FR774589A - Indirectly heated cathode for electric discharge tubes - Google Patents

Indirectly heated cathode for electric discharge tubes

Info

Publication number
FR774589A
FR774589A FR774589DA FR774589A FR 774589 A FR774589 A FR 774589A FR 774589D A FR774589D A FR 774589DA FR 774589 A FR774589 A FR 774589A
Authority
FR
France
Prior art keywords
electric discharge
discharge tubes
indirectly heated
heated cathode
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.)
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 FR774589A publication Critical patent/FR774589A/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
    • H01J1/20—Cathodes heated indirectly by an electric current; Cathodes heated by electron or ion bombardment
    • H01J1/26—Supports for the emissive material
FR774589D 1933-06-20 1934-06-15 Indirectly heated cathode for electric discharge tubes Expired FR774589A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL418797X 1933-06-20

Publications (1)

Publication Number Publication Date
FR774589A true FR774589A (en) 1934-12-08

Family

ID=19786039

Family Applications (1)

Application Number Title Priority Date Filing Date
FR774589D Expired FR774589A (en) 1933-06-20 1934-06-15 Indirectly heated cathode for electric discharge tubes

Country Status (2)

Country Link
FR (1) FR774589A (en)
GB (1) GB418797A (en)

Also Published As

Publication number Publication date
GB418797A (en) 1934-10-31

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