For example, the angle of attack might be decreased in anticipation of stronger wind to prevent overloading, and might be increased in anticipation of lower wind speed to prevent the sail from stalling. In the preferred embodiment, two such pairs of sails are connected in quadrature to a drive shaft to prevent the machine from coming to rest at a top-dead-center condition. 2. It is this cross-coupling between the two pairs of sails that causes the left-hand pair to operate at quadrature to the right-hand pair, thereby to prevent the apparatus from stalling at a top-dead-center condition. Another possibility for programming the position of the arm 50 with respect to the base 18 involves setting up wind velocity and direction sensors at stations positioned a short distance away from the apparatus in FIG. If a high windspeed is anticipated, it is possible to reduce the angle of attack of all the sail assemblies to zero by rotating the wheels 110 and 114 90 degrees from the position shown in FIG.
Dolor Sordo En El Pecho
1 would function as described above if the entire apparatus were rotated 90 degrees to render the base 18 vertical. An abrupt change of direction imposes greater stresses on the structure and results in a mechanical shock or impulse that jerks the entire structure. 2 in greater detail; it is typical of the left-hand portion of FIG. The central station 72 is shown in greater detail in FIG. 2 enter the central station of FIG. This is particularly useful during start-up and shut-down of the wind motor. This is accomplished through the use of one or more sails that are mounted to the motor for pivotal motion about an axis passing through the center of pressure of the sail. 827,889, Smith shows a current motor having an arm pivoted about a vertical axis and a blade mounted to the arm for pivotal motion about a different vertical axis. FIG. 6 shows the embodiment of FIG.
A parallelogram linkage is provided for turning the sail assembly about the first axis. In FIG. 5 it is seen that as the wheel 110 is rotated through 90 degrees about the pin 112, the amplitude of the motion of the cables Sb smoothly diminishes until, when the wheel 110 has been rotated through 90 degrees, the cables Sb do not move at all, even though the motion of the cables Pa is undiminished. Likewise, as the wheel 114 is rotated through 90 degrees about the pin 118, the motion of the cables Sa gradually diminishes, even though the motion of the cables Pb is not diminished. The bushing 134 is connected to a rod 136 that is connected to the cables 120, 122, so that as the rod 136 moves in response to changes in the speed of the wheel 94, the cables 120, 122 will be pulled so as to rotate the wheels 110, 114 in response to the speed of the wheel 94. As the wheel 94 turns ever faster, the bushing 134 is drawn higher on the axle 138, drawing the rod 136 upwardly.
To this end, a belt or cable 130 passes around the circumference of the wheel 94 and is used to drive a governor 132. Dolor muscular del pecho . The governor 132, as is well known, includes a bushing 134 that is drawn upwardly on the shaft 138 in relation to the speed of rotation of the shaft. The centers of a pair of opposite sides of the parallelogram are located on the first and second axis. Referring to FIG. 2, the first arm 22a and the third arm 22c move in quadrature, and the second arm 22b and the fourth arm 22d move in quadrature, as required by the cable connections shown in FIG.
This relationship can be restated as follows: The angle α1, of a first sail is made to be proportional to the angle θ2 of the arm of a second sail. K is the coupling coefficient, which is independent of the instantaneous values α1, α2, θ1 and θ2. 6, thereby providing maximum torque at the center of the stroke of the arm 46. The present inventor implemented this idea by connecting the arm 50 to the crank 60 by means of the connecting rod 56, which is attached to the arm 50 by the oar lock 58. As seen in FIG.
Tipos De Dolor Pdf
1 the angle α of the sail, which is determined by the position of the arm 50 relative to the base 18, is programmed by connecting the arm 50 to the crank 60 through the connecting rod 56, the present inventor recognized that more sophisticated programs can be executed. Another objective of the present invention is to provide a wind motor that turns an output shaft which cannot become stalled at a top dead center position. This results in a reduction of the forces exerted by the wind on the sails and other structural components of the motor. 1 were pivotally mounted atop the column 14, so as to permit the apparatus to pivot about the axis 16, it would be found that the aerodynamic forces would tend to cause the base 18 to pivot about the axis 16 due to the opposition of the load. Dolor de rodilla e inflamacion . This, in turn, permits the angle of the sail assembly with respect to the base to be varied in some deliberate way, and the resulting aerodynamic forces on the sail assembly will cause the arm to swing in response.
In deliberate contrast, at the same instant, the arms 22c and 22d are at the extremeties of their excursions, and the sails 28c and 28d are momentarily parallel to the local wind. 2 are identified as sails 1, 2, 3 and 4, respectively, and if the four arms 22a, 22b, 22c and 22d of FIG. 5, the coupling coefficients K1 and K2 are maintained equal and may be denoted by K. If, for purposes of exposition, the four sails 28a, 28b, 28c and 28d of FIG.
Fisioterapia A Domicilio
One way of doing this is by use of the coupling 87 which transmits upward and downward movements but which does not transmit the pivotal motion. The upward and downward motions of the lower end of the pipe 88 are converted to corresponding movements of the cables Pa, which move by equal amounts but in opposite directions. 2 and 5 it is seen that the angle of the sail assemblies 28c, 28d is determined by the position angle of the arms 22a, 22b; and likewise, the angle α of the sail assemblies 28a, 28b, as set by the cables Sa are determined by the angular position of the arms 22c, 22d, as transmitted by the cables Pb. Thus, the direction of the sails is controlled by relative movements of the cables Sa.
In these patents, a number of airfoil blades are rotatably mounted to a wheel, with the individual axes of rotation parallel to the axis of rotation of the wheel. A pulley 62 that rotates with the crankshaft 64 turns a pulley 66 that is mounted on the shaft of a generator 68 that is attached to the base 18. The flywheel 67 helps the device to avoid stalling in a top dead center position. In a preferred embodiment of the present invention, the angle of each sail is altered in quadrature to the angle of the arm on which the sail is mounted. The term “opposition” refers to a phase difference of 180 degrees, and is to be distinguished from the term “quadrature,” which refers to a phase difference of 90 degrees. A further objective of the present invention is to provide a wind motor in which there are no abrupt changes in the motion of the parts.
Finally, it is an objective of the present invention to provide a wind motor capable of reliable unattended operation. As will be seen below, the apparatus of the present invention delivers its power in a smooth and controlled manner, thereby prolonging the life of the device. It is thus seen that the right-hand pair of sails 28a, 28b of FIG. As will be seen below, the present inventor has selected this quadrature mode of operation to eliminate the possibility that the system will come to rest at a top-dead-center.
It will be recognized that the apparatus of FIG. This quadrature connection will then result in the arm oscillating back and forth with respect to the base in an undulating motion. The L-shaped rocker arms 76, 78 convert the vertical motion of the rods 80, 82 to lateral motion of the connecting rods 56a, 56b, respectively. The sail angle varies in an approximately sinusoidal manner, but is 90 degrees out of phase with the motion of the arm. Como aliviar el dolor muscular del cuello . 5 the connecting rod 104 is at top-dead-center position, but there is no possibility of the machine stalling, because the connecting rod 92 is supplying maximum power at that instant. There is no provision for rendering the device current-seeking. The T-shaped member 40 is also carried on the pin 26 for rotation about the vertical axis 24. The T-shaped member 40 is not otherwise connected to the arm 22 or to the base 18, and can rotate about the axis 24 with respect to those other members.
- En el ataque de ansiedad la persona hiperventila. La respiración es muy rápida
- Tomar una dieta equilibrada rica en frutas y verduras y limitar la cantidad de sal y azúcar
- Del Diagnóstico al Tratamiento
- Shackle connection and disconnection
- Inhala y, a medida que bajes, exhala poco a poco
- Evitar o reducir el progreso de algunos tipos de esclerosis múltiple
The angle α indicates the orientation of the sail assembly 28 with respect to the base 18, and, independently, the angle θ indicates the orientation of the arm 22 with respect to the base 18. By measuring α and θ from a direction corresponding to the wind direction (74 of FIG. In a preferred embodiment of the invention, the angle of the sail assembly with respect to the base is constrained to vary in quadrature with respect to the angle of the arm with respect to the base.