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:
May. 02, 1989
Filed:
Dec. 16, 1987
Applicant:
Inventor:
William D Koenigsberg, Concord, MA (US);
Assignee:
GTE Laboratories Incorporated, Waltham, MA (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H01J / ;
U.S. Cl.
CPC ...
378138 ; 378137 ; 378207 ;
Abstract
X-ray apparatus of the type in which X-rays are generated by an electron beam impinging on a focal spot on a metal target. Heat from the focal spot is focused onto a lateral effect photodiode, the electrical output of which changes with changes in the position of the focal spot. This output is fed back to the electron beam deflection coils to change the direction of the electron beam and steer it back toward the original, intended position of the focal spot on the target.