GB285434A - Improved process of manufacturing incandescent cathodes for electric discharge devices - Google Patents

Improved process of manufacturing incandescent cathodes for electric discharge devices

Info

Publication number
GB285434A
GB285434A GB4548/28A GB454828A GB285434A GB 285434 A GB285434 A GB 285434A GB 4548/28 A GB4548/28 A GB 4548/28A GB 454828 A GB454828 A GB 454828A GB 285434 A GB285434 A GB 285434A
Authority
GB
United Kingdom
Prior art keywords
electric discharge
improved process
discharge devices
core
oxygen
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
GB4548/28A
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.)
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 GB285434A publication Critical patent/GB285434A/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)
  • Discharge Lamp (AREA)
GB4548/28A 1927-02-16 1928-02-13 Improved process of manufacturing incandescent cathodes for electric discharge devices Expired GB285434A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR285434X 1927-02-16

Publications (1)

Publication Number Publication Date
GB285434A true GB285434A (en) 1928-10-04

Family

ID=8887207

Family Applications (1)

Application Number Title Priority Date Filing Date
GB4548/28A Expired GB285434A (en) 1927-02-16 1928-02-13 Improved process of manufacturing incandescent cathodes for electric discharge devices

Country Status (2)

Country Link
BE (1) BE348892A (enrdf_load_stackoverflow)
GB (1) GB285434A (enrdf_load_stackoverflow)

Also Published As

Publication number Publication date
BE348892A (enrdf_load_stackoverflow)

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