公开(公告)号：US3584182A

公开(公告)日：1971-06-08

申请号：US3584182D

申请日：1969-05-29

Applicant: GRIFFITHS ELECTRONICS INC

Inventor： VOLK J VINCENT ,  MCQUEEN JOHN

IPC: H01J9/18 ,  H01J19/46 ,  B23K11/00

CPC classification number: H01J9/18 ,  H01J19/46 ,  H01J2209/185 ,  H01J2893/0007 ,  Y10T29/49004

Abstract: Cathodes employed in an electron gun assembly are loaded and positioned in precise alignment relative to associated components of the gun assembly by means of a probe. The cathode loading assembly roughly positions the cathode within a supporting cylinder. An opening in the control grid receives a probe forming part of an air gauge having a float in its air column. A fine adjustment is made by operating a hand-wheel to precisely locate the cathode relative to the grid. The exact adjustment is indicated by positioning the float within tolerance markers while making the fine adjustment. The reading of the air gauge indicates back pressure imposed on the air escaping from the orifice of the probe. Once precisely located, a welding unit is activated, which moves the welding electrode into contact with the cathode support to secure the cathode by welding in its precise location. The welding assembly is retracted, the next cathode and cathode supports is placed into loading position, and the above operations are repeated wherein loading and welding of cathodes within an electron structure is performed in a rapid reliable and substantially automatic fashion.