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:
Sep. 29, 1981
Filed:
Dec. 05, 1979
Applicant:
Inventor:
Harold O Seigel, Don Mills, CA;
Assignee:
Scintrex Limited, Don Mills, CA;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G01B / ; E21B / ;
U.S. Cl.
CPC ...
356152 ; 33309 ; 33313 ; 175 45 ; 356148 ; 356248 ;
Abstract
A rotating target contains an appropriately shaped section of photoelectric material which detects the position of a beam of light which is incident on the target. The position of the beam is determined in terms of its distance from the center of rotation of the target and by its angular position relative to the vertical. The vertical direction is simultaneously determined relative to the rotating target using a gravity operated reference.