EP0034113B1 - Lampe à décharge électrique - Google Patents

Lampe à décharge électrique Download PDF

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Publication number
EP0034113B1
EP0034113B1 EP81730009A EP81730009A EP0034113B1 EP 0034113 B1 EP0034113 B1 EP 0034113B1 EP 81730009 A EP81730009 A EP 81730009A EP 81730009 A EP81730009 A EP 81730009A EP 0034113 B1 EP0034113 B1 EP 0034113B1
Authority
EP
European Patent Office
Prior art keywords
ceramic
wires
discharge lamp
electric discharge
filaments
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
EP81730009A
Other languages
German (de)
English (en)
Other versions
EP0034113A1 (fr
Inventor
Béla Dr. Dipl.Ing. Kerekes
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.)
Egyesuelt Izzolampa es Villamossagi Rt
Original Assignee
Egyesuelt Izzolampa es Villamossagi Rt
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 Egyesuelt Izzolampa es Villamossagi Rt filed Critical Egyesuelt Izzolampa es Villamossagi Rt
Publication of EP0034113A1 publication Critical patent/EP0034113A1/fr
Application granted granted Critical
Publication of EP0034113B1 publication Critical patent/EP0034113B1/fr
Expired 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

Definitions

  • the invention relates to an electric discharge lamp with an elongate discharge vessel made of ceramic and electrodes arranged at both ends in the discharge vessel according to the preamble of patent claim 1.
  • Discharge lamps of this type are known from US Pat. Nos. 3,992,642 and 3,882,346, respectively.
  • the power supply to the electrodes consists of a niobium wire, which is passed through the respective ceramic plate, in a vacuum-tight manner.
  • Discharge lamps are also known in practice, in which the power supply consists of niobium tubes which are welded to niobium sealing caps which encompass the ends of the discharge vessel. In all of these cases, the conductor cross-section was determined by the specified line - i.e. H. of the current to be enforced - determined.
  • the sealing caps were made of the same metal as the power supply leads, the heating of the power supply leads did not pose any problems because the coefficients of thermal expansion were the same.
  • ceramic plates were used instead of the metal caps for the vacuum-tight sealing of the discharge vessel, the thermal stresses occurring due to the different coefficients of thermal expansion led to dilatation effects and ultimately to cracks in the area where the current conductors passed through the ceramic plates. With the formation of the power supply in the form of tubes - which have their own elasticity - the problems could not be reduced but not eliminated.
  • the invention is therefore based on the object of designing the electric discharge lamp of the type mentioned at the outset in such a way that, even with necessarily larger power line cross sections, no harmful thermal stresses occur between the power supply and the discharge vessel or the ceramic plates sealing the discharge vessel.
  • FIG. 1 shows a discharge lamp designed according to the invention as an example, which contains a ceramic discharge tube 3 in a glass bulb 4 provided with lamp base 7, filled or evacuated with inert gas, the two ends of which are closed by end elements 8 made of ceramic.
  • end elements 8 made of ceramic.
  • electrodes 11 at both ends, to which the current supply line is provided by current leads 9 consisting of filaments 10, expediently of niobium wires, which are individually vacuum-tightly passed through the terminating members 8 and are braided or twisted outside the discharge tube.
  • FIG. 2 one end of an electric discharge lamp with a ceramic discharge tube 3 according to the invention is shown in detail as an exemplary embodiment.
  • the end tube 3 terminating ceramic 8 are made of four elementary threads 10 made of niobium wire current leads 9, the two threads are connected to the electrode 11 in the discharge space, both electrically and thermally conductive on its U-shaped bent part.
  • the four elementary threads 10 protruding from the discharge space are twisted together and form a rigid arrangement in terms of strength.
  • filaments 10 which are expediently made of niobium wire, are passed through the ceramic terminating element 8, which closes off the ceramic discharge tube 3.
  • two filaments 10 are electrically short-circuited within the discharge space, and bent in a U-shape, in such a way that one filament 10, which is bent in a U-shape and expediently made of niobium, with the electrode 11, and the other also U -formally bent filament 10 is electrically connected to an auxiliary electrode 13.
  • the free ends of the filaments 10 protruding from the discharge space are twisted in pairs outside the discharge space, and they serve as current leads 9a and 9.
  • the power supply line 9 is made from three pieces of filaments 10 which are passed through the ceramic terminating element 8, which closes off the ceramic discharge tube 3. These are expediently made of niobium wire, in such a way that the three pieces of filaments 10 are connected to the electrode 11 at their ends projecting into the discharge space. The ends of the three filaments 10 protruding from the discharge space are twisted together outside the discharge space.
  • the invention is in no way limited to the exemplary embodiments described above.
  • the invention can also be carried out in such a way that only two or more elementary threads, which expediently consist of niobium wire, are passed through the ceramic terminating element and thus form the electrical power supply for the lamp, this being able to be realized in numerous possible variations. This is possible in particular because the number of filaments and the dimensions of these filaments are closely related to the power of the electric discharge lamp and are extremely variable.
  • the power supply can consist of two, three, four, five, etc. filaments depending on the power of the lamp and can be of any shape.
  • the arrangement of the filaments that form the current supply is indifferent in the ceramic terminating element. It is only essential that the filaments are soldered separately into the ceramic terminating element, apart from the type of their arrangement. The centering of the electrodes, the support of them, and their welding are facilitated if even-numbered i.e. two or four uses each. Elementary threads are used. If you want to use one or more of the filaments as a power supply for an auxiliary electrode, the use of odd-numbered filaments is more advantageous in this case. In the latter case, in the sense of the invention, as described above, the power supply for the main electrode can be formed from at least two or more filaments. The diameter of the filaments forming the power supply and the profile thereof can be chosen freely within the limits mentioned. The wires can have a circular, triangular or square cross-section.

Claims (4)

1. Lampe électrique à décharge comportant un récipient à décharge oblong et des électrodes dont les deux extrémités sont disposées dans le récipient à décharge ainsi que des plaques de céramique qui obturent les extrémités du récipient à décharge et grâce auxquelles les bornes d'amenée de courant pour les électrodes composées essentiellement de niobium, traversent et sont soudées de façon étanche au moyen d'un matériau de soudure céramique ou vitreux, caractérisée en ce que les bornes d'amenée de courant (10) pour les électrodes (11) se composent chacune de plusieurs fils séparés présentant une section d'au plus 0,3 mm2 et qui traversent de façon étanche les plaques céramiques (8).
2. Lampe électrique à décharge selon la revendication 1, caractérisée en ce que les bornes d'amenée de courant se composent de deux fils qui sont court-circuités en dehors de l'espace de décharge.
3. Lampe électrique à décharge selon la revendication 1, caractérisée en ce que les fils sont torsadés ou entrelacés en dehors de l'espace de décharge.
4. Lampe électrique à décharge selon les revendications 1 à 3, caractérisée en ce que les fils présentent une section circulaire, triangulaire ou quadrangulaire.
EP81730009A 1980-02-11 1981-01-23 Lampe à décharge électrique Expired EP0034113B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
HUEY000304 1980-02-11
HU8080304A HU178836B (en) 1980-02-11 1980-02-11 Electric discharge lamp of ceramic bulb

Publications (2)

Publication Number Publication Date
EP0034113A1 EP0034113A1 (fr) 1981-08-19
EP0034113B1 true EP0034113B1 (fr) 1984-12-05

Family

ID=10949005

Family Applications (1)

Application Number Title Priority Date Filing Date
EP81730009A Expired EP0034113B1 (fr) 1980-02-11 1981-01-23 Lampe à décharge électrique

Country Status (12)

Country Link
US (1) US4376905A (fr)
EP (1) EP0034113B1 (fr)
JP (1) JPS56128561A (fr)
AR (1) AR223093A1 (fr)
BR (1) BR8100689A (fr)
DD (1) DD156209A1 (fr)
DE (1) DE3167525D1 (fr)
ES (1) ES8202185A1 (fr)
HU (1) HU178836B (fr)
IN (1) IN154885B (fr)
SU (1) SU1138057A3 (fr)
ZA (1) ZA81274B (fr)

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
HU181782B (en) * 1981-01-09 1983-11-28 Egyesuelt Izzolampa Discharge vessel for high-pressure sodium-vapour discharge lamps
HU182834B (en) * 1982-02-25 1984-03-28 Egyesuelt Izzolampa Electric current lead-in, preferably for discharge vessel of high-pressure gas-discharge light-sources
US4742269A (en) * 1984-11-09 1988-05-03 Ngk Insulators, Ltd. Ceramic envelope device for high-pressure discharge lamp
DE9112690U1 (fr) * 1991-10-11 1991-12-05 Patent-Treuhand-Gesellschaft Fuer Elektrische Gluehlampen Mbh, 8000 Muenchen, De
DE9207816U1 (fr) * 1992-06-10 1992-08-20 Patent-Treuhand-Gesellschaft Fuer Elektrische Gluehlampen Mbh, 8000 Muenchen, De
DE4242122A1 (de) * 1992-12-14 1994-06-16 Patent Treuhand Ges Fuer Elektrische Gluehlampen Mbh Verfahren zur Herstellung einer vakuumdichten Abdichtung zwischen einem keramischen und einem metallischen Partner, insbesondere zur Anwendung bei der Herstellung eines Entladungsgefäßes für eine Lampe, sowie damit hergestellte Entladungsgefäße und Lampen
DE4242123A1 (de) * 1992-12-14 1994-06-16 Patent Treuhand Ges Fuer Elektrische Gluehlampen Mbh Hochdruckentladungslampe mit einem keramischen Entladungsgefäß
US7288303B2 (en) 2004-06-08 2007-10-30 Ngk Insulators, Ltd. Structures of brittle materials and metals
US7521870B2 (en) 2004-06-08 2009-04-21 Ngk Insulators, Ltd. Luminous containers and those for high pressure discharge lamps
DE602005027564D1 (de) * 2004-06-08 2011-06-01 Ngk Ceramic Device Co Ltd Lichtemittierender behälter und lichtemittierender behälter für eine hochdruck-entladungslampe

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2329118A (en) * 1941-07-12 1943-09-07 Gen Electric Electrode for electrical discharge devices
US2452626A (en) * 1945-03-03 1948-11-02 Gen Electric X Ray Corp Electron emitter
US3992642A (en) * 1975-12-15 1976-11-16 Mcvey Charles I Ceramic envelope plug and lead wire and seal
NL183613B (nl) * 1978-03-15 1988-07-01 Philips Nv Elektrische lamp.
US4295075A (en) * 1979-12-14 1981-10-13 Gte Products Corporation Arc discharge lamp having ceramic arc tube

Also Published As

Publication number Publication date
ZA81274B (en) 1982-04-28
AR223093A1 (es) 1981-07-15
HU178836B (en) 1982-07-28
SU1138057A3 (ru) 1985-01-30
IN154885B (fr) 1984-12-22
US4376905A (en) 1983-03-15
ES499273A0 (es) 1982-01-16
EP0034113A1 (fr) 1981-08-19
JPH0255905B2 (fr) 1990-11-28
BR8100689A (pt) 1981-08-18
DE3167525D1 (en) 1985-01-17
JPS56128561A (en) 1981-10-08
DD156209A1 (de) 1982-08-04
ES8202185A1 (es) 1982-01-16

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