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. 03, 1977
Filed:
Jun. 23, 1976
Applicant:
Inventors:
Einar Asmundsson, Middle Haddam, CT (US);
Donald S Grosso, West Hartford, CT (US);
Assignee:
Teleco Inc., Middletown, CT (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G01V / ; G01C / ; E21B / ;
U.S. Cl.
CPC ...
340 / ; 340 / ; 33304 ; 33313 ; 175 45 ; 340 / ;
Abstract
A borehole sensor is presented including a three axis gimbal device for determining (1) a vertical plane, using the force of gravity as a reference, (2) a horizontal plane, using the force of gravity as a reference, and (3) the north direction, using the earth's magnetic field as a reference. A motor drive system drives parts of the mechanism to desired positions about the three axes, and error transducers determine the deviation from desired positions about the axes and provide feedback to the motor drive system to eliminate the error.