Abstract: The invention relates to a floating structure, e.g. an offshore platform adapted for use in exploitation of submerged oil fields and the like purposes at offshore areas. The structure has a platform from which extended downwardly are columns carried by footings having buoyancy large enough to keep the platform afloat. Tension wires are extended through the footings for connection to the sea bottom in a diverging manner. Sinkers are provided at intermediate portions of respective tension wires so that the portions of the laters between the sea bottom and the points at which the sinkers are provided may exhibit sags. The sagged portions of the tension wires are expected to present a buffering effect to diminish the extraordinary large tension in the tension wires attributable to the movement of the platform. The up and downward movement of the platform is prevented by a riser pipe extended from the center of the platform.

Abstract: An ice-breaking apparatus for use in ships and barges operating on icy waters, including nozzles for jetting high pressure fluid, is disclosed. By impinging force or cavitation caused by the high pressure fluid jetted from the nozzles, grooves or cracks are formed on an ice floe, and then, the ice floe is broken from these grooves or cracks by the hull. This ice-breaking apparatus facilitates breakage of ice floes or the like, and when this ice-breaking apparatus is attached, ships or barges for operation on icy waters can be built without increasing dimensions or propulsion powers particularly for navigation on icy waters. The ice-breaking apparatus includes echo distance measuring apparatus for automatically controlling and maintaining the nozzles at optimum positions from the ice-surface.

Abstract: The present invention relates to an apparatus for breaking up a large construction such as a large ship, and comprises a transporter movable in straddling relation to a construction to be broken up, a frame body supported by said transporter and movable in vertical direction, a circulating rail mounted on said frame body, a rail mounted independently in the beam direction of the transporter on said frame, a suspension transporting device movable on said circulating rail and a device having a cutter means movable on said independently mounted rail.Said cutter is also constructed such that an operation room is provided at the forward end of an arm, which is movable three-dimensionally, through a rotary device, and on said operation room a guide rail is projected and said guide rail is supported for up and down rocking motion and rotary motion around a fulcrum located near the operation room and in turn a cutter is movably supported on said guide rail.

Abstract: A gas-liquid contact apparatus for contacting gas with liquid by dispersing air to form fine air bubbles in the liquid power with minimum consumption of power which comprises: a vessel in which liquid held; a perforated pipe with a plurality of apertures through which gas is ejected into the liquid; and a rotor with blades radially attached thereto within the vessel, each blade of which is positioned in parallel to the axis of the perforated pipe and passes in proximity to the apertures so that gas is sheared by said rotating blades immediately after it is ejected from the apertures.

Abstract: The present invention relates to a working method of breaking up a ship, particularly a large ship, and is characterized by cutting the hull to shorten the length thereof as it is floating on the sea, and more particularly characterized by, on the cutting of the hull, inserting a buoyancy body under the stem portion or the stern portion to trim the hull and floating up said portion and locating there a marine workshop, drawing the hull into the marine workshop while performing breaking up the hull. According to the present invention, it is possible to break up a hull without special harbor facilities and even at locations such as the lee of island and other position where there is no harbor facilities. Also, since the hull is drawn in the marine workshop and broken up to shorten the length of the hull, the working is greatly simplified compared with a prior method wherein the hull is broken up to shorten the height thereof, and as a result the working period can be shortened.

Abstract: The present invention is characterized by cutting and breaking up a hull of large ship in the floating situation on the sea so as to shorten the length of the hull, transporting the broken up objects to a product making workshop, and subdividing said objects further thereby breaking up into products. Said product making workshop is constructed so as to supply power etc. required for the breaking up process.A breaking up method according to the present invention does not require harbor facilities such as crane etc. so that it does not have any limitation with respect to the breaking up place and since it allows the product making operation from the broken up objects to be performed on the sea, the breaking-up process can be simplified.