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:
Feb. 17, 2015
Filed:
Apr. 22, 2011
Applicant:
Bernard K Vancil, Beaverton, OR (US);
Inventor:
Bernard K Vancil, Beaverton, OR (US);
Assignee:
Other;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H01J 9/02 (2006.01); H01J 1/00 (2006.01); H01J 1/02 (2006.01); B23K 15/00 (2006.01); B23K 26/32 (2014.01);
U.S. Cl.
CPC ...
B23K 15/0006 (2013.01); B23K 15/0093 (2013.01); B23K 26/322 (2013.01); B23K 2201/20 (2013.01); B23K 2201/38 (2013.01);
Abstract
Wire-suspended thermionic cathodes provide lower power, further reduction in size, better stability and accuracy, and higher loading then conventional art. The cathodes are too small for use with conventional heaters and so are heated from behind by an electron beam or an intense light beam, such as laser light transmitted via optical fiber to the back of the cathode. The cathodes are electrically isolated from the focus electrode, thus allowing beam cutoff and modulation.