公开(公告)号：US3610996A

公开(公告)日：1971-10-05

申请号：US3610996D

申请日：1969-05-20

Applicant: BEATRIX A ELSASSER RUSTERHOLZ ,  PATELHOLD PATENTVERWERTUNG

Inventor： RUSTERHOLZ ALEXANDER

IPC: H01J21/02 ,  H01J21/18 ,  H01J1/46 ,  H01J1/50

CPC classification number: H01J21/18 ,  H01J21/02

Abstract: In a high vacuum electron control tube, a cathode comprised of a plurality of spaced parallel cathode wires or filaments arranged upon a generally cylindrical surface parallel to the cylinder axis cooperates with a common generally cylindrical anode concentric with the cathode structure and a control electrode composed of a plurality of planar loop-shaped control elements each arranged radially between adjacent pairs of cathode wires. Suitable oriented U-shaped metallic screens surrounding each of the cathode wires and a homogeneous magnetic field extending parallel to said wires coact to cause the electrons emitted from each cathode wire to follow cycloidal paths towards said anode with a minimum of electrons reaching said control electrode even in case of relatively high positive control voltages, while at the same time ensuring a high amplification factor of the tube.