Abstract: A wind power generation device includes a wind blocking structure, which is in a box-shaped structure fixed on ground by a bottom plane thereof; a wind vane rotating body including a rotating shaft and vanes fixed on the rotating shaft and arranged at equal angle intervals, wherein the rotating shaft is mounted on two bearings of the wind blocking structure, and the vanes are rotatable inside the box-shaped structure; a power generator connected to the rotating shaft and fixed on the box-shaped structure by a linking plate. When wind blows to the wind blocking structure to rotate the wind vane rotating body, the power generator is driven by the rotating shaft to generate electrical power. The wind power generation device can include at least two wind vane rotating bodies, or area enlarging structures added on the vanes, to increase windward areas of the vanes.

Abstract: A computing appliance for geometric planimetry is provided, comprising a container, a vertical dividing rule, a horizontal dividing rule, a horizontal point line and a middle point line. A fluid is filled into the container, and the vertical dividing rule, the horizontal dividing rule, the horizontal point line and the middle point line are configured on a same instructing surface of the container and arranged on each of the periphery surrounding like a rectangle. When the container is vertically disposed, a fluid level is aligned with the horizontal point line. And, when the container is tilted to form at least one angle, an area of at least one geometric shape can be derived by employing the vertical dividing rule, the horizontal dividing rule, the horizontal point line and the middle point line.

Abstract: A wind power generation device includes a wind blocking structure, which is in a box-shaped structure fixed on ground by a bottom plane thereof; a wind vane rotating body including a rotating shaft and vanes fixed on the rotating shaft and arranged at equal angle intervals, wherein the rotating shaft is mounted on two bearings of the wind blocking structure, and the vanes are rotatable inside the box-shaped structure; a power generator connected to the rotating shaft and fixed on the box-shaped structure by a linking plate. When wind blows to the wind blocking structure to rotate the wind vane rotating body, the power generator is driven by the rotating shaft to generate electrical power. The wind power generation device can include at least two wind vane rotating bodies, or area enlarging structures added on the vanes, to increase windward areas of the vanes.

Abstract: A pneumatic vertical transportation device comprises an expandable cylinder, a carriage rack, an air piping controller, and an air exhauster. The expandable cylinder includes a bellow body, with one end hanging carriage rack and the other end connected with a fixing plate. The expandable cylinder is connected with the air piping controller. While the carriage rack is rising, the air exhauster draws air from the bellow body through the air piping controller to gradually decrease pressure inside. Once pressure difference exceeds weight of the carriage rack, the carriage rack begins to rise. Volume of the expandable cylinder is reduced such that the lower disc of the expandable cylinder approaches top, and the expandable cylinder is maintained at low pressure state. While the carriage rack is descending, air is fed into the expandable cylinder through the air piping controller to gradually expand the bellow body, letting the carriage rack descend.

Abstract: A method of automatically extracting energy from flowing liquid and a device using the same are disclosed. The device includes a paddle rod and a swing device. The paddle rod includes two paddles to bear a pushing force of flowing liquid. When the paddle rod is swung, one of the two paddle enters water and the other paddle leaves from water surface. When the paddle in the water bears a pushing force of flowing liquid to drive a rotary body to swing, the paddle rod moves upwardly and leaves the water surface, and the other paddle enters water to bear the pushing force, and after the rotary body is driven to swing reversely, the paddle rod moves upwardly and leaves water surface, and at the same time the paddle enters the water to bear the pushing force, to drive the rotary body to swing reversely.

Abstract: A device for accumulating atmospheric pressure includes a supporting device, at least two expandable chambers, a five-opening air valve, and an exhauster. The expandable chambers are installed on the supporting device. The number of the expandable chambers is an even number. The expandable chambers are uniformly arranged at two opposite sides of the supporting device. The five-opening air valve is connected with the expandable chambers to communicate with the internal spaces of the at least two expandable chambers, and receives atmospheric pressure. The exhauster connects and communicates with the five-opening air valve. According to the switching state of the five-opening air valve, the exhauster exhausts the internal space of one of the expandable chambers through the five-opening air valve or the atmospheric pressure inflates the internal space of one of the expandable chambers through the five-opening air valve, thereby driving the supporting device.

Abstract: A method of automatically extracting energy from flowing liquid and a device using the same are disclosed. The device includes a paddle rod and a swing device. The paddle rod includes two paddles to bear a pushing force of flowing liquid. When the paddle rod is swung, one of the two paddle enters water and the other paddle leaves from water surface. When the paddle in the water bears a pushing force of flowing liquid to drive a rotary body to swing, the paddle rod moves upwardly and leaves the water surface, and the other paddle enters water to bear the pushing force, and after the rotary body is driven to swing reversely, the paddle rod moves upwardly and leaves water surface, and at the same time the paddle enters the water to bear the pushing force, to drive the rotary body to swing reversely.

Abstract: A device for retrieving energy of flowing water for the riverside is disclosed. The device uses a rotating disk to respectively connect with a first blade and a second blade through two rotating bodies. The first blade and the second blade are respectively located at the first position of an upstream side and the second position of a downstream side. Water pushes the first blade under the surface of water to swing from the first position to the second position, thereby rotating the rotating disk by a rotating distance. Thus, the second blade originally arranged over the surface of water reversely swings to the first position. Then, the second blade sinks in the water. Water pushes the second blade to swing to the second position, and the first blade rises and leaves the surface of water to swing to the first position.

Abstract: A device for accumulating atmospheric pressure includes a supporting device, at least two expandable chambers, a five-opening air valve, and an exhauster. The expandable chambers are installed on the supporting device. The number of the expandable chambers is an even number. The expandable chambers are uniformly arranged at two opposite sides of the supporting device. The five-opening air valve is connected with the expandable chambers to communicate with the internal spaces of the at least two expandable chambers, and receives atmospheric pressure. The exhauster connects and communicates with the five-opening air valve. According to the switching state of the five-opening air valve, the exhauster exhausts the internal space of one of the expandable chambers through the five-opening air valve or the atmospheric pressure inflates the internal space of one of the expandable chambers through the five-opening air valve, thereby driving the supporting device.

Abstract: A computing appliance for geometric planimetry is provided, comprising a container, a vertical dividing rule, a horizontal dividing rule, a horizontal point line and a middle point line. A fluid is filled into the container, and the vertical dividing rule, the horizontal dividing rule, the horizontal point line and the middle point line are configured on a same instructing surface of the container and arranged on each of the periphery surrounding like a rectangle. When the container is vertically disposed, a fluid level is aligned with the horizontal point line. And, when the container is tilted to form at least one angle, an area of at least one geometric shape can be derived by employing the vertical dividing rule, the horizontal dividing rule, the horizontal point line and the middle point line.

Abstract: In a cutting device for cutting a round, a transparent substrate is arranged on an object to be cut. A sleeving tube is arranged on the transparent substrate. An end of a transverse rod penetrates through the sleeving rod and extends to over the object. The position of the transverse rod in the sleeving rod is adjusted by a locking member. The other end of the transverse rod is fixed to a cutting assembly. The cutting assembly selectively touches the object. A rotating assembly is combined with the transparent substrate and penetrates through the transparent substrate. When the rotating assembly is pressed to touch the object and the rotating assembly rotates on the object to rotate the transparent substrate, the transverse rod moves the cutting assembly to perform a round-cutting operation on the object or paint a round line on the object.

Abstract: A pneumatic vertical transportation device comprises an expandable cylinder, a carriage rack, an air piping controller, and an air exhauster. The expandable cylinder includes a bellow body, with one end hanging carriage rack and the other end connected with a fixing plate. The expandable cylinder is connected with the air piping controller. While the carriage rack is rising, the air exhauster draws air from the bellow body through the air piping controller to gradually decrease pressure inside. Once pressure difference exceeds weight of the carriage rack, the carriage rack begins to rise. Volume of the expandable cylinder is reduced such that the lower disc of the expandable cylinder approaches top, and the expandable cylinder is maintained at low pressure state. While the carriage rack is descending, air is fed into the expandable cylinder through the air piping controller to gradually expand the bellow body, letting the carriage rack descend.

Abstract: A device for retrieving energy of flowing water for the riverside is disclosed. The device uses a rotating disk to respectively connect with a first blade and a second blade through two rotating bodies. The first blade and the second blade are respectively located at the first position of an upstream side and the second position of a downstream side. Water pushes the first blade under the surface of water to swing from the first position to the second position, thereby rotating the rotating disk by a rotating distance. Thus, the second blade originally arranged over the surface of water reversely swings to the first position. Then, the second blade sinks in the water. Water pushes the second blade to swing to the second position, and the first blade rises and leaves the surface of water to swing to the first position.

Abstract: A measurement tool for circumference includes at least one disk with a circumference thereof provided with a through hole; a straightedge provided with a fixed post and a plurality of scales, and the fixed post penetrates through the through hole to fix the disk to the fixed post; and a hitching line with one end thereof penetrated by the fixed post, and the other end of the hitching line surrounds the disk or straightens along the straightedge. Thus, a string makes a circle around the circumference, whereby the string is marked an index corresponding to the fixed post, and then the string straightens along the straightedge, and a length of the circumference of the disk is obtained according to relative positions of the scales and the index.

Abstract: A device for automatically generating energy arranged in a water tank includes a buoy sinking in a water tank. Sides of the buoy are provided with a water inlet and a water outlet, which respectively connect with a tube body and a three-way tube. The tube body and the three-way tube are respectively provided with two valves. Each valve connects with a floating ball. When the buoy sinks in the water tank, each floating ball floats to close the valves, so that the liquid within the buoy is drained from a side through hole of the three-way tube to raise the buoy to a water level of the liquid, and each floating ball looses the valves, and the liquid flows into the buoy through the water inlet, and the buoy sinks in the water tank again. The buoy endlessly floats and sinks to generate electricity.

Abstract: A device for automatically generating energy arranged in a water tank includes a buoy sinking in a water tank. Sides of the buoy are provided with a water inlet and a water outlet, which respectively connect with a tube body and a three-way tube. The tube body and the three-way tube are respectively provided with two valves. Each valve connects with a floating ball. When the buoy sinks in the water tank, each floating ball floats to close the valves, so that the liquid within the buoy is drained from a side through hole of the three-way tube to raise the buoy to a water level of the liquid, and each floating ball looses the valves, and the liquid flows into the buoy through the water inlet, and the buoy sinks in the water tank again. The buoy endlessly floats and sinks to generate electricity.

Abstract: In a cutting device for cutting a round, a transparent substrate is arranged on an object to be cut. A sleeving tube is arranged on the transparent substrate. An end of a transverse rod penetrates through the sleeving rod and extends to over the object. The position of the transverse rod in the sleeving rod is adjusted by a locking member. The other end of the transverse rod is fixed to a cutting assembly. The cutting assembly selectively touches the object. A rotating assembly is combined with the transparent substrate and penetrates through the transparent substrate. When the rotating assembly is pressed to touch the object and the rotating assembly rotates on the object to rotate the transparent substrate, the transverse rod moves the cutting assembly to perform a round-cutting operation on the object or paint a round line on the object.

Abstract: A measurement tool for circle area includes a cylinder, a rectangular container and a pipe. The cylinder is provided with a first opening and filled with a liquid. The rectangular container is provided with a second opening, and at least side surface of the rectangular container is provided with at least scale table. The pipe is arranged on the cylinder and the rectangular container and connected with the first opening and the second opening. When the cylinder is tilted, the liquid flows to the rectangular container through the pipe, and a volume of the liquid in the rectangular container is figured out according to a length, a width and a height of the rectangular container and the scale table. The volume equals an inner-cylinder volume of the cylinder. An inner-circle area of the cylinder is obtained according to the inner-cylinder volume and a height of the cylinder.

Abstract: A measurement tool for circumference includes at least one disk with a circumference thereof provided with a through hole; a straightedge provided with a fixed post and a plurality of scales, and the fixed post penetrates through the through hole to fix the disk to the fixed post; and a hitching line with one end thereof penetrated by the fixed post, and the other end of the hitching line surrounds the disk or straightens along the straightedge. Thus, a string makes a circle around the circumference, whereby the string is marked an index corresponding to the fixed post, and then the string straightens along the straightedge, and a length of the circumference of the disk is obtained according to relative positions of the scales and the index.

Abstract: A measurement tool for circle area includes a cylinder, a rectangular container and a pipe. The cylinder is provided with a first opening and filled with a liquid. The rectangular container is provided with a second opening, and at least side surface of the rectangular container is provided with at least scale table. The pipe is arranged on the cylinder and the rectangular container and connected with the first opening and the second opening. When the cylinder is tilted, the liquid flows to the rectangular container through the pipe, and a volume of the liquid in the rectangular container is figured out according to a length, a width and a height of the rectangular container and the scale table. The volume equals an inner-cylinder volume of the cylinder. An inner-circle area of the cylinder is obtained according to the inner-cylinder volume and a height of the cylinder.