Abstract: Disclosed is a method for welding wear-resisting hard metals directly to iron base members which are slide or wear members of machinery. Hard metals comprising a tungsten carbide and a binder consisting of 15 to 30% by weight of Ni and/or Co is employed as said hard metals. A Ni alloy metal containing no Cr is used as a filler metal.

Abstract: A housing of a turbine of an exhaust gas driven turbocharger has a bypass passage which intercommunicates between an exhaust gas induction passage for directing the exhaust gases from an engine into a turbine wheel chamber and a turbine exhaust passage for discharging the exhaust gases. Disposed in the bypass passage is a valve body which normally closes the bypass passage but opens it so as to cause part of the exhaust gases to bypass the turbine when the pressure of the air delivered from a compressor exceeds a predetermined level.

Abstract: A device for automatically wrapping a strip of metal to be rolled partly around upper and lower working rolls in the form of S or inverted S in a safeguarded and simplified manner.

Abstract: A combustion control system for a rotary kiln with a suspension preheater including a calcining burner wherein slurries of Portland cement raw materials, lime slurries, alumina, magnesia or the like are filtered into a cake, the cake being burned in the kiln with the suspension preheater.

Abstract: In a distillation process, the heats of distillates and bottom product are recovered to preheat the feed and to generate the steam of higher than 5 kg/cm.sup.2 G which in turn may be utilized to improve the distillation efficiency.

Abstract: A gas-liquid separator wherein a helical passageway is defined between an outer cylinder and an inner cylinder in such a way that a working fluid with entrained bubbles may be forced to flow tangentially into the helical passage and swirl therethrough. The entrained bubbles are separated from the liquid through centrifugal force produced by the swirling or vortical flow through the helical passageway and trapped or collected inside the inner cylinder, from which they are discharged to the exterior.

Abstract: A device for blasting descaling slurry jets against the surfaces of sheet metal is disclosed, thereby descaling the same prior to cold rolling.

Abstract: Leakage of a liquid may be detected in terms of the drop in intensity of light rays traveling through a light guide core or optical fiber made of glass or synthetic resins due to the adhesion of the leaked liquid to the light guide.

Abstract: A descaling slurry is applied to a surface of an elongated metal strip from a nozzle array while the strip is moving in the direction of its length. The nozzle array is positioned in spaced relation to the strip surface and extends transversely to the strip at an acute angle so that the individual slurry streams emanating from the nozzles do not intersect and strike the strip in a line at the same acute angle as the nozzle array. The nozzles of the array are directed toward the strip surface at an acute spray angle in the direction of movement of the strip.

Abstract: In an apparatus wherein part of the compressed air from the compressor of a turbocharger is used as control air and is made to act on a diaphragm so as to control an exhaust gas relief valve, thereby controlling the amount of exhaust gas to be charged into the turbine of a turbocharger. The present invention discharges into the exhaust gas the control air which acts on the diaphragm.

Abstract: A mud gun for closing a tap hole of a vertical furnace, especially a blast furnace, is provided with a novel mechanism for traversing the gun barrel and pressing the muzzle of the barrel against the tap hole under high pressure.

Abstract: Disclosed is a denitrification reactor wherein each of catalyst cells is provided by packing a plurality of honeycomb catalyst blocks into a box-shaped frame with four corner posts; a plurality of vertical guide posts are erected in such a spaced apart relationship that four adjacent vertical guide posts may vertically guide the corner posts of each catalyst cell; and the catalyst cells with honeycomb catalyst blocks are charged along said vertical guide posts and are pressed thereagainst.

Abstract: An arc furnace for quickly and continuously melting directly reduced iron ore so as to make steel, wherein the furnace wall above the hearth line and the furnace roof have partly spherical inner surfaces, the spherical surface defining these inner surfaces having the center located adjacent to the point equidistantly spaced apart from the lower ends of electrodes, and the electrodes are inclined at an angle to the vertical so that the distance between the lower ends thereof may be reduced to a minimum.

Abstract: According to one embodiment of the present invention, the oxygen gas is introduced into a horizontal, unitary and totally-closed furnace shell, and nuclear fuel to be reprocessed is charged onto an oxidation and separation plate which is horizontally disposed for vibration within the furnace shell along the axis, so that the nuclear fuel may be reprocessed by oxidation in the oxygen atmosphere while the fuel is vibrated and transported on the oxidation and separation plate and the reprocessed nuclear fuel in the form of particles may be discharged. At the same time released volatile fission products from the pulverized fuel are isolated by means of a vacuum blower. According to another embodiment of the present invention, a reduction furnace which is substantially similar in construction to the oxidation furnace described above except that a reducing gas is supplied by an independent source.

Abstract: Disclosed is a hydraulic motor with a nutating member. The nutating member mounted for nutation on a spherical surface bearing which in turn is mounted on a casing, has first and second bevel gears on respective end faces thereof, the first bevel gear on one end face being in mesh with a bevel gear rigidly mounted on the casing while the second bevel gear on the other end face being in mesh with a bevel gear carried rigidly by a shaft. A swash plate mounted on the casing for coaxial rotation with the shaft has an inclined end face against which said one end face of the nutating member is made to contact and being pressed thereagainst under the forces of pistons so that the swash plate with the inclined end face is caused to rotate, whereby the nutating member is made to nutate. Such nutation of the nutating member due to extension and retraction of the pistons under hydraulic pressure in a predetermined sequence results in the rotation of the shaft or the casing with respect to each other.

Abstract: In a reactor, fine iron ore solids are made to descend through the fluidized bed of fine carbon bearing particles sustained within the reactor so that the fine iron ore solids may be reduced and simultaneously the reducing gas may be produced. The direct reduction efficiency may be considerably improved.

Abstract: A device is disclosed for inserting a lance into a vertical furnace, especially a blast furnace, so as to sample gases and measure the temperatures or pressures thereof, thereby obtaining the accurate information of operating conditions in the furnace.

Abstract: A variable-capacity radial turbine is provided with a gas flow rate control plate which may throttle a restriction of a scroll-shaped channel of a turbine casing, through which flows the exhaust gases into a turbine impeller, so that the impeller may rotate substantially at a constant speed and consequently the intake pressure may be maintained constant over a predetermined engine speed range.

Abstract: A shaft sealing device for turbocharger wherein the outer peripheral surface of a piston or shaft sealing ring and its mating surface of the shaft bore of a bearing casing are axially tapered or diverted at the same positive angle toward the high pressure side, whereby wear of the ring may be avoided and the leakage of gases from the turbine into the bearing casing and the leakage of oil from the bearing casing to the turbine may be prevented.

Abstract: Process and apparatus for calcining finely divided cement raw materials including finely divided combustible materials in a suspension preheater with a calcining furnace. Finely divided calcareous materials are directly charged into the suspension preheater while finely divided argillaceous materials, including combustibles such as oil shale, are charged into a bypass duct for bypassing part of the high temperature gases in the suspension preheater to a calcining zone or calcining furnace. The raw materials charged into the bypass duct are subjected to thermal decomposition, resulting in solids and combustible gases. The combustible gases are separated from the solids and are charged into the calcining zone or calcining furnace while the separated solids are charged into the suspension preheater, mixed with the finely divided calcareous materials, preheated and calcined.