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. 30, 1996
Filed:
Aug. 29, 1994
Applicant:
Inventors:
Steven L Geerlings, Zeeland, MI (US);
Mark J Bussis, Hudsonville, MI (US);
Assignee:
Prince Corporation, Holland, MI (US);
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G01C / ;
U.S. Cl.
CPC ...
33356 ; 3335 / ;
Abstract
A compass circuit has a magnetic field sensor adapted to be positioned in a vehicle near a source of varying magnetic fields. A source of correction signals is coupled to the compass circuit for providing correction signals applied to the compass circuit for correcting the heading display of the compass circuit when differing levels of magnetic field disturbance occurs to provide accurate heading information. In a preferred embodiment the source of correction signals includes a detector circuit coupled to the vehicle accessory for providing signals directly corresponding to the source of magnetic field interference.