GB568962A - Improvements in or relating to cathodes for electron discharge devices - Google Patents

Improvements in or relating to cathodes for electron discharge devices

Info

Publication number
GB568962A
GB568962A GB1636243A GB1636243A GB568962A GB 568962 A GB568962 A GB 568962A GB 1636243 A GB1636243 A GB 1636243A GB 1636243 A GB1636243 A GB 1636243A GB 568962 A GB568962 A GB 568962A
Authority
GB
United Kingdom
Prior art keywords
particles
cathodes
relating
improvements
discharge devices
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
GB1636243A
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.)
BAE Systems Electronics Ltd
Original Assignee
Marconis Wireless Telegraph Co Ltd
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
Priority to US460964A priority Critical patent/US2339392A/en
Application filed by Marconis Wireless Telegraph Co Ltd filed Critical Marconis Wireless Telegraph Co Ltd
Publication of GB568962A publication Critical patent/GB568962A/en
Expired legal-status Critical Current

Links

Classifications

    • HELECTRICITY
    • H01BASIC ELECTRIC ELEMENTS
    • H01JELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J9/00Apparatus 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
    • H01J9/02Manufacture of electrodes or electrode systems
    • H01J9/04Manufacture of electrodes or electrode systems of thermionic cathodes
    • H01J9/042Manufacture, activation of the emissive part
    • HELECTRICITY
    • H01BASIC ELECTRIC ELEMENTS
    • H01JELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J1/00Details 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
    • H01J1/02Main electrodes
    • H01J1/13Solid thermionic cathodes
    • H01J1/14Solid thermionic cathodes characterised by the material
    • YGENERAL 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
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10STECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S428/00Stock material or miscellaneous articles
    • Y10S428/922Static electricity metal bleed-off metallic stock
    • Y10S428/923Physical dimension
    • Y10S428/924Composite
    • Y10S428/926Thickness of individual layer specified
    • YGENERAL 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
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10STECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S428/00Stock material or miscellaneous articles
    • Y10S428/922Static electricity metal bleed-off metallic stock
    • Y10S428/9335Product by special process
    • Y10S428/939Molten or fused coating
    • YGENERAL 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
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10TTECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00Stock material or miscellaneous articles
    • Y10T428/12All metal or with adjacent metals
    • Y10T428/12014All metal or with adjacent metals having metal particles
    • Y10T428/12028Composite; i.e., plural, adjacent, spatially distinct metal components [e.g., layers, etc.]
    • Y10T428/12063Nonparticulate metal component
    • Y10T428/12139Nonmetal particles in particulate component

Abstract

568,962. Electrode materials. MARCONI'S WIRELESS TELEGRAPH CO., Ltd. Oct. 6, 1943, No. 16362. Convention date, Oct. 6, 1942. [Class 39 (i)] A cathode is made by coating a metal base with a thin layer of metallic tungsten particles, heating these to sintering temperature and then adding a coating of thorium oxide particles and heating in vacuum to cause the latter to adhere to the tungsten particles. A layer of molybdenum particles' may be sintered on to the tungsten layer before the thorium oxide is added. The metal base may be tantalum or molybdenum.
GB1636243A 1942-10-06 1943-10-06 Improvements in or relating to cathodes for electron discharge devices Expired GB568962A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US460964A US2339392A (en) 1942-10-06 1942-10-06 Cathode

Publications (1)

Publication Number Publication Date
GB568962A true GB568962A (en) 1945-04-27

Family

ID=23830719

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1636243A Expired GB568962A (en) 1942-10-06 1943-10-06 Improvements in or relating to cathodes for electron discharge devices

Country Status (2)

Country Link
US (1) US2339392A (en)
GB (1) GB568962A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2119565A (en) * 1982-04-23 1983-11-16 Raytheon Co Method of making a cathode electrode and product of such method

Families Citing this family (20)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2427592A (en) * 1943-07-31 1947-09-16 Rca Corp Thorium compound protective coatings for reflecting surfaces
US2557372A (en) * 1948-02-21 1951-06-19 Westinghouse Electric Corp Manufacture of thoria cathodes
US2524001A (en) * 1948-05-19 1950-09-26 Raytheon Mfg Co Compressed cathode support structure
BE491070A (en) * 1948-09-14
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
US2755199A (en) * 1951-02-19 1956-07-17 Kellogg M W Co Hard coated composite and method of forming
DE1009727B (en) * 1953-01-10 1957-06-06 Deutsche Elektronik Gmbh A method for producing solid, guthaftender emission layers of thorium oxide on a Traegermetall of tungsten or molybdenum
DE1029943B (en) * 1953-12-22 1958-05-14 Siemens Ag Cathode for electrical Entladungsgefaesse
US3041209A (en) * 1955-06-28 1962-06-26 Gen Electric Method of making a thermionic cathode
US2996795A (en) * 1955-06-28 1961-08-22 Gen Electric Thermionic cathodes and methods of making
US3023490A (en) * 1955-11-25 1962-03-06 Dawson Armoring Company Armored metal articles with a thin hard film made in situ and conforming to the exact contour of the underlying surface
US2847328A (en) * 1957-03-04 1958-08-12 James E Cline Method of making thorium oxide cathodes
US3075066A (en) * 1957-12-03 1963-01-22 Union Carbide Corp Article of manufacture and method of making same
US3066407A (en) * 1958-03-17 1962-12-04 Gen Electric Method of forming wire
US3362842A (en) * 1963-10-31 1968-01-09 Navy Usa Method of providing refractory metals with protective coatings and resulting article
US3366409A (en) * 1965-06-10 1968-01-30 Philips Corp Ceramic-to-metal seal
US3497376A (en) * 1966-10-10 1970-02-24 Us Air Force Method for application of solid lubricant coatings
US4209556A (en) * 1976-11-03 1980-06-24 Libbey-Owens-Ford Company Method of processing glazed tubular inserts
DE3205746A1 (en) * 1982-02-18 1983-08-25 Philips Patentverwaltung Thermionic cathode and method for the production thereof

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2119565A (en) * 1982-04-23 1983-11-16 Raytheon Co Method of making a cathode electrode and product of such method

Also Published As

Publication number Publication date
US2339392A (en) 1944-01-18

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