GB407373A - Method of producing electric discharge tubes - Google Patents

Method of producing electric discharge tubes

Info

Publication number
GB407373A
GB407373A GB25765/32A GB2576532A GB407373A GB 407373 A GB407373 A GB 407373A GB 25765/32 A GB25765/32 A GB 25765/32A GB 2576532 A GB2576532 A GB 2576532A GB 407373 A GB407373 A GB 407373A
Authority
GB
United Kingdom
Prior art keywords
vapour
tube
heated
barium
metallic
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
GB25765/32A
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Publication of GB407373A publication Critical patent/GB407373A/en
Expired legal-status Critical Current

Links

Classifications

    • HELECTRICITY
    • H01ELECTRIC 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

Landscapes

  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Manufacture Of Electron Tubes, Discharge Lamp Vessels, Lead-In Wires, And The Like (AREA)
GB25765/32A 1931-09-19 1932-09-16 Method of producing electric discharge tubes Expired GB407373A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE407373X 1931-09-19

Publications (1)

Publication Number Publication Date
GB407373A true GB407373A (en) 1934-03-16

Family

ID=6422168

Family Applications (1)

Application Number Title Priority Date Filing Date
GB25765/32A Expired GB407373A (en) 1931-09-19 1932-09-16 Method of producing electric discharge tubes

Country Status (3)

Country Link
FR (1) FR742944A (enrdf_load_stackoverflow)
GB (1) GB407373A (enrdf_load_stackoverflow)
NL (1) NL40641C (enrdf_load_stackoverflow)

Also Published As

Publication number Publication date
FR742944A (enrdf_load_stackoverflow) 1933-03-18
NL40641C (enrdf_load_stackoverflow)

Similar Documents

Publication Publication Date Title
US2566115A (en) Alloy for cathode element
US2233917A (en) Black coating for electron discharge devices
US2497110A (en) Method of making electrodes
US2275886A (en) Process of activating cathodes
GB477462A (en) Improvements in or relating to metallic electric conductors sealed through quartz
GB407373A (en) Method of producing electric discharge tubes
US1735080A (en) Electron-emitting cathode
US1961122A (en) Thermionic cathode
US1616431A (en) Treatment of vacuum devices to remove occluded gases therefrom
US2209708A (en) Cathode manufacture
US1809229A (en) Electric discharge tube
US1759454A (en) Uranium metal and product and process of making the same
US1661436A (en) Helium space discharge tube
US1830162A (en) Cathode and process of making the same
US1843244A (en) Incandescent cathode for electron discharge devices
US1720675A (en) Manufacture of oxide cathodes
GB450074A (en) Improvements in or relating to electron tubes
US1691446A (en) Electron-discharge device with oxide-coated filament
US1849056A (en) Electron discharge device
GB311705A (en) Process for the manufacture of oxide cathodes for discharge tubes
GB265222A (en) Improvements in electric discharge devices
GB459469A (en) Improvements in or relating to vacuum tight seals for electron discharge devices
US1871352A (en) Electron discharge device and method of manufacture
US1716149A (en) Evacuating electric discharge device
GB364583A (en) Improvements in or relating to the cathodes of vacuum tubes