公开(公告)号：US3560791A

公开(公告)日：1971-02-02

申请号：US3560791D

申请日：1968-09-06

Applicant: SIEMENS AG

Inventor： BERTELSMANN WILHELM

IPC: H01J1/18 ,  H01J1/15 ,  H01J19/08

CPC classification number: H01J1/18

Abstract: A mesh cathode comprising a tubular mesh grid formed of electron-emitting wires; the tubular grid having one end portion thereof fastened to an annular heating current supply terminal and having the other end portion thereof attached to a cap which is supported on a rod disposed coaxially of the tubular grid. The rod and the cap cooperate to form a second heating current supply terminal. The cap comprises a plurality of laminar members each having a plurality of arms extending radially outwardly from a centrally disposed hub having an aperture therethrough for fittingly engaging the supporting rod. The laminar members are arranged with the arms in a staggered pattern relative to each other.