GB789826A - Improvements in or relating to oxide coated cathode supports - Google Patents

Improvements in or relating to oxide coated cathode supports

Info

Publication number
GB789826A
GB789826A GB17821/55A GB1782155A GB789826A GB 789826 A GB789826 A GB 789826A GB 17821/55 A GB17821/55 A GB 17821/55A GB 1782155 A GB1782155 A GB 1782155A GB 789826 A GB789826 A GB 789826A
Authority
GB
United Kingdom
Prior art keywords
carbide
coated cathode
relating
nickel
oxide coated
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
GB17821/55A
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.)
Thales SA
Original Assignee
CSF Compagnie Generale de Telegraphie sans Fil SA
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 CSF Compagnie Generale de Telegraphie sans Fil SA filed Critical CSF Compagnie Generale de Telegraphie sans Fil SA
Publication of GB789826A publication Critical patent/GB789826A/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
    • H01J1/20—Cathodes heated indirectly by an electric current; Cathodes heated by electron or ion bombardment
    • H01J1/26—Supports for the emissive 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
    • Y10T428/12014—All metal or with adjacent metals having metal particles
    • Y10T428/12028—Composite; i.e., plural, adjacent, spatially distinct metal components [e.g., layers, etc.]
    • Y10T428/12146—Nonmetal particles in a 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
    • Y10T428/12493—Composite; i.e., plural, adjacent, spatially distinct metal components [e.g., layers, joint, etc.]
    • Y10T428/12729—Group IIA metal-base 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
    • Y10T428/12493—Composite; i.e., plural, adjacent, spatially distinct metal components [e.g., layers, joint, etc.]
    • Y10T428/12771—Transition metal-base component
    • Y10T428/12861—Group VIII or IB metal-base component
    • Y10T428/12944—Ni-base component

Landscapes

  • Powder Metallurgy (AREA)

Abstract

The base for an oxide-coated cathode consists essentially of nickel containing from 0.1 to 10 per cent by weight of at least one refractory carbide. Tungsten carbide is preferred, but carbides of Mo, Cr, Ta, Nb, V, Hf, Zr, Ti, La, Y, Co, Pr, Th, U, Si, and Al are also mentioned. A suitable mixture is nickel powder of grain size 4 to 5m , and tungsten carbide powder of grain size 1m , mixed in the proportions 100:3 1/2 , and sintered at 1250 DEG C. for two hours. Alternatively the carbide powder may be added to melted nickel in vacuo. Carbide of larger grain may be used for low temperature cathodes.
GB17821/55A 1954-06-18 1955-06-20 Improvements in or relating to oxide coated cathode supports Expired GB789826A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR789826X 1954-06-18

Publications (1)

Publication Number Publication Date
GB789826A true GB789826A (en) 1958-01-29

Family

ID=9220325

Family Applications (1)

Application Number Title Priority Date Filing Date
GB17821/55A Expired GB789826A (en) 1954-06-18 1955-06-20 Improvements in or relating to oxide coated cathode supports

Country Status (2)

Country Link
US (1) US2924874A (en)
GB (1) GB789826A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8348907B2 (en) 2001-08-21 2013-01-08 D'antonio Consultants International Inc. Hypodermic injection system

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1819927A (en) * 1929-08-01 1931-08-18 Gen Electric Metal stencil
US2313227A (en) * 1938-08-04 1943-03-09 Metal Carbides Corp Roll for metal-rolling mills

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8348907B2 (en) 2001-08-21 2013-01-08 D'antonio Consultants International Inc. Hypodermic injection system

Also Published As

Publication number Publication date
US2924874A (en) 1960-02-16

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