EP0579326B1 - Lampe électrique munie d'un culot - Google Patents

Lampe électrique munie d'un culot Download PDF

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Publication number
EP0579326B1
EP0579326B1 EP19930202022 EP93202022A EP0579326B1 EP 0579326 B1 EP0579326 B1 EP 0579326B1 EP 19930202022 EP19930202022 EP 19930202022 EP 93202022 A EP93202022 A EP 93202022A EP 0579326 B1 EP0579326 B1 EP 0579326B1
Authority
EP
European Patent Office
Prior art keywords
lamp
conductor
tube
connection conductor
current supply
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 - Lifetime
Application number
EP19930202022
Other languages
German (de)
English (en)
Other versions
EP0579326A1 (fr
Inventor
Bernardus Hugo Maria Alfred Dorsemagen
Manfred Westemeyer
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.)
Philips Intellectual Property and Standards GmbH
Koninklijke Philips NV
Original Assignee
Philips Patentverwaltung GmbH
Koninklijke Philips Electronics NV
Philips Electronics NV
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 Philips Patentverwaltung GmbH, Koninklijke Philips Electronics NV, Philips Electronics NV filed Critical Philips Patentverwaltung GmbH
Priority to EP19930202022 priority Critical patent/EP0579326B1/fr
Publication of EP0579326A1 publication Critical patent/EP0579326A1/fr
Application granted granted Critical
Publication of EP0579326B1 publication Critical patent/EP0579326B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J5/00—Details relating to vessels or to leading-in conductors common to two or more basic types of discharge tubes or lamps
    • H01J5/50—Means forming part of the tube or lamps for the purpose of providing electrical connection to it
    • H01J5/54—Means forming part of the tube or lamps for the purpose of providing electrical connection to it supported by a separate part, e.g. base
    • H01J5/56—Shape of the separate part

Definitions

  • the invention relates to a capped electric lamp comprising:
  • Such a lamp in which the electric element is a pair of electrodes, is known from US 5 051 658.
  • the lamp is suitable for use as a light source in optical systems, for example, as a vehicle head lamp.
  • connection conductor in the known lamp is laid transversely over the second current supply conductor and is connected thereto in this crossed position by means of a resistance weld.
  • the weld is not reliable.
  • the weld is not of a reproducible quality and may have, for example, only a small size and be brittle, so that the connection is broken, for example, in the case of a fluctuating mechanical load, for example, under the influence of shocks or vibrations. The lamp will then fail prematurely.
  • this object is achieved in that the weld of the connection conductor is a butt weld to a molybdenum end portion of the second current supply conductor.
  • the butt weld in the lamp according to the invention was found to be reliable and strong, also in the case of mechanized manufacture.
  • the electric element may be a pair of electrodes in an ionisable gas, but may alternatively be an incandescent body, for example, in an inert gas comprising a halogen.
  • connection conductor may be desirable to provide the connection conductor with an electrically insulating screen laterally of the lamp vessel, for example, to prevent detrimental effects of corona discharges which may occur when the lamp is ignited at a high voltage and a high frequency.
  • a screen may alternatively be desirable for counteracting the disappearance of small ions, such as sodium, from the lamp vessel owing to photoemission. It is easy for this purpose to provide a tube of insulating material around the connection conductor. The tube, however, may rattle or shift around said conductor.
  • the lamp according to the invention comprises means for fixation of the tube.
  • connection conductor has a curvature in the tube, which curvature lies in the tube clamping against said tube. Both axial and transversal movements of the tube around the conductor are counteracted thereby.
  • the conductor instead of or in addition to the former solution, comprises a stop for the tube between the tube and the welded joint, for example, a clamped or welded sleeve provided around the conductor.
  • a stop for the tube between the tube and the welded joint for example, a clamped or welded sleeve provided around the conductor.
  • An outer envelope may be present around the lamp vessel. This envelope may be coupled to the first neck-shaped portion, for example, by means of a narrowed portion in this envelope.
  • the contact members at the lamp cap may be formed, for example, as pins, strips, bushes, etc., or a combination thereof, so as to cooperate with a connector which is connected to a supply source. It is also possible, however for an insulated cable to be fastened to each of the contact members with electrical conduction, which cables issue from a screen cover fastened to the lamp cap. Detachable electric connections can thus be moved to the supply source in this manner.
  • the lamp cap may consist of, for example, a synthetic resin, for example, a thermoplastic synthetic resin such as polyether imide, polyether sulphon, polyphenylene sulphide, polyether etherketone, polypropylene oxide, polyamide imide, polyimide, polybutylene terephthalate, which may be charged with powdery or fibrous substances such as, for example, glass, chalk.
  • the lamp cap may be integral with or form part of a reflector for the light generated by the lamp.
  • the capped electric lamp has a quartz glass lamp vessel 1 with a first 2 and a second neck-shaped portion 3 in mutually opposed arrangement and with seals through which respective current supply conductors 4, 5 extend to an electric element 6 arranged in the lamp vessel.
  • This element in the Fig. is a pair of electrodes in an ionisable gas.
  • the lamp vessel 1 is fixed to the first neck-shaped portion 2 inside a lamp cap 20 of insulating material.
  • the lamp cap has contact members 24, 25 to which the first current supply conductor 4 and the connection conductor 7, respectively, are connected.
  • the lamp vessel has an outer envelope 40.
  • the contact member 24 is a central pin, surrounded by an annular contact 25 at the outside of a collar 26.
  • the lamp cap can cooperate with a bayonet connector.
  • connection conductor 7 is a butt weld to a molybdenum end portion 5a of the second current supply conductor 5.
  • the end portion 5a in the Fig. is connected to a metal foil 5b, for example made of molybdenum, to which an electrode 6 is welded.
  • connection conductor 7 is surrounded by a tube 8 of insulating material, for example of ceramic material such as, for example, steatite or aluminium oxide, and comprises means 10, 11 for fixing this tube 8 immovably.
  • a tube 8 of insulating material for example of ceramic material such as, for example, steatite or aluminium oxide, and comprises means 10, 11 for fixing this tube 8 immovably.
  • connection conductor 7 has a curvature 10 which lies with clamping action in the tube 8.
  • the connection conductor 7 in addition has a stop 11 for the tube between the tube 8 and the weld 9.
  • the stop 11 is a kink in the connection conductor 7.
  • the first current supply conductor 4 has an end portion 4a with an undulated portion 4a' therein which is connected to a metal foil 4b to which an electrode 6 is welded.
  • the portion 4a' lies in an open tubular end portion 2' of the first neck-shaped portion 2 and offers said conductor expansion and contraction possibilities independently of its surroundings.
  • a similar lamp vessel has a lamp cap 30 with contact members 34, 35 at cables 37 issuing from the lamp cap to the exterior.
  • a kink 11 in the connection conductor 7 is present for immovably fixing the tube 8 of insulating material.

Landscapes

  • Vessels And Coating Films For Discharge Lamps (AREA)
  • Common Detailed Techniques For Electron Tubes Or Discharge Tubes (AREA)

Claims (5)

  1. Lampe électrique munie d'un culot comportant:
    un récipient de lampe en verre de quartz (1) présentant une première (2) et une deuxième partie en forme de col (3) l'une située vis-à-vis de l'autre et comportant des scellements à travers lesquels un premier (4) respectivement un deuxième conducteur d'alimentation de courant (5) s'étendent vers un élément électrique (6) disposé dans le récipient de lampe;
    un conducteur de connexion (7) présentant une connexion soudée (9) réalisée au deuxième conducteur d'alimentation de courant (5) situé à l'extérieur du récipient de lampe (1);
    un culot de lampe (20) en matériau d'isolation à l'intérieur duquel le récipient de lampe (1) est fixé à la première partie en forme de col (2) et qui comporte des éléments de contact (24, 25) auxquels sont fixés le premier conducteur d'alimentation de courant (4) respectivement le conducteur de connexion (7);
    caractérisée en ce que la soudure (9) du conducteur de connexion (7) est une soudure par refoulement (9) réalisée à une partie terminale en molybdène (5a) du deuxième conducteur d'alimentation de courant (5).
  2. Lampe électrique munie d'un culot selon la revendication 1, caractérisée en ce que le conducteur de connexion (7) est entouré d'un tube (8) en matériau d'isolation et en ce qu'il comporte des moyens (10, 11) pour fixer immobilement ce tube (8).
  3. Lampe électrique munie d'un culot selon la revendication 2, caractérisée en ce que le conducteur de connexion (7) présente une courbure (10) se situant de manière à se serrer dans le tube (8).
  4. Lampe électrique munie d'un culot selon la revendication 2 ou 3, caractérisée en ce que le conducteur de connexion (7) présente un arrêt (11) pour le tube (8) situé entre ledit tube et la soudure (9).
  5. Lampe électrique munie d'un culot selon la revendication 4, caractérisée en ce que l'arrêt (11) est un coude situé dans le conducteur de connexion (7).
EP19930202022 1992-07-13 1993-07-09 Lampe électrique munie d'un culot Expired - Lifetime EP0579326B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP19930202022 EP0579326B1 (fr) 1992-07-13 1993-07-09 Lampe électrique munie d'un culot

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
EP92202134 1992-07-13
EP92202134 1992-07-13
EP19930202022 EP0579326B1 (fr) 1992-07-13 1993-07-09 Lampe électrique munie d'un culot

Publications (2)

Publication Number Publication Date
EP0579326A1 EP0579326A1 (fr) 1994-01-19
EP0579326B1 true EP0579326B1 (fr) 1996-03-20

Family

ID=26131553

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19930202022 Expired - Lifetime EP0579326B1 (fr) 1992-07-13 1993-07-09 Lampe électrique munie d'un culot

Country Status (1)

Country Link
EP (1) EP0579326B1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19856602B4 (de) * 1997-12-08 2006-02-23 Koito Manufacturing Co., Ltd. Elektrische Entladungslampeneinrichtung

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE29507422U1 (de) * 1994-05-10 1995-06-29 Philips Electronics N.V., Eindhoven Gesockelte Hochdruckentladungslampe
CN1145133A (zh) * 1994-12-23 1997-03-12 菲利浦电子有限公司 有帽的电灯

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4136298A (en) * 1977-08-15 1979-01-23 General Electric Company Electrode-inlead for miniature discharge lamps
NL8600226A (nl) * 1985-11-19 1987-06-16 Philips Nv Gesokkelde voertuig-koplamp.
DE3743612A1 (de) * 1987-12-22 1989-07-06 Patent Treuhand Ges Fuer Elektrische Gluehlampen Mbh Hochdruckentladungslampe
US5216319A (en) * 1990-09-26 1993-06-01 U.S. Philips Corporation Capped high-pressure discharge lamp

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19856602B4 (de) * 1997-12-08 2006-02-23 Koito Manufacturing Co., Ltd. Elektrische Entladungslampeneinrichtung

Also Published As

Publication number Publication date
EP0579326A1 (fr) 1994-01-19

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