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. 10, 1984
Filed:
Aug. 20, 1981
Applicant:
Inventor:
Charles Lescrenier, Wauwatosa, WI (US);
Assignee:
Other;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G03B / ;
U.S. Cl.
CPC ...
378 21 ; 378 25 ; 378 / ;
Abstract
An indicator for visibly defining the image plane located at the movable fulcrum of a tomography X-ray machine. The indicator includes a laser beam light source mounted for vertical movement along a rack and pinion assembly. As the fulcrum of the X-ray machine is raised or lowered with respect to the patient to take X-ray images along different horizontal planes, a pulse generator generates a signal responsive to the movement. The signal operates a servo-drive mechanism that moves the light source a corresponding vertical distance along the rack and pinion assembly.