Abstract: A visual display comprises a plurality of electro-optical transducers, each transducer comprising a light-reflective element mounted to an elastic, substantially planar membrane, and electromagnetic means for moving the light-reflective element pivotally, rotationally and axially relative to the plane of the supporting elastic membrane. Means is also provided for directing focused light rays from a single light source upon the light-reflective elements, filtering the light rays through selected color discs and impinging the colored light rays upon a display screen.

Abstract: A self-steering mechanism for a sailboat is disclosed in which a chain connects the boom to a stabilizer, and transmits a force proportional to the resultant force of the velocity and angle of the wind caught by the mainsail. The stabilizer presses against a pressure sensing member linked to the boat's rudder, causing the rudder to rotate to set and maintain a tack for a particular wind velocity and angle. The steering mechanism automatically responds to changes in the wind by adjusting the rudder to keep the boat on its original course, or by setting a new tack.