EP0577198A1 - Gesockelte elektrische Lampe - Google Patents

Gesockelte elektrische Lampe Download PDF

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Publication number
EP0577198A1
EP0577198A1 EP93201824A EP93201824A EP0577198A1 EP 0577198 A1 EP0577198 A1 EP 0577198A1 EP 93201824 A EP93201824 A EP 93201824A EP 93201824 A EP93201824 A EP 93201824A EP 0577198 A1 EP0577198 A1 EP 0577198A1
Authority
EP
European Patent Office
Prior art keywords
lamp
sleeve
welding
lamp vessel
capped electric
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
EP93201824A
Other languages
English (en)
French (fr)
Other versions
EP0577198B1 (de
Inventor
Johannes Gerhard Möller
Reiner Feder
Willem Godefridus De Vrij
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 EP19930201824 priority Critical patent/EP0577198B1/de
Publication of EP0577198A1 publication Critical patent/EP0577198A1/de
Application granted granted Critical
Publication of EP0577198B1 publication Critical patent/EP0577198B1/de
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: a glass lamp vessel with, in mutually opposing arrangement, a first and a second neck-shaped portion with seals through which respective current supply conductors extend to an electric element arranged in the lamp vessel; a metal sleeve having a longitudinal slot around the first neck-shaped portion of the lamp vessel, holding the lamp vessel with clamping fit, which sleeve has a welding zone and a first and a second clamping zone each with a loop in the shape of an open hairpin, which clamping zones have respective, mutually opposing welding lugs which are interconnected by means of a welded joint so as to close the sleeve; a metal fixation member provided with tongues which are welded to the sleeve in the latter's welding zone; a lamp cap of insulating material connected to the lamp vessel, in which lamp cap the fixation member is fixed and which has contact members to which the current supply conductors are connected.
  • Such a lamp, in which the electric element is a pair of electrodes, is known from EP 0 478 058 A1.
  • the lamp is designed to be used as a light source in optical systems, for example as a vehicle headlamp.
  • the sleeve and the fixation member are necessary for fixing the lamp vessel to the lamp cap in a position in which the electric element, or in the case of a pair of electrodes the discharge arc between them, is aligned relative to reference locations on the lamp cap.
  • the electric element is given a predetermined position when the lamp is placed in an optical system.
  • the lamp vessel may be shifted, tilted, and rotated during alignment, as necessary.
  • the sleeve It is of major importance for the sleeve to hold on to the lamp vessel securely and nevertheless to cause no damage to the glass. It should be prevented that the sleeve loses its grip in the case of a temperature rise, during lamp operation, owing to a comparatively great thermal expansion, while on the other hand it should be prevented that the sleeve clamps too strongly at normal temperatures, when the lamp is extinguished, and generates undesirable strain in the glass.
  • this object is achieved in that the welding zone has mutually opposing closing tags alongside the slot.
  • the electrodes used for making the welded joints between the mutually opposing welding lugs must exert on the welding lugs at force which is necessary for bringing the latter against one another before the welded joint can be made.
  • the welding electrodes must exert a force during this which is different from the ideal mechanical force during welding.
  • the electrodes may perform uncontrolled lateral movements during this, whereby the sleeve is also moved and damage to the glass may ensue.
  • the closing tags form a provision which is separate from the welding lugs and on which tools can bear so as to pull them towards one another and thus press the welding lugs against one another.
  • the closing tags may also be used for opening the sleeve further while it is being provided.
  • the closing tags are preferably so positioned as to be spaced apart from one another in the finished lamp, and accordingly also during and after fixing of the sleeve. It is ensured thereby to a greater extent that the welding lugs can actually be brought against one another. It is alternatively possible, however, for the closing tags to have the same interspacing as the welding lugs.
  • the loop in the shape of an open hairpin then provides the tolerance necessary in view of dimensional variations of the clamped-in glass. The tools keep the sleeve stationary, so that welding electrodes cannot cause a movement of the sleeve.
  • the closing tags render it possible to close the sleeve in a contactless manner, for example by means of laser welding, because the welding lugs are already pressed against one another by the force applied to the closing tags.
  • the welding zone lies clear of the clamped-in glass.
  • each clamping zone comprises a second loop in the shape of an open hairpin. It is very favourable if the loops are positioned symmetrically relative to the longitudinal slot, for example, in a geometry in which the loops each enclose an angle of 90 ⁇ 10° with the welding lugs. It was found that additional loops do not lead to a substantial further widening of the tolerances.
  • the two loops in the geometry described have the advantage that the sleeve can be provided with a comparatively great pre-tension, i.e. that the sleeve already surrounds the glass with clamping fit when it has been provided, but has not yet been closed.
  • the sleeve has guiding tags which are directed towards the electric element and whose interspacing increases in a direction away from the sleeve, which guiding tags guide the glass to be clamped into the sleeve, acting as a funnel, when the sleeve is being provided.
  • the electric element may be a pair of electrodes in an ionizable gas, but alternatively may be an incandescent body, for example, in an inert gas comprising halogen.
  • the lamp vessel usually comprises glass with an SiO2 content of at least 95% by weight, such as quartz glass, or alternatively hard glass.
  • An outer envelope may surround the lamp vessel.
  • This envelope may be coupled to the first neck-shaped portion, for example, by means of a narrowed portion in the former.
  • the sleeve may also bear directly on the first neck-shaped portion, but it is alternatively possible for the sleeve to bear on the outer envelope while surrounding the first neck-shaped portion. In that caste the sleeve holds the lamp vessel with clamping fit in that the outer envelope is coupled to the lamp vessel.
  • the sleeve may be readily made from plate material, for example, stainless steel, for example, spring steel.
  • the contact members at the lamp cap may be formed as, for example, pins, strips, bushes, etc., or a combination thereof, so as to cooperate with a connector which is connected to a supply source. It is alternatively possible, however, that an insulated cable is fastened to each of the contact members with electric conduction, issuing to the exterior from a cover fastened to the lamp cap. Detachable electrical connections may thus be displaced towards the supply source.
  • 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 integrated with or form part of a reflector for the light generated by the lamp.
  • the capped electric lamp has a glass lamp vessel 1 with, in mutually opposing arrangement, a first 2 and a second 3 neck-shaped portion with seals through which respective current supply conductors 4, 5 extend to an electric element 6 arranged in the lamp vessel.
  • the said element in the Figures is a pair of electrodes in an ionizable gas.
  • a metal sleeve 10 (see Figs. 4 and 5) with a longitudinal slot 11 is present around the first neck-shaped portion 2 of the lamp vessel 1, holding the lamp vessel with clamping fit.
  • the sleeve (see Fig. 5) has a welding zone 12 and a first 13 and a second 14 clamping zone, each with an open hairpin loop 15.
  • the clamping zones 13, 14 each have a welding lug 16 alongside the slot 11, which lugs oppose one another and are interconnected by means of a welded joint so as to close the sleeve 10.
  • a metal fixation member 20 (Fig. 4) is provided with tongues 21 which are welded to the clamping member 10 in the welding zone 12 thereof.
  • the lamp has a lamp cap 30 (30' in Fig. 2) of insulating material which is connected to the lamp vessel 1 and in which the fixation member 20 is fixed, in the figure by means of scraping tags 22 present on said member.
  • Contact members 35, 36 (35', 36') are present, connected to the current supply conductor 4 and, through a connection conductor 7, to the current supply conductor 5.
  • the contact member 36 is a cylindrical ring at the outside of a collar 39 which surrounds the central, pin-shaped contact member 35.
  • the cap can make contact with a bayonet connector which mechanically cooperates with a projection 38.
  • the lamp cap 30 (30') has a screen cap 31 (31').
  • the lamp cap 30' of Fig. 2 has a cover 37 from which cables issue to the exterior, carrying the contacts.
  • the lamp vessel 1 has an outer envelope 40 which is kept centred around the conductor 3 by means of a narrowed portion 41.
  • the connection conductor 7 is surrounded by an insulator 8.
  • the welding zone 12 of the sleeve 10 has mutually opposing closing tags 17 (see Fig. 5) alongside the slot 11.
  • the lamp vessel 1 has an outer envelope 50 which at the area of narrowed portions 51, 52 therein is securely coupled to the lamp vessel.
  • the diagrammatically indicated sleeve 10 around the first neck-shaped portion 2 is securely coupled to the outer envelope, and thus to the lamp vessel.
  • the seal in the said neck-shaped portion has reference numeral 9.
  • the fixation member 20 is fixed with its tongues 21 in the welding zone 12 of the diagrammatically indicated sleeve 10 by means of welding.
  • the sleeve is present with direct clamping action on the neck-shaped portion 2 comprising the seal 9 of a lamp vessel as in Figs. 1 and 2.
  • the closing tags 17 are at a distance from one another, also when mutually opposing welding lugs 16 have been brought into contact with one another in that the closing tags were pulled towards one another by tools. This is evident from the greater interspacing between the closing tags 17 as compared with the welding lugs 16 (see Figs. 5a and b).
  • the welding zone 12 for making welded joints with the fixation member 20 (Fig. 4) in the mounted sleeve 10 clears the clamped-in glass 2 (Fig. 4), which is evident from the fact that the internal diameter of the sleeve is greater in the welding zone than in the first 13 and second 14 clamping zone adjoining it on either side.
  • Each clamping zone 13, 14 has a second open hairpin loop 15 (Fig. 5a).
  • the loops 15 are symmetrically arranged relative to the slot 11 (Figs. 5a, b). They enclose an angle of 90 ⁇ 10° with the welding lugs 16.
  • the sleeve 10 shown has guiding tags 18 which are directed towards the electric element 6 and whose interspacing increases in a direction away from the sleeve, so that they give the sleeve a funnel shape, whereby the sleeve can be readily provided around the glass 2 also if it has a smaller internal diameter than the glass in the non-assembled state.
EP19930201824 1992-07-01 1993-06-24 Gesockelte elektrische Lampe Expired - Lifetime EP0577198B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP19930201824 EP0577198B1 (de) 1992-07-01 1993-06-24 Gesockelte elektrische Lampe

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
EP92201953 1992-07-01
EP92201953 1992-07-01
EP19930201824 EP0577198B1 (de) 1992-07-01 1993-06-24 Gesockelte elektrische Lampe

Publications (2)

Publication Number Publication Date
EP0577198A1 true EP0577198A1 (de) 1994-01-05
EP0577198B1 EP0577198B1 (de) 1996-03-27

Family

ID=26131518

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19930201824 Expired - Lifetime EP0577198B1 (de) 1992-07-01 1993-06-24 Gesockelte elektrische Lampe

Country Status (1)

Country Link
EP (1) EP0577198B1 (de)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1995032516A1 (en) * 1994-05-19 1995-11-30 Philips Electronics N.V. Capped high-pressure discharge lamp
WO1996020493A1 (en) * 1994-12-23 1996-07-04 Philips Electronics N.V. Capped electric lamp
EP0696046A3 (de) * 1994-08-04 1997-12-17 Patent-Treuhand-Gesellschaft für elektrische Glühlampen mbH Einseitig gesockelte Hochdruckentladungslampe
EP1439569A2 (de) * 2003-01-03 2004-07-21 General Electric Company Entladungslampe mit Sockel und Verfahren und Halterung zu ihrer Herstellung

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2515747A (en) * 1949-11-14 1950-07-18 Gen Electric Lamp base
US4812703A (en) * 1985-12-19 1989-03-14 Koito Seisakusho Co., Ltd. Electric lamp assembly
EP0309041A1 (de) * 1987-09-24 1989-03-29 Koninklijke Philips Electronics N.V. Gesockelte elektrische Lampe
EP0478058A1 (de) * 1990-09-26 1992-04-01 Koninklijke Philips Electronics N.V. Gesockelte Hochdruckentladungslampe
EP0490702A1 (de) * 1990-12-14 1992-06-17 General Electric Company Lampenhalterung und Einbau derselben

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2515747A (en) * 1949-11-14 1950-07-18 Gen Electric Lamp base
US4812703A (en) * 1985-12-19 1989-03-14 Koito Seisakusho Co., Ltd. Electric lamp assembly
EP0309041A1 (de) * 1987-09-24 1989-03-29 Koninklijke Philips Electronics N.V. Gesockelte elektrische Lampe
EP0478058A1 (de) * 1990-09-26 1992-04-01 Koninklijke Philips Electronics N.V. Gesockelte Hochdruckentladungslampe
EP0490702A1 (de) * 1990-12-14 1992-06-17 General Electric Company Lampenhalterung und Einbau derselben

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1995032516A1 (en) * 1994-05-19 1995-11-30 Philips Electronics N.V. Capped high-pressure discharge lamp
EP0696046A3 (de) * 1994-08-04 1997-12-17 Patent-Treuhand-Gesellschaft für elektrische Glühlampen mbH Einseitig gesockelte Hochdruckentladungslampe
WO1996020493A1 (en) * 1994-12-23 1996-07-04 Philips Electronics N.V. Capped electric lamp
EP1439569A2 (de) * 2003-01-03 2004-07-21 General Electric Company Entladungslampe mit Sockel und Verfahren und Halterung zu ihrer Herstellung
EP1439569A3 (de) * 2003-01-03 2007-08-29 General Electric Company Entladungslampe mit Sockel und Verfahren und Halterung zu ihrer Herstellung

Also Published As

Publication number Publication date
EP0577198B1 (de) 1996-03-27

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