GB630624A - Improvements in the method of making cathodes for thermionic valves - Google Patents

Improvements in the method of making cathodes for thermionic valves

Info

Publication number
GB630624A
GB630624A GB6170/47A GB617047A GB630624A GB 630624 A GB630624 A GB 630624A GB 6170/47 A GB6170/47 A GB 6170/47A GB 617047 A GB617047 A GB 617047A GB 630624 A GB630624 A GB 630624A
Authority
GB
United Kingdom
Prior art keywords
filament
metals
substance
march
magnesium
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
GB6170/47A
Other languages
English (en)
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 GB630624A publication Critical patent/GB630624A/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
    • 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
    • H01J1/24—Insulating layer or body located between heater and 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.]

Landscapes

  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Powder Metallurgy (AREA)
  • Discharge Lamp (AREA)
GB6170/47A 1946-03-05 1947-03-04 Improvements in the method of making cathodes for thermionic valves Expired GB630624A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR836527X 1946-03-05

Publications (1)

Publication Number Publication Date
GB630624A true GB630624A (en) 1949-10-18

Family

ID=9298138

Family Applications (1)

Application Number Title Priority Date Filing Date
GB6170/47A Expired GB630624A (en) 1946-03-05 1947-03-04 Improvements in the method of making cathodes for thermionic valves

Country Status (6)

Country Link
US (1) US2520760A (xx)
CH (1) CH266493A (xx)
DE (1) DE836527C (xx)
FR (1) FR926598A (xx)
GB (1) GB630624A (xx)
NL (1) NL69250C (xx)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4810925A (en) * 1986-05-16 1989-03-07 English Electric Valve Company Limited Directly heated cathodes

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL102345C (xx) * 1954-06-16
FR1137688A (fr) * 1954-10-22 1957-06-03 Thomson Houston Comp Francaise Cathode perfectionnée
US3097419A (en) * 1960-03-11 1963-07-16 dickson
CH539945A (de) * 1971-12-29 1973-07-31 Bbc Brown Boveri & Cie Verfahren zur Herstellung von Gitterelektroden für elektrische Entladungsgefässe
DE4026301A1 (de) * 1990-08-20 1992-02-27 Siemens Ag Elektronenemitter einer roentgenroehre

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2106855A (en) * 1924-02-20 1938-02-01 Westinghouse Electric & Mfg Co Space-current device
NL33511C (xx) * 1926-07-07
US1961122A (en) * 1928-08-22 1934-05-29 Westinghouse Electric & Mfg Co Thermionic cathode
CH215769A (de) * 1938-12-02 1941-07-15 Lorenz C Ag Kathode für Elektronenröhren.
US2263169A (en) * 1940-10-12 1941-11-18 Westinghouse Electric & Mfg Co Indirectly heated cathode

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4810925A (en) * 1986-05-16 1989-03-07 English Electric Valve Company Limited Directly heated cathodes

Also Published As

Publication number Publication date
NL69250C (xx)
CH266493A (fr) 1950-01-31
DE836527C (de) 1952-04-15
FR926598A (fr) 1947-10-06
US2520760A (en) 1950-08-29

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