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:
Nov. 06, 2007
Filed:
May. 09, 2003
Francois Luc, Sydney, AU;
Francois Luc, Sydney, AU;
Sercel Australia Pty Ltd., , AU;
Abstract
A method for compensating the effect of gravity on seismic sensors such as geophones and a gravity effect-free seismic sensor are disclosed. The gravity effect-free seismic sensor of the present invention includes primary sensor () operatively responsive to seismic movements and hence generating a seismic signal by having a coil placed in a magnetic field in a first axis of sensitivity (); an auxiliary sensor () operatively responsive to a gravity field for generating a tilt signal, thus provide current to the coil of the primary sensor () to induce a force on the coil that at least partially compensates for a weight of the coil, thus ameliorating or eliminating a gravity effect on the primary sensor ().