| 摘要 |
836,109. Cathode materials and processing. GENERAL ELECTRIC CO. 25 June, 1956 [June 28, 1955], No. 20633/59. Divided out of 831,133. Drawing to Specification. Class 39(1). A thermionic cathode consists of a metal base, a porous layer of metal particles alloyed together and to the base by tantalum, and an emissive coating impregnating and overlying the porous layer. Apart from the tantalum, the other materials and the manner of manufacture are as in Specification 831,133. |
