FR507198A - Improvements to electronic discharge devices and their method of preparation - Google Patents

Improvements to electronic discharge devices and their method of preparation

Info

Publication number
FR507198A
FR507198A FR507198A FR507198DA FR507198A FR 507198 A FR507198 A FR 507198A FR 507198 A FR507198 A FR 507198A FR 507198D A FR507198D A FR 507198DA FR 507198 A FR507198 A FR 507198A
Authority
FR
France
Prior art keywords
preparation
discharge devices
electronic discharge
electronic
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
FR507198A
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 FR507198A publication Critical patent/FR507198A/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
    • H01J1/14—Solid thermionic cathodes characterised by the material
FR507198A 1914-07-15 1919-12-09 Improvements to electronic discharge devices and their method of preparation Expired FR507198A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US1914851095A 1914-07-15 1914-07-15

Publications (1)

Publication Number Publication Date
FR507198A true FR507198A (en) 1920-09-07

Family

ID=44074014

Family Applications (1)

Application Number Title Priority Date Filing Date
FR507198A Expired FR507198A (en) 1914-07-15 1919-12-09 Improvements to electronic discharge devices and their method of preparation

Country Status (3)

Country Link
US (1) US1244216A (en)
DE (1) DE311102C (en)
FR (1) FR507198A (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2525262A (en) * 1948-02-18 1950-10-10 Cooper Hewitt Electric Co Method of producing highly emissive electrodes
US2675498A (en) * 1948-12-07 1954-04-13 Raytheon Mfg Co Cathode for electron discharge devices
US2525263A (en) * 1950-08-25 1950-10-10 Michel E Macksoud Method of producing highly emissive electrodes
US3134924A (en) * 1960-07-05 1964-05-26 Monsanto Co Emissive materials of a metal matrix with molecularly dispersed additives

Also Published As

Publication number Publication date
US1244216A (en) 1917-10-23
DE311102C (en) 1919-02-25

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