FR57812E - Method of manufacturing an indirectly heated cathode and cathode obtained by this method - Google Patents

Method of manufacturing an indirectly heated cathode and cathode obtained by this method

Info

Publication number
FR57812E
FR57812E FR57812DA FR57812E FR 57812 E FR57812 E FR 57812E FR 57812D A FR57812D A FR 57812DA FR 57812 E FR57812 E FR 57812E
Authority
FR
France
Prior art keywords
cathode
manufacturing
indirectly heated
heated cathode
cathode obtained
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 FR57812E publication Critical patent/FR57812E/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J1/00—Details of electrodes, of magnetic control means, of screens, or of the mounting or spacing thereof, common to two or more basic types of discharge tubes or lamps
    • H01J1/02—Main electrodes
    • H01J1/13—Solid thermionic cathodes
    • H01J1/15—Cathodes heated directly by an electric current
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J1/00—Details of electrodes, of magnetic control means, of screens, or of the mounting or spacing thereof, common to two or more basic types of discharge tubes or lamps
    • H01J1/02—Main electrodes
    • H01J1/13—Solid thermionic cathodes
    • H01J1/20—Cathodes heated indirectly by an electric current; Cathodes heated by electron or ion bombardment
FR57812D 1946-11-13 1947-11-12 Method of manufacturing an indirectly heated cathode and cathode obtained by this method Expired FR57812E (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
NL264502X 1946-11-13
CH230150T 1947-11-04

Publications (1)

Publication Number Publication Date
FR57812E true FR57812E (en) 1953-09-17

Family

ID=25727444

Family Applications (1)

Application Number Title Priority Date Filing Date
FR57812D Expired FR57812E (en) 1946-11-13 1947-11-12 Method of manufacturing an indirectly heated cathode and cathode obtained by this method

Country Status (7)

Country Link
US (1) US2489367A (en)
BE (1) BE478149A (en)
CH (1) CH264502A (en)
DE (1) DE890389C (en)
FR (1) FR57812E (en)
GB (1) GB652382A (en)
NL (1) NL63789C (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2626370A (en) * 1949-05-26 1953-01-20 Rca Corp Filament structure for electron discharge device
US4100449A (en) * 1976-04-05 1978-07-11 Rca Corporation Uniform filament and method of making the same

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1700454A (en) * 1924-07-08 1929-01-29 Western Electric Co Electron emitter and process of making the same
US2112969A (en) * 1926-12-11 1938-04-05 Rca Corp Cathode
NL38569C (en) * 1933-06-24

Also Published As

Publication number Publication date
CH264502A (en) 1949-10-15
GB652382A (en) 1951-04-25
US2489367A (en) 1949-11-29
NL63789C (en)
DE890389C (en) 1953-09-17
BE478149A (en)

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