ES179643A1 - IMPROVEMENTS RELATED TO ELECTRONIC EMITTER FILAMENTS - Google Patents

IMPROVEMENTS RELATED TO ELECTRONIC EMITTER FILAMENTS

Info

Publication number
ES179643A1
ES179643A1 ES179643A ES179643A ES179643A1 ES 179643 A1 ES179643 A1 ES 179643A1 ES 179643 A ES179643 A ES 179643A ES 179643 A ES179643 A ES 179643A ES 179643 A1 ES179643 A1 ES 179643A1
Authority
ES
Spain
Prior art keywords
electronic emitter
improvements related
emitter filaments
filaments
electronic
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
ES179643A
Other languages
Spanish (es)
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.)
Nokia Spain SA
Original Assignee
Alcatel Espana SA
Standard Electrica SA
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 Alcatel Espana SA, Standard Electrica SA filed Critical Alcatel Espana SA
Publication of ES179643A1 publication Critical patent/ES179643A1/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
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J19/00—Details of vacuum tubes of the types covered by group H01J21/00
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J2893/00—Discharge tubes and lamps
    • H01J2893/0001—Electrodes and electrode systems suitable for discharge tubes or lamps
    • H01J2893/0012—Constructional arrangements
    • H01J2893/0019—Chemical composition and manufacture
    • H01J2893/0022—Manufacture
    • H01J2893/0023—Manufacture carbonising and other surface treatments

Landscapes

  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Solid Thermionic Cathode (AREA)
ES179643A 1946-09-06 1947-09-08 IMPROVEMENTS RELATED TO ELECTRONIC EMITTER FILAMENTS Expired ES179643A1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2683246A GB616487A (en) 1946-09-06 1946-09-06 Improvements in or relating to electron emission filaments

Publications (1)

Publication Number Publication Date
ES179643A1 true ES179643A1 (en) 1947-10-16

Family

ID=10249973

Family Applications (1)

Application Number Title Priority Date Filing Date
ES179643A Expired ES179643A1 (en) 1946-09-06 1947-09-08 IMPROVEMENTS RELATED TO ELECTRONIC EMITTER FILAMENTS

Country Status (4)

Country Link
BE (1) BE476381A (en)
ES (1) ES179643A1 (en)
FR (1) FR952894A (en)
GB (1) GB616487A (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2838020C3 (en) * 1978-08-31 1987-06-19 Siemens AG, 1000 Berlin und 8000 München Directly heated cathode for transmitter tubes with coaxial electrode structure
US4424044A (en) * 1982-04-23 1984-01-03 Raytheon Company Method of fabricating cathode electrodes

Also Published As

Publication number Publication date
FR952894A (en) 1949-11-25
BE476381A (en)
GB616487A (en) 1949-01-21

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