therein and spaced from the 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.
  • the getter 37 is preferably in the form of a support member or substrate 49 whereon an oxygen-absorbing metal alloy 51 is affixed as by sintering.
  • the substrate 49 is of a material such as nickel plated iron and the sintered getter material is an alloy of metals selected from the group consisting of zirconium, aluminum, titanium, scandium, cerium, lanthanum, thorium or yttrium.
  • the sintered getter material is an alloy of metals selected from the group consisting of zirconium, aluminum, titanium, scandium, cerium, lanthanum, thorium or yttrium.
  • other rare earth oxides are suitable gettering materials for attachment to the substrate 49.
  • an oxygen-absorbing gettering material or metal alloy 51 is sintered to a substrate 49 which is preferably in the form of a slitted apertured disc or getter 37.
  • This getter is peferably formed for attachment to the shank portion 43 of the electrode member 39 such as by slipping the slitted apertured disc 37 onto the shank portion 43.
  • one of the electrodes 31 is sealed into one end of the ceramic envelope of the arc tube 27.
  • a dosing of sodium, mercury and a rare gas is deposited within the ceramic envelope of the arc tube 27.
  • This dosing includes sodium and mercury in an amount which will become totally vaporized to provide a desired unsaturated vapor type high pressure sodium lamp.
  • a sodium-mercury amalgam which will decompose within the arc tube 27, is deposited therein, and a rare gas is admitted into one end of the arc tube 27.
  • the other electrode, 29 of FIG. 1, having the oxygen-absorbing getter 37 affixed thereto is sealed into the other end of the arc tube 27.
  • this sealing of the electrodes 29 and 31 into the opposite ends of the tubular ceramic envelope of the arc tube 27 is preferably, not necessarily, effected by a frit sealing technique.
  • a ceramic wafer, 41 of FIG. 2 is affixed to the electrode 39 and a glass frit material, not shown but preferably in the form of a wafer with a central hole, is utilized to effect the desired frit sealing of the electrodes 29 and 31 into the ends of the arc tube 27 in a manner such that the cathode portion 45 and the getter 37 are within the arc tube 27.
  • the, arc tube fabrication process is readily effected by sealing an electrode into one end of a tubular ceramic envelope of the arc tube. Then a dose of sodium, mercury and rare gas is deposited into the envelope in an amount sufficient for vaporization and provision of an unsaturated vapor type high pressure sodium lamp. Thereafter the other end of the tubular ceramic envelope is sealed with an electrode to which is affixed an oxygen gettering material to provide the desired arc tube.
  • a process has been provided for fabricating an arc tube for an unsaturated vapor type high pressure sodium lamp.
  • one technique for affixing the getter within and spaced from the envelope has been provided, it is obvious that other methods of attachment could be used.
  • the getter could be welded to the cathode shank or dispensed or affixed to the cathode portion 45 of the electrode. In any event, the getter is spaced from the ceramic envelope of the arc tube.

Landscapes

  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Discharge Lamp (AREA)
  • Vessels And Coating Films For Discharge Lamps (AREA)
  • Manufacture Of Electron Tubes, Discharge Lamp Vessels, Lead-In Wires, And The Like (AREA)
EP84301611A 1983-03-10 1984-03-09 Procédé de fabrication de l'ampoule de décharge d'une lampe à vapeur non saturée de sodium à haute pression Expired EP0122050B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US47389483A 1983-03-10 1983-03-10
US473894 1983-03-10

Publications (2)

Publication Number Publication Date
EP0122050A1 true EP0122050A1 (fr) 1984-10-17
EP0122050B1 EP0122050B1 (fr) 1988-12-28

Family

ID=23881459

Family Applications (1)

Application Number Title Priority Date Filing Date
EP84301611A Expired EP0122050B1 (fr) 1983-03-10 1984-03-09 Procédé de fabrication de l'ampoule de décharge d'une lampe à vapeur non saturée de sodium à haute pression

Country Status (5)

Country Link
EP (1) EP0122050B1 (fr)
JP (1) JPS59169036A (fr)
AU (1) AU570434B2 (fr)
CA (1) CA1241365A (fr)
DE (1) DE3475854D1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0262815A1 (fr) * 1986-09-27 1988-04-06 THORN EMI plc Getter d'hydrogène et procédé de fabrication
WO2007053441A3 (fr) * 2005-10-28 2008-03-27 Hewlett Packard Development Co Getter monte sur electrode

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3821585A (en) * 1973-04-30 1974-06-28 Westinghouse Electric Corp Tungsten halogen incandescent lamp with group iva metal getter and method of manufacture
DE2131887B2 (fr) * 1970-06-24 1974-09-19 Shing Cheung Kowloon Hong Kong Chow (Grossbritannien)
DE2704323A1 (de) * 1977-02-02 1978-08-03 Shigeru Suga Xenonlampe
DE2848891A1 (de) * 1978-11-10 1980-05-14 Heimann Gmbh Blitzlichtroehre

Family Cites Families (8)

* 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
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
NL154865B (nl) * 1967-03-31 1977-10-17 Philips Nv Elektrische gasontladingslamp met een omhulling van dichtgesinterd aluminiumoxyde en werkwijze voor het vervaardigen van een dergelijke gasontladingslamp.
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
US4075530A (en) * 1976-04-21 1978-02-21 Japan Storage Battery Company Limited High pressure sodium vapor lamp of unsaturated vapor pressure type
JPS53101874A (en) * 1977-02-18 1978-09-05 Hitachi Ltd High pressure sodium lamp
CA1214196A (fr) * 1983-02-14 1986-11-18 Jack M. Strok Tubes couleur a vapeur de sodium haute pression avec desoxygeneur

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2131887B2 (fr) * 1970-06-24 1974-09-19 Shing Cheung Kowloon Hong Kong Chow (Grossbritannien)
US3821585A (en) * 1973-04-30 1974-06-28 Westinghouse Electric Corp Tungsten halogen incandescent lamp with group iva metal getter and method of manufacture
DE2704323A1 (de) * 1977-02-02 1978-08-03 Shigeru Suga Xenonlampe
DE2848891A1 (de) * 1978-11-10 1980-05-14 Heimann Gmbh Blitzlichtroehre

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0262815A1 (fr) * 1986-09-27 1988-04-06 THORN EMI plc Getter d'hydrogène et procédé de fabrication
WO2007053441A3 (fr) * 2005-10-28 2008-03-27 Hewlett Packard Development Co Getter monte sur electrode

Also Published As

Publication number Publication date
DE3475854D1 (en) 1989-02-02
AU2547184A (en) 1984-09-13
CA1241365A (fr) 1988-08-30
AU570434B2 (en) 1988-03-17
EP0122050B1 (fr) 1988-12-28
JPH0452582B2 (fr) 1992-08-24
JPS59169036A (ja) 1984-09-22

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