GB782138A - Improvements in or relating to sintered cathodes - Google Patents

Improvements in or relating to sintered cathodes

Info

Publication number
GB782138A
GB782138A GB17468/55A GB1746855A GB782138A GB 782138 A GB782138 A GB 782138A GB 17468/55 A GB17468/55 A GB 17468/55A GB 1746855 A GB1746855 A GB 1746855A GB 782138 A GB782138 A GB 782138A
Authority
GB
United Kingdom
Prior art keywords
cathode
mixture
june
tungsten
compressed
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
GB17468/55A
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 GB782138A publication Critical patent/GB782138A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J9/00—Apparatus or processes specially adapted for the manufacture, installation, removal, maintenance of electric discharge tubes, discharge lamps, or parts thereof; Recovery of material from discharge tubes or lamps
    • H01J9/02—Manufacture of electrodes or electrode systems
    • H01J9/04—Manufacture of electrodes or electrode systems of thermionic cathodes
    • H01J9/042—Manufacture, activation of the emissive part
    • 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
    • Y10S428/00—Stock material or miscellaneous articles
    • Y10S428/922—Static electricity metal bleed-off metallic stock
    • Y10S428/923—Physical dimension
    • Y10S428/924—Composite
    • Y10S428/926—Thickness of individual layer specified
    • 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.]
    • Y10T428/12042—Porous 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
    • Y10T428/12014—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.]
    • Y10T428/1266—O, S, or organic compound in metal 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
    • Y10T428/12806—Refractory [Group IVB, VB, or VIB] metal-base component
    • Y10T428/12826—Group VIB metal-base component
    • Y10T428/1284—W-base component

Landscapes

  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Solid Thermionic Cathode (AREA)
  • Powder Metallurgy (AREA)

Abstract

782,138. Cathode material and processing. COMPAGNIE GENERALE DE TELEGRAPHIE SANS FIL. June 16, 1955 [June 16, 1954], No. 17468/55. Class 39(1). In manufacturing a cathode, a container 1 is filled with an emissive mixture 2 which is compressed, and then covered with a layer 4 of metallic powder of thickness only a fraction of the mixture 2, the whole being again compressed and sintered. A suitable mixture is barium tungstate+aluminium -'- tungsten in specified proportions. The final layer 4 is of tungsten powder, whose porosity can be controlled by the pressure applied. Times, temperatures, and grain sizes are specified. The cathode may then be cut along the line 5-5, and the surface planed and polished.
GB17468/55A 1954-06-16 1955-06-16 Improvements in or relating to sintered cathodes Expired GB782138A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR782138X 1954-06-16

Publications (1)

Publication Number Publication Date
GB782138A true GB782138A (en) 1957-09-04

Family

ID=9210902

Family Applications (1)

Application Number Title Priority Date Filing Date
GB17468/55A Expired GB782138A (en) 1954-06-16 1955-06-16 Improvements in or relating to sintered cathodes

Country Status (4)

Country Link
US (1) US2913812A (en)
DE (1) DE1068818B (en)
GB (1) GB782138A (en)
NL (1) NL102345C (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4767372A (en) * 1986-01-10 1988-08-30 Licentia Patent-Verwaltungs-Gmbh Process for the production of a porous pressed part

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE633204A (en) * 1962-06-04
US4837480A (en) * 1988-03-28 1989-06-06 Hughes Aircraft Company Simplified process for fabricating dispenser cathodes
DE4114856A1 (en) * 1991-05-07 1992-11-12 Licentia Gmbh STOCK CATHODE AND METHOD FOR THE PRODUCTION THEREOF

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1883898A (en) * 1928-12-14 1932-10-25 Westinghouse Electric & Mfg Co Thermionic cathode
AT164450B (en) * 1942-03-21 1949-11-10 Philips Nv Electron-emitting electrode for electrical discharge tubes and process for their manufacture
BE461663A (en) * 1943-05-01 1900-01-01
US2399773A (en) * 1943-09-02 1946-05-07 Sidney J Waintrob Method of making electrical rectifiers and the like
US2543439A (en) * 1945-05-02 1951-02-27 Edward A Coomes Method of manufacturing coated elements for electron tubes
NL69250C (en) * 1946-03-05
BE498869A (en) * 1949-10-25
AT176924B (en) * 1951-03-22 1953-12-10 Philips Nv A method for producing a cathode for an electrical discharge tube which contains a supply of alkaline earth metal compounds inside and the wall of which consists at least partially of a porous body produced by pressing and sintering, and a cathode produced by this method
BE526506A (en) * 1953-02-16

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4767372A (en) * 1986-01-10 1988-08-30 Licentia Patent-Verwaltungs-Gmbh Process for the production of a porous pressed part

Also Published As

Publication number Publication date
US2913812A (en) 1959-11-24
NL102345C (en)
DE1068818B (en) 1959-11-12

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