The link had a problem in a strange way. Don't click on the patent link or it will take you to some other patent. What you have to do is copy and past the link to the address bar and then it will work. Go figure
http://patft.uspto.gov/netacgi/nph-Parser?Sect1=PTO2&Sect2=HITOFF&p=1&u=%2Fnetahtml%2FPTO%2Fsearch-bool.html&r=39&f=G&l=50&co1=AND&d=PTXT&s1=%22harbor+branch%22.ASNM.&OS=AN/"harbor+branch"&RS=AN/"harbor+branch"************************************************************************ ************************************************************************ ************************************************************************ The personal submersibles mailing list complies with the US Federal CAN-SPAM Act of 2003. Your email address appears in our database because either you, or someone you know, requested you receive messages from our organization. If you want to be removed from this mailing list simply click on the link below or send a blank email message to: removeme-personal_submersibles@psubs.org Removal of your email address from this mailing list occurs by an automated process and should be complete within five minutes of our server receiving your request. PSUBS.ORG PO Box 53 Weare, NH 03281 603-529-1100 ************************************************************************ ************************************************************************ ************************************************************************
And yes folks we have pictures or drawings as well on USPTO site just click on the Images tab
United States Patent 5,306,183 Holt , et al. April 26, 1994
Propulsion systems for submarine vessels
Abstract A propulsion system for a submarine vessel includes a thruster including a magnetic flux generating stator, a shaftless propellant rotor, electrical conductors to supply electrical current to the thruster, an electronic controller to regulate such electrical current and a mounting unit to attach the thruster to the vessel. The stator includes a plurality of magnetizable pole pieces each associated with windings of conductive wires electrically connected to a power supply via the controller. The rotor includes a propeller ring containing a plurality of permanent magnets to be torqued by the magnetic flux from the stator pole pieces and a plurality of propeller blades. The rotation of the rotor (armature) provides position signals to the controller which then energizes the proper field windings of the stator to continue the motion and provide full torque regardless of rotor speed.
Inventors: Holt; John K. (Ft. Pierce, FL), Kennedy; Gregory C. (Ft. Pierce, FL) Assignee: Harbor Branch Oceanographic Institute Inc. (Ft. Pierce, FL) Appl. No.: 08/022,304 Filed: February 25, 1993