G - Physics
05
D
341/79
G05D 1/02 (2006.01) B63H 25/04 (2006.01)
Patent
CA 1122676
ABSTRACT OF THE DISCLOSURE A marine auto pilot employing a compass with a Hall- effect sensing element in conjunction with a magnetic circuit designed to provide a high intensity magnetic field; electrical circuitry designed to produce high servo-loop gain at frequencies lower than the normal sea wave frequencies, and lower gain at the normal sea wave frequencies; a D.C. Linear Motor drive system in conjunction with a rudder position feedback signal: and a linear ball-screw and nut gearing system for converting the high- speed output of the direct current drive motor to a low-speed high-torque drive at the rudder, having the nut and ball-screw connected through rolling contact balls.
275620
Dickey Baron C.
Smart & Biggar
LandOfFree
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