公开(公告)号：US3555640A

公开(公告)日：1971-01-19

申请号：US3555640D

申请日：1968-09-24

Applicant: RCA CORP

Inventor： LUNDVALL CARL L

IPC: H01J9/04 ,  H01J29/04 ,  H01J9/18 ,  H01J9/36

CPC classification number: H01J9/04 ,  H01J29/04

Abstract: METHOD OF MOUNTING A HEATER IN A TUBULAR CATHODE HAVING A CLOSED END IN SUCH A WAY AS TO ASSURE A UNIFORMITY IN THE POSITIONS OF THE HEATERS IN SEVERAL CATHODES AND TO PREVENT CHIPPING AND LOSS OF THE INSULATING COATING ON THE HEATER DURING THE MOUNTING OPERATION. THE METHOD INVOLVES ATTACHING THE ARMS OF A U-SHAPED TAB MEMBER UNIFORMLY TO UNCOATED POTIONS OF THE HEATER LEGS TO PROVIDE A CONVENIENT MANUAL ENGAGEMENT MEANS AND TO RESTRAIN THE LEGS FROM FLARING OUTWARDLY INTO ENGAGEMENT WITH A SHARP EDGE OF THE OPEN END OF THE SLEEVE THROUGH WHICH THE LEGS ARE EXTENDED IN FORMING A HEATER-CATHODE ASSEMBLY. AFTER THE HEATER AND A PORTION OF THE LEGS THEREOF OF THE HEATER-TAB ASSEMBLY HAVE BEEN INSERTED IN THE CATHODE, THE ARMS OF THE U-SHAPED TAB MEMBER ARE WELDED TO HEATER SUPPORT STRUCTURES MOUNTED ON TWO GLASS RODS, AND THE TRANSVERSE PORTION OF THE TAB MEMBER IS REMOVED.