Abstract: A shaft sealing device for a turbocharger wherein seal rings are disposed between a shaft and a bearing casing and in order to lower the high pressure gas which passes through the seal ring to a low pressure, a small chamber in communication with the exterior is formed, whereby the gas leakage into the bearing casing may be reduced as much as possible.

Abstract: Disclosed is an apparatus for multi-strand continuous casting wherein a plurality of strands may be spaced apart from each other by a distance only dependent upon the dimensions of a copper plate and water-cooling jacket of a mold because a multi-strand mold oscillation mechanism may be installed independently of the spacing between the adjacent strands and the amplitude of oscillation of each mold may be suitably adjusted depending upon the casting conditions but independently of each other. Cast products emerging from the molds are withdrawn through a multi-strand roll apron or bending unit, a multi-strand casting bow, a multi-strand straightener and a multi-strand table by a multi-strand-pinch-roll stand consisting of a plurality of coaxial multi-pinch-roller assemblies, the individual pinch rollers in each assembly being driven independently of each other.

Abstract: An installation for the production of continuously cold rolled sheets or strips wherein the continuous operation is effected when a coil of the cold rolled sheet metal or strip is directly and effectively produced from a coil of the hot rolled sheet metal or strip.

Abstract: An apparatus for an electric furnace capable of effecting electrode connection and refractory lining repairs independently of each other. Mounted on a common supporting member are an electrode connecting device for suspending a new electrode and a refractory lining repairing device having a revolvable nozzle for blowing the refractory lining patching mixture against the eroded cavities in the lining in such a way that they may be traversed along the supporting member independently of each other. The new electrode suspended by the electrode connecting device is rotated whle being lowered so as to be screwed into the consumed electrode. The eroded refractory lining is repaired with the refractory lining repairing device.

Abstract: Disclosed is a device for detecting the displacement of a hydraulic cylinder barrel and its piston with a higher degree of accuracy even when a hydraulic cylinder is subjected to severe vibrations.

Abstract: Both an upper blade carried by an upper drum and a lower blade carried by a lower drum or either of them is so arranged as to describe a non-circular locus when shearing is effected.

Abstract: Apparatus for the continuous granulation of molten slags produced in metallurgical furnaces such as blast furnaces, converters, electric furnaces, reverberatory furnaces and the like, and for recovering the heat of the molten slags, includes a vertically oriented conical bounce deflector 4 against whose non-wettable surface a plurality of circumferentially arranged molten slag jets 1 are directed.

Abstract: In a warehouse having a plurality of framed storage rack structures arranged parallel along a first coordinate axis to define parallel lanes, each of the structures includes a plurality of columns horizontally spaced along a second coordinate axis and a plurality of racks vertically spaced along a third coordinate axis so that a plurality of storage locations are defined and addressable in terms of the positions on the first, second and third coordinate axes. A first plurality of fire sensors are provided in the storage rack structures to indicate the position of a fire in terms of the first and second coordinate axes. A remote-controlled load-handling structure is provided for each lane for carrying an article to a selected storage location in response to a command signal delivered from a central console through a communication link. A second plurality of fire sensors are mounted on the load-handling structure in positions corresponding to the vertically spaced storage locations.

Abstract: A continuous rolling mill capable of rolling a sheet metal under a reduced rolling force without wrapping it around work rolls wherein, at each of rolling stands, the upper and lower work rolls are rotated at different peripheral speeds in such a way that the peripheral speed of one of said pair of rolls which is rotated faster than the other may be substantially equal to the velocity of the metal sheet leaving said pair of rolls while the peripheral speed of said other roll which is rotated slower than said one roll may be substantially equal to the velocity of the metal sheet entering the pair of rolls.

Abstract: A slinger arrangement whereby the lubricating oil supplied to a bearing of a turbine shaft may be prevented from being sucked through one or more seal rings into a blower when the pressure in the blower becomes negative.According to one embodiment of the present invention, the slinger consists of a large- and small-diameter sections, and a first seal ring is fitted into a circumferential groove formed in the large diameter section and contacts the lower end of first and second air vent chamber casings which is remote from a fan wheel, the first and second casings being axially spaced apart from each other and cooperating to define an air vent chamber, while a second seal ring is fitted into a circumferential groove formed in the small-diameter section and contacts the lower end of the other air vent chamber casing which is closer to the fan wheel. A circumferential oil throwing groove may be formed in the large-diameter section between the first and second seal rings.

Abstract: A vacuum carburizing furnace wherein the concentration of carburizing gas in the furnace atmosphere as well as the furnace pressure may be maintained within predetermined ranges for optimum carburization, and the carburizing atmosphere is forced to circulate by a fan within the heating chamber so that parts or articles may be uniformly carburized.

Abstract: Shield tunneling machine and method which may minimize the variation in water- and earth-pressure at the tunneling face so as to hold the ground firm and to ensure the safe tunneling.

Abstract: Disclosed is a hydraulic servomechanism including a control loop consisting of an input device, an adder-amplifier, a servovalve, a cylinder or actuator and a load operatively connected in the order named for controlling the position of the load, a position feedback loop and an acceleration feedback loop. In one embodiment of the invention, the hydraulic servomechanism further includes a feedback loop wherein an output from an accelerometer or pressure sensor for detecting a differential pressure across a piston in the cylinder and an error signal from the adder-amplifier are arithmetically processed and fed back to the adder-amplifier.

Abstract: Metal rolling process and mill wherein the ratio in peripheral velocity between a pair of upper and lower work rolls is so controlled that a metal may be rolled to a desired shape or to close thickness tolerances.

Abstract: Disclosed is a process and apparatus for multi-strand continuous casting wherein a plurality of strands may be spaced apart from each other by a distance only dependent upon the dimensions of a copper plate and water-cooling jacket of a mold because a multi-strand mold oscillation mechanism may be installed independently of the spacing between the adjacent strands and the amplitude of oscillation of each mold may be suitably adjusted depending upon the casting conditions but independently of each other. Cast products emerging from the molds are withdrawn through a multi-strand roll apron or bending unit, a multi-strand casting bow, a multi-strand straightener and a multi-strand table by a multi-strand-pinch-roll stand consisting of a plurality of coaxial multi-pinch-roller assemblies, the individual pinch rollers in each assembly being driven independently of each other.

Abstract: A blow molding method and machine and more particularly a method and machine for extruding a multi-layer parison for blow molding, wherein at least two layers of molding plastics, each plastic compensating the poor or undesirable physical and chemical properties of the other plastic and/or each having a different color are forced to flow through different passages having an annular cross sectional configuration, and are joined at the junction of a short passage to be extruded into a multi-layer parison.

Abstract: An electric smelting furnace in which a hollow electrode with the wall thickness depending upon the depth of current penetration is disposed vertically within the furnace and spaced by a desirable distance from the furnace bottom, and the top of the hollow electrode is connected to a duct for discharging the furnace off-gases and charging the raw materials into the furnace after they are preheated by the furnace off-bases in the duct and prereduced in the hollow electrode.

Abstract: A rolling mill wherein a pair of upper and lower work rolls are rotated at different peripheral velocities with the peripheral velocity ratio being substantially equal to an elongation ratio at which a sheet metal is rolled, and the tensions exerted to the sheet metal entering and leaving the pair of work rolls are controlled in such a way that the velocity of the sheet metal entering the work rolls may be maintained equal to the peripheral velocity of one of the pair of work rolls which is rotated slower than the other while the velocity of said sheet metal leaving the work rolls may be maintained equal to the peripheral velocity of said the other work roll. Rolling may be accomplished without the need of wrapping the sheet metal around the work rolls, and the rolling pressure may be reduced to a degree comparable RD process.

Abstract: A rolling mill capable of rolling a sheet metal into a final product under a low rolling pressure without the need of wrapping the sheet metal around a pair of work rolls. The pair of work rolls are rotated at different peripheral velocities, and the tensions exerted to the sheet metal entering and leaving the pair of work rolls as well as the degree of reduction are so controlled that the ratio of the peripheral velocity of one of the pair of work rolls which is rotated faster than the other work roll to the peripheral velocity of the other work roll may be substantially maintained equal to the elongation ratio of the thickness of the metal sheet entering the pair of work rolls to the thickness of the metal sheet leaving the work rolls.

Abstract: Disclosed is a shearing device wherein a shear main body including an upper and a lower blades one of which is moved toward or away from the other for shearing an ingot is provided with eccentric means so that when the shear main body swings in synchronism with an ingot to be cut which is continuously moving, the upper and lower blades may be moved substantialy horizontally in the direction of the passage of the ingot especially when the shearing of the ingot occurs, thereby preventing the "nose bending" of the ingot.