Abstract: A wing type windmill is provided with a rudder able to constantly facing to the wind direction controlled by turn table having a twin vaned tail wing and a concave upwardly curved lead rail. The vertically shafted windmill has several sail type wing blades each of them can develop or shrink its surface to face or offset the wind direction following the up and down motion of the end roller of the connecting rod along the lead rail. The produced rotating torque by individual wing blade is imparted to a centrifugal fly wheel hub from time to time and this non-uniform torque and unstable rotating speed of the windmill is unified and governed stably by the fly wheel effect of a plurality of fly wheels filled with a weighty substance.

Abstract: An elastic energy storage device has an energy storage unit which has an axial rod penetrating through a plurality of rotary disks and spiral springs. One side of each rotary disk is protruded with an outer edge buckling post and another side thereof is installed with an inner edge buckling post. Each two rotary disks are installed with a spiral spring. The casing is installed with a unidirectional power output shaft for driving the first rotary disk of the energy storage unit to rotate. The speed change box has an input shaft and an output shaft. The input shaft is connected or engaged to the rotary disk; and one of the rotary disks of the energy storage unit at an innermost side has a function of driving the input shaft to rotate. Thereby, the at least one spiral spring stores energy through a flywheel and then release the energy steadily.

Abstract: A connector includes an elongated cover having a top and two shoulders at two ends of the top thereby forming a cavity between the top and each of the shoulders, each of the shoulders having an inwardly extending flange and a longitudinal hole in which is inserted a pivot pin, a base formed with a plurality of slots in each of which is fitted a spring partially protruded upwardly out of a respective one of the slots, both ends of the base having a longitudinal hole dimensioned to receive the pivot pin so as to pivotally connect the cover with the base, the base being formed with two recesses at two opposite ends thereof configured to receive the flanges of the cover, one of the recesses having a groove thereon, and a torsion spring fitted over an inner end of one of the pivot pin, with an upper end of the torsion spring bearing against a lower side of the top of the cover and a lower end of the torsion spring bearing against the groove of the base thereby forcing the cover to move upwardly to an inclined posi

Abstract: A socket for testing a plug-in type semiconductor having two rows of flat pins includes an elongated base having two rows of resilient conductive clamps positioned on the base and an elongated cover mounted on the base and having rows of openings correspondingly formed in the cover with respect to the conductive clamps. A push member is movably mounted between the cover and the base. A camming rod member is mounted between the cover and base for actuating the push member to depress the resilient conductive clamps, urging the resilient conductive clamps to contact the flat pins of the semiconductors when the flat pins are plugged into the socket. Each of the resilient conductive clamps has clamping faces parallel to the contacting faces of the flat pins of the semiconductor.

Abstract: The present invention relates to a logic training board assembly which includes a plurality of power distribution strips and a plurality of element terminal plates each of which can be connected into an assembly according to the user's need by a plurality of dovetail protrusions and dovetail recesses and each of the strips and plates providing a plurality of circular terminal slots which are arranged at a precise distance from each other for convenience in inserting DIP IC pins or other electronic elements even across the connecting portion of two adjacent plates, economizing space and allowing more electronic elements to be set on the surface of the board assembly in practical use.