EP0354620A1 - Electric lamp with a light-absorbing coating - Google Patents
Electric lamp with a light-absorbing coating Download PDFInfo
- Publication number
- EP0354620A1 EP0354620A1 EP89202045A EP89202045A EP0354620A1 EP 0354620 A1 EP0354620 A1 EP 0354620A1 EP 89202045 A EP89202045 A EP 89202045A EP 89202045 A EP89202045 A EP 89202045A EP 0354620 A1 EP0354620 A1 EP 0354620A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- light
- coating
- lamp
- bulb
- absorbing 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- Withdrawn
Links
- 239000011248 coating agent Substances 0.000 title claims abstract description 24
- 238000000576 coating method Methods 0.000 title claims abstract description 24
- NUJOXMJBOLGQSY-UHFFFAOYSA-N manganese dioxide Chemical compound O=[Mn]=O NUJOXMJBOLGQSY-UHFFFAOYSA-N 0.000 claims abstract description 22
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 claims abstract description 14
- 239000003086 colorant Substances 0.000 claims abstract description 12
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 11
- SZVJSHCCFOBDDC-UHFFFAOYSA-N iron(II,III) oxide Inorganic materials O=[Fe]O[Fe]O[Fe]=O SZVJSHCCFOBDDC-UHFFFAOYSA-N 0.000 claims abstract description 11
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims abstract description 8
- 229910052710 silicon Inorganic materials 0.000 claims abstract description 7
- 239000010703 silicon Substances 0.000 claims abstract description 7
- 239000000203 mixture Substances 0.000 claims description 8
- 239000011230 binding agent Substances 0.000 claims description 7
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N Iron oxide Chemical compound [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 claims description 6
- 239000004408 titanium dioxide Substances 0.000 claims description 6
- BOTDANWDWHJENH-UHFFFAOYSA-N Tetraethyl orthosilicate Chemical compound CCO[Si](OCC)(OCC)OCC BOTDANWDWHJENH-UHFFFAOYSA-N 0.000 claims description 5
- 239000007767 bonding agent Substances 0.000 abstract 1
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 8
- 229910000428 cobalt oxide Inorganic materials 0.000 description 4
- IVMYJDGYRUAWML-UHFFFAOYSA-N cobalt(ii) oxide Chemical compound [Co]=O IVMYJDGYRUAWML-UHFFFAOYSA-N 0.000 description 4
- 229910052736 halogen Inorganic materials 0.000 description 4
- 235000012239 silicon dioxide Nutrition 0.000 description 4
- 150000002367 halogens Chemical class 0.000 description 3
- 238000010438 heat treatment Methods 0.000 description 3
- 239000000377 silicon dioxide Substances 0.000 description 3
- LYCAIKOWRPUZTN-UHFFFAOYSA-N Ethylene glycol Chemical compound OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 description 2
- 239000011521 glass Substances 0.000 description 2
- 235000013980 iron oxide Nutrition 0.000 description 2
- 229910052573 porcelain Inorganic materials 0.000 description 2
- POAOYUHQDCAZBD-UHFFFAOYSA-N 2-butoxyethanol Chemical compound CCCCOCCO POAOYUHQDCAZBD-UHFFFAOYSA-N 0.000 description 1
- MOMKYJPSVWEWPM-UHFFFAOYSA-N 4-(chloromethyl)-2-(4-methylphenyl)-1,3-thiazole Chemical compound C1=CC(C)=CC=C1C1=NC(CCl)=CS1 MOMKYJPSVWEWPM-UHFFFAOYSA-N 0.000 description 1
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 1
- PWHULOQIROXLJO-UHFFFAOYSA-N Manganese Chemical compound [Mn] PWHULOQIROXLJO-UHFFFAOYSA-N 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 239000003183 carcinogenic agent Substances 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000007598 dipping method Methods 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 150000002366 halogen compounds Chemical class 0.000 description 1
- WGCNASOHLSPBMP-UHFFFAOYSA-N hydroxyacetaldehyde Natural products OCC=O WGCNASOHLSPBMP-UHFFFAOYSA-N 0.000 description 1
- 238000007654 immersion Methods 0.000 description 1
- 239000011261 inert gas Substances 0.000 description 1
- 229910052748 manganese Inorganic materials 0.000 description 1
- 239000011572 manganese Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000001590 oxidative effect Effects 0.000 description 1
- SVMGVNXXUVNGRK-UHFFFAOYSA-N oxomethylideneiron Chemical compound O=C=[Fe] SVMGVNXXUVNGRK-UHFFFAOYSA-N 0.000 description 1
- 239000003973 paint Substances 0.000 description 1
- 239000000049 pigment Substances 0.000 description 1
- 239000010453 quartz Substances 0.000 description 1
- 230000003678 scratch resistant effect Effects 0.000 description 1
- 150000003377 silicon compounds Chemical class 0.000 description 1
- 239000011863 silicon-based powder Substances 0.000 description 1
- 235000019983 sodium metaphosphate Nutrition 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000000080 wetting agent Substances 0.000 description 1
Images
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J61/00—Gas-discharge or vapour-discharge lamps
- H01J61/02—Details
- H01J61/30—Vessels; Containers
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01K—ELECTRIC INCANDESCENT LAMPS
- H01K1/00—Details
- H01K1/28—Envelopes; Vessels
- H01K1/32—Envelopes; Vessels provided with coatings on the walls; Vessels or coatings thereon characterised by the material thereof
-
- 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
- H01J5/02—Vessels; Containers; Shields associated therewith; Vacuum locks
- H01J5/08—Vessels; Containers; Shields associated therewith; Vacuum locks provided with coatings on the walls thereof; Selection of materials for the coatings
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01K—ELECTRIC INCANDESCENT LAMPS
- H01K9/00—Lamps having two or more incandescent bodies separately heated
- H01K9/08—Lamps having two or more incandescent bodies separately heated to provide selectively different light effects, e.g. for automobile headlamp
Definitions
- the invention relates to an electric lamp, the bulb of which is partially provided with a light-absorbing coating which contains iron oxide and manganese dioxide as colorants, which are contained in a silicon-containing binder.
- the silicon-containing binders usually consist of an organic silicon compound, which converts to silicon dioxide when heated. This silicon dioxide then acts as a glass frit for binding the colorants.
- the light-absorbing coating on the lamp bulb is often used to shield part of the emitted light.
- the lamp bulb is thus locally impermeable to light.
- Such lamps are e.g. Halogen light bulbs or high-pressure discharge lamps for automotive lighting; the latter can be provided with an outer bulb.
- the light-absorbing coating can be applied both outside and inside to the lamp bulb or the outer bulb. Since such lamps are subjected to high thermal loads, their bulbs usually consist of hard or quartz glass.
- the light-absorbing coating should be corrosion-resistant, firmly adhering to the lamp bulb and scratch-resistant.
- the colorants consist of iron oxide, cobalt oxide and manganese dioxide.
- Cobalt oxide CO3O4 has been considered a carcinogenic substance for some time, so that its use for coating electric lamps is no longer an option.
- the lamp known from GB-PS 13 34 329 in which the bulb coating contains cobalt oxide and carbonyl iron as colorants.
- an ethyl silicate paint is provided for the coating, which contains silicon as a black pigment. This color is relatively difficult to make and too translucent,
- the lamp according to DE-OS 28 37 280 has a light-absorbing coating which is made of carbonyl iron and silicon powder without silicon-containing binders.
- the coating is baked at a temperature of 530 ° C.
- this color can only be used for certain piston crown shapes and only by means of a complicated immersion process.
- the invention is therefore based on the object of providing an electric lamp with a technologically simple to install, well-adhering light-absorbing coating which is sufficiently opaque without the use of cobalt oxide.
- the colorants can be present in the starting mixture in the following proportions by weight: Magnetite: 14 to 20% Manganese dioxide: 8 to 16% Carbonyl iron: 14 to 21% Titanium dioxide: 5 to 12%.
- the starting mixture contains ethyl silicate as a binder, a firmly adhering coating is obtained.
- the lamp is a 12 V, 55 W halogen lamp for use in a parabolic reflector of a motor vehicle headlight.
- the lamp has a bulb 1 made of quartz or hard glass. Inside the bulb 1 there are two incandescent filaments 2 and 3, of which the main incandescent filament 2 is arranged at the focal point of the parabolic reflector, while the low-beam incandescent filament 3 is partially surrounded by a dimming cap 4.
- the bulb 1 is filled with an inert gas and a halogen compound, so that a tungsten-halogen circuit can arise during operation of the lamp.
- the lamp bulb 1 is seated in a base 5 with connecting lugs 6.
- the dome 7 of the lamp bulb 1 with the pump stem melting 8 is provided on the outside with a light-absorbing coating 9.
- These Coating contains magnetite, manganese dioxide, carbonyl iron and titanium dioxide as colorants, which are contained in a silicon-containing binder.
- the coating 9 can consist of the following starting mixture: amount material 430 g Titanium dioxide 690 g Manganese IV oxide 70 g Sodium metaphosphate 1900 ml Ethyl silicate solution 150 ml Monobutyl glycol ether 80 ml Glycol 500 ml Ethanol denatured 96% 930 g Carbonyl iron EN 8 900 g Magnetite If necessary, a wetting agent can be added.
- All substances are placed together with about 3 kg of porcelain balls with a diameter of 13 mm in a 5 liter porcelain ball mill and milled therein on a roller table at 60 revolutions per minute for 18 hours.
- the finished mixture is then sieved through a metal gauze sieve with a mesh size of 0.1 mm. The mixture is then ready for use.
- the lamp bulbs 1 are dipped with this tip 7 into this mixture, then dried and subjected to a heat treatment by heating the bulbs with the applied coating 9 in a drying oven and the lamps are operated by applying a 12 V voltage source.
- the blackened tips 7 are then heated to red heat (1000 ° C.) by means of a ring burner with an oxidizing flame.
- red heat 1000 ° C.
- the ethyl silicate is converted into silicon dioxide and the iron powder is oxidized and baked so that the coating adheres firmly to the piston.
- the coating 9 has a thickness of approximately 0.005 mm.
- the light transmission values of the tips of the lamps produced in this way correspond approximately to those achieved by dipping twice with the colors previously used on an industrial scale.
Landscapes
- Vessels And Coating Films For Discharge Lamps (AREA)
- Non-Portable Lighting Devices Or Systems Thereof (AREA)
- Common Detailed Techniques For Electron Tubes Or Discharge Tubes (AREA)
- Glass Compositions (AREA)
- Paints Or Removers (AREA)
- Adhesives Or Adhesive Processes (AREA)
Abstract
Description
Die Erfindung bezieht sich auf eine elektrische Lampe, deren Kolben teilweise mit einer lichtabsorbierenden Beschichtung versehen ist, die als Farbmittel Eisenoxid und Mangandioxid enthält, welche in einem siliziumhaltigen Bindemittel enthalten sind. Die siliziumhaltigen Bindemittel bestehen üblicherweise aus einer organischen Siliziumverbindung, die sich bei Erhitzung in Siliziumdioxid umwandelt. Dieses Siliziumdioxid wirkt dann als Glasfritte zum Binden der Farbmittel.The invention relates to an electric lamp, the bulb of which is partially provided with a light-absorbing coating which contains iron oxide and manganese dioxide as colorants, which are contained in a silicon-containing binder. The silicon-containing binders usually consist of an organic silicon compound, which converts to silicon dioxide when heated. This silicon dioxide then acts as a glass frit for binding the colorants.
Bei elektrischen Lampen dient die lichtabsorbierende Beschichtung auf dem Lampenkolben vielfach zur Abschirmung eines Teils des abgestrahlten Lichtes. Der Lampenkolben wird damit örtlich für Licht undurchlässig. Derartige Lampen sind z.B. für Kraftfahrzeugbeleuchtung bestimmte Halogenglühlampen oder Hochdruckentladungslampen; letztere können mit einem Außenkolben versehen sein. Die lichtabsorbierende Beschichtung kann sowohl außen als auch innen auf den Lampenkolben bzw. den Außenkolben aufgebracht werden. Da derartige Lampen thermisch hoch belastet werden, besteht deren Kolben üblicherweise aus Hart- oder Quarzglas. Die lichtabsorbierende Beschichtung soll korrosionsbeständig, fest am Lampenkolben haftend und kratzfest sein.In the case of electric lamps, the light-absorbing coating on the lamp bulb is often used to shield part of the emitted light. The lamp bulb is thus locally impermeable to light. Such lamps are e.g. Halogen light bulbs or high-pressure discharge lamps for automotive lighting; the latter can be provided with an outer bulb. The light-absorbing coating can be applied both outside and inside to the lamp bulb or the outer bulb. Since such lamps are subjected to high thermal loads, their bulbs usually consist of hard or quartz glass. The light-absorbing coating should be corrosion-resistant, firmly adhering to the lamp bulb and scratch-resistant.
Bei einer aus der GB-PS 14 22 491 bekannten elektrischen Lampe dieser Art bestehen die Farbmittel aus Eisenoxid, Kobaltoxid und Mangandioxid. Kobaltoxid CO₃O₄ gilt aber seit einiger Zeit als krebserregender Stoff, so daß seine Verwendung zur Beschichtung elektrischer Lampen nicht mehr in Frage kommt.In a known from GB-PS 14 22 491 electric lamp of this type, the colorants consist of iron oxide, cobalt oxide and manganese dioxide. Cobalt oxide CO₃O₄ has been considered a carcinogenic substance for some time, so that its use for coating electric lamps is no longer an option.
Ahnliches gilt für die aus der GB-PS 13 34 329 bekannte Lampe, bei der die Kolbenbeschichtung als Farbmitttel Kobaltoxid und Carbonyleisen enthält.The same applies to the lamp known from GB-PS 13 34 329, in which the bulb coating contains cobalt oxide and carbonyl iron as colorants.
Bei der Lampe nach der DE-PS 19 09 394 ist für die Beschichtung eine Ethylsilikatfarbe vorgesehen, die Silizium als schwarzes Pigment enthält. Diese Farbe ist relativ schwierig herzustellen und zu lichtdurchlässig,In the lamp according to DE-PS 19 09 394, an ethyl silicate paint is provided for the coating, which contains silicon as a black pigment. This color is relatively difficult to make and too translucent,
Die Lampe nach der DE-OS 28 37 280 besitzt eine lichtabsorbierende Beschichtung, welche aus Carbonyleisen und Siliziumpulver ohne siliziumhaltige Bindemittel hergestellt ist. Die Beschichtung wird bei einer Temperatur von 530°C eingebrannt. Es hat sich jedoch gezeigt, daß diese Farbe nur für bestimmte Kolbenkuppenformen und nur mittels eines komplizierten Tauchprozesses angewendet werden kann.The lamp according to DE-OS 28 37 280 has a light-absorbing coating which is made of carbonyl iron and silicon powder without silicon-containing binders. The coating is baked at a temperature of 530 ° C. However, it has been shown that this color can only be used for certain piston crown shapes and only by means of a complicated immersion process.
Der Erfindung liegt daher die Aufgabe zugrunde, eine elektrische Lampe mit einer technologisch einfach anzubringenden, gut haftenden lichtabsorbierenden Beschichtung zu schaffen, die ohne Verwendung von Kobaltoxid ausreichend lichtundurchlässig ist.The invention is therefore based on the object of providing an electric lamp with a technologically simple to install, well-adhering light-absorbing coating which is sufficiently opaque without the use of cobalt oxide.
Diese Aufgabe wird bei einer elektrischen Lampe eingangs erwähnter Art gemäß der Erfindung dadurch gelöst, daß die Beschichtung als Farbmittel Magnetit, Mangandioxid, Carbonyleisen und Titandioxid enthält.This object is achieved in an electric lamp of the type mentioned at the outset according to the invention in that the coating contains magnetite, manganese dioxide, carbonyl iron and titanium dioxide as colorants.
Überraschenderweise hat sich gezeigt, daß durch Zusatz von an sich weißem Titandioxid die Lichtundurchlässigkeit der Beschichtung erheblich verbessert werden kann.Surprisingly, it has been found that the opacity of the coating can be considerably improved by adding titanium dioxide which is white per se.
Gemäß einer Weiterbildung nach der Erfindung können die Farbmittel in der Ausgangsmischung in folgenden Gewichtsanteilen vorhanden sein:
Magnetit : 14 bis 20 %
Mangandioxid : 8 bis 16 %
Carbonyleisen : 14 bis 21 %
Titandioxid : 5 bis 12 %.According to a development according to the invention, the colorants can be present in the starting mixture in the following proportions by weight:
Magnetite: 14 to 20%
Manganese dioxide: 8 to 16%
Carbonyl iron: 14 to 21%
Titanium dioxide: 5 to 12%.
Wenn die Ausgangsmischung gemäß einer Ausführungsform nach der Erfindung als Bindemittel Ethylsilikat enthält, wird eine fest haftende Beschichtung erhalten.If, according to one embodiment according to the invention, the starting mixture contains ethyl silicate as a binder, a firmly adhering coating is obtained.
Ein Ausführungsbeispiel nach der Erfindung wird nunmehr anhand der Zeichnung näher beschrieben.
- Die Figur zeigt die Seitenansicht einer Halogenglühlampe für Kraftfahrzeugscheinwerfer.
- The figure shows the side view of a halogen light bulb for motor vehicle headlights.
Es handelt sich um eine 12 V, 55 W Halogenglühlampe zur Anwendung in einem parabolischen Reflektor eines Kraftfahrzeugscheinwerfers. Die Lampe besitzt einen Kolben 1 aus Quarz- oder Hartglas. Innerhalb des Kolbens 1 befinden sich zwei Glühwendel 2 und 3, von denen die Hauptglühwendel 2 im Brennpunkt des parabolischen Reflektors angeordnet wird, während die Abblendglühwendel 3 teilweise von einer Abblendkappe 4 umgeben ist. Der Kolben 1 ist gefüllt mit einem Inertgas und einer Halogenverbindung, so daß im Betrieb der Lampe ein Wolfram-Halogen-Kreislauf entstehen kann. Der Lampenkolben 1 sitzt in einem Sockel 5 mit Anschlußfahnen 6.It is a 12 V, 55 W halogen lamp for use in a parabolic reflector of a motor vehicle headlight. The lamp has a bulb 1 made of quartz or hard glass. Inside the bulb 1 there are two
Die Kuppe 7 des Lampenkolbens 1 mit der Pumpstengelabschmelzung 8 ist auf der Außenseite mit einer lichtabsorbierenden Beschichtung 9 versehen. Diese Beschichtung enthält als Farbmittel Magnetit, Mangandioxid, Carbonyleisen und Titandioxid, welche in einem siliziumhaltigen Bindemittel enthalten sind. Die Beschichtung 9 kann aus folgender Ausgangsmischung bestehen:
Alle Substanzen werden zusammen mit etwa 3 kg Porzellankugeln mit einem Durchmesser von 13 mm in eine 5 Liter Porzellankugelmühle gegeben und darin 18 Stunden auf einem Rolltisch mit 60 Umdrehungen pro Minute gemahlen. Die fertige Mischung wird anschließend über ein Metallgazesieb mit einer Maschenweite von 0,1 mm gesiebt. Die Mischung ist dann fertig zum Gebrauch.All substances are placed together with about 3 kg of porcelain balls with a diameter of 13 mm in a 5 liter porcelain ball mill and milled therein on a roller table at 60 revolutions per minute for 18 hours. The finished mixture is then sieved through a metal gauze sieve with a mesh size of 0.1 mm. The mixture is then ready for use.
Die Lampenkolben 1 werden mit ihrer Kuppe 7 in diese Mischung eingetaucht, dann getrocknet und einer Wärmebehandlung unterzogen, indem die Kolben mit der aufgebrachten Beschichtung 9 in einem Trockenofen erhitzt und die Lampen durch Anlegen an eine 12 V-Spannungsquelle betrieben werden. Anschließend werden die geschwärzten Kuppen 7 mittels Ringbrenner mit oxidierender Flamme auf Rotglut ( 1000°C) erhitzt. Bei dieser Wärmebehandlung wird das Ethylsilikat in Siliziumdioxid umgewandelt und das Eisenpulver oxidiert und eingebrannt, so daß die Beschichtung fest auf dem Kolben haftet. Die Beschichtung 9 hat eine Dicke von etwa 0,005 mm.The lamp bulbs 1 are dipped with this tip 7 into this mixture, then dried and subjected to a heat treatment by heating the bulbs with the applied coating 9 in a drying oven and the lamps are operated by applying a 12 V voltage source. The blackened tips 7 are then heated to red heat (1000 ° C.) by means of a ring burner with an oxidizing flame. In this heat treatment, the ethyl silicate is converted into silicon dioxide and the iron powder is oxidized and baked so that the coating adheres firmly to the piston. The coating 9 has a thickness of approximately 0.005 mm.
Die Lichtdurchlässigkeitswerte der mit der schwarzen Beschichtung versehenen Kuppen der so hergestellten Lampen entsprechen etwa denen, die durch zweimaliges Tauchen mit den bisher großtechnisch verwendeten Farben erreicht wurden.The light transmission values of the tips of the lamps produced in this way, which are provided with the black coating, correspond approximately to those achieved by dipping twice with the colors previously used on an industrial scale.
Claims (3)
dadurch gekennzeichnet, daß die Beschichtung als Farbmittel Magnetit (Fe₃O₄), Mangandioxid (MnO₂), Carbonyleisen (Fe) und Titandioxid (TiO₂) enthält.1. Electric lamp, the bulb of which is partially provided with a light-absorbing coating which contains iron oxide and manganese dioxide as colorants, which are contained in a silicon-containing binder,
characterized in that the coating contains magnetite (Fe₃O₄), manganese dioxide (MnO₂), carbonyl iron (Fe) and titanium dioxide (TiO₂) as colorants.
dadurch gekennzeichnet, daß die Farbmittel in der Ausgangsmischung in folgenden Gewichtsanteilen vorhanden sind:
Magnetit : 14 bis 20 %
Mangandioxid : 8 bis 16 %
Carbonyleisen : 14 bis 21 %
Titandioxid : 5 bis 12 %2. Lamp according to claim 1,
characterized in that the colorants are present in the starting mixture in the following proportions by weight:
Magnetite: 14 to 20%
Manganese dioxide: 8 to 16%
Carbonyl iron: 14 to 21%
Titanium dioxide: 5 to 12%
dadurch gekennzeichnet, daß die Ausgangsmischung als Bindemittel Ethylsilikat enthält.3. Lamp according to claim 1 or 2,
characterized in that the starting mixture contains ethyl silicate as a binder.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE3827451A DE3827451C1 (en) | 1988-08-12 | 1988-08-12 | |
| DE3827451 | 1988-08-12 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP0354620A1 true EP0354620A1 (en) | 1990-02-14 |
Family
ID=6360758
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP89202045A Withdrawn EP0354620A1 (en) | 1988-08-12 | 1989-08-07 | Electric lamp with a light-absorbing coating |
Country Status (7)
| Country | Link |
|---|---|
| EP (1) | EP0354620A1 (en) |
| JP (1) | JPH0287456A (en) |
| KR (1) | KR900003957A (en) |
| CN (1) | CN1040458A (en) |
| DD (1) | DD284097A5 (en) |
| DE (1) | DE3827451C1 (en) |
| HU (1) | HU201422B (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0503429A3 (en) * | 1991-03-14 | 1992-12-23 | Patent-Treuhand-Gesellschaft Fuer Elektrische Gluehlampen Mbh | Single-cap lamp |
| WO1996015548A1 (en) * | 1994-11-10 | 1996-05-23 | Philips Electronics N.V. | Electric lamp |
| WO1999049498A1 (en) * | 1998-03-26 | 1999-09-30 | Koninklijke Philips Electronics N.V. | Electric lamp |
| EP1083588A1 (en) * | 1999-09-01 | 2001-03-14 | Philips Corporate Intellectual Property GmbH | Coloured signal light with an iron oxide pigment coated lamp |
| US7740900B2 (en) | 2001-09-13 | 2010-06-22 | Koninklijke Philips Electronics N.V. | Method of preparing a light-absorbing coating |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100703248B1 (en) * | 1999-09-13 | 2007-04-03 | 코닌클리즈케 필립스 일렉트로닉스 엔.브이. | Electric lamp |
| DE10040887A1 (en) * | 2000-08-18 | 2001-08-30 | Philips Corp Intellectual Pty | Halogen incandescent lamp for motor vehicle has elongated bulb closed at one end, vacuum tight compression at other end, incandescent element, base, current leads, optical absorption filter |
| EP1921664A1 (en) | 2006-11-09 | 2008-05-14 | Koninklijke Philips Electronics N.V. | Electric lamp with light-absorbing coating, precursor suspension for such a coating and method of making such a lamp |
| CN105531073B (en) | 2013-06-28 | 2018-08-28 | 通快激光与系统工程有限公司 | Method for mechanical processing, in particular for mechanical welding processing, and control device for regulating device of process gas supply |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2034987A (en) * | 1931-06-12 | 1936-03-24 | Morita Kikujiro | Process for coating glass sheets |
| CH384147A (en) * | 1957-12-10 | 1964-11-15 | Jenaer Glaswerk Schott & Gen | Process for the production of light-absorbing layers |
| DE2136012A1 (en) * | 1971-07-19 | 1973-02-01 | Patra Patent Treuhand | ELECTRIC LAMP WITH LIGHT COVERING COVER |
| GB1422491A (en) * | 1973-01-15 | 1976-01-28 | Narva Veb | Electric lamp with light-impermeable coating |
| DE3043464A1 (en) * | 1979-11-23 | 1981-06-04 | Gte Products Corp., Wilmington, Del. | LAMP WITH OPAQUE COATING |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2837280A1 (en) * | 1978-08-25 | 1980-03-06 | Patra Patent Treuhand | ELECTRIC LAMP WITH LIGHT COVERING COVER |
-
1988
- 1988-08-12 DE DE3827451A patent/DE3827451C1/de not_active Expired
-
1989
- 1989-08-07 EP EP89202045A patent/EP0354620A1/en not_active Withdrawn
- 1989-08-09 HU HU894076A patent/HU201422B/en not_active IP Right Cessation
- 1989-08-09 JP JP1204903A patent/JPH0287456A/en active Pending
- 1989-08-09 DD DD89331615A patent/DD284097A5/en not_active IP Right Cessation
- 1989-08-09 CN CN89105638A patent/CN1040458A/en active Pending
- 1989-08-09 KR KR1019890011310A patent/KR900003957A/en not_active Withdrawn
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2034987A (en) * | 1931-06-12 | 1936-03-24 | Morita Kikujiro | Process for coating glass sheets |
| CH384147A (en) * | 1957-12-10 | 1964-11-15 | Jenaer Glaswerk Schott & Gen | Process for the production of light-absorbing layers |
| DE2136012A1 (en) * | 1971-07-19 | 1973-02-01 | Patra Patent Treuhand | ELECTRIC LAMP WITH LIGHT COVERING COVER |
| GB1422491A (en) * | 1973-01-15 | 1976-01-28 | Narva Veb | Electric lamp with light-impermeable coating |
| DE3043464A1 (en) * | 1979-11-23 | 1981-06-04 | Gte Products Corp., Wilmington, Del. | LAMP WITH OPAQUE COATING |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0503429A3 (en) * | 1991-03-14 | 1992-12-23 | Patent-Treuhand-Gesellschaft Fuer Elektrische Gluehlampen Mbh | Single-cap lamp |
| WO1996015548A1 (en) * | 1994-11-10 | 1996-05-23 | Philips Electronics N.V. | Electric lamp |
| US5619102A (en) * | 1994-11-10 | 1997-04-08 | U.S. Philips Corporation | Electric lamp |
| CN1089481C (en) * | 1994-11-10 | 2002-08-21 | 皇家菲利浦电子有限公司 | Electric lamp |
| WO1999049498A1 (en) * | 1998-03-26 | 1999-09-30 | Koninklijke Philips Electronics N.V. | Electric lamp |
| US6270237B1 (en) | 1998-03-26 | 2001-08-07 | U.S. Philips Corporation | Electric lamp with an anti-reflecting layer |
| EP1083588A1 (en) * | 1999-09-01 | 2001-03-14 | Philips Corporate Intellectual Property GmbH | Coloured signal light with an iron oxide pigment coated lamp |
| US7740900B2 (en) | 2001-09-13 | 2010-06-22 | Koninklijke Philips Electronics N.V. | Method of preparing a light-absorbing coating |
Also Published As
| Publication number | Publication date |
|---|---|
| DD284097A5 (en) | 1990-10-31 |
| CN1040458A (en) | 1990-03-14 |
| JPH0287456A (en) | 1990-03-28 |
| HU201422B (en) | 1990-10-28 |
| HUT50533A (en) | 1990-02-28 |
| DE3827451C1 (en) | 1989-10-12 |
| KR900003957A (en) | 1990-03-27 |
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