US3783328A - Halogen incandescent lamp - Google Patents

Halogen incandescent lamp Download PDF

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Publication number
US3783328A
US3783328A US00270730A US3783328DA US3783328A US 3783328 A US3783328 A US 3783328A US 00270730 A US00270730 A US 00270730A US 3783328D A US3783328D A US 3783328DA US 3783328 A US3783328 A US 3783328A
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United States
Prior art keywords
torr
fluorine
lamp
oxygen
tungsten
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Expired - Lifetime
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US00270730A
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English (en)
Inventor
G Neumann
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Osram GmbH
Original Assignee
Patent Treuhand Gesellschaft fuer Elektrische Gluehlampen mbH
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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01K—ELECTRIC INCANDESCENT LAMPS
    • H01K1/00—Details
    • H01K1/50—Selection of substances for gas fillings; Specified pressure thereof
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B20/00—Energy efficient lighting technologies, e.g. halogen lamps or gas discharge lamps

Definitions

  • ABSTRACT Halo en incandescent 1am s containin a tun sten fil- 30 F A g P g g I orelgn pp canon Pnonty Data ament and an inert fill gas.
  • the lamps also contain an Aug. 10, 1971 Germany P 21 40 087.3 equimolar quantity of oxygen and fluorine in the enve lope together with the inert gas.
  • 313/222 i 3 amount of each of the O yg n and fluorine is between [58 ⁇ Field of Search 313/222, 223 and 5 mm 9 Claims, 1 Drawing Figure 1 HALOGEN INCANDESCENT LAMP Incandescent lamps having tungsten filaments and being filled with an inert gas which also contains one or more of the halogen gases as an additive to the inert gas are well known.
  • a cyclic process is initiated which utilizes the halogen additive.
  • the halogen additive acts as a transport aid. Tungsten is evaporated from the filament and otherwise deposited on the envelope wall. This tungsten is converted at the operating temperature of the lamp to tungsten halide(s) and transported back to the filament.
  • incandescent lamps containing a halide additive to the fill gas should not be blackened throughout its service life and should deliver an approximately constant luminous efficacy during the service life.
  • U.S. Pat. No. 3,384,773 discloses such cyclic transport processes and discloses the use of the halogen gases, i.e., iodine, bromine and fluorine as well as gaseous mixtures thereof. It has been disclosed that when fluorine is added to the inert gas, the. fluorine may attack various components of the lamp such as the inner wall of the envelope and other internal components such as the filament supports. To avoid such attack it has been proposed that such components be protected by a coating which is resistant to gaseous fluorine, see U.S. Pat. No. 3,263,113.
  • the present invention provides gas filled incandescent lamps containing a closed light pervious envelope and a tungsten filament in said envelope.
  • the gas filling comprises an inert gas together with equimolar amounts of oxygen and fluorine.
  • the amounts of each of said fluorine. and oxygen in said inert gas is at a cold fill pressure of from 0.1 to 5 torr.
  • the fill pressure of the inert gas is in the order of mag nitude of from several hundred to several thousand torr.
  • the tungsten oxyfluoride having the composition WO F is formed in the lamp envelope.
  • the fluorine transport cycle occurs utilizing this compound for the transport of the tungsten fluoride evaporated from the filament.
  • the compound is stable and, accordingly, elemental fluorine is not present in the vicinity of the exposed internal lamp components.
  • Halogen incandescent projection lamps rated for 12 volts and 100 watts were filled with argon at a cold pressure of 3000 torr. Fluorine in an amount of 4 torr and oxygen in an amount of 4 torr were added to the iiiert zargonjiill. Tests 6? this tamaaaernmeanar the service life increased by about 50 percent percent when compared with conventional halogen incandescent lamps utilizing the bromine transport cycle. No attack on the cold lead-in wires by the fill gas of the oxygen and fluorine containing lamp was observed.
  • a tungsten filament l is positioned in the quartz glass lamp envelope 2 and is supported by wires 3,4.
  • the support wires 3,4 are connected to molybdenum foils 5,6 which are hermetically pinch-sealed into the quartz glass.
  • the molybdenum foils 5,6 are welded to terminals 7,8.
  • the lamp is operated at 12 volts with a power input of watts.
  • the lamp envelope contains an inert gas fill such as nitrogen or one of the rare gases, or a mixture thereof.
  • the lamp envelope also contains the equimolar amount of fluorine and oxygen.
  • the lamp envelope should be dimensioned so that during operation of the lamp, the wall temperature is at least 250C. Then it is not necessary to use quartz glass for the lamp envelope. Other known high melting point glass, hard glass, and even ordinary glass may be used for the lamp envelope.
  • the drawing depicts a single-ended halogen incandescent lamp. The invention is also applicable to halogen incandescent lamps of other designs such as, e.g., double-ended or socketed, or spherical lamps, and may be utilized for halogen incandescent lamps rated for voltage and wattage ranges other than those specified in the exemplified embodiment.
  • the present invention permits the utilization of the fluorine transport cycle in tungsten filament incandescent lamps. This permits taking advantage of this cycle which redeposits the gaseous tungsten at the hottest spots on the filament. This is accomplished without the attack on internal lamp elements which was a characteristic of the fluorine and- /r oxygen containing lamps of the prior art.
  • the lamp of the present invention contains an inert gas fill, preferably argon, in amounts between 600 torr and 6000 torr, and preferably between 1500 torr and 3500 torr.
  • the amounts (equimolar) of both oxygen and fluorine are preferably between about 3 torr and 4.5 torr.
  • a halogen incandescent lamp comprising a closed light pervious envelope
  • said envelope also containing in said inert gas, equimolar amounts of oxygen and fluorine.
  • the incandescent lamp of claim 2 containing about 4 torr of oxygen, and about 4 torr of fluorine.
  • the incandescent lampof claim 3 containing about 3000 torr of argon.
  • the incandescent lamp of claim 8 containing about 4 torr of oxygen and about 4 torr of fluorine.

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  • Discharge Lamp (AREA)
  • Manufacture, Treatment Of Glass Fibers (AREA)
US00270730A 1971-08-10 1972-07-11 Halogen incandescent lamp Expired - Lifetime US3783328A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE2140087A DE2140087A1 (de) 1971-08-10 1971-08-10 Halogengluehlampe

Publications (1)

Publication Number Publication Date
US3783328A true US3783328A (en) 1974-01-01

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ID=5816380

Family Applications (1)

Application Number Title Priority Date Filing Date
US00270730A Expired - Lifetime US3783328A (en) 1971-08-10 1972-07-11 Halogen incandescent lamp

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US (1) US3783328A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
DE (1) DE2140087A1 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
FR (1) FR2150021A5 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
GB (1) GB1385097A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4005324A (en) * 1976-03-17 1977-01-25 General Motors Corporation Tungsten-fluorine lamp with native retained oxygen therein and method of manufacture
US20040189208A1 (en) * 2003-03-31 2004-09-30 Matsushita Electric Industrial Co., Ltd. High-pressure mercury lamp, lamp unit, and image display device

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3263113A (en) * 1961-07-26 1966-07-26 Philips Corp Tungsten filament lamp comprising hexafluoride gas at partial pressure not exceeding 10 torrs
US3541378A (en) * 1968-01-08 1970-11-17 Westinghouse Electric Corp Tungsten oxyhalide incandescent lamps

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1270684B (de) * 1961-07-26 1968-06-20 Philips Nv Gasgefuellte Gluehlampe mit einem Wolfram-Gluehkoerper und Verfahren zu ihrer Herstellung
US3364376A (en) * 1965-09-21 1968-01-16 Gen Electric Iodine cycle incandescent lamp including carbon monoxide
GB1215689A (en) * 1968-11-05 1970-12-16 Westinghouse Electric Corp Method for dosing chlorine or fluorine into halogen-cycle-type incandescent lamps

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3263113A (en) * 1961-07-26 1966-07-26 Philips Corp Tungsten filament lamp comprising hexafluoride gas at partial pressure not exceeding 10 torrs
US3541378A (en) * 1968-01-08 1970-11-17 Westinghouse Electric Corp Tungsten oxyhalide incandescent lamps

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4005324A (en) * 1976-03-17 1977-01-25 General Motors Corporation Tungsten-fluorine lamp with native retained oxygen therein and method of manufacture
US20040189208A1 (en) * 2003-03-31 2004-09-30 Matsushita Electric Industrial Co., Ltd. High-pressure mercury lamp, lamp unit, and image display device
US7012374B2 (en) * 2003-03-31 2006-03-14 Matsushita Electric Industrial Co., Ltd. High-pressure mercury lamp, lamp unit, and image display device

Also Published As

Publication number Publication date
FR2150021A5 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) 1973-03-30
GB1385097A (en) 1975-02-26
DE2140087A1 (de) 1973-02-22
DE2140087C2 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) 1987-06-11

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