EP 0034512 A2 19810826 - Heating element for indirectly heated cathodes, process for manufacturing such an element and indirectly heated cathode comprising the same.
Title (en)
Heating element for indirectly heated cathodes, process for manufacturing such an element and indirectly heated cathode comprising the same.
Title (de)
Heizungselement für indirekt geheizte Kathoden, Herstellungsverfahren eines solchen Elements und indirekt geheizte Kathode, die solch ein Element enthält.
Title (fr)
Elément chauffant pour cathode à chauffage indirect, procédé de fabrication d'un tel élément, et cathode à chauffage indirect comportant un tel élément.
Publication
Application
Priority
FR 8003410 A 19800215
Abstract (en)
[origin: US4427916A] This heating element is constituted by a filament and a mixture, fritted at between 1700 DEG and 1800 DEG C., of alumina and less than 10% by weight of yttrium oxide. This mixture fills the space left free by the filament within the cylinder closed by an emissive disk forming the cathode.
Abstract (fr)
Cet élément chauffant est constitué d'un filament (3) et d'un mélange (4), fritté entre 1700 et 1800°C, d'alumine et de moins de 10 % en poids d'oxyde d'yttrium. Ce mélange remplit l'espace laissé libre par le filament à l'intérieur du cylindre (2) obturé par un disque émissif (1) qui constitue la cathode.
IPC 1-7
IPC 8 full level
H01J 1/24 (2006.01)
CPC (source: EP US)
H01J 1/24 (2013.01 - EP US)
Designated contracting state (EPC)
DE GB IT
DOCDB simple family (publication)
EP 0034512 A2 19810826; EP 0034512 A3 19820526; FR 2476386 A1 19810821; FR 2476386 B1 19820820; US 4427916 A 19840124
DOCDB simple family (application)
EP 81400096 A 19810123; FR 8003410 A 19800215; US 23257181 A 19810209