GB574430A - Carburised filaments and methods for treating the same - Google Patents

Carburised filaments and methods for treating the same

Info

Publication number
GB574430A
GB574430A GB19380/43A GB1938043A GB574430A GB 574430 A GB574430 A GB 574430A GB 19380/43 A GB19380/43 A GB 19380/43A GB 1938043 A GB1938043 A GB 1938043A GB 574430 A GB574430 A GB 574430A
Authority
GB
United Kingdom
Prior art keywords
nov
filament
carburised
filaments
treating
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
GB19380/43A
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.)
STC PLC
Original Assignee
Standard Telephone and Cables PLC
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 Standard Telephone and Cables PLC filed Critical Standard Telephone and Cables PLC
Publication of GB574430A publication Critical patent/GB574430A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J1/00—Details of electrodes, of magnetic control means, of screens, or of the mounting or spacing thereof, common to two or more basic types of discharge tubes or lamps
    • H01J1/02—Main electrodes
    • H01J1/13—Solid thermionic cathodes
    • H01J1/14—Solid thermionic cathodes characterised by the material
    • 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
    • Y10T428/12438—Composite
    • 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
    • Y10T428/24—Structurally defined web or sheet [e.g., overall dimension, etc.]
    • Y10T428/24355—Continuous and nonuniform or irregular surface on layer or component [e.g., roofing, etc.]
    • Y10T428/24471—Crackled, crazed or slit
    • 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
    • Y10T428/29—Coated or structually defined flake, particle, cell, strand, strand portion, rod, filament, macroscopic fiber or mass thereof
    • Y10T428/2913—Rod, strand, filament or fiber
    • Y10T428/2918—Rod, strand, filament or fiber including free carbon or carbide or therewith [not as steel]
    • Y10T428/292—In coating or impregnation

Landscapes

  • Solid-Phase Diffusion Into Metallic Material Surfaces (AREA)

Abstract

574,430. Cathode materials and processing. STANDARD TELEPHONES & CABLES, Ltd. Nov. 19, 1943, No. 19380. Convention date, Nov. 23, 1942. Drawings to Specification. [Class 39 (i)] [Also in Group XXII] To reduce the brittleness of a carburized or thoriated filament or wire, particularly of tungsten, it is flashed, or otherwise heated, in an inert medium such as hydrogen or helium and whilst hot, and whilst still in the medium, it is bent, for example into its final shape. This layer thus becomes " crazed " or shows a finegrained fracture pattern and such surface fractures do not induce deep fractures such as would result in breakage of the filament, particularly if separation occurs between the metal core and the carburized layer.
GB19380/43A 1942-11-23 1943-11-19 Carburised filaments and methods for treating the same Expired GB574430A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US466567A US2450007A (en) 1942-11-23 1942-11-23 Carburized filament and method for treating the same

Publications (1)

Publication Number Publication Date
GB574430A true GB574430A (en) 1946-01-04

Family

ID=23852256

Family Applications (1)

Application Number Title Priority Date Filing Date
GB19380/43A Expired GB574430A (en) 1942-11-23 1943-11-19 Carburised filaments and methods for treating the same

Country Status (3)

Country Link
US (1) US2450007A (en)
BE (1) BE461800A (en)
GB (1) GB574430A (en)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2647067A (en) * 1949-09-10 1953-07-28 Eitel Mccullough Inc Electron emitter for electron tubes
US2674542A (en) * 1951-02-06 1954-04-06 Metal Hydrides Inc Method for producing hard surfaced titanium
US2819991A (en) * 1952-08-30 1958-01-14 Rca Corp Carburized thoriated tungsten electrode and method of enhancing its emissivity
BE535889A (en) * 1954-02-26
US3389977A (en) * 1964-08-05 1968-06-25 Texas Instruments Inc Tungsten carbide coated article of manufacture
US3494749A (en) * 1967-08-02 1970-02-10 Roman F Arnoldy Abrasion resistant plate
US4196368A (en) * 1977-09-07 1980-04-01 Eikonix Corporation Improving incandescent bulb efficiency
US7795792B2 (en) * 2006-02-08 2010-09-14 Varian Medical Systems, Inc. Cathode structures for X-ray tubes

Family Cites Families (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE214490C (en) *
US1851573A (en) * 1932-03-29 elsey
US716311A (en) * 1902-05-23 1902-12-16 Gen Electric Electrical conductor.
US1230869A (en) * 1907-06-14 1917-06-26 Gen Electric Method of making incandescent lamps.
US1593181A (en) * 1915-12-29 1926-07-20 Westinghouse Lamp Co Method of working refractory metals
US1663547A (en) * 1923-07-17 1928-03-27 Westinghouse Lamp Co Refractory material and the activation thereof
CH132146A (en) * 1927-03-09 1929-03-31 Erber Bernhard Electric incandescent lamp with a luminous element which at least partially consists of a carbide of a metal from the tantalum group.
US1862138A (en) * 1928-05-03 1932-06-07 Westinghouse Electric & Mfg Co Carbonized electrode and method of producing same
US1893286A (en) * 1928-05-25 1933-01-03 Westinghouse Lamp Co Method of carbonizing metals and alloys
US1908759A (en) * 1929-01-25 1933-05-16 Westinghouse Lamp Co Process of carbonizing metals
US2069407A (en) * 1930-07-29 1937-02-02 Gen Electric Thermionic cathode and process of activation
US2051828A (en) * 1933-10-31 1936-08-25 Gilby Wire Company Method of making carbonized nickel and nickel alloys
US2095105A (en) * 1935-10-01 1937-10-05 Gen Electric Process of treating metal surfaces
US2282097A (en) * 1940-03-29 1942-05-05 Warren G Taylor Nonemitting electrode structure
US2305555A (en) * 1940-09-26 1942-12-15 Meiville F Peters Electrical conductor

Also Published As

Publication number Publication date
BE461800A (en)
US2450007A (en) 1948-09-28

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