发明名称 |
Cathode for cathode ray tube with improved lifetime |
摘要 |
Impregnated cathode for a vacuum tube comprising an emissive part in the form of a porous pellet impregnated with a compound of alkaline earth metals; the pellet is placed in a dish made of a refractory material and covered with a porous metal foil forming the emissive surface of the cathode. Moreover, the pellet has a separation surface between a heavily impregnated zone and a zone which is not impregnated or weakly impregnated so that the said separation surface comprises at least a hollow part facing the emissive surface. By virtue of the shape of this separation surface, the lifetime of the cathode is improved.
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申请公布号 |
US2005140262(A1) |
申请公布日期 |
2005.06.30 |
申请号 |
US20040498045 |
申请日期 |
2004.06.08 |
申请人 |
RICAUD JEAN-LUC;ROQUAIS JEAN-MICHEL |
发明人 |
RICAUD JEAN-LUC;ROQUAIS JEAN-MICHEL |
分类号 |
H01J1/28;H01J29/04;(IPC1-7):H01J1/142 |
主分类号 |
H01J1/28 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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