公开(公告)号：US3566179A

公开(公告)日：1971-02-23

申请号：US3566179D

申请日：1968-06-20

Applicant: AMERICAN MICROWAVE INC

Inventor： KUMPFER BEVERLY D

IPC: H01J1/15 ,  H01J1/16 ,  H01J1/20 ,  H01J19/14

CPC classification number: H01J1/15 ,  H01J1/16

Abstract: The present invention comprises new and useful cathode and heater constructions and assemblies for electron discharge devices, particularly vacuum tubes. The cathode or heater is mounted at both ends to the interior structure of the electron discharge device and, in a preferred form of the invention, is pressed over a pair of bosses which are integral with heat sinks comprising opposite ends of the device. The materials of these bosses and the cathode or heater are so chosen that the coefficient of thermal expansion of the bosses is greater than that of the material of the cathode or heater. In this way, operating temperatures do not reduce, but rather, increase the securement of opposite ends of the cathode or heater to the respective mounting bosses.