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:
Oct. 26, 1982
Filed:
Aug. 04, 1980
Emanuel V Polizzi, Hartland, WI (US);
David G Lieder, Waukesha, WI (US);
General Electric Company, Schenectady, NY (US);
Abstract
In x-ray apparatus where the central ray of an x-ray beam must be made perpendicular to the planes of one or more image receptors, a central ray locator is coupled to the beam output port of an x-ray tube casing and the central ray is indicated when a luminescent spot occurs at the intersection point of cross hairs on a phosphor screen. A laser device then replaces the locator. Its beam simulates the central ray and coincides with it and provides a visual indication of it. The laser beam enables determining if the tube casing is moving in a straight vertical line by observing the movements of the laser beam light spot while it is projected on a plane surface. Procedures are disclosed for establishing the simulated central ray in perpendicularity with receptor planes.