The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jun. 26, 1979
Filed:
Jan. 16, 1978
Applicant:
Inventor:
Raymond V Ely, Abingdon, GB;
Assignee:
Thor Cryogenics Limited, , GB;
Primary Examiner:
Int. Cl.
CPC ...
H02K / ;
U.S. Cl.
CPC ...
313 57 ; 250398 ;
Abstract
In X-ray apparatus having an electron beam gun producing a beam of electrons to be focussed on an X-ray producing target, in addition to a first focussing electrode on the gun structure, there is provided an auxiliary focussing means, comprising an electrostatic focussing electrode or electrodes or an electro-magnetic focussing coil or coils separately mounted to be adjustable in position in three orthogonal directions.