GB1304744A - - Google Patents

Info

Publication number
GB1304744A
GB1304744A GB2598270A GB2598270A GB1304744A GB 1304744 A GB1304744 A GB 1304744A GB 2598270 A GB2598270 A GB 2598270A GB 2598270 A GB2598270 A GB 2598270A GB 1304744 A GB1304744 A GB 1304744A
Authority
GB
United Kingdom
Prior art keywords
tube
thc
cathode
core
core material
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
GB2598270A
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 filed Critical
Publication of GB1304744A publication Critical patent/GB1304744A/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
    • 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

Landscapes

  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Solid Thermionic Cathode (AREA)
  • Manufacture And Refinement Of Metals (AREA)

Abstract

1304744 Cathode materials and processing GENERAL ELECTRIC CO 29 May 1970 [12 June 1969] 25982/70 Heading H1D A thermionic cathode is formed by allowing molten cathode forming material to ascend a refractory material tube by capillary action and solidifying the liquid. A porous cathode comprising a core of ThC or ThC and W within a W-Re alloy tube is formed by placing the tube vertically or at an angle in powdered Th and WC, heating by R.F. current in vacuum to form W and ThC liquid mixture, cooling and cutting the tube into short sections. Alternatively, the tube is dropped into already molten core material when an equal molar mixture of ThC and W is required. The end of the tube may be remelted by electron bombardment to form a spherical end. ThC intermetallic compounds and pure refractory metals may be used as core material.
GB2598270A 1969-06-12 1970-05-29 Expired GB1304744A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US83275869A 1969-06-12 1969-06-12

Publications (1)

Publication Number Publication Date
GB1304744A true GB1304744A (en) 1973-01-31

Family

ID=25262550

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2598270A Expired GB1304744A (en) 1969-06-12 1970-05-29

Country Status (5)

Country Link
US (1) US3590242A (en)
DE (1) DE2028481A1 (en)
FR (1) FR2051157A5 (en)
GB (1) GB1304744A (en)
NL (1) NL7008505A (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1442075A (en) * 1974-05-28 1976-07-07 V N I Pk I T Chesky I Elektros Electrodes for arc and plasma-arc working method and apparatus for coating glassware
NL175480C (en) * 1974-06-12 1984-11-01 Philips Nv ELECTRODE FOR A DISCHARGE LAMP, METHOD FOR MANUFACTURING SUCH ELECTRODE AND DISCHARGE LAMP PROVIDED WITH SUCH ELECTRODE.

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3160780A (en) * 1961-01-17 1964-12-08 Philips Corp Indirectly heated cathode
US3258636A (en) * 1961-09-01 1966-06-28 Electron emitter with activator of sill cide, boride or carbide of solid solu- tion of barium and at least one other alkaline earth metal
FR84908E (en) * 1963-04-04 1965-05-07 Commissaria A L En Atomique Improvements in casting processes, in particular ingots, and in particular uranium carbide
US3307241A (en) * 1963-10-14 1967-03-07 Litton Prec Products Inc Process for making cathodes
US3269804A (en) * 1963-11-01 1966-08-30 Gen Electric Dispenser cathode and method for the production thereof
US3434812A (en) * 1964-04-16 1969-03-25 Gen Electric Thermionic cathode
GB1046639A (en) * 1964-08-17 1966-10-26 Gen Electric Improvements in dispenser cathode
US3405044A (en) * 1964-08-19 1968-10-08 Rca Corp Method of making high purity metal zeolite and product thereof
DE1251876B (en) * 1965-12-23
US3488549A (en) * 1968-01-15 1970-01-06 Gen Electric Dispenser cathode material and method of manufacture

Also Published As

Publication number Publication date
US3590242A (en) 1971-06-29
FR2051157A5 (en) 1971-04-02
NL7008505A (en) 1970-12-15
DE2028481A1 (en) 1970-12-17

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
PLNP Patent lapsed through nonpayment of renewal fees