Abstract: A railway level crossing (grade crossing) is described in which the road surface between the rails is, at least adjacent the rails, provided by flexible plates, e.g. rubber plates. The plates extend right to the rails and under their edge portions adjacent the rails are resilient support means which allow the plate to flex downwardly when engaged by the flange of a wheel passing on the rail. The resilient support may be a gas-filled tube extending parallel to the rail.

Abstract: A device for controlling both the displacement of, and the transmittal of force by, a longitudinally movable driving apparatus comprising a piston rod which is hydraulically movable inside a cylinder, an emitter and receiver for ultrasonic waves, which are transmitted between a movable and a fixed part of the driving apparatus, a logic circuit and a controllable source of force, said receiver being electronically connected to said controllable source of force via said logic circuit.

Abstract: A regenerative base ion exchange process involving the step of passing a liquid upwardly through a bed of particulate solid base ion exchange resin in a chamber of a two-phase reactor to regenerate said resin, wherein the rate of liquid flow is such that the solid resin is compacted and held by the liquid as a compact bed against a barrier located above it and is prevented by the liquid from sinking.

Abstract: A diesel-engined rail shunting locomotive is provided which combines a very high level of noise insulation with excellent accessibility to the engine and associated apparatus. The locomotive is adapted for remote control by radio, and also has at least one cab for the operator. The engine and associated apparatus are covered by a noise insulating rectangular box-shaped hood which is liftable as a single unit by means of power-operated lifting means provided on the locomotive. The lifting means may be screw jacks located in the four corners of the hood. The cab has an end wall slightly spaced from adjacent the end wall of the hood, to simplify construction and improve sound insulation.

Abstract: Apparatus for cleaning a coke oven door, which has upper and lower closing surfaces and two side closing surfaces which are to be cleaned, the cleaning apparatus being relatively positionable in a position for cleaning when the door is open, comprising a mobile frame having positioning surfaces engageable with guide surfaces at the said upper, lower and two side surfaces of the door in order to locate the door and apparatus in the cleaning position, the frame including horizontally extending upper and lower guide elements and at least one vertically extending guide element, carriages movable along the guide elements, fluid jets carried by said carriages directed (in the cleaning position) at the closing surfaces, at least one jet on the carriage which moves along the vertically extending guide element being connected by at least one resilient element to that carriage and there being at least one follower member connected to the jet which in use engages and is pressed by the resilient element against a guide s

Abstract: Slag shield for a steel converter, comprising a ring of conically set segments around the upper end of the converter. The conically set segments are each provided with two hook-carrying brackets. The hooks near the lower end of the slag shield catching around horizontal bars which are connected around and to the converter. Each segment is held with its upper edge close against the converter vessel by fastening means, which are locally provided on the vessel wall. The fastening means allow for small displacements of the segment in its own plane.

Abstract: A method of repairing refractory walls, especially coke-oven walls is disclosed. The invention utilizes a refractory repair material selected in accordance with the wall to be repaired and not less than 5.5 nor more than 20% binder. The repair material is sprayed onto a hot wall to be repaired and the binder adheres thereto by sintering with at least the boundary surfaces of the binder undergoing vitrification.

Abstract: Shaft furnace having a shell, a refractory lining along at least part of its inner surface of a material which contains at least 50% free carbon, and which furthermore is provided with a water-cooled tuyere which is in contact with the refractory lining, including at least one extra layer of a material provided below the cooled tuyere in the refractory lining, over at least part of its thickness and substantially transversely to the direction towards the cooled tuyere which at the temperature of this layer during operation cannot locally react chemically with water and/or with the reaction products of water and carbon and a closed circular gutter which is connected to one or more de-watering openings through the shell, at least one of the extra layers at the side of the furnace shell being connected to said gutter.

Abstract: A machine part, in which a limited swingable motion can be carried out along a slide surface between a first element and a second element, means being provided for conducting a liquid from a point of the first element which is distant from the slide surface to a side of the second element which faces away from the slide surface, said means having channels or bore holes through both elements with a connecting passage on the slide surface between them, the bore hole in at least one of the two elements being widened at the connecting passage to form an elongated chamber in which there is arranged a flow-through body provided in axial direction with bore holes and axially under pressure, semi-spherical head ends of said flow-through body resting in sealing manner against two ends of the chamber.

Abstract: A device for exchanging the down spout and repairing a seating brick in a steel ladle, comprising a vertically movable cage, a hoist system therefore and a carriage for transferring the ladle along a fixed track. The carriage is adapted to hold the ladle with the radial direction of the bottom of the ladle towards the down spout at an acute angle to the direction of transfer. Above the path of the upper rim of the ladle, a platform is provided, and further a tower construction is displaceable on the platform in the radial direction towards the down spout. The cage is hoistable inside the tower construction by means of hoisting means connected to the tower construction. In a preferred embodiment the cage consists of a substantially cylindrical insulated wall and of a bottom cooled by flushing with air. A ventilation system, a travelling crab, an operating hatch in the cage wall and a special recessed shape of the cage may facilitate operation.

Abstract: A conduit, specifically a hot-blast main for a blast furnace, is supported on a vessel specifically a hot-blast stove, into which it is connected by a branch, by means of at least one vertical support member and a framework mounted on the vessel and carrying the support member. The framework includes a strut or tie element extending from the end of the support member to the point of connection of the conduit branch into the furnace. The support member, which may be a rod hinged to the framework, may suspend the conduit from above or support it from below. This construction is simple and provides support for the conduit without problems due to vertical movement caused by thermal expansion of the point of connection into the vessel.

Abstract: A rail-borne shunting locomotive, to be operated through radio control by a driver as he moves around the locomotive, has a central power plant compartment, a cabin at each end adjacent the power plant compartment, gangways on each side extending alongside the power plant compartment from one cabin to the other, an open platform at each end in front of the cabin and at each side of the platform, at least one step for the driver to stand on at a lower level than the platform. Each cabin is directly accessible from both gangways and from the respective platform. A wide range of operating locations is available to the driver and access to them is convenient.

Abstract: This invention relates to a method for granulating blast furnace slag, in which, by means of watersprays, slag which is supplied through a slag chute into an open explosion room, is first granulated, whereupon the water-granules mixture is transported to an open granulation pit and onto a dewatering bed, the dewatering granules being conveyed from said pit periodically.

Abstract: A method and apparatus for the production of coke from coal by a dry distillation operation wherein the coking plant is provided with a computer unit that receives signals from the coal leveling mechanism, the door mechanism, the quenching car mechanism, and a signal value for the time required to achieve the coking of the coal. The computer prevents the opening of any given coking chamber until the minimum coking time has lapsed and the opening of the chamber and discharging and quenching of the coke is correlated to the actual operating conditions rushing at that time. If desired, the charging and emptying operations may be carried out on a completely automatic basis.

Abstract: In a shaft furnace which has a wall comprising of a shell and stave-coolers inside the shell, and a refractory lining of the wall supported by projections (supporting cams) on the stave-coolers, there are provided special bricks, preferably of material of superior refractoriness, strength, chemical resistance and wear-resistance, which rest on the projections and extend beyond the projections both towards and away from the shell. The bricks are fixed in the furnace wall, for instance by means of a ramming mass, and are preferably received in recessed in the stave-coolers.

Abstract: A new Si-semi-killed BOF steel, especially suitable for use in the form of bar for concrete reinforcements in which the bar is stitch-welded, contains not less than 0.18% and not more than 0.29% C, not less than 1.20% and not more than 1.50% Mn, less than 0.1% Si, less than 0.01% Al, less than 0.005% N, less than 0.05% P, less than 0.05% S, in total less than 0.15% Cr, Ni, Mo, Cu and Sn, and at least some but less than 0.04% Nb, and possibly also at least some but less than 0.06% V. Cold twisting may further improve the properties of the steel.

Abstract: A method for preventing the formation of boiler scale from after treating gases produced in steel-making by adding to the wash water through which the gases pass a solution containing from 0.5 to 2% by weight HCl and from 100 to 150 grams Fe.sup.+.sup.+ ions per liter. The rate of addition of the solution being such that H.sup.+ and Fe.sup.+.sup.+ ions are supplied to the water in constant amounts per unit time.

Abstract: A method of operating a battery of coke ovens with which is associated regenerators with checkerwork which includes measuring the temperature in the upper part of the checkerwork in the regenerators and supplying fuel to the burners in the heating chambers in dependence upon the temperature measured.

Abstract: A shaft furnace having a refractory-lined wall at least part of which is provided with liquid-cooled cooling plates which extend into the lining and are grouped in a plurality of horizontal planes. The cooling plates in each plane are in heattransfer contact with an associated ring extending around the furnace which consists of refractory material of a first kind having a heat conductivity coefficient (.lambda.) at 20.degree.C. of at least 25 kilocalories/hour.meter..degree.C. The interior face of the lining also is provided at least partly by refractory material of a second kind which has high resistance to wear and chemical attack and has a minimum reaction temperature (Tu) of at least 600.degree.C. and a heat conductivity coefficient (.lambda.) at 20.degree.C. of at least 8 kilocalories/hour.meter..degree.C.