FR687693A - Electron tube - Google Patents

Electron tube

Info

Publication number
FR687693A
FR687693A FR687693DA FR687693A FR 687693 A FR687693 A FR 687693A FR 687693D A FR687693D A FR 687693DA FR 687693 A FR687693 A FR 687693A
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.)
Federal Telegraph Co
Original Assignee
Federal Telegraph Co
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 Federal Telegraph Co filed Critical Federal Telegraph Co
Application granted granted Critical
Publication of FR687693A publication Critical patent/FR687693A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J19/00—Details of vacuum tubes of the types covered by group H01J21/00
    • H01J19/02—Electron-emitting electrodes; Cathodes
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J2893/00—Discharge tubes and lamps
    • H01J2893/0001—Electrodes and electrode systems suitable for discharge tubes or lamps
FR687693D 1929-01-05 1930-01-04 Electron tube Expired FR687693A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US687693XA 1929-01-05 1929-01-05

Publications (1)

Publication Number Publication Date
FR687693A true FR687693A (en) 1930-08-12

Family

ID=22084587

Family Applications (1)

Application Number Title Priority Date Filing Date
FR687693D Expired FR687693A (en) 1929-01-05 1930-01-04 Electron tube

Country Status (1)

Country Link
FR (1) FR687693A (en)

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