GB309581A - Improved process of manufacturing wehnelt-cathodes for electric discharge devices - Google Patents

Improved process of manufacturing wehnelt-cathodes for electric discharge devices

Info

Publication number
GB309581A
GB309581A GB9547/29A GB954729A GB309581A GB 309581 A GB309581 A GB 309581A GB 9547/29 A GB9547/29 A GB 9547/29A GB 954729 A GB954729 A GB 954729A GB 309581 A GB309581 A GB 309581A
Authority
GB
United Kingdom
Prior art keywords
cathodes
alkaline earth
wehnelt
manufacturing
electric discharge
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
GB9547/29A
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.)
Koninklijke Philips NV
Original Assignee
Philips Gloeilampenfabrieken NV
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 Philips Gloeilampenfabrieken NV filed Critical Philips Gloeilampenfabrieken NV
Publication of GB309581A publication Critical patent/GB309581A/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)
  • Inorganic Compounds Of Heavy Metals (AREA)
GB9547/29A 1928-04-13 1929-03-25 Improved process of manufacturing wehnelt-cathodes for electric discharge devices Expired GB309581A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL309581X 1928-04-13

Publications (1)

Publication Number Publication Date
GB309581A true GB309581A (en) 1930-03-13

Family

ID=19783588

Family Applications (1)

Application Number Title Priority Date Filing Date
GB9547/29A Expired GB309581A (en) 1928-04-13 1929-03-25 Improved process of manufacturing wehnelt-cathodes for electric discharge devices

Country Status (5)

Country Link
BE (1) BE359011A (ko)
DE (1) DE598547C (ko)
FR (1) FR671588A (ko)
GB (1) GB309581A (ko)
NL (1) NL24613C (ko)

Also Published As

Publication number Publication date
BE359011A (ko)
DE598547C (de) 1934-06-12
NL24613C (ko)
FR671588A (fr) 1929-12-14

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