GB437967A - Improvements in thermionic cathodes - Google Patents

Improvements in thermionic cathodes

Info

Publication number
GB437967A
GB437967A GB1431434A GB1431434A GB437967A GB 437967 A GB437967 A GB 437967A GB 1431434 A GB1431434 A GB 1431434A GB 1431434 A GB1431434 A GB 1431434A GB 437967 A GB437967 A GB 437967A
Authority
GB
United Kingdom
Prior art keywords
heated
earth metal
alkaline earth
thermionic cathodes
compound
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
GB1431434A
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.)
HAROLD PERCY ROOKSBY
General Electric Co PLC
Original Assignee
HAROLD PERCY ROOKSBY
General Electric Co PLC
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 HAROLD PERCY ROOKSBY, General Electric Co PLC filed Critical HAROLD PERCY ROOKSBY
Priority to GB1431434A priority Critical patent/GB437967A/en
Publication of GB437967A publication Critical patent/GB437967A/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
    • 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

Landscapes

  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Compounds Of Alkaline-Earth Elements, Aluminum Or Rare-Earth Metals (AREA)

Abstract

A compound for use in the production of thermionic cathodes is produced by heating oxygen compounds of aluminium and an alkaline earth metal, particularly barium, in proportions corresponding to the formula 3 XO.Al2O3.X being the alkaline earth metal, which is believed to represent the resulting compound. As an example finely divided barium carbonate and aluminium oxide are heated to 1100 DEG C. in air, reground, and heated to 1400 DEG C. in hydrogen. Specifications 272,440, [Class 39 (i)], and 436,527, are referred to.
GB1431434A 1934-05-11 1934-05-11 Improvements in thermionic cathodes Expired GB437967A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB1431434A GB437967A (en) 1934-05-11 1934-05-11 Improvements in thermionic cathodes

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1431434A GB437967A (en) 1934-05-11 1934-05-11 Improvements in thermionic cathodes

Publications (1)

Publication Number Publication Date
GB437967A true GB437967A (en) 1935-11-08

Family

ID=10038939

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1431434A Expired GB437967A (en) 1934-05-11 1934-05-11 Improvements in thermionic cathodes

Country Status (1)

Country Link
GB (1) GB437967A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1039140B (en) * 1953-04-02 1958-09-18 Csf Process for the production of supply cathodes

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1039140B (en) * 1953-04-02 1958-09-18 Csf Process for the production of supply cathodes

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