EP 0010128 B1 19830216 - DIRECTLY HEATED CATHODE FOR AN ELECTRON TUBE WITH COAXIAL ELECTRODE STRUCTURE AND METHOD OF MAKING SUCH A CATHODE
Title (en)
DIRECTLY HEATED CATHODE FOR AN ELECTRON TUBE WITH COAXIAL ELECTRODE STRUCTURE AND METHOD OF MAKING SUCH A CATHODE
Publication
Application
Priority
DE 2838020 A 19780831
Abstract (en)
[origin: EP0010128A1] 1. A directly heated cathode for electron tubes, in particular transmitter tubes, which has a coaxial structure of the electrodes and their lead-ins, which is secured at one end to an annular cathode lead (12) and at the other end to a cathode cap (9) which is supported on a current supply lead (6) running coaxially in the hollow cylinder, characterized in that the hollow cylinder (1) consists of pyrolytic graphite and is coated with a thin metal layer (10) as emission layer.
IPC 1-7
IPC 8 full level
H01J 9/04 (2006.01); H01J 19/08 (2006.01)
CPC (source: EP)
H01J 9/04 (2013.01); H01J 19/08 (2013.01)
Designated contracting state (EPC)
FR GB NL
DOCDB simple family (publication)
EP 0010128 A1 19800430; EP 0010128 B1 19830216; DE 2838020 A1 19800313; DE 2838020 B2 19810402; DE 2838020 C3 19870619
DOCDB simple family (application)
EP 79102866 A 19790808; DE 2838020 A 19780831