Patent ID: 6252339
Filing Date: 2001-06-26
Classification: H01J,Y02W

Abstract:
An electron gun system including:an electron gun enclosure, with a feed-through element extending through a wall of said electron gun enclosure,an electron beam generating element housed within a filament module housing which is contained within said electron gun enclosure, said electron beam generating element being electrically connected to said feed-through element,an electron column including a column top plate and column walls, the column top plate including an aperture therethrough for an electron beam, and the gun enclosure being located above the column top plate,a port in said gun enclosure, said port including means for permitting direct removal of and replacement of said feed-through element through said port separate from said filament module housing and for permitting separate removal of said filament module housing from said electron gun enclosure without opening said electron column,said filament module housing and said feed-through element having spring-biased elements for automatically interconnecting electrically for quick installation and removal of said feed-through element from contact with said filament module housing, andmounting means secured to said electron gun enclosure for supporting said filament module housing without fasteners within said electron gun enclosure.