Abstract: The invention relates to a device for fitting and fixing gripping shoes on vehicle wheels. Four gripping shoes are fitted at the one end of respective arms which, after being fitted on the wheel, form a cross. The other ends of the arms of the gripping shoes are toothed and the arms are slidingly suspended in their longitudinal directions relative to a housing centrally situated with respect to the wheel and are movable by means of a gear wheel, rotatably mounted in the housing. The gear wheel engages with the teeth on the arms and is rotatable by means of an operating mechanism. The centrally situated housing is shaped from one piece in which there are arranged four channels for slidingly suspending and guiding the arms of the gripping shoes. The channels are running from the lower part and in the same plane on each of the short sides of the centrally situated housing and are running out at the upper part and in the same plane on opposite short sides of the centrally situated housing.

Abstract: Electrode holder system for electrothermic smelting furnaces comprising current clamps for conducting electric current to an electrode and hydraulic cylinders for moving the electrode up and down. The cylinders are connected to the electrode via an electrode frame and releasable clamping means. At least two vertical rails are arranged parallel to the electrode. The rails are at their upper ends suspended from a suspension frame and have a stopper means on their lower ends. The stopper means represents the lower limit for the movement of the current clamps. The electrode holder system combines regulation of the tip position with automatic feeding of the electrode.

Abstract: A method and an apparatus for treating a gravel type solid material with a liquid in a bath are described. The apparatus comprises means for supplying the solid material, means for transporting it through the bath and means for removing the processed solid material from the bath. The apparatus comprises further means for supply of liquid and tapping off of the liquor. The method comprises introduction of the gravel type solid material into the bath at its lower end and removal of the processed solid material at the upper end, the gravel type solid material being gradually transported upwards through the bath by means of rotating lifting members while liquid is introduced into the bath at its upper half while liquor is drained off at the lower half. The lifting member comprises at least one inclined plate which is rigidly fixed to a vertical tube through which the solid material is introduced into the bath or the tank.

Abstract: Pure silicon metal is produced from a silicon metal which contains 1-10% Ca and which is cast into molds with relatively slow rate of cooling. The cast metal is pre-crushed and thereupon subjected to a purification process consisting of two leaching steps where in the first leaching step there is employed an aqueous solution of FeCl.sub.3 or FeCl.sub.3 +HCl which causes a disintegration of the metal. The fines are washed away in place thereof, and the metal is further leached in the second leaching step with an aqueous HF+HNO.sub.3 solution. The necessary amount of calcium is supplied in the smelting furnace in the form of CaO or other suitable Ca compound.

Abstract: A lubricating system composition for the extrusion of polyvinyl chloride resin conduits is provided by treating silica fume particles at least in part with a lubricant to form a premix additive for polyvinyl chloride extrusion compounds whereby the resulting product has unique and particularly advantageous physical characteristics which makes possible the reduction in wall thickness and an increase in loading of calcium carbonate to effect a material reduction in cost of manufacture.

Abstract: In charging electrothermic smelting furnaces the charge is fed batchwise to the furnace pot through annular charging units arranged more or less concentrically around each electrode. The charge is supplied to each annular charging unit which surrounds each electrode and consists of a rotatable chamber which comprises at least one bottom member and two substantially vertical side walls. The bottom member and the walls are rotated together for supply of charge to the chamber, then the bottom of the chamber is rotated separately from the walls whereby the charge contained between the walls of the chamber is allowed to fall into the furnace pot through at least one closable opening in said bottom member.

Abstract: A process of forming a continuous carbon electrode for use in a smelting furnace in situ is disclosed. The process consists of at least two annular members, the first annular member provides the heat for softening, and baking the electrode paste to form a solid carbon electrode and the second annular member provides the electric current for the furnace. The second annular member receives energy independent of the first annular member. The weight of the electrode is supported either by the first annular member or by a third annular member which is added between the first two annular members.

Abstract: The publication relates to means for cooling a body, comprising at least a tube through which a liquid coolant is flowing in order to remove heat away from the at least one tube and its surroundings. The tube(s) houses an internally arranged hose having a wall thickness, permeability and/or porousity and a quality which corresponds to the heat energy to be removed from the tube(s) and/or it surroundings. The hose has preferably an outer diameter which corresponds substantially to the internal diameter of the tube(s) and the hose is formed of a texture of a flexible material such as for example textile or fiberglass. The hose may be fastened to the tube at its inlet end.

Abstract: The present invention relates to a feed device for guiding rope onto winding drums on hoisting apparatus where the drum is mounted on a frame 6. The device comprises a pendulum 4 which is spherically pivoted at its upper end to the frame 6 above the drum 1 and at its lower end has secured a roller 7 intended to roll on a curved path 8 on a flange 9 mounted on the frame 6. The pendulum has at least one guide pulley 11 for the rope 2.

Abstract: The present invention relates to apparatus for cooling an object which is exposed to high temperatures and particularly to cooling by heat transfer to a liquid. According to the invention an internal hose is disposed in a fluid conduit. The hose is permeable to the coolant liquid which is circulated therein so that there is created a substantially stagnant fluid boundary layer between the walls of the tube and the internal hose for efficient heat transfer to the circulating fluid within the hose.

Abstract: The present invention relates to an assembly and a method for feeding electrodes which are used in electrothermic smelting furnaces. The electrode comprises an electrode casing having vertical ribs projecting radially outwards from the casing. A plurality of electrode feeding units, each including a clamping means are arranged around the periphery of the electrode and each clamping means exerts a releasable pressure on a rib, the clamping means imposing only tangentially forces on to the electrode. When feeding the electrode, the pressure on one of the clamping means is temporary released and the clamping means is moved in vertical direction relative to the electrode, whereafter the pressure on the clamping means is reactivated. This is done for every electrode feeding unit with a preset time-delay between the movements. When all the electrode feeding units have been moved one at a time, all the electrode feeding units are moved together in vertical direction.

Abstract: Cracks and surface flaws in billets are detected by heating the surface of the work-piece by means of high frequency current, the heating taking place while the work-piece is brought to pass in its longitudinal direction through a high frequency induction coil. That part of the work-piece, which has just left the coil is immediately, while the work-piece is still passing through the coil, scanned by means of infrared recording equipment which records the temperature distribution across the work-piece. The emission coefficient for the different work-pieces is increased and differences equalized by moistening the surface of the work-piece with an appropriate liquid, for instance water, to which have been added components for reduction of the surface tension.

Abstract: The present invention relates to apparatus for cutting carcasses, especially hogs. The apparatus comprises a knife to which is imparted an oscillating motion in the vertical direction. This is suitably accomplished by a ramming device arranged at one end of the knife with the knife being pivotably supported by a frame on its opposite end.

Abstract: The present invention relates to a lock system comprising a lock of the type where the combination of the lock is given by a more or less platelike code member which may be removed and substituted and where the lock is operated by means of a more or less platelike key member. The key member is equipped with a code adapted to the code of the code member. The lock comprises a housing and means intended to be activated by the code of the code member and/or the code of the key member, said means reading the codes. Parts of the code on the key member may be read mechanically, using blocking pins while parts of the code may be read optically and/or electronically by means of light diodes emitting infrared light.

Abstract: The present invention relates to a reduction furnace with a split furnace body, particularly suited for production of ferro alloys, pig iron or calcium carbide. Furnaces of such types are provided with a furnace pot equipped with an internal refractory lining anchored to the furnace wall by means of anchoring elements. According to the present invention the refractory lining of at least the upper section of the split furnace body comprises a plurality of individual, pre-fabricated elements which are removably arranged at least on the upper section. Each unit comprises preferably a rear plate of steel, pig iron or similar material and one or more anchoring ribs or bolts extending horizontally out from and rigidly secured to the rear plate. The anchoring ribs provide a hold for the refractory lining on the rear plate. The separate units are suspended at least from the upper segment by means of simple support means.

Abstract: An improved holder assembly for self-baking electrodes in an electrothermal smelting furnace comprises a plurality of contact clamps which are pressed towards the electrode by hydraulic presses between the clamps and a cylindrical body arranged externally around the clamps. The holder assembly is further equipped with means for conducting current, coolant and/or pressure agent to the contact clamps. The contact clamps extend at least up to the zone where the raw, unbaked electrode paste is unaffected by the heat from the smelting furnace. The cylindrical body extends up from the area of the presses. The cylindrical body is slidably arranged with respect to the contact clamps. Each of the contact clamps is separately suspended and may be moved individually with respect to each other and with respect to the surrounding cylindrical body.

Abstract: The invention relates to a method and apparatus for charging an electric smelting or reduction furnace. In accordance with the invention, a charge tube movable within the roof or smoke hood of the furnace and is normally held in a protected position therein. When charging of the furnace is desired, the charge tube is lowered into the furnace to serve as a means for channeling charge material into the furnace. Preferably, the charge tube is operative to accumulate charge material while in its protected position and to release the material as it is lowered toward the furnace pot.

Abstract: The disclosed invention is an apparatus for connecting two current conducting tubes, which also conduct fluids such as for example, a coolant. The connection apparatus conducts current from one tube to the other through a sleeve, the said tubes having a machined external surface against which the sleeve is pressed. A hose receiving hydraulic pressure is disposed between the sleeve and an external casing for providing a removable pressure against the sleeve for clamping the pipes in the sleeve. The present invention may be used in conjunction with a holder assembly for electrodes in an electrothermal smelting furnace.

Abstract: The present invention relates to an electrode holder assembly for self-baking electrodes in an electrothermic smelting furnace. The electrode comprises an electrode casing having vertical fins projecting radially outwards from the casing. A plurality of clamping means are slidably arranged on said fins. The clamping means function both as means for conducting current into the electrode and as means for holding the electrode in position. The clamping means impose only tangentially forces on to the electrode in the baking zone. Protection shields are preferably arranged in lateral direction around the electrode, the shields being arranged between the clamping means or outside. Means for supplying air/gas into the space between the shields and the electrode in order to improve the baking conditions are provided.

Abstract: Selective extraction of zinc from chloride solutions which contain iron, copper and zinc, where the zinc is extracted in organic phase by means of tri-n-butylphosphate in an organic solvent. The extraction is carried out on chloride solutions in which the lead contents is possibly lowered and where the copper contents is maximum 50 grams per liter higher copper concentration being reduced for instance by electrolysis in diaphragm cell. The zinc containing organic phase is washed, and zinc back-extracted and conducted to a diaphragm cell for electrolysis of zinc, the used electrolyte being returned to the back-extraction step. The raffinate from the zinc extraction is used for repeated leaching of metals after preceding reoxidation.