EP 0052047 B2 19900502 - THERMOELECTRONIC CATHODE FOR MICROWAVE TUBES, AND TUBE COMPRISING SUCH A CATHODE
Title (en)
THERMOELECTRONIC CATHODE FOR MICROWAVE TUBES, AND TUBE COMPRISING SUCH A CATHODE
Publication
Application
Priority
FR 8023884 A 19801107
Abstract (en)
[origin: US4494035A] This invention concerns a thermoelectronic cathode for hyperfrequency electron tubes. The cathode comprises a cylindrical molybdenum casing, the lower portion of which contains a heating filament, while the upper portion contains two superimposed porous bodies, the lower one made from impregnated material, and the upper one from non-impregnated material.
IPC 1-7
IPC 8 full level
H01J 23/06 (2006.01); H01J 1/28 (2006.01); H01J 23/04 (2006.01)
CPC (source: EP US)
H01J 1/28 (2013.01 - EP US); H01J 23/04 (2013.01 - EP US)
Designated contracting state (EPC)
DE GB IT NL
DOCDB simple family (publication)
EP 0052047 A1 19820519; EP 0052047 B1 19860108; EP 0052047 B2 19900502; DE 3173470 D1 19860220; FR 2494035 A1 19820514; FR 2494035 B1 19830513; JP S57107534 A 19820705; US 4494035 A 19850115
DOCDB simple family (application)
EP 81401713 A 19811027; DE 3173470 T 19811027; FR 8023884 A 19801107; JP 17731181 A 19811106; US 31831681 A 19811104