Abstract: A superconducting fault current limiter includes a first superconducting module connected to an input terminal of a power system, a second superconducting module connected to an output terminal of the power system, and a connecting member interposed between the first and second superconducting modules. The first superconducting module and the second superconducting module each include two superconducting coils. The input terminal is connected to an end of the first superconducting module, and the output terminal is connected to an end of the second superconducting module. The end of the second superconducting module is disposed geometrically opposite the end of the first superconducting module.

Abstract: Disclosed herein is an automatic pulse plasma welding method and apparatus for forming a lap joint between membrane sheets, which applies plasma welding to a lap joint between membrane sheets to improve working efficiency and productivity, and which provides optimal welding conditions to the respective regions of the lap joint between membrane sheets to improve welding quality.

Abstract: Provided is a superconducting coil capable of reducing a magnetic field perpendicularly irradiated to a wide surface of a superconducting wire composing a coil of a superconducting electric device by winding a low current density coil, driven with a current density lower than that flowing through a main coil, on a line extending from the main coil. The superconducting coil includes: a main coil driven with a current density flowing by entering current; and a low current density coil located on a line extending from upper and lower ends of the main coil, and series connected to a coil having the same shape as a portion of the main coil to be driven with a current density lower than that flowing through the main coil.

Abstract: The present invention relates to a method of measuring the thickness of a thin film layer using an infrared thermal imaging system. The object of the present invention is to provide a method of measuring the thickness of a thin film layer fast in such a way as to obtain the two-dimensional (2-D) thickness distribution of the thin film layer at one time by measuring infrared spontaneous light emitted from a target surface using an infrared imaging camera.

Abstract: An adjustable step trainer including two straps and more than one slat through which the straps are passed. Each end of the slat has a fixing section through which the strap is passed. A press unit is disposed in a chamber of the fixing section for pressing and fixing the strap.

Abstract: An oil storage tank installed on the seabed under a marine structure with a working tower, an incinerating tower, a heliport, an oil separator, a drilling deck, a production deck, and a bottom deck, including a inner vessel and an outer vessel which are spar-type coupled to each other, an oil storage chamber formed in the inner vessel, a permanent ballast tank provided in the lower portion between the inner and outer vessels, and permanently holding pieces of iron, orecrete, concrete, sludge, etc., a sea water ballast tank provided on a separating panel, and an air buoyancy tank provided on the tank in such a manner that the overall tank acts as a buoy and the oil storage chamber is bottomless.

Abstract: Disclosed herein is a self-diagnosis type welding carriage control system for automatically controlling welding conditions and implementing an oscillation motion. The welding carriage control system includes a main controller for a database, a remote control panel controller, a welding machine and condition controller, motion controllers for oscillation and travel motions, and a digital signal processing controller for managing memories for the respective controllers. The controllers are each provided internally with a central processing unit, and a dual port random access memory so as to share neighboring central processing units and memories through a versa module eurocard bus.

Abstract: A catalyst for effectively removing NOx by using NH3 as a reducing agent is disclosed. Particularly, a vanadia impregnated onto Ti-PILC (titania-pillared interlayer clay) is disclosed, which is prepared by the generally known technology. More specifically, a V2O5/Ti-PILC catalyst is disclosed, in which NOx contained in the flue gas from an electric power plant and the like (an excessive amount of SO2 being present in the flue gas stream) is reacted with NH3 (which is injected as a reducing agent) over a vanadia impregnated onto a Ti-PILC, so that they can be converted into harmless nitrogen and water. The V2O5/Ti-PILC catalyst is employed for reducing NOx contained in the exhaust gas stream as well as the large amounts of SO2 into nitrogen and water. The catalyst is prepared by pillaring a titania to a clay by a pillaring method.

Abstract: The present invention relates to a polygonal section spar platform for drilling and production, which can raise efficiency in process and production and reduce manufacturing costs by making a section of a drilling and production spar platform in a polygonal shape. The drilling and production spar platform comprises a ballast tank, a spar hull, a mooring fairleader, a trim tank and a fixed ballast, wherein the spar hull, which is an underwater portion of the drilling and production spar platform, has a section being in the form of a polygon. By such spar platform, the present invention can largely increase the manufacturing performance and production and promote a general operational efficiency.

Abstract: An oil storage tank installed on the seabed under a marine structure with a working tower, an incinerating tower, a heliport, an oil separator, a drilling deck, a production deck, and a bottom deck, including a inner vessel and an outer vessel which are spar-type coupled to each other, an oil storage chamber formed in the inner vessel, a permanent ballast tank provided in the lower portion between the inner and outer vessels, and permanently holding pieces of iron, orecrete, concrete, sludge, etc., a sea water ballast tank provided on a separating panel, and an air buoyancy tank provided on the tank in such a manner that the overall tank acts as a buoy and the oil storage chamber is bottomless.

Abstract: A weaver for a welding torch required for executing right and left weaving works of welding torch which has been executed by a welding operator for automating the welding work as an automatic welding apparatus so as to execute both straight weaving and angular weaving.

Abstract: A shielding gas pre-flow time control system for a gas metal arc welder for generating an arc simultaneously with the turning on of a torch switch for directing a torch to a normal position while maintaining a sufficient pre-flow time of shielding gas for more than one (1) second. The gas metal arc welder includes a welding power source, a wire feeding device and a welding torch in which, when the torch switch is firstly turned on, only the shielding gas solenoid valve is activated to cause the shielding gas solenoid valve is actuated to cause the shielding gas to be pre-flowed. When the switch is secondly turned on, during the pre-flow time, the wire feeding device is operated and simultaneously a voltage is applied to the wire being fed and an arc is generated so as to start the welding. When the torch switch is turned off, wire feeding device is stopped, the shielding gas feed is stopped and the welding arc is stopped, all at the same time.

Abstract: The present invention relates to power and free conveyor capable of loading a carrier, and particularly the present invention relates to a power and free conveyor in which a carrier moving is made possible by a power line interrupter without a separate device, a carrier and dog projection preventing device is not needed on a group rail, and particularly, the contact noise generated between the dog and a forcing-up cam is eliminated during the stop of the carrier, so that the working environment should be improved, and that disorders should be reduced.

Abstract: An automatic welding apparatus and an automatic milling apparatus for machining welding grooves in order to weld a three-dimensional surface such as a ball tank or the like are disclosed. A welding wire spool is accommodated within a case and a cover to prevent the welding wire from being oxidized and from being contaminated with foreign materials. The automatic milling apparatus is installed to form welding grooves on the both sides of the objects to be welded, in the case where a welding is performed on a three-dimensional curved surface. A guide roller having a handle is installed to control the machining depth of the grooves, and an idling type nylon guide roller is installed in closed contact with the shaft of a cutter, thereby adjusting the distance between the rail and the groove, and adjusting the deviations of the depth of the grooves, which are caused by the machining inaccuracies due to the deviations of the three-dimensional curvature.

Abstract: An automatic welding apparatus and an automatic milling apparatus for machining welding grooves in order to weld a three-dimensional surface such as a ball tank or the like are disclosed. A welding wire spool is accommodated within a case and a cover to prevent the welding wire from being oxidized and from being contaminated with foreign materials. The automatic milling apparatus is installed to form welding grooves on the both sides of the objects to be welded, in the case where a welding is performed on a three-dimensional curved surface. A guide roller having a handle is installed to control the machining depth of the grooves, and an idling type nylon guide roller is installed in closed contact with the shaft of a cutter, thereby adjusting the distance between the rail and the groove, and adjusting the deviations of the depth of the grooves, which are caused by the machining inaccuracies due to the deviations of the three-dimensional curvature.

Abstract: An automatically controlled dynamic vibration absorber in which the characteristic frequency of the vibration absorber is adjusted automatically to the frequency of vibration from a vibrating source to dissipate the vibration by mating a response vibration with a forced vibration.