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EP0386588B1 - Lampe à décharge à basse pression de mercure - Google Patents

Lampe à décharge à basse pression de mercure Download PDF

Info

Publication number
EP0386588B1
EP0386588B1 EP90103770A EP90103770A EP0386588B1 EP 0386588 B1 EP0386588 B1 EP 0386588B1 EP 90103770 A EP90103770 A EP 90103770A EP 90103770 A EP90103770 A EP 90103770A EP 0386588 B1 EP0386588 B1 EP 0386588B1
Authority
EP
European Patent Office
Prior art keywords
discharge lamp
pressure discharge
heating wire
lamp according
mercury low
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
EP90103770A
Other languages
German (de)
English (en)
Other versions
EP0386588A2 (fr
EP0386588A3 (fr
Inventor
Horst Wittmann
Michael Dietrich
Erolf Weinhardt
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 GmbH
Original Assignee
Patent Treuhand Gesellschaft fuer Elektrische Gluehlampen mbH
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 Patent Treuhand Gesellschaft fuer Elektrische Gluehlampen mbH filed Critical Patent Treuhand Gesellschaft fuer Elektrische Gluehlampen mbH
Publication of EP0386588A2 publication Critical patent/EP0386588A2/fr
Publication of EP0386588A3 publication Critical patent/EP0386588A3/fr
Application granted granted Critical
Publication of EP0386588B1 publication Critical patent/EP0386588B1/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
    • H01J61/00—Gas-discharge or vapour-discharge lamps
    • H01J61/02—Details
    • H01J61/12—Selection of substances for gas fillings; Specified operating pressure or temperature
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J61/00—Gas-discharge or vapour-discharge lamps
    • H01J61/02—Details
    • H01J61/24—Means for obtaining or maintaining the desired pressure within the vessel
    • H01J61/28—Means for producing, introducing, or replenishing gas or vapour during operation of the lamp
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J61/00—Gas-discharge or vapour-discharge lamps
    • H01J61/70—Lamps with low-pressure unconstricted discharge having a cold pressure < 400 Torr
    • H01J61/72—Lamps with low-pressure unconstricted discharge having a cold pressure < 400 Torr having a main light-emitting filling of easily vaporisable metal vapour, e.g. mercury

Definitions

  • the invention is based on a low-pressure mercury discharge lamp according to the preamble of claim 1. It relates in particular to lamps whose discharge vessel is coated with a phosphor.
  • DE-A-29 27 350 discloses the use of an elongated glass capsule as a mercury container.
  • a heating wire runs axially through the glass capsule and protrudes from it on both sides.
  • the opening of the glass capsule is again based on the HF induction principle.
  • DE-A-21 61 024 and DE-A-20 30 306 describe a method and a lamp produced by this method, a mercury-containing sealed glass capsule being clamped between an electrical conductor (cap tape) and the heating wire.
  • a disadvantage of this method is that the glass capsule must also be held in order to avoid uncontrolled rolling around of the opened glass capsule or of parts of the glass capsule in the lamp bulb. There is a risk of damage to the filament or the phosphor layer.
  • the invention improves the reliability of both the opening mechanism and the holding mechanism of the glass capsule. This is particularly important for mass production.
  • this reliable opening is achieved in that the heating wire is embedded twice in the same fusible seal (or also pinch). Compared to the prior art, this results in the surprising effect that the safety of tearing increases disproportionately.
  • the heating process promotes crack formation along the embedding of the heating wire in the pinch, but in addition the heat generated in one embedding also promotes rapid melt cracking in the other embedding due to the small distance between the other embedding. This effect can be exploited in that the time required for tearing is reduced.
  • the safety of rapid tearing is further improved in that the cap band is made of a resilient material and is welded to the heating wire while under pressure. When the pinch is heated, the heating wire then tends to expand together with the expanding cap band, which further promotes the formation of cracks.
  • the heating wire can consist of several sections with different diameters (e.g. 0.2 to 1.5 mm), which are butt welded together.
  • the electrical resistance can be optimized by selecting a material with a very high specific resistance.
  • An alloy of 50% iron, 47% nickel and 3% chromium, which is known under the trade name Vacovit (specific resistance ⁇ 0.92 ⁇ mm2 / m at 20 ° C), is particularly suitable. This alloy also has a thermal expansion coefficient that is well adapted to the glass used.
  • Figure 1 shows the frame structure of a rod-shaped fluorescent lamp.
  • a plate tube 1 is provided in a known manner with a pump tube 2 and a pinch seal 3.
  • Two power supply lines 4 are melted into the pinch seal 3 and hold a transverse spiral electrode 5. This is surrounded by a metallic cap band 6 in a ring (more precisely: oval shape).
  • the cap band which prevents blackening of the lamp bulb near the electrodes, is fastened in the pinch seal 3 with a potential-free wire 7.
  • the ring of the cap band is not completely closed, but has a gap 8, at which the two ends 9 of the cap band are spaced about 0.5 to 1 mm apart.
  • An elongated glass capsule 10 made of low-melting glass (lead glass (Duran) or soda-lime glass) is attached outside the cap band (see also FIGS. 2 and 3) approximately at the height of the gap 8. It is offset parallel to the gap 8 and arranged transversely to the helix 5.
  • a heating wire 11 made of Vacovit with a wire diameter of about 0.3 mm and curved in the manner of a "W" with rounded corners bridges the gap 8 of the cap band and holds the glass capsule 10.
  • the two ends of the heating wire are the outer long legs 12 of the "W "each attached to the cap band near the two ends 9 by means of a welding spot 13.
  • the two inner short legs 14 of the "W" which are at an acute angle similar to a slightly bent one
  • the hairpins converge, are melted into the first end 15 of the elongated glass capsule 10.
  • a part of the glass capsule including the first end 15 extends beyond the width of the cap band in the direction of the plate tube 1.
  • the second end 16 of the glass capsule is free and closes approximately at the level of the cap band. This end, too, is only melted by heating due to the surface tension.
  • the glass capsule has a length of 9 mm and an outer diameter of 2.5 mm.
  • the wall thickness of the glass is 0.2 mm.
  • the glass capsule is shown in section.
  • the mercury required to operate the lamp (approx. 4-8 mg depending on the lamp type) is stored in one or more porous tablets in tablet form 17 (cf. DE-U-85 35 777), which is in the glass capsule nearby of the second end 16 is.
  • the mercury can also be introduced into the glass capsule in another form (e.g. as a liquid drop or as an amalgam).
  • the gap of the cap band is advantageously offset against the glass capsule in order to better shield the spiral electrode.
  • FIG. 4 Another embodiment is shown in FIG. 4.
  • the glass capsule 18 is shortened in comparison to the first embodiment and is arranged rotated by 180 °, so that the second end 19 of the glass capsule is directed towards the plate tube (not shown).
  • the two relatively thin (diameter 0.2 mm) legs 21 of the heating wire are melted parallel to one another in the first end 20 of the glass capsule, which in this exemplary embodiment is squeezed in order to take account of the shortened length of the glass capsule and the better sealing which is thereby desirable and by a Bow piece 22 connected.
  • the two thicker ends 23 of the heating wire (diameter 1.5 mm) are angled outwards relative to the inner legs by approximately 30 ° and, similarly to the first embodiment, are fastened to the cap band with welding spots 24.
  • the two legs are under outward tension.
  • the heating wire is longer overall and the tension is weaker.
  • the crack that forms in the melting of the first end of the glass capsule is directed away from the discharge volume.
  • the overall arrangement is less rigid overall than in the second embodiment.
  • the glass capsule can additionally be attached to the cap band by means of tabs or the like. be attached in a conventional manner.
  • FIG. 5 A third embodiment is shown in FIG. 5. It is particularly well suited for flashlights with a horizontal filling (or opening of the glass capsule).
  • the legs 25 extend over a substantial part (approx. 5 mm) of the total length of the cylindrical glass capsule 26 (approx. 9 mm).
  • the ends of the heating wire 27 are angled outside the simple fusible seal 28 of the first end of the glass capsule (cranked), so that the legs and heating wire ends are guided parallel to one another, albeit at different distances. This makes welding easier.
  • the ring-shaped cap band 29 is compressed somewhat before the heating wire is welded on, so that the gap 30, which was originally approximately 2 mm wide, is narrowed to 0.5 mm.
  • the heating wire 31 is artificially impressed with a spring force which supports the tearing open of the first end 28 of the glass capsule during the induction of the high frequency.
  • FIG. 6 Another highlight of this arrangement is that (Fig. 6) that by the horizontal position of the glass capsule 26 at the time of RF induction, gravity at the second end 32 of the glass capsule supports the tearing process.
  • the length of the glass capsule 26 acts like a lever arm.
  • the second end 32 tilts down.
  • the fact that the heating wire legs 25 extend far into the interior of the glass capsule, a small tilt angle is sufficient to allow the bow piece 33 to rest against the inner wall of the glass capsule.
  • the heat of the heating wire forms a second opening 34 on the glass capsule at this point, through which the mercury can escape in addition to the first opening 46.
  • the capsule wall resting against the legs 25 deforms outwards.
  • FIG. 7 A further embodiment, which is particularly well suited for ring lamps (or also compact lamps) without a cap band, is shown in FIG. 7.
  • the heating wire 35 is located just below the coil 36 on one of the two power supply lines 4a - and / or on a separate one that is melted into the pinch seal 37 Wire 38 (shown in broken lines) - fastened (welding point 39).
  • the two heating wire ends made of iron (diameter 1.5 mm) are closed to form a ring 40 which does not touch the second power supply 4b.
  • the glass capsule 41 itself is arranged similarly to the third embodiment.
  • the two heating wire legs 42 made of Vacovit (diameter 0.2 mm) are melted parallel to each other into the melt seal of the first end 43 and connected with an arc piece 44.
  • the axis of the glass capsule 41 and the legs 42 are perpendicular to the plane of the ring 40.
  • This embodiment is also particularly suitable for lamps whose power supplies are fixed in a technique known per se by means of a glass bead.
  • the manufacturing process for the third embodiment is to be explained by way of example below: A glass tube is melted at one end at a temperature of 1100 ° C. and slowly cooled. The mercury-containing tablet is then placed in an argon atmosphere in the vertically closed glass tube which is closed on one side. The legs of the heating wire are inserted into the other open end. The open end is heated and sealed. The sealed glass capsule is then slowly cooled and attached to the compressed cap band.
  • the opening of the glass capsule takes place later in the densely melted lamp bulb 45 (FIG. 6) by inducing an HF field from the outside in a manner known per se. It is essential here that the cap band including the heating wire (or the ring attached to the power supply) form an electrically closed circuit.
  • a suitable selection of the heating wire ensures that only the heating wire or the part of the heating wire located on the glass capsule heats up significantly, without the cap band being able to heat up noticeably and release contaminants.
  • a particular advantage of the new lamps with regard to environmental damage is that the glass capsule is not opened at all in the case of non-functioning lamps, so that disposal is simplified.
  • the mercury tablet can be recovered. There is no longer any unnecessary contamination of the environment by liquid mercury.
  • the application of the invention is not to low-pressure mercury discharge lamps, especially limited fluorescent lamps in the form of bars and rings or compact lamps.
  • the invention can also be applied to all mercury-containing lamps (high-pressure lamps).

Landscapes

  • Vessels And Coating Films For Discharge Lamps (AREA)
  • Manufacture Of Electron Tubes, Discharge Lamp Vessels, Lead-In Wires, And The Like (AREA)
  • Discharge Lamp (AREA)
  • Discharge Lamps And Accessories Thereof (AREA)

Claims (17)

  1. Lampe à décharge basse pression au mercure, comprenant deux électrodes (5; 36) et une capsule (10; 18; 26; 41) de verre fermée, qui est prévue dans une ampoule (45) fermée, qui contient une certaine quantité de mercure et qui est ouverte par chauffage par induction d'un fil (11; 31; 35) de chauffage, qui y est relié, le fil de chauffage étant fixé par ses extrémités à un conducteur électrique se trouvant dans l'ampoule de lampe, caractérisée en ce que la capsule (10; 18; 36; 41) en verre est un récipient oblong à deux extrémités, et en ce que le fil (11; 31; 35) de chauffage est recourbé en épingle à cheveux et comportent deux branches (14; 21; 25; 42), qui sont sensiblement parallèles l'une à l'autre et qui sont scellées en commun à la première extrémité (15; 20; 28; 43) du récipient oblong et sont reliées (22; 23; 44) entre elles à l'intérieur du récipient.
  2. Lampe à décharge basse pression au mercure suivant la revendication 1, caractérisée en ce que les deux branches du fil de chauffage sont sous contrainte de traction.
  3. Lampe à décharge basse pression au mercure suivant la revendication 2, caractérisée en ce que la contrainte de traction repose sur l'action d'une force élastique du fil de chauffage qui provient du processus de scellement.
  4. Lampe à décharge basse pression au mercure suivant la revendication 2, caractérisée en ce que la contrainte de traction repose sur l'action d'une force élastique du conducteur électrique, qui a été obtenue lors de la fixation du fil de chauffage au conducteur.
  5. Lampe à décharge basse pression au mercure suivant la revendication 1, caractérisée en ce que les deux extrémités (15, 16; 28, 32) du récipient oblong sont fermées au moyen d'une étanchéité obtenue par scellement.
  6. Lampe à décharge basse pression au mercure suivant la revendication 1, caractérisée en ce que la première extrémité (20) du récipient oblong est fermée par une étanchéité obtenue par pincement.
  7. Lampe à décharge basse pression au mercure suivant la revendication 1, caractérisée en ce que le fil de chauffage a une résistance électrique plus grande que le conducteur électrique.
  8. Lampe à décharge basse pression au mercure suivant la revendication 1, caractérisée en ce que le fil de chauffage est composé de plusieurs tronçons (21, 23) de résistance électrique différente, le tronçon ayant la résistance électrique la plus grande étant relié à la capsule de verre.
  9. Lampe à décharge basse pression au mercure suivant la revendication 7, caractérisée en ce que le fil de chauffage est en un alliage de fer, de nickel et de chrome.
  10. Lampe à décharge basse pression au mercure suivant la revendication 8 ou 9, caractérisée en ce que le diamètre du fil de chauffage ou du tronçon du fil de chauffage qui est relié à la capsule de verre est compris entre 0,2 et 0,4 mm environ.
  11. Lampe à décharge basse pression au mercure suivant la revendication 1, caractérisée en ce que la capsule de verre est en verre à bas point de fusion et a une épaisseur de paroi de 0,2 mm environ.
  12. Lampe à décharge basse pression au mercure suivant la revendication 1, caractérisée en ce que les deux branches (25) s'étendent vers l'intérieur sur une partie importante de la longueur de la capsule (26) en verre.
  13. Lampe à décharge basse pression au mercure suivant la revendication 1, caractérisée en ce que les extrémités des fils (12; 23; 27) de chauffage se prolongent aux branches (14; 21; 25; 42) par une partie courbée dirigée vers l'extérieur.
  14. Lampe à décharge basse pression au mercure suivant la revendication 1, caractérisée en ce que le conducteur électrique est une coiffe (6; 29) métallique qui entoure une électrode (5; 36) de la lampe et qui comporte une fente (8; 30), le fil de chauffage recouvrant la fente.
  15. Lampe à décharge basse pression au mercure suivant la revendication 4 ou 14, caractérisée en ce que la fente est si rétrécie en tirant parti des propriétés élastiques de la coiffe, que la coiffe est sous contrainte de traction.
  16. Lampe à décharge basse pression au mercure suivant la revendication 1 ou 8, caractérisée en ce que le conducteur électrique est l'une des deux entrées (4a) de courant, qui maintiennent une électrode, les extrémités du fil de chauffage étant conformées en une bague (40) fermée.
  17. Lampe à décharge basse pression au mercure suivant la revendication 1, caractérisée en ce que le conducteur électrique est un fil (18) qui n'est pas porté à un potentiel et qui est voisin d'une entrée de courant.
EP90103770A 1989-03-07 1990-02-27 Lampe à décharge à basse pression de mercure Expired - Lifetime EP0386588B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3907277 1989-03-07
DE3907277A DE3907277A1 (de) 1989-03-07 1989-03-07 Quecksilberniederdruckentladungslampe

Publications (3)

Publication Number Publication Date
EP0386588A2 EP0386588A2 (fr) 1990-09-12
EP0386588A3 EP0386588A3 (fr) 1991-07-24
EP0386588B1 true EP0386588B1 (fr) 1994-05-04

Family

ID=6375708

Family Applications (1)

Application Number Title Priority Date Filing Date
EP90103770A Expired - Lifetime EP0386588B1 (fr) 1989-03-07 1990-02-27 Lampe à décharge à basse pression de mercure

Country Status (9)

Country Link
US (1) US5006755A (fr)
EP (1) EP0386588B1 (fr)
JP (1) JPH02278649A (fr)
KR (1) KR0149495B1 (fr)
CA (1) CA2011582A1 (fr)
DD (1) DD292564A5 (fr)
DE (2) DE3907277A1 (fr)
ES (1) ES2052088T3 (fr)
HU (1) HU205489B (fr)

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Publication number Priority date Publication date Assignee Title
CA2091470A1 (fr) * 1992-04-28 1993-10-29 Katherine L. Mcginnis Methode et dispositif de diffusion de mercure dans une lampe a arc
US5394056A (en) * 1993-04-07 1995-02-28 General Electric Company Opening of capsule inside sealed lamp
US5521460A (en) * 1994-08-24 1996-05-28 Osram Sylvania Inc. Lamp base locking clip
BE1009761A3 (nl) * 1995-10-30 1997-08-05 Philips Electronics Nv Werkwijze voor het vervaardigen van een lagedrukkwikontladingslamp en lagedrukkwikontladingslamp die met een dergelijke werkwijze is te vervaardigen.
DE19613502C2 (de) * 1996-04-04 1998-07-09 Heraeus Noblelight Gmbh Langlebiger Excimerstrahler und Verfahren zu seiner Herstellung
CA2177108C (fr) * 1996-05-22 2002-10-22 Minoru Myojo Lampe a decharge a vapeur de mercure basse pression
CA2255081C (fr) * 1997-04-18 2006-07-25 Patent-Treuhand-Gesellschaft Fuer Elektrische Gluehlampen Mbh Lampe electrique comprenant entree de courant avec le segment de finition aplati en forme de u
JP2000173537A (ja) * 1998-09-29 2000-06-23 Toshiba Lighting & Technology Corp 低圧水銀蒸気放電灯および照明装置
JP2003535798A (ja) * 2000-06-23 2003-12-02 グラヴルベル 透明ガラス
US6787980B2 (en) * 2000-09-22 2004-09-07 Matsushita Electric Industrial Co., Ltd. Mercury-containing material, method for producing the same and fluorescent lamp using the same
DE10201617C5 (de) * 2002-01-16 2010-07-08 Wedeco Ag Water Technology Amalgamdotierter Quecksilberniederdruck-UV-Strahler
JP2007528097A (ja) * 2003-06-26 2007-10-04 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 低圧式水銀蒸気放電ランプ
MXPA06005142A (es) * 2003-11-10 2007-01-26 Inoflate Llc Metodo y dispositivo para presurizar envases.
US20050165275A1 (en) * 2004-01-22 2005-07-28 Kenneth Von Felten Inspection device insertion tube
ITMI20050570A1 (it) * 2005-04-06 2006-10-07 Getters Spa Dispensatore di mercurio per lampade fluorescenti
SE530754C2 (sv) * 2006-01-25 2008-09-02 Auralight Int Ab Kompaktlysrörsanpassad katodskärm
ITRM20080334A1 (it) * 2008-06-25 2009-12-26 Getters Spa Lampada fluorescente a catodo caldo contenente un dispositivo per il rilascio di mercurio e getter
US8471455B2 (en) * 2010-01-27 2013-06-25 General Electric Company Positioning of auxiliary amalgam

Family Cites Families (9)

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Publication number Priority date Publication date Assignee Title
US2288253A (en) * 1941-06-21 1942-06-30 Westinghouse Electric & Mfg Co Introducing mercury into vacuum devices
NL158652B (nl) * 1969-06-27 1978-11-15 Philips Nv Werkwijze voor de vervaardiging van een lagedrukkwikdampontladingslamp.
NL162244C (nl) * 1970-12-25 1980-04-15 Philips Nv Lagedrukkwikdampontladingslamp.
US4056750A (en) * 1976-12-17 1977-11-01 Gte Sylvania Incorporated Mercury dispenser for discharge lamps
JPS54135466A (en) * 1978-04-12 1979-10-20 Toshiba Corp Fluorescent lamp
US4182971A (en) * 1978-07-10 1980-01-08 Gte Sylvania Incorporated Mercury-containing glass-capsule dispenser for discharge lamps
US4335326A (en) * 1980-04-23 1982-06-15 Gte Products Corporation Mercury dispenser for discharge lamps
US4495440A (en) * 1982-08-23 1985-01-22 Gte Products Corporation Arc-extinguishing ampul and fluorescent lamp having such ampul mounted on each electrode structure
DE3545073A1 (de) * 1985-12-19 1987-07-02 Patent Treuhand Ges Fuer Elektrische Gluehlampen Mbh Speicherelement zum dosieren und einbringen von fluessigem quecksilber in eine entladungslampe

Also Published As

Publication number Publication date
CA2011582A1 (fr) 1990-09-07
KR900015242A (ko) 1990-10-26
HU205489B (en) 1992-04-28
DE3907277A1 (de) 1990-09-20
EP0386588A2 (fr) 1990-09-12
KR0149495B1 (ko) 1998-10-01
EP0386588A3 (fr) 1991-07-24
JPH02278649A (ja) 1990-11-14
JPH0586027B2 (fr) 1993-12-09
US5006755A (en) 1991-04-09
ES2052088T3 (es) 1994-07-01
HUT53986A (en) 1990-12-28
HU901324D0 (en) 1990-05-28
DD292564A5 (de) 1991-08-01
DE59005571D1 (de) 1994-06-09

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