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:
Dec. 23, 2003
Filed:
Sep. 05, 2002
Applicant:
Inventors:
Yu-Feng Wei, Middlesex, MA (US);
Bruce Wilkinson, Gloucester, MA (US);
Scott K. Batchelder, Newbury, MA (US);
Assignee:
Rule Industries, Inc., Gloucester, MA (US);
Primary Examiner:
Int. Cl.
CPC ...
G01C 1/708 ;
U.S. Cl.
CPC ...
G01C 1/708 ;
Abstract
A self-balancing marine compass. A described embodiment includes a pivot assembly, a buoyant-magnetic chamber assembly, a reading card assembly, and a dome. The pivot assembly includes fulcrums, each of which fit within fulcrum holders located on an inner surface of the reading card assembly. The buoyant-magnetic chamber assembly is positively buoyant within the dome and includes pivots meeting with pivot axes of the fulcrum holders. This embodiment is also a no spin compass.