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:
Apr. 11, 1978
Filed:
Feb. 14, 1977
Applicant:
Inventor:
John Edmond Wolfe, Escondido, CA (US);
Assignee:
Burroughs Corporation, Detroit, MI (US);
Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
H01J / ;
U.S. Cl.
CPC ...
2504 / ; 250398 ;
Abstract
This disclosure relates to an electron beam generator and focusing mechanism including a high current thermionic field emission source to establish a high current electron beam and an electro-magnetic focusing means placed along the axis of the electron beam between the source and the target so as to provide a large image focal distance with the electron beam source being formed of a tungsten cathode which is coated with zirconium.