公开(公告)号：US3755705A

公开(公告)日：1973-08-28

申请号：US3755705D

申请日：1972-01-31

Applicant: PHILIPS CORP

Inventor： ZWANENBURG G

IPC: H01J1/16 ,  H01J37/065 ,  H01J1/15 ,  H01J19/08

CPC classification number: H01J37/065 ,  H01J1/16

Abstract: A cavity is provided in a wire of a directly-heated cathode so that the temperature at the area of the cavity will be higher when a current is passed through the wire than on either side of the cavity. As a result, the cavity acts as a limited emissive surface and the cathode obtains a longer service life and a more stable construction.

Abstract translation: 在直接加热的阴极的线材中设置空腔，使得当电流通过电线时，空腔区域的温度将高于空腔的任一侧。 结果，空腔充当有限的发射表面，阴极获得更长的使用寿命和更稳定的结构。