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1 340 825 documents amended

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EP 0107522 B1 19870128 - DIRECTLY HEATED CATHODES

Title (en)

DIRECTLY HEATED CATHODES

Publication

EP 0107522 B1 19870128 (FR)

Application

EP 83401675 A 19830817

Priority

FR 8214894 A 19820831

Abstract (en)

[origin: US4563609A] A directly-heated cathode for power electron tubes such as triodes, tetrodes or pentodes comprises a cylindrical sleeve constituted by a lattice of crossed wires forming the emissive portion of the cathode and by two conductive plates attached respectively to each end of the sleeve. In order to permit free deformation of the cathode, a flexible metallic bellows element is fixed between one of the plates and the corresponding end of the cylindrical sleeve.

IPC 1-7

H01J 1/16; H01J 19/10

IPC 8 full level

H01J 1/15 (2006.01)

CPC (source: EP US)

H01J 1/15 (2013.01 - EP US)

Designated contracting state (EPC)

CH DE GB LI

DOCDB simple family (publication)

FR 2532468 A1 19840302; FR 2532468 B1 19850222; DE 3369598 D1 19870305; EP 0107522 A1 19840502; EP 0107522 B1 19870128; US 4563609 A 19860107

DOCDB simple family (application)

FR 8214894 A 19820831; DE 3369598 T 19830817; EP 83401675 A 19830817; US 52423483 A 19830818