EXPLANATION - On a stout upright post A, is mounted a frame consisting of two posts, BB , and two beams, CC with a vane, D . A horizontal shaft, E , on the two frame posts, and from the head, or windward-end of this shaft, eight arms project which support eight sails, two of which, FF, appear in the drawing. These sails are so hung or mounted on the arms as to be movable; - each arm being round and passing through two cross-cleats which are attached to each sail. The horizontal shaft being hollow, a small iron rod passes through it, extending from G to H, where it connects with eight short arms, II. From the end of each short arm, a small rod extends back, and is connected and is connected to its parallel sail near the leeward corner thereof: so that by sliding the centre rod and arms to windward, the position of all the sails are changed, being thereby drawn up to the wind, that the main wheel may be put into position by the wind. The leeward end of the centre rod passes through the head of a vertical lever, G, which is connected to the vane by a pivot at J, (the vane being supported by two pairs of cleats, with space enough to admit the lever to pass between.) A nut or flanch is attached to the centre rod, each side of the lever, that the rod may be moved forward and backward thereby. A short vertical shaft extends from K to L, being supported by two beams. The knee, K M is so mounted that one arm thereof is connected by a small rod to the vertical lever G J, while the other arm connects with a vertical rod which extends down the centre of the vertical shaft, and connects with the ends of two knees, each of which is supported by the pivot O between two short arms which project from the vertical shaft for that purpose. The ends of the other arms of these knees are connected to two vertical planks or iron bars, P P; these planks being also partly supported by another set of arms and knees, Q Q. The vertical shaft has a pinion at the top, which is turned by the gear wheel, R, on the main shaft; and another pinion at the bottom, which communicates its motion to a horizontal gear-wheel, which is mounted on a short hollow cylinder, S, which turns on the main post, A, and carries a smaller gear-wheel, which give motion to another wheel on the head of a parallel shaft, T. From this shaft, the power and motion of the wind-wheel may be carried and communicated to any mill or machinery, in any direction. A small rope is attached to the vertical lever at U, and passes thence over the pulleys, V W X, and down the centre of the main upright post, but passing out at the side thereof a few feet from the ground, that it may be hauled down occasionally, when the mill is to be put into motion. The pulley, V, is connected to an iron weight, Y, is elevated; but its own gravity prevailing, it draws forward the lever, which drives forward the centre rod, with the short arms, I I, and thus draws the sails to the wind, and the wind-wheel is put in motion, which communicates motion to the shaft, K L, and causes the bars, P P, to press outward, by centrifugal force. By this the motion is regulated; for, whenever the motion of the wind-wheel exceeds the requisite velocity, the centrifugal force of the bars, overcoming the gravity of the weight, Y, (which ordinarily rests on the beam) depresses the rod K, by which the other arm of the knee forces back the lever G, with the centre rod and short arms, so as to through the sails partly out of the wind, thus preventing the increase of speed beyond the gauged rate. The arms of the wind-wheel are supported by wire braces, which meet the point Z.