FR652017A - High electron emission incandescent cathode - Google Patents

High electron emission incandescent cathode

Info

Publication number
FR652017A
FR652017A FR652017DA FR652017A FR 652017 A FR652017 A FR 652017A FR 652017D A FR652017D A FR 652017DA FR 652017 A FR652017 A FR 652017A
Authority
FR
France
Prior art keywords
electron emission
high electron
incandescent cathode
incandescent
cathode
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.)
Siemens and Halske AG
Siemens AG
Original Assignee
Siemens and Halske AG
Siemens AG
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 Siemens and Halske AG, Siemens AG filed Critical Siemens and Halske AG
Application granted granted Critical
Publication of FR652017A publication Critical patent/FR652017A/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)
  • Solid Thermionic Cathode (AREA)
  • Discharge Lamp (AREA)
FR652017D 1927-04-02 1928-03-31 High electron emission incandescent cathode Expired FR652017A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE288180T 1927-04-02

Publications (1)

Publication Number Publication Date
FR652017A true FR652017A (en) 1929-03-02

Family

ID=31893920

Family Applications (1)

Application Number Title Priority Date Filing Date
FR652017D Expired FR652017A (en) 1927-04-02 1928-03-31 High electron emission incandescent cathode

Country Status (3)

Country Link
US (1) US1830162A (en)
FR (1) FR652017A (en)
GB (1) GB288180A (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2505909A (en) * 1948-02-26 1950-05-02 Bishop H Russell Cathode-ray tube with oxide coated cathode

Also Published As

Publication number Publication date
GB288180A (en) 1929-07-30
US1830162A (en) 1931-11-03

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