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FR678689A - Perfectionnements aux valves thermoioniques - Google Patents

Perfectionnements aux valves thermoioniques

Info

Publication number
FR678689A
FR678689A FR678689DA FR678689A FR 678689 A FR678689 A FR 678689A FR 678689D A FR678689D A FR 678689DA FR 678689 A FR678689 A FR 678689A
Authority
FR
France
Prior art keywords
thermionic valves
thermionic
valves
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
English (en)
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 FR678689A publication Critical patent/FR678689A/fr
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
FR678689D 1928-07-28 1929-07-18 Perfectionnements aux valves thermoioniques Expired FR678689A (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB678689X 1928-07-28

Publications (1)

Publication Number Publication Date
FR678689A true FR678689A (fr) 1930-04-03

Family

ID=10492289

Family Applications (1)

Application Number Title Priority Date Filing Date
FR678689D Expired FR678689A (fr) 1928-07-28 1929-07-18 Perfectionnements aux valves thermoioniques

Country Status (2)

Country Link
DE (1) DE608696C (fr)
FR (1) FR678689A (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5324475A (en) * 1991-10-30 1994-06-28 E. I. Du Pont De Nemours And Company Process for preparing biaxially stretched isotropic polyimide film

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE757106C (de) * 1937-04-01 1953-02-23 Siemens & Halske A G Strahlungsgekuehlter Heissleiter zur Regelung sehr kleiner Leistungen

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5324475A (en) * 1991-10-30 1994-06-28 E. I. Du Pont De Nemours And Company Process for preparing biaxially stretched isotropic polyimide film

Also Published As

Publication number Publication date
DE608696C (de) 1935-01-30

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