EP1594158A2 - Lampe à incandescence avec un corps lumineux contenant de carbide - Google Patents

Lampe à incandescence avec un corps lumineux contenant de carbide Download PDF

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Publication number
EP1594158A2
EP1594158A2 EP05004050A EP05004050A EP1594158A2 EP 1594158 A2 EP1594158 A2 EP 1594158A2 EP 05004050 A EP05004050 A EP 05004050A EP 05004050 A EP05004050 A EP 05004050A EP 1594158 A2 EP1594158 A2 EP 1594158A2
Authority
EP
European Patent Office
Prior art keywords
incandescent lamp
filament
wire
lamp according
coating
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.)
Withdrawn
Application number
EP05004050A
Other languages
German (de)
English (en)
Other versions
EP1594158A3 (fr
Inventor
Georg Rosenbauer
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 EP1594158A2 publication Critical patent/EP1594158A2/fr
Publication of EP1594158A3 publication Critical patent/EP1594158A3/fr
Withdrawn legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01K—ELECTRIC INCANDESCENT LAMPS
    • H01K1/00—Details
    • H01K1/02—Incandescent bodies
    • H01K1/04—Incandescent bodies characterised by the material thereof
    • H01K1/10—Bodies of metal or carbon combined with other substance
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01K—ELECTRIC INCANDESCENT LAMPS
    • H01K1/00—Details
    • H01K1/02—Incandescent bodies
    • H01K1/14—Incandescent bodies characterised by the shape
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01K—ELECTRIC INCANDESCENT LAMPS
    • H01K1/00—Details
    • H01K1/28—Envelopes; Vessels
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01K—ELECTRIC INCANDESCENT LAMPS
    • H01K1/00—Details
    • H01K1/40—Leading-in conductors

Definitions

  • the invention is based on an incandescent lamp with carbide-containing filament according to The preamble of claim 1. It is in particular to Halogen incandescent lamps having a luminous body of TaC, or its Illuminant TaC contains as a component or coating.
  • halogens have also been used for the reaction with the carbon, see, for example, US Pat. No. 3,022,438.
  • the luminous element is here similarly fastened to a frame.
  • the carbon which evaporates from the filament reacts in the cold regions near the bulb wall with, for example, chlorine atoms to form compounds such as CCl 4 , thereby avoiding deposition of the carbon on the wall.
  • the carbon-halogen compounds are transported back by transport processes such as convection and diffusion in the direction of the mantle, wherein they decompose in the warmer area with release of the carbon.
  • the carbon can be re-attached to the helix.
  • an integral luminous body is used for this, in which the two power supply lines are a continuation of the coiled filament.
  • the filament and the power supply are made of a single wire.
  • the invention described herein relates in particular to lamps with reduced Piston volume, wherein the distance of the filament, in particular its luminous sections, from the inner wall of the piston is at most 18 mm.
  • the piston diameter itself is at most 35 mm, in particular in the range between 5 mm and 25 mm, preferably in the range between 8 mm and 15 mm.
  • pistons with such small dimensions especially with so little Diameter must be at risk of precipitation of solids on the bulb wall necessarily be countered.
  • these small piston diameters can depending on the color temperature of the coil, the blackening of the bulb over a dual cycle, as in the unpublished DE-A 103 56 651.1 is described, significantly reduced or avoided.
  • At least one power supply is characterized stabilized at least partially by a coating, in particular electrically is conductive, is sheathed.
  • both power supply lines are at least partially encased by a coil or a coil, in the following often Coil coil called.
  • An alternative is a compact sleeve made of electrical conductive material, in particular of metal such as tungsten or cermet, or made of carbon, which can also be electrically conductive as carbon filament lamps her known, but also graphite or diamond are suitable as a coating yourself.
  • the coating coils are made of a highly heat-resistant, non-carbide-containing material, in particular made of tungsten.
  • tantalum or molybdenum come into consideration.
  • Alternatives are electrically conductive Cermets as pods. Essential is a sufficiently low electrical resistance, the smaller, in particular significantly smaller, advantageously at least 50% smaller than that of the filament to be, so in this way the low breaking strength of simple filaments or incandescent filaments made of filament and disposals are constructed to improve. This is especially important if, disposals have the same diameter of a wire as the filament itself.
  • Carbide-containing filament just in the area of the pinch.
  • a carbide-containing filament in the broader sense is here in particular Also, a tantalum-containing, not just a tantalarbid ambiencer filament understood.
  • the luminous body is preferably a single-coiled wire, whose ends, which serve as a power supply, are uncoiled.
  • Typical diameter of the wire for the lamp are 50 to 300 microns.
  • Typical is the Filament formed from 5 to 20 turns.
  • a preferred slope factor to To achieve the highest possible stability of the filament is 1.4 to 2.8.
  • the coating spiral extends to the region of Power supply, which enters from the piston interior into the piston material.
  • the piston is closed by one or two bruises. This area is called a pinch edge.
  • the breakage sensitivity is straight especially high in the area of the squeezing edge, because here a high bending moment occurs.
  • the coating spiral extends over approximately at least 10%, preferably at least 50%, more preferably over at least 80% of the length the power supply in the interior of the piston, in particular over the entire length, because thereby a higher stability against distortion of the orientation of the Filament is achieved, the so-called. Wendelversch.
  • the coating spiral serves at the same time as a support.
  • IRC Infrared coating
  • a special advantage causes the application of halogen fillings, as with suitable Sizing not just a circular process for the material of the filament, but also for the material of the coating spiral to be started can.
  • Such fillings are known per se. In particular, it is It is a filling for a double cycle process, as it is in the unpublished DE-A 103 56 651.1 is described.
  • the invention also shows significant advantages over luminous bodies with massive power supply, so-called electrode holders, which so far almost exclusively used as a holder for carbide-containing filament.
  • the inventive Construction achieves a much higher impact resistance (it endures an acceleration of more than 100 g, in particular even more than 300 g) compared with a frame that uses electrode holder, and that has a impact resistance achieved by only about 40 g.
  • the power supply made of thin wire can absorb the impact energy better without breaking than comparatively thick and stiff electrode holder. The impact energy can thus through elastic suspension of the entire luminous body are degraded.
  • the construction according to the invention is much simpler than previous ones Constructions, because no quartz beam is needed and because no problematic contacts between the lamp and the power supply lines (typical is a contact by welding or clamping or Crimping) are required. These contacts often lead to damage the ends of the filament, the so-called Wendelab réellen. They also set also the impact resistance of the lamp down.
  • the material of the luminous body is preferably Ta, TaC or Ta 2 C.
  • carbides of Hf, Nb or Zr are also particularly suitable. Their melting points are either close to or even above the melting point of tungsten.
  • the present invention is particularly suitable for low-voltage lamps with a Voltage of at most 50 V, because the necessary luminous body relative can be made massive.
  • the wires may preferably have a diameter between 50 microns and 300 microns, especially at most 150 microns for general lighting purposes with maximum power of 100W.
  • thickness Wires up to 300 ⁇ m are used in photo-optical applications up to a power of 1000 W needed.
  • Particularly preferred is the invention for one-sided squeezed lamps used, since here the filament relatively short can be kept, which also reduces the susceptibility to breakage.
  • the coating spiral should TaC or W as preferred Material used.
  • the diameter of the wire of the coating spiral should be in particular between 30 and 95% of the diameter of the wire of the filament be.
  • the pitch factor of the cap coil should be between 1.0 and 2.0 lie.
  • the coating coil or sleeve may be made of electrically conductive cermet, Carbon or tungsten or a similar refractory metal.
  • FIG. 1 shows an incandescent lamp pinched on one side with a quartz glass bulb 1, a pinch 2, and inner power supply lines 3, the foils 4 in the pinch Connect 2 with a luminous body 5.
  • the filament is a simple coiled Wire from TaC.
  • the outer leads 6 are outside of the foils 4th stated.
  • the inner diameter of the piston is 5 mm.
  • the spiral ends are bent parallel to the lamp axis and over its entire length with a coating spiral 7 stabilized. It consists of a tightly wound tungsten wire.
  • FIG. 2 shows a light bulb squeezed on one side with a bulb made of tempered glass 1, a pinch 2, and inner power supply lines 3, which in the pinch 2 with a luminous body 6 'are connected.
  • the luminous element 6 ' is a helical one Wire with a core of rhenium and a layer of TaC on the surface. This The filament is more easily deformable than a filament made of carbide consists. In this case, the rhenium wire is usually first entangled, then a TaC layer is applied.
  • the outer power supply lines 5 are outside directly to the leads 3 'recognized and indeed in the area of the pinch. Of the inner diameter of the piston is 30 mm.
  • the luminous element is a Strand of carbon fibers coated with tantalum.
  • the TaC layer can e.g. by applying a tantalum layer by a CVD method or by Sputtering and subsequent carburization can be generated.
  • the carburization of Ta-layer can also only in lamp operation in a hydrocarbon Atmosphere to be performed.
  • the coating used here is a sleeve electrically conductive cermet, which covers about 80% of the length of the power supply lines and still reach into the bruise.
  • Such an electrically conductive Cermet is known for example from EP-A 887 840 or US-PS 4,155,758 and the prior art discussed therein.
  • a concrete example is one Cermet with a content of 50% molybdenum by volume, balance alumina.
  • FIG. 3 shows a double-sided squeezed incandescent lamp 20, also known as soffit, with a bulb of quartz glass 21, two pinch 24 and 25, leads 27, which are connected to a luminous element 26.
  • the filament 26 is simply coiled and consists of TaC.
  • the power supply lines 25 are made with a sleeve 30 Molybdenum sheaths and ends in sockets 28, as is well known in the art Pinching sitting.
  • the inner diameter of the piston is 15 mm.
  • the lamp preferably uses a luminous body of tantalum carbide, which preferably consists of a single coiled wire.
  • the piston is usually made of quartz glass or hard glass with a piston diameter between 5 mm and 35 mm, preferably between 8 mm and 15 mm.
  • the filling is mainly inert gas, in particular noble gas such as Ar, Kr or Xe, if necessary with the addition of small amounts (up to 15 mol%) of nitrogen.
  • noble gas such as Ar, Kr or Xe
  • filament material is also zirconium carbide, hafnium carbide, or an alloy of various carbides, e.g. in US-A 3,405,328.
  • a luminous body made of a carrier material such as e.g. one Rhenium wire as a core or a carbon fiber, this core coated with tantalum carbide or another metal carbide.
  • the guideline for the filling is a carbon content of 0.1 to 2 mol%.
  • Hydrogen content is at most the carbon content, preferably the two-bis Eightfold of the carbon content.
  • the halogen content is at most the Half, in particular one fifth to one tenth of the carbon content.
  • a guideline for the halogen content is 500 to 5000 ppm.
  • Decisive is the lower weight of the thinner filament, the one less impulse caused on the spiral outlets. This shows up in the comparison two filaments of the same wire, one of which is a filament six and the other filament has eight turns. The shorter wire with the smaller weight is significantly less prone to breakage.
  • the outer diameter of the sleeve corresponds to a maximum of twice the diameter the wire of the filament. The thinner the sleeve, the lower it is Weight.
  • a very specific filling consists of the following components: 1 bar (cold filling pressure) Kr + 1% C 2 H 4 + 1% H 2 + 0.05% CH 2 Br 2 .
  • the concentration data are mol%.

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  • Resistance Heating (AREA)
  • Vessels And Coating Films For Discharge Lamps (AREA)
  • Discharge Lamp (AREA)
EP05004050A 2004-03-23 2005-02-24 Lampe à incandescence avec un corps lumineux contenant de carbide Withdrawn EP1594158A3 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102004014211 2004-03-23
DE102004014211A DE102004014211A1 (de) 2004-03-23 2004-03-23 Glühlampe mit carbidhaltigem Leuchtkörper

Publications (2)

Publication Number Publication Date
EP1594158A2 true EP1594158A2 (fr) 2005-11-09
EP1594158A3 EP1594158A3 (fr) 2007-12-05

Family

ID=34933927

Family Applications (1)

Application Number Title Priority Date Filing Date
EP05004050A Withdrawn EP1594158A3 (fr) 2004-03-23 2005-02-24 Lampe à incandescence avec un corps lumineux contenant de carbide

Country Status (6)

Country Link
US (1) US7190117B2 (fr)
EP (1) EP1594158A3 (fr)
JP (1) JP4571879B2 (fr)
CN (1) CN100479091C (fr)
CA (1) CA2501740A1 (fr)
DE (1) DE102004014211A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8278823B2 (en) 2007-03-30 2012-10-02 General Electric Company Thermo-optically functional compositions, systems and methods of making

Families Citing this family (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
TWI270918B (en) * 2003-05-27 2007-01-11 Ip2H Ag Light source and method for supplying a transport function to a chemical element in a light source
DE102004034786A1 (de) * 2004-07-19 2006-03-16 Patent-Treuhand-Gesellschaft für elektrische Glühlampen mbH Glühlampe mit carbidhaltigem Leuchtkörper
DE102004034787A1 (de) * 2004-07-19 2006-03-16 Patent-Treuhand-Gesellschaft für elektrische Glühlampen mbH Glühlampe mit carbidhaltigem Leuchtkörper
US8044567B2 (en) 2006-03-31 2011-10-25 General Electric Company Light source incorporating a high temperature ceramic composite and gas phase for selective emission
US20070228986A1 (en) * 2006-03-31 2007-10-04 General Electric Company Light source incorporating a high temperature ceramic composite for selective emission
US7851985B2 (en) * 2006-03-31 2010-12-14 General Electric Company Article incorporating a high temperature ceramic composite for selective emission
US7722421B2 (en) * 2006-03-31 2010-05-25 General Electric Company High temperature ceramic composite for selective emission
DE102006020581A1 (de) * 2006-05-03 2007-11-08 Patent-Treuhand-Gesellschaft für elektrische Glühlampen mbH Zwei-Metall-Umspinnung
US20080237541A1 (en) * 2007-03-30 2008-10-02 General Electric Company Thermo-optically functional compositions, systems and methods of making
US20080237500A1 (en) * 2007-03-30 2008-10-02 General Electric Company Thermo-optically functional compositions, systems and methods of making
CN201508829U (zh) * 2009-08-27 2010-06-16 杨范文 一种灯丝
JP6189682B2 (ja) * 2013-08-29 2017-08-30 スタンレー電気株式会社 白熱電球およびフィラメント
US9305737B2 (en) 2014-08-29 2016-04-05 Elwha Llc Liquid filament for incandescent lights

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US3237284A (en) * 1962-02-05 1966-03-01 Polaroid Corp Method of forming carbide coated coiled filaments for lamps
US3524693A (en) * 1967-08-17 1970-08-18 Tokyo Shibaura Electric Co Method for assembling a carbide filament incandescent lamp
US5034656A (en) * 1989-09-26 1991-07-23 General Electric Company Tungsten halogen lamp including phosphorous and bromine
US5811934A (en) * 1994-06-13 1998-09-22 Patent-Treuhand-Gesellschaft Fur Elektrische Gluhlampen Mbh Electric incandescent halogen lamp with barrel-shaped bulb

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Publication number Priority date Publication date Assignee Title
US3237284A (en) * 1962-02-05 1966-03-01 Polaroid Corp Method of forming carbide coated coiled filaments for lamps
US3524693A (en) * 1967-08-17 1970-08-18 Tokyo Shibaura Electric Co Method for assembling a carbide filament incandescent lamp
US5034656A (en) * 1989-09-26 1991-07-23 General Electric Company Tungsten halogen lamp including phosphorous and bromine
US5811934A (en) * 1994-06-13 1998-09-22 Patent-Treuhand-Gesellschaft Fur Elektrische Gluhlampen Mbh Electric incandescent halogen lamp with barrel-shaped bulb

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8278823B2 (en) 2007-03-30 2012-10-02 General Electric Company Thermo-optically functional compositions, systems and methods of making

Also Published As

Publication number Publication date
EP1594158A3 (fr) 2007-12-05
CN100479091C (zh) 2009-04-15
DE102004014211A1 (de) 2005-10-13
US7190117B2 (en) 2007-03-13
CA2501740A1 (fr) 2005-09-23
US20050212422A1 (en) 2005-09-29
JP4571879B2 (ja) 2010-10-27
JP2005276841A (ja) 2005-10-06
CN1674214A (zh) 2005-09-28

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