GB1241197A - Method of making non-sag filaments for electric lamps - Google Patents

Method of making non-sag filaments for electric lamps

Info

Publication number
GB1241197A
GB1241197A GB20030/69A GB2003069A GB1241197A GB 1241197 A GB1241197 A GB 1241197A GB 20030/69 A GB20030/69 A GB 20030/69A GB 2003069 A GB2003069 A GB 2003069A GB 1241197 A GB1241197 A GB 1241197A
Authority
GB
United Kingdom
Prior art keywords
wire
ingot
over
pulley
rod
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
GB20030/69A
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.)
GTE Sylvania Inc
Original Assignee
GTE Sylvania Inc
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 Sylvania Inc filed Critical GTE Sylvania Inc
Publication of GB1241197A publication Critical patent/GB1241197A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01K—ELECTRIC INCANDESCENT LAMPS
    • H01K3/00—Apparatus or processes adapted to the manufacture, installing, removal, or maintenance of incandescent lamps or parts thereof
    • H01K3/02—Manufacture of incandescent bodies
    • 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
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S75/00—Specialized metallurgical processes, compositions for use therein, consolidated metal powder compositions, and loose metal particulate mixtures
    • Y10S75/95—Consolidated metal powder compositions of >95% theoretical density, e.g. wrought
    • 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
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/12—All metal or with adjacent metals
    • Y10T428/12014—All metal or with adjacent metals having metal particles
    • 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
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/12—All metal or with adjacent metals
    • Y10T428/12333—Helical or with helical component
    • 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
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/12—All metal or with adjacent metals
    • Y10T428/12431—Foil or filament smaller than 6 mils

Abstract

1,241,197. Making wire for electric lamps. SYLVANIA ELECTRIC PRODUCTS Inc. 18 April, 1969 [18 April, 1968], No. 20030/69. Heading B3A. [Also in Division H1] A method of making wire for electric lamps includes preparing an ingot of a doped tungsten powder; sintering, swaging and drawing the ingot into a wire; and stretching the drawn wire to at least its elastic limit but below its ultimate tensile strength. An admixed blend of at least 96% tungsten powder and various dopants, e.g. 99% tungsten, 0À5% potassium chloride, 0À4% silica and 0À1% aluminium oxide, is pressed into an ingot. The pressed ingot is sintered at 2800‹ C. and then swaged at 1000‹ C., at least during the initial steps. A reduction in diameter of 10%-20% is achieved at each pass, in which the surface of the rod is hammered. The rod is annealed two or -three times at over 2000‹ C. during swaging. The wire so formed is then cold drawn with a reduction of area of 10%-30% at each pass. The drawn wire is looped over a first pulley, then over a second pulley of slightly greater diameter and fastened on to a take-up reel. The pulleys are rotated at the same speed and the wire is elongated by approximately the difference in diameter therebetween. The elongation may be increased by looping the wire more than once around each pulley. Coiled-coil filaments are made by primarily coiling the stretched wire around a molybdenum mandrel and annealing it. It is secondarily coiled on a larger mandrel and sintered. The molbydenum mandrel is removed by acid treatment, whereupon the filament is supported on a tungsten rod and flash stabilized at over 2000‹ C. for about 10 minutes to convert the wire structure from fibrous to crystalline. Finally mounting inserts -are attached to each end of the filament.
GB20030/69A 1968-04-18 1969-04-18 Method of making non-sag filaments for electric lamps Expired GB1241197A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US72221468A 1968-04-18 1968-04-18

Publications (1)

Publication Number Publication Date
GB1241197A true GB1241197A (en) 1971-07-28

Family

ID=24900927

Family Applications (1)

Application Number Title Priority Date Filing Date
GB20030/69A Expired GB1241197A (en) 1968-04-18 1969-04-18 Method of making non-sag filaments for electric lamps

Country Status (6)

Country Link
US (1) US3649224A (en)
BE (1) BE731694A (en)
DE (1) DE1918966A1 (en)
FR (1) FR2006455A1 (en)
GB (1) GB1241197A (en)
NL (1) NL6905994A (en)

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NL7406379A (en) * 1974-05-13 1975-11-17 Philips Nv HIGH PRESSURE DISCHARGE LAMP.
US5690666A (en) * 1992-11-18 1997-11-25 Target Therapeutics, Inc. Ultrasoft embolism coils and process for using them
US6171326B1 (en) 1998-08-27 2001-01-09 Micrus Corporation Three dimensional, low friction vasoocclusive coil, and method of manufacture
US8790363B2 (en) * 1995-04-20 2014-07-29 DePuy Synthes Products, LLC Three dimensional, low friction vasoocclusive coil, and method of manufacture
US5645558A (en) * 1995-04-20 1997-07-08 Medical University Of South Carolina Anatomically shaped vasoocclusive device and method of making the same
US6638291B1 (en) 1995-04-20 2003-10-28 Micrus Corporation Three dimensional, low friction vasoocclusive coil, and method of manufacture
US6168570B1 (en) 1997-12-05 2001-01-02 Micrus Corporation Micro-strand cable with enhanced radiopacity
US6241691B1 (en) 1997-12-05 2001-06-05 Micrus Corporation Coated superelastic stent
US6136015A (en) 1998-08-25 2000-10-24 Micrus Corporation Vasoocclusive coil
US6159165A (en) * 1997-12-05 2000-12-12 Micrus Corporation Three dimensional spherical micro-coils manufactured from radiopaque nickel-titanium microstrand
US6168615B1 (en) 1998-05-04 2001-01-02 Micrus Corporation Method and apparatus for occlusion and reinforcement of aneurysms
US6293960B1 (en) 1998-05-22 2001-09-25 Micrus Corporation Catheter with shape memory polymer distal tip for deployment of therapeutic devices
US6165194A (en) 1998-07-24 2000-12-26 Micrus Corporation Intravascular flow modifier and reinforcement device
US6656218B1 (en) * 1998-07-24 2003-12-02 Micrus Corporation Intravascular flow modifier and reinforcement device
US20020173839A1 (en) * 1998-07-24 2002-11-21 Leopold Eric W. Intravascular flow modifier and reinforcement device with connected segments
US6149664A (en) * 1998-08-27 2000-11-21 Micrus Corporation Shape memory pusher introducer for vasoocclusive devices
US6478773B1 (en) * 1998-12-21 2002-11-12 Micrus Corporation Apparatus for deployment of micro-coil using a catheter
US6500149B2 (en) 1998-08-31 2002-12-31 Deepak Gandhi Apparatus for deployment of micro-coil using a catheter
US6296622B1 (en) 1998-12-21 2001-10-02 Micrus Corporation Endoluminal device delivery system using axially recovering shape memory material
US6383204B1 (en) 1998-12-15 2002-05-07 Micrus Corporation Variable stiffness coil for vasoocclusive devices
US6102932A (en) 1998-12-15 2000-08-15 Micrus Corporation Intravascular device push wire delivery system
US6835185B2 (en) * 1998-12-21 2004-12-28 Micrus Corporation Intravascular device deployment mechanism incorporating mechanical detachment
US6165140A (en) 1998-12-28 2000-12-26 Micrus Corporation Composite guidewire
US6221066B1 (en) 1999-03-09 2001-04-24 Micrus Corporation Shape memory segmented detachable coil
US6352531B1 (en) 1999-03-24 2002-03-05 Micrus Corporation Variable stiffness optical fiber shaft
US6887235B2 (en) * 1999-03-24 2005-05-03 Micrus Corporation Variable stiffness heating catheter
US7740637B2 (en) * 2000-02-09 2010-06-22 Micrus Endovascular Corporation Apparatus and method for deployment of a therapeutic device using a catheter
US20060241682A1 (en) * 2003-12-08 2006-10-26 Kurz Daniel R Intravascular device push wire delivery system
DE102004043247B4 (en) * 2004-09-07 2010-04-15 Osram Gesellschaft mit beschränkter Haftung Electrode for high-pressure discharge lamps and high-pressure discharge lamp with such electrodes
US8535345B2 (en) * 2004-10-07 2013-09-17 DePuy Synthes Products, LLC Vasoocclusive coil with biplex windings to improve mechanical properties
CN101167156A (en) * 2005-04-27 2008-04-23 皇家飞利浦电子股份有限公司 Discharge lamp with electrode made of tungsten alloy comprising 3 wt% of rhenium
AT9340U1 (en) * 2005-12-23 2007-08-15 Plansee Metall Gmbh METHOD FOR PRODUCING A HIGH-SEALED SEMI-FINISHED OR COMPONENT
EP2182854B1 (en) * 2007-08-17 2019-12-11 Micrus Endovascular Corporation A twisted primary coil for vascular therapy
US20100069948A1 (en) * 2008-09-12 2010-03-18 Micrus Endovascular Corporation Self-expandable aneurysm filling device, system and method of placement

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3278281A (en) * 1957-09-13 1966-10-11 Westinghouse Electric Corp Thoriated tungsten filament or wire and method of making same

Also Published As

Publication number Publication date
US3649224A (en) 1972-03-14
NL6905994A (en) 1969-10-21
BE731694A (en) 1969-10-01
FR2006455A1 (en) 1969-12-26
DE1918966A1 (en) 1969-11-06

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