Abstract: A windmill blade system with two distinct blade ends with each comprising a center area having a series of identical projections equidistant from a central mounting orifice in the center area. Each of the projections consist of an upward and a downward facing triangle sharing a common base. When the blade units are combined by aligning the center areas of each, the triangles of the upper blade unit are above the plane formed by the center areas and the lower triangles of the lower base units are below that plane. With the lower blade unit projections forming a mirror image of the upper ones.The invention also contemplates a windmill having at least one of the blade systems rotating horizontally about a vertical shaft.

Abstract: A wind-driven machine having a hollow shell body supported on an upright rotatably mounted mast. The shell body is formed by multiple elongate shell segments circumferentially distributed about the mast. The shell segments are pivotally mounted for pivotal movement between closed and open positions.

Abstract: The tower comprises a base supported on a framework which mounts a wind powered turbine having a vertical axis of rotation. Air is channeled to the turbine rotor to cause counterclockwise rotation thereof by upper and lower wind deflectors. The wind deflectors include channels which cause the oncoming air to swirl in a counterclockwise motion into the rotor transmitting energy thereto. The vertical struts of the framework are also configured so as to deflect the oncoming air into the rotor in a counterclockwise direction. The rotor itself comprises columns of vertically spaced, radially extending scoops and radially extending curved blades to ensure highly efficient energy conversion. The rotor is formed with no center shaft to allow free flow of air therethrough.

Abstract: A high torque windmill is provided for use in converting wind power to usable energy, having a vertical axis about which a plurality of flexible vanes are journaled for rotation and spaced radially therefrom. The vanes are circumferentially spaced and mounted on a rigid circular, multi-sided support member which comprises the rotor journaled for rotation about the vertical mounting axis. Each vane comprises a conical member made of a dacron material and open at opposed ends thereof. A plurality of rods are held in pockets located about the conical surface for maintaining the desired conical configuration. These rods extend beyond each pocket at the smaller end of the cone, for fitting into tubular members fastened to the rotor to hold the vanes in place. Adjacent vanes are offset from the plane of rotation by 15 degrees in opposite directions (that is, up and down) in order to maximize the amount of captured wind power. The foregoing design provides a low speed high torque multi-directional windmill unit.

Abstract: A wind turbine has a shaft rotatable about an axis, and a plurality of blades mounted on the shaft and arranged to be rotated by wind and thereby rotate the shaft, wherein each of the blades has an outer portion which has an outer edge formed at the outer end of a radius with a center at the axis of the shaft and extends rearwardly from the outer edge over a circumference described from the center, and each of the blades has an inner edge which is rearwardly offset relative to the outer edge in a direction which is normal to the radius.

Abstract: A turbine apparatus for utilization of the kinetic energy of moving air or fluid is disclosed. The turbine apparatus is comprised of a rotor (20) mounted for rotation about a central axis (21) with respect to a support member (22) and connected to means (23) for converting rotation of the rotor (20) to usable energy. The rotor (20) includes a plurality of blades (40, 41, 42) disposed symmetrically about the central axis (21), each of the blades having an outer edge (43) and an inner edge (44) with respect to the central axis (21). In addition, each blade (40, 41, 42) has a curved portion (45) and a second portion (46), the curved portion (45) beginning at the outer edge (43) and terminating at the second portion (46). The curved portion (45) has a surface generally concave with respect to the central axis (21). The second portion (46) extends from the curved portion (45) and terminates at the inner edge (44).

Abstract: An improved wind collecting apparatus utilized for transforming wind energy to rotary motion. The rotary motion then can be utilized for driving an electric generator, for example. The apparatus generally comprises four semi-cylindrically shaped wind collecting blades connected to a shaft which is mounted for rotation about an axis of rotation and includes blade and cable support systems for reducing the effect of various destructive forces and for providing structural integrity, the apparatus also including flexibly connected joints to provide some flexibility in the supporting structure while maintaining the required structural integrity.

Abstract: A low drag and low profile fluid driven impeller can achieve a large diameter by utilizing notched cylindrical tube sections as impeller blades in stacked relationship on a common shaft. Simplicity and economy are inherent in the structure.

Abstract: Cup-type impellers are utilized on wind energy machines which are driven according to a first embodiment to rotate about a vertical axis and according to a second embodiment to rotate about a horizontal axis. In the vertical axis embodiment, the shaft driven by the cups is coupled to one or more offset generators by a gear. Preferably, a single generator mounted to rotate about a vertical axis is utilized. The rotor of the generator is supported by a low friction vertical bearing. In a second embodiment, a pair of cone supports is utilized to drive a horizontally disposed shaft. The shaft is oriented normally with respect to wind direction by utilizing a wind vane mounted on a separate support which detects wind direction and transmits information regarding wind direction to a platform supporting the drive shaft. Preferably, the generator is mounted directly on the drive shaft.

Abstract: A wind actuated turbine which causes a magnet-brush spinner and a copper foil covered disc spinner to counter rotate and generate electricity by the Faraday Principle.

Abstract: A windmill installation adapted to extract energy from natural wind currents is disclosed wherein a plurality of individual wind wheel modules are stacked vertically in a tower-like structure and are interconnected with one another to operate in a unitary manner. Each module has a rotor assembly which is disengageable from the rotor assemblies of other modules without interrupting the generation of power from the installation. A rotatable windshield is provided about the rotor assembly for improving output efficiency of the wind wheel and protecting the rotor assembly from damage in the event of excessively high wind speeds. The angular position of the windshield is determined by an automatic control system responsive to wind speed and direction.

Abstract: A vertical axis wind turbine is provided based on my co-pending application Ser. No. 890,998, filed Mar. 28, 1978, now U.S. Pat. No. 4,204,805. In this improved system the centrifugal forces of rotation produce no bending moments in the air foil spars. Also, the center of mass, the center of useful aerodynamic pressure and the center of main bearing supported are located at the same point to the support structure.

Abstract: A wind turbine for converting wind forces into usable energy has a main shaft rotatably mounted in the axis of rotation for the wind turbine, and a pair of coacting complementary longitudinally extending vane members are connected to each other by a plurality of support and transmission assemblies in the form of articulated members and to the main or driven shaft for driving engagement thereof. The coacting vane members may either have straight side edges or preferably have spiralled or helically shaped side edges which in the closed position are aligned and in abutment with each other to define and form a right circular cylinder in side elevation. The vanes are movable between a normally open starting position and a closed position to vary the total vane surface available for contact by the wind forces acting at any given time when the wind turbine is in operation.

Abstract: Wind power turbines are largely divided into vertical axis type wind power turbines and propeller type (horizontal axis type) wind power turbines. The present invention discloses a vertical axis type wind power turbine. The airfoil of blades in this vertical axis type wind power turbine is formed in such manner that, denoting a proper position on the airfoil chord line as a camber reversing position, a camber having a downward convex curvature is given between said position and a leading edge and a camber having an upward convex curvature is given between said position and a trailing edge so as to be a mean line and a rational thickness distribution is given to this mean line. This vertical axis type wind power turbine is formed by keeping the spanwise direction of the above mentioned blade parallel with a vertical rotary axis and fitting a plurality of blades at regular intervals at a distance to the vertical rotary axis through respective supporting arms.

Abstract: A fluid velocity actuated structure for a wind mill/water wheel, comprising an elongated cylinder with blades/fins hingedly supported thereon. When exposed to the driving force the one blade/fin will respond by assuming a position of least resistance thereto whereas the 180.degree. opposite blade/fin will assume a position of maximum resistance thereto. The hinge supports for the fins/blades has a swivel structure to permit resiliency in the cylinder to the fluid medium. From the rotating structure there is provided coupling means for converting the rotational force into electrical power. In use as a water wheel in a liquid stream, the cylinder has pump means associated there-with to adjust the depth of the structure in the fluid stream. When said structure is utilized as a wind mill, the cylinder is preferably upright and supported on a base. Within the base are a series of magnets that when electrically actuated, brakes the rotation of the cylinder.

Abstract: The invention is directed to a wind turbine normally located in a vertical position in operation to provide a propulsion energy force. In general, the wind turbine consists of a central rotor unit having a plurality of spaced, longitudinally extending scoop-like collector blades joined together so that no air can pass through them, to rotate a central power take off shaft when engaged by air currents. The air is directed to the rotor blades by straightly extending vertical air guide panels which intermittently surround the rotor unit and direct air currents to the rotor unit for rotation by the wind. The air guide panels are closed at the top and bottom by horizontally extending guide panels which are canted in complementary directions. The upper panel is tilted downwardly as it progresses inwardly and the lower panel is tilted upwardly on its inward extent to thereby increase the velocity and pressure of the wind as it is directed to the rotor unit.

Abstract: This invention relates to a wind fence, preferably of immense area, adapted to extract energy from the wind and convert it into commercial electricity. The fence of this invention comprises a module of unique design and construction. These modules are used in multiples to form fences up to five hundred (500') feet high up to five (5) miles long. The rotors within each module are vertically disposed and are interconnected, preferably by gears, to a fluid containing gear pump. The pump produces pressured fluid, and is conducted to a turbine operated by said fluid and which is connected to a conventional electrical generator. The depressurized fluid from the turbine is returned to said gear pump. In this invention the individual rotors always rotate in only one direction, regardless of the direction of the wind.

Abstract: This invention relates to a fixed geometry self starting wind turbine having a blade rotatable about a vertical axis. The blade is of a wide streamlined cambered airfoil shape and has a forward portion that includes a well rounded leading edge and thickness distribution that is conducive to high lift to drag ratios and having a high drag characteristic in reversed flows. The concave curvature of this camber line of said airfoil is directed to the rotational axis. The wide blade in combination with the well rounded leading edge, camber and airfoil thickness gives the turbine improved self-starting characteristics and causes the turbine to have improved acceleration characteristics through the intermediate speed range and up to full operating speed.

Abstract: The disclosed wind turbine is designed to optimize power output at a given wind velocity without corresponding increases in cost. The rotor carries a plurality of vertical vanes arranged at an acute angle to diametric lines through the rotor and the inner edges of the vanes, which are spaced from the rotor center. Each vane carries a plurality of fins extending on opposite sides of the vanes. In one embodiment, a wind-collecting shroud is movable to position an open side thereof in the upwind direction and is shaped to direct the wind more efficiently toward the vanes and fins. In a second embodiment, each vane is bent on a vertical axis to include two portions, at least the inner of which carries wind-collecting fins, at different angles to the rotor diameter, and no shroud is used.

Abstract: A windmill is disclosed, the windmill including a vertical shaft mounted for rotation about its longitudinal axis, a number of blades spaced circumferentially around the longitudinal axis, and being disposed generally parallel to the axis of rotation of the vertical shaft, and supporting arms extending radially outwardly from the vertical shaft for supporting the blades. The windmill also includes a first member connected to an upper end of one of the blades and defining a first surface having a leading edge with respect to the direction of movement of the blade and a trailing edge rearward of the leading edge, the leading edge being lower than the trailing edge. The first surface also includes an inside lateral edge and an outer lateral edge spaced radially outwardly from the inside lateral edge, the inside lateral edge being higher than the outer lateral edge.

Abstract: Wind turbines are largely divided into vertical axis wind turbines and propeller (horizontal axis) wind turbines. The present invention discloses a vertical axis high speed wind turbine provided with a starting and braking control system. This vertical axis wind turbine is formed by having blades of a proper airfoil fitted to respective supporting arms provided radially from a vertical rotary axis by keeping the blade span-wise direction in parallel with said axis and being provided with a low speed control windmill in which the radial position of each operating piece varies with a centrifugal force produced by the rotation of said vertical rotary axis.

Abstract: Wind turbines are largely divided into vertical axis wind turbines and propeller (horizontal axis) wind turbines. The present invention discloses a vertical axis high speed wind turbine provided with rotational speed control systems. This vertical axis wind turbine is formed by having blades of a proper airfoil fitted to respective supporting arms provided radially from a vertical rotating shaft by keeping the blade span-wise direction in parallel with the shaft and being provided with aerodynamic control elements operating manually or automatically to control the rotational speed of the turbine.

Abstract: The disclosure teaches improvements in vertical axis wind turbine apparatus. The improved apparatus has a vertically rising exoskeletal frame which permits modular addition of supplemental turbine components to the apparatus. The apparatus is self-supporting, needing no bracing external of the frame, is relatively small and light weight, has vertical standards in the frame, a plurality of sets of horizontal stretchers integrating the standards and means for bracing the frame elements. The specification teaches the support of the axially disposed drive shaft and associated turbines by means of upwardly and radially inwardly extending arms which distribute the weight of the operating structure to the exoskeletal frame. Non-bearing guide means are provided to prevent lateral movement of the shaft and associated turbines. The apparatus may be provided in kit form which can be readily assembled or disassembled according to need.

Abstract: A fluid turbine designed for increased power output includes an annular housing provided with a semi-spherical dome for directing incoming fluid flow to impinge on a plurality of rotor blades within the housing fixed to a vertical output shaft. An angle on the order of between 5.degree.-85.degree., in the direction of rotation of the shaft, exists between the upper (leading) and lower (trailing) edges of each blade. The blades are manufactured from a plurality of aerodynamically-shaped, radially spaced ribs covered with a skin. The leading edge of each rib is curved, while the trailing edge is straight. The straight edge of the ribs in each blade approach a vertical plane through the vertical axis of the housing output shaft as the ribs progress radially inwardly towards the output shaft.

Abstract: A vertical axis wind driven prime mover has plural circumferentially spaced horizontal wind driven arms carried by a central hub which is attached to a central vertical axis rotational working shaft. Each wind driven arm carries multiple fixed blades or louvers which can extend horizontally or vertically on the arms. The louvers of each arm are constructed and arranged to act as impulse elements when the arm is moving with the wind on one side of the vertical axis machine and to form reaction motive elements when moving against the wind on the opposite side of the vertical axis machine. Each arm of the prime mover additionally includes fixed wind confining or pocketing members along its leading and trailing horizontal extremities at both the top and bottom thereof and at its inner and outer ends. Each arm carries a fixed angular vertical flange at its outer end to propel the arm in the proper direction when the arm is aligned with the direction of the wind.

Abstract: The present invention is related to an improved wind turbine particularly with the provision of a strengthened network axle pivoted upon an elevated lattice steel tower; and a few upper and lower rotor arms horizontally fixed onto said strengthened network axle--respectively onto upper portion and lower portion thereof; and a few blades which, being V shaped in cross section, are provided between said upper and lower rotor arms; and a transmission mechanism; being thus constructed that wind power is liable to be converted into mechanical power therefrom.

Abstract: An improved type of wind turbine comprising a rotating assembly attached to a central hub, which is supported for rotation in a horizontal plane about a vertical axis, in a bearing on top of a tower of selected elevation. The rotating assembly comprises at least two radial spokes or arms positioned from each other at equal angles in a horizontal plane. The outer ends of the arms are attached to a connector assembly which generally is in the form of a U-shaped member lying in a vertical plane. A long thin vertically oriented airfoil is mounted on the ends of each connector, the plane of the chord of the airfoil is perpendicular to the axis of the arm which supports it. A torque shaft is attached at the axis of the hub and passes axially downwardly through the tower to an energy conversion device mounted in a housing on the base, which supports the tower. The tower may be guyed by means of cables, etc. which are attached below the level of the rotating assembly.

Abstract: A wind powered apparatus which includes an external wind shielding shroud supported for rotation about a vertical axis; a rotor mounted for rotation about the same axis as the shroud and disposed partially within the shroud; and a stabilizer vane secured to the shroud on the outer side thereof. The shroud includes two halves, each of conical configuration, with the halves oriented in base-abutting relation to each other. Each shroud half includes a plurality of generally triangularly shaped, overlapping vanes having air escape spaces provided between the overlapped edges thereof. The rotor includes a plurality of circumferentially spaced blades, each oriented in a plane containing the axes of rotation of the shroud and rotor, and each defining an opening between its radially inner edge and the axes of rotation of the shroud and rotor.

Abstract: To reduce drag in a lightweight windmill, a vertical centrally located frame has three vertical windmill-vane arrays extending radially outward therefrom spaced circumferentially 120 degrees from each other about the rotatable framework. Each vane array includes a plurality of flat flexible sails rigged one under the other between leading and trailing horizontal arms in the array with an upper leading edge of each sail being directly fastened to a different one of the leading arms and a lower edge of each sail being fastened by flexible cords to a different one of the trailing arms so that when the wind blows in the direction of the leading arm, the sail billows outwardly to turn the framework but when the wind blows in the opposite direction the sails are lifted flat to provide low drag. In one embodiment, the arms are cables, stretched radially from the central vertical framework by other cables so that the entire structure is easily disassembled for shipment.

Abstract: A wind motor for the conversion of wind power to mechanical or electrical power includes a plurality of wind receptors which have valved passages therein for the passage of air therethrough during operation of the wind motor, especially when the receptors are moving against the wind, so as to diminish air resistance (drag) opposing such movement, thereby increasing the efficiency of the wind motor.

Abstract: A wind rotor assembly is constructed as a variation of a Savonious rotor with two offset compound curve rotor plate members symetrically located about an axis and including a smaller S-shaped rotor at the axis in the space between the first and second rotor members. The assembly is used singly or in composite assemblies of several rotors on a common shaft, and it produces increased torque and operates at low wind velocity for use in the generation of electricity or in conjunction with a water pump or other applications.

Abstract: The invention relates to an energy conversion system for converting kinetic energy possessed by the wind into mechanical energy, using a particular compact design for vertical axis rotors in combination with a specially adapted tower structure.

Abstract: A fluid current motor having a rotatable shaft, a plurality of rotor arms rigidly mounted to and extending radially outwardly from the shaft and a plurality of pairs of superposed rotor panels which pairs are pivotally mounted respectively to each said rotor arm, may be improved by providing a rigid connector between each pair of panels moveably connecting a leading portion of one rotor panel in each said pair to a trailing portion of the second rotor panel in each said pair such that the rotor panels in each pair of rotor panels will coactingly pivot between resisting and non-resisting positions in response to a fluid current.

Abstract: Airfoil blade construction utilizing a spar assembly consisting of a primary and secondary spar interconnected by a web. A tower supports a rotor structure with outwardly curved airfoil blades carried at the outer ends of rotor arm members. Aerodynamic blade sections are formed with irregular, transversely extending openings to permit sliding disposition onto the blade spar assembly. The aerodynamic sections are joined by a suitable bonding agent. A suitable exterior is applied to the joined aerodynamic sections to reinforce the airfoil construction as well as to protect same from the elements. Fittings on the spar assembly enable attachment of the airfoil to a supporting structure.

Abstract: An omnidirectional windmill rotor is formed of a number (preferably seven) identical blades arranged symmetrically around a vertical shaft to which their upper and lower ends are secured. The blades are bowed outwardly at their wider central portions to define a sphere-like "chamber", each blade having a curved trailing edge projecting outwardly beyond the leading edge of the adjacent blade in order to form a "scoop" to receive the wind and induce rotation of the shaft. The lower end of each blade is twisted to form a deflecting portion on which the wind impinges to generate an upward movement of air within the chamber, serving to lighten the weight of the rotor on its bearing. In a modified version, a further projecting secondary blade is secured to each main blade to enhance the scoop effect and to provide a gap between the main and secondary blades.

Abstract: An apparatus employing an assembly of four flat vanes is disclosed for obtaining kinetic energy from a working fluid. The four flat vanes are disposed in two moveable pairs, that vary in frontal area in a working fluid, to produce torque about a central axis of rotation. One or more of the apparatuses are mounted on a vertical shaft unto which may be secured a pulley for distributing power in a conventional way.

Abstract: The windmill includes a vertically positioned support shaft, a plurality of elongated, molded arcuate plastic vanes which are vertically positioned and operatively connected to the support shaft, which vanes are slightly flexible so winds engaging the vanes will flatten the arc of some vanes and will make the arc of other vanes tighter to provide unbalanced rotational forces on the vanes, and means operatively connect to the shaft to provide power therefrom on shaft rotation.

Abstract: A sea wave powered electrical generating apparatus includes converging dams 9 to funnel and amplify wave energy, a pressure chamber 8 having an entrance/exit gate 11 and a turbine rotor disposed on a vertical axis above the pressure chamber. The arcuate zig-zag configuration of the turbine blades coupled with windows 3 at the tops and bottoms of the blades results in a double action mode of continuous rotation as the wave surges pass up through and back down through the rotor.

Abstract: A horizontal windmill includes a vertical tubular internal baffle member, a plurality of vanes responsive to the wind, mounted and positioned so that they revolve horizontally when the wind blows, partially rotating to resist the force of the wind in some positions during such revolution and being feathered with respect to it in other positions, and a vertical baffle located outside the path of rotation of the vanes, for increasing the wind speed as the wind is directed against the wind-resisting vanes. To secure the benefits of low cost of the structure for supporting such a windmill it is mounted on a building, with the vertical tubular member surrounding the building and being transparent to allow entry of light. In preferred embodiments of the invention various portions of the windmill are of light weight plastic material, such as the vanes and external baffles, and thin light weight tension members are employed to strengthen compression members and hold them in position.

Abstract: An electric battery powered automobile has a wind driven rotor device driving a generator to furnish supplementary power to batteries of the electrical power system of the automobile. The rotor device includes a power rotor having a pair of curved blades forming an overlapping, S configuration, and an outer series of turbine blades which pivot to provide minimum resistance when moving into the wind and provide maximum power when moving with the wind. The rotor device is mounted between two discs one of which serves as the armature of an electrical power generator. The generator has a plurality of parallel windings which at low speeds are connected in series to the batteries and, at high speeds, are connected in parallel to the batteries. The armature can be mounted separately and caused to couple with the rotor assembly through a clutch when the rotor has reached a desired speed.

Abstract: A vertical axis wind turbine which comprises in combination a stationary frame member, a rotatable shaft vertically journaled in the stationary frame member, a wind rotor positioned on the rotatable shaft with the wind rotor comprising a rotatable frame which has at least a pair of oppositely disposed arms radiating outwardly from the rotatable shaft with one arm having mounted thereon a concave surfaced wind catching member and the oppositely disposed arm having mounted thereon a convex surfaced wind deflecting member.

Abstract: Wind driven apparatus is disclosed in the form of a windmill, and in the form of an electric generating unit for a vehicle such as a boat or an airplane or the illustrated automobile. The apparatus includes a base mounted for rotation, preferably about a vertical axis, and along its periphery carrying a series of cones each with an open mouth for receiving air or other fluid, to rotate the base about its axis. The apex of the base deflects the air as the apex moves into the direction of flow of the air. A partition secured across the cone inwardly of the mouth limits the amount of fluid received in the mouth and prevents passage of the fluid to the apex of the cone. When installed as a windmill, the base is horizontally mounted atop a column or other support and is drivingly connected with a pump or electric generator, or other suitable apparatus.

Abstract: A wind motor for the conversion of wind power to mechanical or electrical power or other form thereof includes a plurality of wind receptors which have openings therein for the passage of air therethrough during operation of the wind motor, especially when the receptors are moving against the wind, so as to diminish air resistance (drag) opposing such movement, thereby increasing the efficiency of the wind motor.

Abstract: A moving-fluid-operated rotor for the utilization of a portion of the energy of a moving fluid, comprises a rotor rotatable about a vertical axis. The rotor has four blades, or wings, which may, for convenience, be described as semicylindrical elements. The first and second elements are of equal diameter and are arranged in the form of an S-shape with the diametral planes passing through the two edges of the semi-cylinder being coincident for the two wings. The other two wings are semi-cylinders of larger radius than the first two. They have their diametral planes coincident with those of the first two elements, and they are each substantially coaxial with one of the first two elements. Wind flow into the open ends of the first and third wings passes along the curvature of these elements and is redirected into the corresponding curvatures of the second and fourth wings, so that the wind exerts a forward pressure on one set, and a reverse pressure on the opposite set, providing additive torque to the rotor.

Abstract: An electrically operated vehicle provides a series of rotary members specially mounted to be partially exposed to external direct fluid currents and deflected fluid currents from a deflecting member. Each rotary member provides a series of substantially flat radial vanes circumferentially spaced in quadrature with the vanes of one rotating member angularly spaced with respect to the quadrature type vanes provided by an axially spaced rotary member. An axially spaced fluid conducting channel provides a vacuum at an axial end of a rotating member for reducing back pressure. An electrical control automatically responds to the differentially sensed electrical charges, within a pair of separate batteries for selectively connecting the battery with the lowest charge to the energy generating source and the battery with the greatest charge to energize an electrical motor driving the vehicle.

Abstract: A flywheel is provided having a plurality of radially extending spokes having axial bores. Mercury disposed in the axial bores moves toward the hub at low speeds to decrease the angular inertia of the wheel and toward the rim at higher speeds to increase the angular inertia. The flywheel may be used with the wind machine apparatus described or other rotating apparatus.

Abstract: An omni-directional windmill device comprising a plurality of blades circumferentially symetrically disposed with respect to each other. Each of the blades is generally helicoidal in shape. Also, a sleeve and ball type mounting device for a windmill device is disclosed.