GB303369A - - Google Patents

Info

Publication number
GB303369A
GB303369A GB38428/28A GB3842828A GB303369A GB 303369 A GB303369 A GB 303369A GB 38428/28 A GB38428/28 A GB 38428/28A GB 3842828 A GB3842828 A GB 3842828A GB 303369 A GB303369 A GB 303369A
Authority
GB
United Kingdom
Prior art keywords
gas
occluded
metals
emissive
grammont
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
GB38428/28A
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.)
Ets INDUSTRIELS DE E C ET DE ALEXANDRE GRAMMONT Ste
Original Assignee
Ets INDUSTRIELS DE E C ET DE ALEXANDRE GRAMMONT Ste
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 Ets INDUSTRIELS DE E C ET DE ALEXANDRE GRAMMONT Ste filed Critical Ets INDUSTRIELS DE E C ET DE ALEXANDRE GRAMMONT Ste
Publication of GB303369A publication Critical patent/GB303369A/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)
  • Manufacture And Refinement Of Metals (AREA)
  • Cold Cathode And The Manufacture (AREA)
GB38428/28A 1927-12-31 1928-12-29 Expired GB303369A (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR303369T 1927-12-31

Publications (1)

Publication Number Publication Date
GB303369A true GB303369A (de) 1930-01-02

Family

ID=31897873

Family Applications (1)

Application Number Title Priority Date Filing Date
GB38428/28A Expired GB303369A (de) 1927-12-31 1928-12-29

Country Status (2)

Country Link
DE (1) DE512263C (de)
GB (1) GB303369A (de)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE964078C (de) * 1940-12-10 1957-05-16 Siemens Ag Oxydkathode

Also Published As

Publication number Publication date
DE512263C (de) 1930-11-08

Similar Documents

Publication Publication Date Title
US2144249A (en) Cathode for electron discharge devices
GB303369A (de)
US1971940A (en) Gaseous electric discharge device
Barnes The emission of positive ions from heated metals
US1767218A (en) Positive-ion emitter
US1653366A (en) Clean-up and activation by misch metal and the rare-earth metals
US2237242A (en) Phototube
US2054030A (en) Electric discharge device and method of manufacture
GB613946A (en) Improvements in or relating to thermionic tubes having a secondary-emission electrode
GB494651A (en) Improvements in electron discharge devices used as voltage indicators
US1699112A (en) maorae
GB274507A (en) High emission thermionic valve
US1731268A (en) Electron-discharge device
US1839408A (en) Positive column conduction tube
GB377041A (en) Improvements in or relating to gasfilled discharge tubes
US2229138A (en) Vaporizing material
US1578045A (en) Autoelectronic device
GB267142A (en) Improvements in thermionic electrodes
GB434643A (en) Improvements in or relating to electron discharge devices
GB256975A (en) Process of making vacuum tubes
GB237919A (en) Improvements in and relating to valves for wireless telegraphy and telephony
US1849527A (en) Electron discharge device and process of making the same
US2185832A (en) Electric discharge device and method of manufacture
GB486940A (en) Improvements in or relating to electric discharge devices
US1668734A (en) Electron-emitting cathode and method of making it