H - Electricity – 01 – J
Patent
H - Electricity
01
J
313/187
H01J 1/15 (2006.01) H01J 1/14 (2006.01) H01J 61/067 (2006.01)
Patent
CA 1276965
ABSTRACT: A hot cathode in a wire form that is useful in a vacuum tube, a CRT or a fluorescent display tube is dis- closed. The cathode is composed of a heat-resistant metal in a wire form that holds on it an electron-emitting metal material that is made of 0.2 - 20 wt% of a rare earth metal oxide in admixture with an alkaline earth metal oxide the balance of which contains at least barium oxide. The reduc- tion of oxide barium to barium as a result of reaction with the cathode wire is so much retarded that an increased emis- sion current will be produced from the cathode not only in its initial operation but also through out its operation.
548815
Fukuyama Keiji
Ishida Masako
Kamata Toyokazu
Nakanishi Hisao
Saito Masato
Mitsubishi Denki Kabushiki Kaisha
Riches Mckenzie & Herbert Llp
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