FR708235A - Electric discharge tube having an indirectly heated cathode - Google Patents

Electric discharge tube having an indirectly heated cathode

Info

Publication number
FR708235A
FR708235A FR708235DA FR708235A FR 708235 A FR708235 A FR 708235A FR 708235D A FR708235D A FR 708235DA FR 708235 A FR708235 A FR 708235A
Authority
FR
France
Prior art keywords
discharge tube
electric discharge
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 FR708235A publication Critical patent/FR708235A/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
FR708235D 1930-01-22 1930-12-22 Electric discharge tube having an indirectly heated cathode Expired FR708235A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL362627X 1930-01-22

Publications (1)

Publication Number Publication Date
FR708235A true FR708235A (en) 1931-07-21

Family

ID=19785436

Family Applications (1)

Application Number Title Priority Date Filing Date
FR708235D Expired FR708235A (en) 1930-01-22 1930-12-22 Electric discharge tube having an indirectly heated cathode

Country Status (5)

Country Link
US (1) US1875106A (en)
DE (1) DE625602C (en)
FR (1) FR708235A (en)
GB (1) GB362627A (en)
NL (1) NL28875C (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2456579A (en) * 1942-10-30 1948-12-14 Rca Corp Electron discharge device for ultra high frequencies
GB810202A (en) * 1955-06-10 1959-03-11 Vickers Electrical Co Ltd Improvements relating to thermionic cathodes for electron discharge devices

Also Published As

Publication number Publication date
US1875106A (en) 1932-08-30
DE625602C (en) 1936-02-12
NL28875C (en)
GB362627A (en) 1931-12-10

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