EP0186899B1 - Lampe à halogénure métallique à support de bouclier de tube à arc - Google Patents

Lampe à halogénure métallique à support de bouclier de tube à arc Download PDF

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Publication number
EP0186899B1
EP0186899B1 EP19850116518 EP85116518A EP0186899B1 EP 0186899 B1 EP0186899 B1 EP 0186899B1 EP 19850116518 EP19850116518 EP 19850116518 EP 85116518 A EP85116518 A EP 85116518A EP 0186899 B1 EP0186899 B1 EP 0186899B1
Authority
EP
European Patent Office
Prior art keywords
arc tube
metal halide
frame means
discharge lamp
cylindrical member
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
EP19850116518
Other languages
German (de)
English (en)
Other versions
EP0186899A2 (fr
EP0186899A3 (en
Inventor
Francis R. Koza
Robert J. Karlotski
Martin E. Muzeroll
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 EP0186899A2 publication Critical patent/EP0186899A2/fr
Publication of EP0186899A3 publication Critical patent/EP0186899A3/en
Application granted granted Critical
Publication of EP0186899B1 publication Critical patent/EP0186899B1/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
    • H01J61/82—Lamps with high-pressure unconstricted discharge having a cold pressure > 400 Torr
    • H01J61/827—Metal halide arc lamps
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J61/00—Gas-discharge or vapour-discharge lamps
    • H01J61/02—Details
    • H01J61/30—Vessels; Containers
    • H01J61/34—Double-wall vessels or containers

Definitions

  • the present invention relates, in general, to metal halide discharge lamps and more particularly to metal halide discharge lamps configured to prevent breakage of the lamp's outer envelope by reducing shard dispersion upon an arc tube fracture.
  • the high pressure discharge lamps of the invention operate by vaporizing mercury and selected metal halides and often are simply called metal halide lamps.
  • High wattage metal halide lamps which achieve relatively high efficacy are known in the art. However, these high wattage lamps are too large for general illuminating purposes in a home or the like.
  • Intermediate wattage metal halide lamps which can be used for some general illuminating purposes are known but their efficacy is low when compared with lamps of large sizes.
  • Another object of this invention is to provide means for supporting a light-source capsule and containment means about the capsule which will cause little or no loss of luminous efficacy in lamps utilizing such means.
  • FIGURE illustrates one embodiment of the metal halide lamp made in accordance with the teachings of the present invention.
  • the term "light-source capsule” denotes: an arc tube of an arc discharge lamp, or any light emitting capsule within the outer envelope of the lamp wherein the light-source capsule operates at a pressure other than atmospheric and the possibility of minor shard dispersion upon fracture of the light-source capsule exists.
  • Metal halide discharge lamp 10 includes an evacuated outer envelope 12, which is hermetically sealed to a glass stem member 14, and an external base 16.
  • Base 16 is formed for easy connection to an electrical source and is affixed to the hermetically sealed stem member 14 and outer envelope 12.
  • a pair of electrical conductors 18 and 20 are sealed into and pass through stem member 14 and are electrically connected to base 16, external of outer envelope 12, to provide access for energization of discharge lamp 10.
  • Frame means 22 extends along an axis substantially parallel to the longitudinal axis of discharge lamp 10 and includes a circular portion 24, in operative contact with an uppermost portion 23 of outer envelope 12, a helical portion 25 and a substantially straight portion 26.
  • Circular portion 24, in conjunction with the uppermost portion 23, and stem member 14 serve the dual function of maintaining frame means 22 in proper alignment and resisting deformation due to external shock to discharge lamp 10.
  • a cylindrical member 36 Disposed within outer envelope 12 is a cylindrical member 36, which may be in the form of a quartz sleeve or shield, which is supported by frame means 22. Also supported by frame means 22 and contained within quartz shield 36 is an arc tube 28.
  • Arc tube 28 has a chemical fill including a sodium halide and electrodes 29 and 30 at one end thereof.
  • electrode 29 is mechanically and electrically connected to frame means 22 through an electrical lead 32 while electrode 30 is affixed to an electrical lead 34 which passes above a portion of cylindrical member 36 and is electrically and mechanically connected to electrical connector 18 by a connector wire 40.
  • Wire 40 is preferably made of molybdenum.
  • Cylindrical member 36 is located within and is supported by helical portion 25 of frame means 22.
  • Cylindrical member 36 is secured in frame means 22 by a bend 21 and a small nickel wire 38 which is welded to the upper most part of said straight portion 26 of frame means 22.
  • a small kink or bend in the uppermost part of straight portion 26 may be substituted for wire 38 in securing cylindrical member 36 in position.
  • the purpose of the present invention is to provide a simple and inexpensive means for maintaining the cylindrical member about the arc tube and mounting the arc tube within the lamp without both a reduction in lamp performance and damage to the outer envelope.
  • Three conditions had to be met in order to arrive at a solution to the aforementioned problem. Firstly, the particular cylindrical member to be used, which is a transparent shield or quartz tube, had to be securely held in place in such a manner so that it did not come in contact with the arc tube. Secondly, proper distances had to be maintained between the electrical conductors of opposite electrical potential. Thirdly, the arc tube and the cylindrical member had to be held securely in their proper positions during regular handling. Any breach of the above conditions would have reduced lamp performance, shortened lamp life and would not have provided a permanent solution to preventing outer envelope damage due to an arc tube fracture.
  • arc tube 28 is parallel and substantially concentric to both quartz shield 36 and helical portion 25 of frame means 22.
  • Lead 32 is electrically coupled to frame means 22 and lead 34 is electrically coupled to conductor 18, in stem member 14, by connector wire 40.
  • a 40-watt lamp required the use of a quartz shield which had a wall thickness of about one millimeter in order to prevent the dispersion of shards and ultimate breakage of the outer envelope.
  • the frame means was partially formed in a helix in order to allow the quartz shield to be inserted freely and pushed up to touch the bend in the frame means (see the FIGURE).
  • the length of the frame means was about 95 millimeters (mm).
  • the helical portion was about 30 mm in length and had an average diameter of about 20 mm.
  • the length of the quartz shield was about 38 mm and the diameter was about 19 mm.
  • quartz shield 36 with the one millimeter wall thickness, was sufficient to prevent glass shards from damaging outer envelope 12.
  • Cylindrical member 36 may also be made of other materials suitable for withstanding shard impact (i.e., hard glass). Additional testing showed that the use of quartz tubing and the helical frame had a negligible effect on lamp performance and lamp life.
  • Other similar type lamps can be made shard-dispersion-proof by varying the diameter of the helical frame and the thickness of the quartz shield.
  • frame means therein for mounting an arc tube and fixedly maintaining a cylindrical member about the arc tube which will prevent shard dispersion upon a fracture of the arc tube itself.
  • frame means is provided in the form of a single wire member, which is parallel to the longitudinal axis of the lamp, that will serve to support the arc tube and the cylindrical member about the arc tube, thereby simplifying and lowering the cost of making such a lamp.

Landscapes

  • Vessels And Coating Films For Discharge Lamps (AREA)
  • Discharge Lamp (AREA)

Claims (9)

1. Lampe à décharge aux halogénures métalliques (10) comprenant une ampoule extérieure (12), un pied (14) logé à l'intérieur de la dite ampoule (12) ayant des entrées de courant (18, 20) le traversant, un moyen de cadre (22) logé à l'intérieur de la dite ampoule extérieure (12) et porté par une (20) des dites entrées de courant, un tube à arc (28) porté par et électriquement relié au dit moyen de cadre (22) ayant un remplissage chimique, le dit tube à arc (28) incluant deux entrées de courant électriques (32, 34) scellées dans et traversant au moins une de ses extrémités pour alimenter deux électrodes (29, 30) à l'intérieur, et un élément cylindrique (36) porté par le dit moyen de cadre (22) et entourant le dit tube à arc (28), le dit moyen de cadre (22) étant constitué par un unique fil portant le dit tube à arc (28) à l'intérieur de la dite lampe (10) et maintenant fermement le dit élément cylindrique (36) par rapport au dit tube à arc (28), le dit moyen de cadre (22) s'étendant le long d'un axe substantiellement parallèle à l'axe longitudinal de la dite lampe (10), le dit fil unique comprenant une petite partie circulaire (24) et une partie substantiellement rectiligne (26), la dite partie circulaire (24) étant en contact effectif avec la dite ampoule extérieure (12), dans laquelle il y a une partie hélicoïdale (25) du fil unique entre la partie circulaire (24) et la partie rectiligne (26) de celui-ci, et l'élément cylindrique (36) est logé à l'intérieur et est porté par la partie hélicoïdale (25).
2. Lampe à décharge aux halogénures métalliques selon la revendication 1 caractérisée en ce que la dite partie rectiligne (26) comporte un moyen (38) pour fixer le dit élément cylindrique (36) en position.
3. Lampe à décharge aux halogénures métalliques selon la revendication 2 caractérisée en ce que le dit moyen pour fixer le dit élément cylindrique comprend un petit fil (38) soudé à la dite partie rectiligne (26) du dit moyen de cadre (22).
4. Lampe à décharge aux halogénures métalliques selon la revendication 1 caractérisée en ce que le dit élément cylindrique (36) est un manchon de quartz qui évite une dispersion des éclats lors d'une rupture du dit tube à arc (28).
5. Lampe à décharge aux halogénures métalliques selon la revendication 4 caractérisée en ce que le dit manchon de quartz comporte une paroi d'une épaisseur de 1 millimètre environ pour une lampe de 40 Watt.
6. Lampe à décharge aux halogénures métalliques selon la revendication 4 caractérisée en ce que le dit tube à arc (28) est parallèle et substantiellement concentrique au dit manchon de quartz et à la dite partie hélicoïdale (25) du dit moyen de cadre (22), qu'une (32) des dites entrées de courant électriques (32, 34) du dit tube à arc (28) est électriquement reliée au dit moyen de cadre (22) et l'autre (34) des dites entrées de courant électriques (32, 34) est reliée électriquement à un conducteur électrique (18) dans le dit pied (14) par un fil de connexion (40).
7. Lampe à décharge aux halogénures métalliques selon la revendication 3 caractérisée en ce que le dit petit fil (28) est en nickel.
8. Lampe à décharge aux halogénures métalliques selon la revendication 6 caractérisée en ce que le dit fil de connexion (40) est en molybdène.
9. Lampe à décharge aux halogénures métalliques selon la revendication 1 caractérisée en ce que le dit élément cylindrique (36) est un manchon en verre dur.
EP19850116518 1984-12-28 1985-12-23 Lampe à halogénure métallique à support de bouclier de tube à arc Expired EP0186899B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US68734184A 1984-12-28 1984-12-28
US687341 1984-12-28

Publications (3)

Publication Number Publication Date
EP0186899A2 EP0186899A2 (fr) 1986-07-09
EP0186899A3 EP0186899A3 (en) 1988-10-19
EP0186899B1 true EP0186899B1 (fr) 1991-07-31

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP19850116518 Expired EP0186899B1 (fr) 1984-12-28 1985-12-23 Lampe à halogénure métallique à support de bouclier de tube à arc

Country Status (4)

Country Link
EP (1) EP0186899B1 (fr)
JP (1) JPS61161647A (fr)
CA (1) CA1239970A (fr)
DE (1) DE3583665D1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4317252C1 (de) * 1993-05-24 1994-05-05 Blv Licht & Vakuumtechnik Gasentladungslampe
US7852004B2 (en) 2007-06-06 2010-12-14 General Electric Company Ignition aid and fitting shroud for discharge lamp

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5532543A (en) * 1991-12-23 1996-07-02 Philips Electronics North America Corporation High density discharge lamp with pinched-on containment shield
EP0549056B1 (fr) * 1991-12-23 1996-05-22 Koninklijke Philips Electronics N.V. Lampe électrique à décharge
US5493167A (en) * 1994-05-03 1996-02-20 General Electric Company Lamp assembly with shroud employing insulator support stops
US6153968A (en) * 1998-10-02 2000-11-28 Philips Electronics North America Corp. Metal halide lamp with stem mounted support frame for arc tube shield
US6329742B1 (en) * 1999-06-02 2001-12-11 Philips Electronics North America Corp. Metal halide lamp with metal frame supporting a protective sleeve
US6291933B1 (en) * 1999-09-24 2001-09-18 Philips Electronics North America Corporation Metal halide lamp with ARC tube secured to frame by clips passing through protective sleeve
US6741013B2 (en) * 2000-12-13 2004-05-25 General Electric Company Shrouded electric lamp having functionally distinguishable center supports
US6844676B2 (en) 2001-10-01 2005-01-18 Koninklijke Philips Electronics N.V. Ceramic HID lamp with special frame wire for stabilizing the arc

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB489925A (en) * 1937-05-21 1938-08-05 British Thomson Houston Co Ltd Improvements in and relating to electric discharge lamps
GB737913A (en) * 1951-06-01 1955-10-05 Gen Electric Co Ltd Improvements in or relating to high pressure mercury vapour electric discharge lamps
US3218495A (en) * 1962-12-06 1965-11-16 Westinghouse Electric Corp Arc tube mount and component therefor
US3250934A (en) * 1963-11-22 1966-05-10 Sylvania Electric Prod Electric discharge device having heat conserving shields and sleeve
US4281274A (en) * 1979-08-01 1981-07-28 General Electric Co. Discharge lamp having vitreous shield
US4625141A (en) * 1984-10-29 1986-11-25 Gte Products Corporation Low wattage metal halide discharge lamp electrically biased to reduce sodium loss

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4317252C1 (de) * 1993-05-24 1994-05-05 Blv Licht & Vakuumtechnik Gasentladungslampe
US7852004B2 (en) 2007-06-06 2010-12-14 General Electric Company Ignition aid and fitting shroud for discharge lamp

Also Published As

Publication number Publication date
CA1239970A (fr) 1988-08-02
EP0186899A2 (fr) 1986-07-09
EP0186899A3 (en) 1988-10-19
JPS61161647A (ja) 1986-07-22
DE3583665D1 (de) 1991-09-05

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