公开(公告)号：US3588588A

公开(公告)日：1971-06-28

申请号：US3588588D

申请日：1969-06-16

Applicant: MATSUSHITA ELECTRONICS CORP

Inventor： NUMATA TSUNEO

IPC: H01J23/00 ,  H01J23/10 ,  H01J25/50

CPC classification number: H01J23/10 ,  H01J23/005

Abstract: A MAGNETRON DEVICE IN WHICH AN UPPER INSULATOR VESSEL INCLUDING THEREIN CATHODE LEAD MEMBERS EXTENDING FROM A CATHODE CONTAINED, TOGETHER WITH AN ANODE, A CAVITY RESONATOR AND MAGNETIC POLE PIECES, IN A METAL VESSEL IS DISPOSED IN AN AXIAL HOLE IN A CYLINDRICAL OR CONICAL PERMANENT MAGNET FOR EXCITING A MAGNETRON WITH AN INTERSTICE THEREBETWEEN TO DEFINE A VENTILATION FLUE FOR EFFECTIVELY COOLING THE UPPER INSULATOR VESSEL AND THE PERMANENT MAGNET TO PREVENT THE INSULATOR VESSEL FROM BREAKAGE DUE TO UNEVEN HEATING OF THE INSULATOR VESSEL BY MAKING THE DISTRIBUTION OF THE TEMPERATURE OF THE INSULATOR VESSEL EVEN.