Patent ID: 8040035
Filing Date: 2011-10-18
Classification: H01J,Y10T

Abstract:
1. A method of producing a cathode for use in an x-ray tube assembly comprising: machining an emission aperture into a cup emission surface portion of a cup structure, said cup structure comprising a cup base portion opposite said cup emissions surface portion, said emission aperture being surrounded by an essentially continuous emissions surface perimeter having ear portions and side bridges extending between the ear portions at the level of the cup emission surface portion; electro-discharge machining an electro-discharge machining slot into said cup structure to provide electro-discharge machining access to the interior of said cup structure; electro-discharge machining a transverse coil chamber into said interior through said electro-discharge machining slot such that said transverse coil chamber is formed between said cup base portion and said cup emissions surface portion, and at least partially covered by said cup emissions surface portion.