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:
Feb. 07, 1978
Filed:
Mar. 23, 1976
Applicant:
Inventors:
Michael K Russell, Prestbury, Cheltenham, EN;
Anthony W Russell, Leckhampton, Cheltenham, EN;
Assignee:
Other;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G01C / ; G01C / ;
U.S. Cl.
CPC ...
33312 ; 33313 ; 33318 ;
Abstract
An instrument for measuring the direction of a borehole in order to carry out a spatial survey thereof comprises a gyro-stabilized single-axis platform having its axis coincident with the axis of the borehole and three gravity sensors for measuring three components of gravity in the direction of the borehole axis and in two mutually perpendicular directions in a plane perpendicular to said axis.