X-ray or gamma ray systems or devices – Source – Electron tube
Patent
1989-06-30
1991-10-22
Fields, Carolyn E.
X-ray or gamma ray systems or devices
Source
Electron tube
378137, 378138, H01J 3506
Patent
active
050602543
ABSTRACT:
Problems of thermal resistance both of the anode and of the cathode of an x-ray tube are solved by constructing a flat cathode which is set within a stair-step focusing device. It is shown that, depending on the shape of this device, the heat output on the anode is constant irrespective of the load on the x-ray tube.
REFERENCES:
patent: 1923876 (1933-08-01), Mutscheller
patent: 4126805 (1978-11-01), Randall
patent: 4344011 (1982-08-01), Hayashi et al.
patent: 4730353 (1988-03-01), Ono et al.
Patent Abstracts of Japan, vol. 2, No. 64, (E-33) [2148], 05-17-78, p. 2148 E 78; & JP-A-53 30 292, (Tokyo Shibaura Denki K.K.), 3/22/78.
Patent Abstracts of Japan, vol. 4, No. 157, (E-32) [639], 11-04-80, p. 131 E 32; & JP-A-55 108 158, (Hitachi Seisakusho K.K.), 08-19-80.
Caire Francois
de Fraguier Sixte
Thomas Catherine
Fields Carolyn E.
General Electric CGR S.A.
Porta David P.
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