EP0122052B1 - Verfahren zur Herstellung einer Bogenentladungsröhre - Google Patents

Verfahren zur Herstellung einer Bogenentladungsröhre Download PDF

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Publication number
EP0122052B1
EP0122052B1 EP19840301615 EP84301615A EP0122052B1 EP 0122052 B1 EP0122052 B1 EP 0122052B1 EP 19840301615 EP19840301615 EP 19840301615 EP 84301615 A EP84301615 A EP 84301615A EP 0122052 B1 EP0122052 B1 EP 0122052B1
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EP
European Patent Office
Prior art keywords
envelope
tubular
sodium
arc tube
electrode
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
Application number
EP19840301615
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English (en)
French (fr)
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EP0122052A1 (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
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Filing date
Publication date
Application filed by GTE Products Corp filed Critical GTE Products Corp
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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.
  • 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 springlike members 21 are affixed to the support member 15 and formed for contact with the glass envelope 5. Moreoever, 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 washer 49 is telescoped over the electrode portion 47 and placed in contact with the outwardly extending fins 45. Then, a ring of glass frit material in the form of an apertured glass frit wafer 51 is telescoped over the electrode portion 47 and into contact with the apertured ceramic washer 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 apertured end 37 of the envelope 35, apertured glass frit wafer 51, apertured ceramic washer 49 and electrode member 41 in an amount sufficient to melt the glass frit wafer 51 and 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. Therein, a sodium-mercury amalgam is introduced into the envelope 35 by way of the opposite or unsealed end of the envelope 35.
  • 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 washer 61 telescoped over the electrode portion 59 and into contact with the outwardly extending fins 57.
  • a ring of glass frit material in the form of an apertured glass frit wafer 63 is also telescoped over the electrode portion 59 and contacts the apertured ceramic washer 61.
  • the electrode portion 59 of the second electrode member 53 is placed in the other end of the ceramic tube 35 with the glass frit wafer 63 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 envelope prior to being introduced therein at a given desired pressure.
  • flushing may be achieved in a manner well-known to one skilled in the art, for example as described at pages 94 and 95 of 'Incandescent lamps' by Wilfrid G. Mathe- son, published 1977 by GTE Sylvania, Danvers, Massachusetts.
  • the second electrode member 53 is frit sealed into the opposite end of the ceramic envelope 35 in a similar manner to the first electrode member 41 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.

Claims (7)

1. Verfahren zur Herstellung einer Bogenröhre einer Hochdruck-Natriumlampe, bestehend aus den folgenden Schritten:
Einsiegeln einer ersten Elektrode (41) in ein Ende einer rohrförmigen Hülle (35);
Deponieren einer abgemessenen Menge von Quecksilber und Natrium innerhalb der rohrförmigen Hülle;
Spülen der rohrförmigen Hülle (35) mit einem Edelgas;
Füllen der gespülten rohrförmigen Hülle mit diesem Edelgas; und
Einsiegeln einer zweiten Elektrode (53) in ein gegenüberliegendes Ende der rohrförmigen Hülle;
dadurch gekennzeichnet, daß das Quecksilber und das Natrium in Form eines Amalgams aus Natrium und Quecksilber in einer Menge in die rohrförmige Hülle (35) eingebracht wird, die lediglich so groß ist, daß eine Lampe vom einen ungesättigten Dampfdruck aufweisenden Typ erzeugt wird, und daß ein sauerstoffabsorbierendes Getter zusammen mit dem Amalgam aus Natrium und Quecksilber ebenfalls in die rohrförmige Hülle eingebracht wird, wodurch das Getter Sauerstoffverunreinigungen absorbiert, um einen Verlust an Natrium während des Lampenbetriebs zu verhindern.
2. Verfahren zur Herstellung einer Bogenröhre nach Anspruch 1, dadurch gekennzeichnet, daß das Einsiegeln der ersten und zweiten Elektroden (41, 53) in die Enden der rohrförmigen Hülle (35) die folgenden Schritte umfaßt:
Aufschieben und Abstützen eines mit einer Öffnung versehenen Keramikelements (49, 61) auf ein bzw. an einem Elektrodenelement (41, 53);
Aufschieben eines Rings aus Glasmasse (51, 63) bzw. Fritte auf das Elektrodenelement (41, 53), so daß es zur Anlage an dem Keramikelement (49, 61) kommt;
Anordnen der Elektrode (41, 53) innerhalb der rohrförmigen Hülle (35) und des Rings aus Glasmasse (51, 63) in Anlage an dem Ende (37, 39) der rohrförmigen Hülle (35), und
Aufbringen von Wärme auf den Ring aus Glasmasse (51, 63) in einer Menge, die ausreicht, um den Ring aus Glasmasse (51, 63) zu schmelzen und das Keramikelement (49, 61) an dem Elektrodenelement (41, 53) und der Hülle (35) anzusiegeln.
3. Verfahren zur Herstellung einer Bogenröhre nach Anspruch 1, dadurch gekennzeichnet, daß die rohrförmige Hülle (35) in Form einer Hülle aus polykristallinem Aluminiumoxid vorliegt.
4. Verfahren zur Herstellung einer Bogenröhre nach Anspruch 1, dadurch gekennzeichnet, daß das sauerstoffabsorbierende Getter in Form eines Metalls oder einer Metallegierung vorliegt.
5. Verfahren zur Herstellung einer Bogenröhre nach Anspruch 1, dadurch gekennzeichnet, daß die rohrförmige Bogenröhre (35), die eine in ein Ende derselben eingesiegelte rohrförmige Elektrode (41) aufweist, in eine Glove-Box gebracht wird, in der eine inerte Atmosphäre herrscht, bevor die genannte Dosis in ihr deponiert wird.
6. Verfahren zur Herstellung einer Bogenröhre einer Hochdruck-Natriumlampe, bei welcher die Bogenröhre (35) innerhalb einer evakuierten Glashülle (5) abgestützt und mit einem Basiselement (7) verbunden ist, das aus den folgenden Schritten besteht:
Einsiegeln einer Elektrode (41) in ein Ende einer rohrförmigen keramischen Hülle (35) mittels Glasmasse;
Verbringen der Hülle in eine inerte Atmosphäre;
Einführen einer abgemessenen Menge bzw. Dosis aus Quecksilber und Natrium in die rohrförmige keramische Hülle (35);
Einführen eines Edelgases in die rohrförmige keramische Hülle (35); und
Einsiegeln einer Elektrode (53) in das andere Ende der rohrförmigen keramischen Hülle (35) mittels Glasmasse, dadurch gekennzeichnet, daß das Quecksilber und das Natrium in Form eines Amalgams aus Natrium und Quecksilber in einer Menge in die rohrförmige Hülle (35) eingebracht wird, die lediglich so groß ist, daß eine Lampe vom einen ungesättigten Dampfdruck aufweisenden Typ erzeugt wird, und daß ein sauerstoffabsorbierendes Getter ebenfalls in die rohrförmige Hülle eingebracht wird, und zwar zusammen mit dem Amalgam aus Natrium und Quecksilber, wobei das Getter Sauerstoffverunreinigungen absorbiert, um einen Natriumverlust während des Betriebs der Lampe zu verhindern.
7. Verfahren zur Herstellung einer Bogenröhre nach Anspruch 6, dadurch gekennzeichnet, daß das sauerstoffabsorbierende Getter eine Metallegierung aufweist, die aus der Gruppe aus Metallen bestehend aus Aluminium, Titan, Scandium, Hafnium, Cerium, Lanthan, Thorium, Yttrium und Zirkonium gebildet ist.
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)

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

Family

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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

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

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4037721C2 (de) * 1990-11-27 2003-02-13 Patent Treuhand Ges Fuer Elektrische Gluehlampen Mbh Verfahren zur Herstellung einer Natriumhochdrucklampe sowie dafür geeignete Vorrichtung

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4755721A (en) * 1987-03-16 1988-07-05 Iwasaki Electric Co., Ltd. High pressure sodium vapor lamp having unsaturated vapor pressure type characteristics
JP2928813B2 (ja) * 1988-02-10 1999-08-03 コーニンクレッカ フィリップス エレクトロニクス エヌ ヴィ 不飽和高圧ナトリウムランプ

Family Cites Families (9)

* 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.
HU164737B (de) * 1972-06-23 1974-04-11
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
US4075530A (en) * 1976-04-21 1978-02-21 Japan Storage Battery Company Limited High pressure sodium vapor lamp of unsaturated vapor pressure type
US4366410A (en) * 1980-11-21 1982-12-28 Gte Laboratories Incorporated Vacuum-tight assembly particularly for a discharge tube

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4037721C2 (de) * 1990-11-27 2003-02-13 Patent Treuhand Ges Fuer Elektrische Gluehlampen Mbh Verfahren zur Herstellung einer Natriumhochdrucklampe sowie dafür geeignete Vorrichtung

Also Published As

Publication number Publication date
EP0122052A1 (de) 1984-10-17
AU2547284A (en) 1984-09-13
JPS59169037A (ja) 1984-09-22
DE3469638D1 (en) 1988-04-07
AU578601B2 (en) 1988-11-03
CA1246136A (en) 1988-12-06

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