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.

公开(公告)号：US3562576A

公开(公告)日：1971-02-09

申请号：US3562576D

申请日：1968-03-12

Applicant: PATELHOLD PATENTVERWERTUNG

Inventor： RUSTERHOLZ ALEXANDER

IPC: H01J21/02 ,  H01J21/18 ,  H01J1/46 ,  H01J21/10

CPC classification number: H01J21/18 ,  H01J21/02

Abstract: In a high-vacuum electron tube, an elongated cylindrical control electrode is surrounded by an anode electrode including a plurality of segmental elongated partial anode surfaces extending parallel to and concentric with the axis of said control electrode and a plurality of incandescent cathode wires are disposed also parallel to said axis and each within the space intervening between adjacent anode surfaces. A magnetic field extending in a direction parallel to said axis within the space enclosed by said control electrode and said anode surfaces acts to deflect the electron streams emitted by said cathodes towards the adjacent anode surfaces and to thereby reduce the number of electrons reaching the control electrode. This in turn reduces the power necessary to drive the tube, in particular for tubes operated at a positive control potential (class-C operation). In order to achieve a desired amplification factor of the tube, individual shielding means interposed between each of the cathodes and the adjoining anode surfaces project into the space between the latter and the control electrode to an extent such as to cause, with the current flow through the tube being equal to zero, the electric field strength at said cathodes resulting from unity voltage upon the control electrode to be a predetermined multiple of the electric field strength at said cathodes resulting from unit voltage upon the anode, respectively.

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