FR874688A - Cathode - Google Patents

Cathode

Info

Publication number
FR874688A
FR874688A FR874688DA FR874688A FR 874688 A FR874688 A FR 874688A FR 874688D A FR874688D A FR 874688DA FR 874688 A FR874688 A FR 874688A
Authority
FR
France
Prior art keywords
cathode
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.)
Telefunken AG
Original Assignee
Telefunken AG
Telefunken Gesellschaft fuer Drahtlose Telegraphie mbH
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 Telefunken AG, Telefunken Gesellschaft fuer Drahtlose Telegraphie mbH filed Critical Telefunken AG
Application granted granted Critical
Publication of FR874688A publication Critical patent/FR874688A/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
    • H01J1/15—Cathodes heated directly by an electric current
    • H01J1/16—Cathodes heated directly by an electric current characterised by the shape
FR874688D 1940-04-30 1941-08-12 Cathode Expired FR874688A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE217878X 1940-04-30

Publications (1)

Publication Number Publication Date
FR874688A true FR874688A (en) 1942-08-18

Family

ID=5830999

Family Applications (1)

Application Number Title Priority Date Filing Date
FR874688D Expired FR874688A (en) 1940-04-30 1941-08-12 Cathode

Country Status (4)

Country Link
BE (1) BE441216A (en)
CH (1) CH217878A (en)
FR (1) FR874688A (en)
NL (1) NL54367C (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0520445A1 (en) * 1991-06-25 1992-12-30 Nec Corporation Heater coil for electron tube

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2422142A (en) * 1945-05-26 1947-06-10 Machlett Lab Inc Cathode structure for electron discharge devices

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0520445A1 (en) * 1991-06-25 1992-12-30 Nec Corporation Heater coil for electron tube

Also Published As

Publication number Publication date
CH217878A (en) 1941-11-15
BE441216A (en)
NL54367C (en)

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