Abstract: A method for preparing azoxystrobin comprises the following steps: (a) mixing methyl (E)-2-[2-(6-chloropyrimidin-4-yloxy)phenyl]-3-methoxyacrylate, 2-cyanophenol, potassium carbonate, and 10-80 mol % of 1-methylpyrrolidine as a catalyst in an aprotic solvent to form a basic mixture, and reacting the basic mixture for 2-5 hrs at a temperature of 60-120° C.; and (b) subjecting the basic mixture after reaction in Step (a) to a first distillation under a reduced pressure of 80-120 torr at 70-80° C., to obtain azoxystrobin.

Abstract: A rotatable chair comprising a backrest unit, a seat plate unit, a supporting unit and a rotating unit; the rotating unit comprises an upper plate, a lower plate, a rotating disc, a connecting shaft, a first elastic ball and a handle; the backrest unit and the seat plate unit are fixed to the upper plate; the upper plate is provided with an upper locating hole; the supporting unit is fixed to the lower plate; the lower plate is provided with a plurality of lower locating holes; the rotating disc is disposed between the upper plate and the lower plate; the connecting shaft penetrates through the central position of the upper plate, the rotating disc and the lower plate at the same time; the first elastic ball comprises an elastic piece and a locating ball.

Abstract: A handrail assembly includes at least one connecting unit, and at least two extension units each connected with the connecting unit. The connecting unit includes a middle tube and two connecting tubes extended from two opposite ends of the middle tube respectively. Each of the connecting tubes has a surface formed with a plurality of elongate slits. Each of the connecting tubes has a periphery formed with an annular reinforcing rib to enhance resilience and fixedness of each of the connecting tubes. Each of the extension units includes a mounting pipe mounted on a respective one of the connecting tubes. Thus, the connecting units and the extension units are detached before assembly to facilitate and reduce the cost of storage, packaging and transportation of the handrail assembly.

Abstract: A foldable safety rail includes at least one fixing seat attachable to a wall, and at least one armrest body pivotally mounted on the at least one fixing seat. Thus, the armrest frame of the armrest body is located at the horizontal state rigidly and stably when in use so that a user holds safely the armrest frame of the armrest body so as to provide a support effect to the user. In addition, the armrest frame of the armrest body is movable to be parallel with the wall, so that the safety rail is folded when not in use, thereby saving the space occupied by the safety rail.

Abstract: A concise electronic timer is composed of an adjustable resistor, a supercapacitor and an electromagnetic relay. After a main power is turned off, electricity supplied from the capacitor to the relay will extend or actuate the operation of a load until the discharge of the capacitor is over. Incorporating the resistor with the other two elements, the discharge time of the capacitor can be altered linearly by the resistor, therefore, a linear arrangement of delay extension and time of activation is attained. The simple, compact and economical timer can be used for indoor and outdoor illumination, monitoring security systems, as well as actuating systems.

Abstract: A concise electronic timer is composed of an adjustable resistor, a supercapacitor and an electromagnetic relay. After a main power is turned off, electricity supplied from the capacitor to the relay will extend or actuate the operation of a load until the discharge of the capacitor is over. Incorporating the resistor with the other two elements, the discharge time of the capacitor can be altered linearly by the resistor, therefore, a linear arrangement of delay extension and time of activation is attained. The simple, compact and economical timer can be used for indoor and outdoor illumination, monitoring security systems, as well as actuating systems.

Abstract: A method of manufacturing a cylindrical high voltage supercapacitor. An anode and a cathode are provided. At least one bipolar electrode is interposed between the anode and the cathode, and a separator is intervened in each pair of the above electrodes. The anode, the cathode, the bipolar electrode and the separator, as placed in the above order, are wound concentrically into a roll, so as to form the cylindrical high voltage supercapacitor.