Blinking sail windmill with safety control

Abstract

A vertical axis windmill is disclosed which includes a set of frames attached via horizontal bars to a vertical axis of rotation, each frame comprising a plurality of swinging windows, each swinging window comprising an upper horizontal bar, vertical side bars, and a plurality of additional horizontal bars; a plurality of blinking sails comprising sheets of lightweight material, wherein the upper edge of each blinking sail is fixed at a horizontal bar, each blinking sail being allowed to move by pivoting or bending relative to the horizontal bar; a gap control rod for each of the frames, connected to each of the swinging windows in the frame such that all swinging windows in the frame move synchronously as the gap control rod is moved; and one or more electronically controlled actuators capable of moving the gap control rods. The swinging windows stop the blinking sails from being blown to one side of the frames, where that one side is on the same side of each frame relative to the direction of rotation of the vertical axis windmill. The swinging windows are movable toward that same side of the frame such that there is a variable gap to allow part of the air to pass through in the downwind direction. The electronically controlled actuators can be programmed to respond to available sensors including sensors for wind speed, wind direction, swinging window position, and windmill power output.

Dependencies are inferred from the claim text.