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:
Mar. 30, 1976
Filed:
Jan. 15, 1974
Kenneth H Ball, Tarzana, CA (US);
Arthur L Cole, Jr, Saugus, CA (US);
Walt Disney Productions, Burbank, CA (US);
Abstract
A guidance system for controlling the path of a boat comprising a first conductor disposed below the surface of water in a first elongated loop and connecting at the terminals thereof across an A.C. source of electrical signal and a second conductor driven in a quadrature with the first conductor and disposed in a second loop partly superposed over the first loop. A first and second orthogonal inductive coil, mounted in the boat along a plane parallel to the loop and a plane normal to the loop plane and substantially parallel to the centerline thereof sense the vertical and horizontal components of the electromagnetic field generated about the conductor loops to produce corresponding induced signals respectively varying in amplitude and phase according to the amplitude of the electromagnetic field and the position thereof. Such induced signal of the first and second coils are then clipped by signal limiters and connected to a common phase detector to produce a phase angle signal indicative of the amplitude of deviation of the coils relative the loops. The phase detector output signal is then connected to control a steering apparatus.