DIRECTLY HEATING IMPREGNATED CATHODE STRUCTURE

摘要

PURPOSE:To obtain a compact cathode structure having a quick-acting property by performing connection of supporting materials and heaters on the back of an insulation base body. CONSTITUTION:Cathodes 1 are fixed to cups 5 while fixing said cups 5 to the flat parts of heaters 2 for making directly heating impregnation type cathodes. A insulation base body 3 is provided with holes while setting up heaters 2 inside said holes while connecting to supporting materials 4 on the back of the insultion base body 3. Thereby, the hole space of the insulation base body 3 can be effectively used while making further the supporting materials on the front side to be unrequired thus becoming structurally simplified.