FR699121A - Electron tube - Google Patents

Electron tube

Info

Publication number
FR699121A
FR699121A FR699121DA FR699121A FR 699121 A FR699121 A FR 699121A FR 699121D A FR699121D A FR 699121DA FR 699121 A FR699121 A FR 699121A
Authority
FR
France
Prior art keywords
electron tube
electron
tube
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 FR699121A publication Critical patent/FR699121A/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
    • H01J1/30—Cold cathodes, e.g. field-emissive cathode
    • H01J1/304—Field-emissive cathodes
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J33/00—Discharge tubes with provision for emergence of electrons or ions from the vessel; Lenard tubes
    • H01J33/02—Details
FR699121D 1929-07-27 1930-07-18 Electron tube Expired FR699121A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL1970532X 1929-07-27

Publications (1)

Publication Number Publication Date
FR699121A true FR699121A (en) 1931-02-10

Family

ID=19873398

Family Applications (1)

Application Number Title Priority Date Filing Date
FR699121D Expired FR699121A (en) 1929-07-27 1930-07-18 Electron tube

Country Status (2)

Country Link
US (1) US1970532A (en)
FR (1) FR699121A (en)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2419544A (en) * 1941-06-13 1947-04-29 Standard Telephones Cables Ltd Electron discharge tube
US2493423A (en) * 1944-05-29 1950-01-03 Rca Corp Electron discharge device of the magnetron type
BE480997A (en) * 1947-03-07
US3174043A (en) * 1961-06-01 1965-03-16 Field Emission Corp Short pulse-high intensity vacuum arc x-ray system
US3173006A (en) * 1962-10-22 1965-03-09 Field Emission Corp Short pulse-high energy electron radiation tube
NL302399A (en) * 1963-03-21

Also Published As

Publication number Publication date
US1970532A (en) 1934-08-14

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