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. 20, 1982
Filed:
May. 29, 1981
Gordon R Cooke, Poway, CA (US);
The United States of America as represented by the Secretary of the Navy, Washington, DC (US);
Abstract
A device is disclosed for generating a rotatable magnetic field for calibing a compass. The field generated overcomes the earth's magnetic field and any other nearby magnetic field. A U-shaped housing has a first calibrated dial on the top horizontal member and a dial on the bottom horizontal member. The dials are mechanically linked to rotate in unison. Each dial contains a pair of bar magnets. The compass to be tested is positioned within the interior of the U-shaped housing. An adjustment knob is provided for turning the top and bottom dials and thereby permitting orientation of the four magnets within a range of 360.degree.. The accuracy of the compass can thereby be tested.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile