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FR936339A - Manufacturing process of cathodes for discharge tubes - Google Patents

Manufacturing process of cathodes for discharge tubes

Info

Publication number
FR936339A
FR936339A FR936339DA FR936339A FR 936339 A FR936339 A FR 936339A FR 936339D A FR936339D A FR 936339DA FR 936339 A FR936339 A FR 936339A
Authority
FR
France
Prior art keywords
cathodes
manufacturing process
discharge tubes
tubes
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
Other languages
French (fr)
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
Application granted granted Critical
Publication of FR936339A publication Critical patent/FR936339A/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)
  • Gas-Filled Discharge Tubes (AREA)
  • Physical Vapour Deposition (AREA)
FR936339D 1944-11-04 1946-11-27 Manufacturing process of cathodes for discharge tubes Expired FR936339A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
BE258433X 1944-11-04

Publications (1)

Publication Number Publication Date
FR936339A true FR936339A (en) 1948-07-16

Family

ID=3866700

Family Applications (1)

Application Number Title Priority Date Filing Date
FR936339D Expired FR936339A (en) 1944-11-04 1946-11-27 Manufacturing process of cathodes for discharge tubes

Country Status (5)

Country Link
US (1) US2453753A (en)
BE (1) BE457760A (en)
CH (1) CH258433A (en)
DE (1) DE803919C (en)
FR (1) FR936339A (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL203172A (en) * 1954-12-31
NL101810C (en) * 1955-02-12
US2750528A (en) * 1955-02-17 1956-06-12 Sylvania Electric Prod Electronic tube element protective coating

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB255090A (en) * 1925-07-13 1927-06-09 Gen Electric Improvements in or relating to methods of manufacturing electrodes for electron discharge devices
US1936334A (en) * 1929-01-31 1933-11-21 Gen Scientific Corp Electrode
US1936419A (en) * 1930-06-03 1933-11-21 Gen Electric Photo-electric tube

Also Published As

Publication number Publication date
CH258433A (en) 1948-11-30
DE803919C (en) 1951-04-12
BE457760A (en)
US2453753A (en) 1948-11-16

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