GB380835A - Highly emissive thermionic cathode - Google Patents

Highly emissive thermionic cathode

Info

Publication number
GB380835A
GB380835A GB18234/31A GB1823431A GB380835A GB 380835 A GB380835 A GB 380835A GB 18234/31 A GB18234/31 A GB 18234/31A GB 1823431 A GB1823431 A GB 1823431A GB 380835 A GB380835 A GB 380835A
Authority
GB
United Kingdom
Prior art keywords
barium
cathode
sulphide
tube
excess
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
GB18234/31A
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.)
Loewe Opta GmbH
Original Assignee
Loewe Opta GmbH
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 Loewe Opta GmbH filed Critical Loewe Opta GmbH
Publication of GB380835A publication Critical patent/GB380835A/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

Landscapes

  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Solid Thermionic Cathode (AREA)
  • Compounds Of Alkaline-Earth Elements, Aluminum Or Rare-Earth Metals (AREA)
GB18234/31A 1930-06-25 1931-06-24 Highly emissive thermionic cathode Expired GB380835A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE380835X 1930-06-25

Publications (1)

Publication Number Publication Date
GB380835A true GB380835A (en) 1932-09-26

Family

ID=6349618

Family Applications (1)

Application Number Title Priority Date Filing Date
GB18234/31A Expired GB380835A (en) 1930-06-25 1931-06-24 Highly emissive thermionic cathode

Country Status (4)

Country Link
US (1) US1893935A (fr)
BE (1) BE380781A (fr)
FR (1) FR719069A (fr)
GB (1) GB380835A (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2861014A (en) * 1956-08-14 1958-11-18 Gen Lab Associates Inc Process of making a semi-conductive ceramic body

Also Published As

Publication number Publication date
FR719069A (fr) 1932-02-01
US1893935A (en) 1933-01-10
BE380781A (fr)

Similar Documents

Publication Publication Date Title
GB465060A (en) Improvements in and relating to cathode ray tube television transmitting apparatus
US2173258A (en) Active metal compound for vacuum tubes
US2224324A (en) Electric discharge tube
US2130190A (en) Getter for vacuum tubes
GB380835A (en) Highly emissive thermionic cathode
US1992566A (en) Fixation of atmospheric nitrogen by means of an electric arc
US2175696A (en) Electron emitter
GB315704A (en) Improvements in or relating to luminous electric discharge tubes
GB272440A (en) Incandescent cathode for electric discharge tubes
US2306290A (en) Cathode alloy
GB219663A (en) Improvements in electrodes for discharge tubes
US1849594A (en) Oxide cathode
US1968823A (en) Gaseous electric discharge lamp device
US1663553A (en) Electron-emitting material
US2001504A (en) Gaseous electric discharge lamp device
US1871352A (en) Electron discharge device and method of manufacture
GB475772A (en) Improvements in electric discharge tubes
US1952854A (en) Manufacture of thermionic cathodes
GB352756A (en) Improvements in and relating to gaseous electric discharge devices
US2421984A (en) Material for gettering electron discharge devices
GB516620A (en) Improvements in cathode ray tubes
GB271401A (en) Improvements in and relating to thermionic valves and methods of manufacturing the same
US1691446A (en) Electron-discharge device with oxide-coated filament
GB642755A (en) Improvements in or relating to the manufacture of oxide cathodes for electric discharge tubes
GB216840A (fr)