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:
Oct. 17, 1978
Filed:
Oct. 13, 1976
William T Spurgin, Charlottesville, VA (US);
Sperry Rand Corporation, New York, NY (US);
Abstract
An illustrative embodiment of the invention provides a ship's steering system or helm adapted to provide a control signal to the ship's rudder such that the response of the rudder to the rotation of the helm is substantially non-linear from hardover to hardover wherein a portion centered about midship is linear such that hardover to hardover rudder can be ordered in less than one turn of the wheel. That is, less rotation of the wheel is necessary when large helm or rudder orders are required for heading changes and a greater rotation of the wheel about midships is necessary to desensitize rudder changes to large wheel rotations in order to make heading keeping easier.