FR693704A - Improvements made to thermionic devices - Google Patents

Improvements made to thermionic devices

Info

Publication number
FR693704A
FR693704A FR693704DA FR693704A FR 693704 A FR693704 A FR 693704A FR 693704D A FR693704D A FR 693704DA FR 693704 A FR693704 A FR 693704A
Authority
FR
France
Prior art keywords
improvements made
thermionic devices
thermionic
devices
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.)
Compagnie Francaise Thomson Houston SA
Original Assignee
Compagnie Francaise Thomson Houston SA
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 Compagnie Francaise Thomson Houston SA filed Critical Compagnie Francaise Thomson Houston SA
Application granted granted Critical
Publication of FR693704A publication Critical patent/FR693704A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J7/00—Details not provided for in the preceding groups and common to two or more basic types of discharge tubes or lamps
    • H01J7/24—Cooling arrangements; Heating arrangements; Means for circulating gas or vapour within the discharge space
FR693704D 1929-04-17 1930-04-11 Improvements made to thermionic devices Expired FR693704A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US693704XA 1929-04-17 1929-04-17

Publications (1)

Publication Number Publication Date
FR693704A true FR693704A (en) 1930-11-24

Family

ID=22088535

Family Applications (1)

Application Number Title Priority Date Filing Date
FR693704D Expired FR693704A (en) 1929-04-17 1930-04-11 Improvements made to thermionic devices

Country Status (1)

Country Link
FR (1) FR693704A (en)

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