Abstract: A method of and inductor for inductively heating a nose or projection and its transition areas, which nose or projection serves as raceway surfaces and extends around an anti-friction bearing ring and has a rectangular cross section. The inductive heat supply is effected uniformly and simultaneously on all raceway surfaces to be hardened with an increase in the induction field in the transition area by varying the coupling distance and by employment of concentrators known per se.

Abstract: The specification describes a procedure for the washing of clothes in a washing machine with a horizontal, perforated, driven tub arranged inside a housing, in which during the washing and rinsing cycles the clothes are repeatedly lifted up, and then fall in a trajectory onto the lower portion of the tub, and are then distributed and pressed against the tub wall, largely without unbalance, as the tub velocity is gradually increased, and are then centrifuged as the velocity is increased further.

Abstract: A cooling element for use in metallurgical furnaces, such as blast furnaces, and a method of making the same. The cooling element is composed of a cast-steel body having a surface which in use faces the interior of the respective furnace and which is provided with elements of refractory material. Embedded in the cast-steel body are steel tubes through which cooling medium is to be circulated when the element is in use. Embedded between the respective tubes are heat-absorbing members which are preferably of the same or an analogous material as the cast-steel body itself and which have the purpose of absorbing the temperature differential between the liquidous point of the steel melt and the superheated temperature at which the melt is cast.

Abstract: An apparatus for stamping indicia on workpieces moving in a path, in a combination which comprises a rail extending along but spaced from the path of workpieces movement, and a stamping unit which is movable along this rail to and from a rest position adjacent an end portion of the rail, and which includes a housing having a lower part which is movable transversely to the workpiece movement path. Cam and follower means are provided for biasing the lower part against a workpiece moving in the path, and an inking box adjacent the end portion of the rail is so positioned so as to be in tight engagement with the housing of the stamping unit when the unit is in its rest position, so as to be protected against ink evaporation and entry of contaminants.

Abstract: A method for applying identification markings on surfaces of moving panels and strips, preferably steel sheets and steel strips. The method is particularly applicable at high speeds, in which the surface of the moving panel or strip between an inspection station and an identification or marking station, is divided into zones of a length equivalent to the marking to be applied. Every individual zone between inspection station and identification or marking station is traced electronically, and the surface of each traced zone is oxidized and melted by a laser light source. Each zone is assigned a location in a shift register associated to an inspection station, and each inspection station is assigned several inspection tasks. A shift register is used for each inspection task. Information items originating from various inspection tasks are recorded in individual shift registers at locations assigned to an individual zone.

Abstract: An arrangement for automatically tracking systems to the center of weld gaps, weld joints or weld reinforcements, in which one or more electrically scanning probes receive signals reflected by a workpiece surface as long as this surface is substantially parallel to the acting surface of the probe. The signals breakdown spontaneously when the surface clearly deviates from the parallel as in the case with the flanks of gaps, joints or reinforcements. The breakdown of the signal is applied for storing an electrical value corresponding to the instantaneous probe position, the probe position for the left flank when traveling from left to right and for the right flank when traveling from right to left. The center of the gap, of the joint or of the reinforcement is computed from the stored electronic position values in a series-connected electronic device, by means of a computer circuit.

Abstract: An arrangement for covering the guide channel of a strap-applying and tying apparatus. On one side, the apparatus has a bent or curved portion extending into and away from said guide channel for varying the length of the guide channel in conformity with an item about which a strap or band is to be placed. The apparatus also includes channel covers or cover plates arranged on the one side and urged to cover the guided channel by means of springs. The cover plates and the springs therefor are mounted on a flexible member, which, together with the bent portion, is displaceably arranged relative to the guide channel; in this connection, the flexible member is held along a boundary side of the guide channel in a guide. The flexible member is passed at least in part around a wheel or roll for changing its direction of travel.

Abstract: A hot rolling mill and a method of operation to reduce scrap upon failure of a portion of the mill in which a first furnace device is provided adapted to receive and reel up a strip which is ready to go to the finishing section of the mill and a second furnace device is provided to receive a strip of material being rolled in the roughing section of the mill without reeling up, while both furnace devices maintain the material therein at working temperature and in continuous motion.

Abstract: A method of and device for producing multi-layer pipes by helically winding a plurality of bands loosely arranged one above the other, which are individually withdrawn from a supply, straightened out, trimmed, and in the form of a band loop are conveyed to the forming station at the respective angle of lead-in corresponding to the respective pipe diameter, whereupon the layers are together welded to form a pipe strand which is subsequently cut into individual pipes. All bands are supplied and advanced independently of the irregularities of the respective longitudinal band edge shape in steadily straight lead-in directions, and all band edges are machined together to a possible maximum width in coordination with each other whereupon the bands are driven together while the welding gap is controlled in conformity with their band edge shape merely by pivoting the pipe.

Abstract: A method of controlling a heating furnace for steel ingots, particularly a soaking pit for steel ingots, which is charged with a basic fuel quantity for heating the ingots to rolling temperature. The surface temperature of the ingots and thermal data of the furnace are measured and heat balances are established. From the resulting furnace balance temperatures, together with the surface temperature of the ingots, an estimated value for the center temperature of the ingots is determined in an estimating device. The estimated ingot center temperature and the ingot surface temperature as actual temperatures are compared with predetermined ingot core and surface temperatures as nominal temperatures. The resulting difference is used to correct the basic fuel quantity fed to the furnace. The surface temperature of each individual ingot in a furnace may be measured.

Abstract: A method of depositing an oil containing protective surface layer on a very thin metal sheet preferably intended for packing purposes. The very thin metal sheet, in the form of a band and at a band speed of up to 600 m/min, is electrostatically coated with a mixture comprising 1 to 2 parts of an ester of sebacic acid, azelaic acid, or citric acid, and 1 part of a high molecular monobasic acid having the general formula CH.sub.3 (CH.sub.2).sub.n CON(CH.sub.3)CH.sub.2 COOH. The coating is formed in a layer of 1 to 10 mg/m.sup.2 of surface of the metal sheet.

Abstract: An arrangement for opening and cutting up packaging straps for scrap, in which a traveling frame moves transversely to a transport track. A cross beam with adjustable elevation has fastened to it a device for snipping and cutting up straps for scrap. A sensor determines the position of the package, of the packaging strap, of shears and shear blades. A control unit with preset control program switches the drives of the transport track, of the traveling frame, of the cross beam and of the device for snipping and cutting up for scrap, which is connected to the sensor. The shears have an extension forward of the lower shear blade with a blade-shaped pointed wedge, and drives for producing a nearly continuous force and for producing impacts attached to the shears. The wedge-shaped extension may form an acute angle with the package surface; this angle is adjustable relative to the package surface via a fulcrum.

Abstract: A resilient rail connection is adjustable laterally and as to height, especially for bridge and tunnel sections. An exchangeable intermediate plate and tie screws hold down the foot portion of the rail and are adapted to be screwed into a roadbed. The supporting plate supports the rail and is provided with laterally upwardly extending flanges. An elastic layer cast underneath the supporting plate rests in a recess of the roadbed. Supporting screws which extend through the flanges laterally support holding blocks, which have an oblong hole extending in a direction transverse to the rails. The holding blocks are connected to the roadbed by means of tie screws which extend through the oblong hole and the exchangeable intermediate plate as well as through the supporting plate and the elastic layer.

Abstract: A method for preheating the oxygen used in converters. Steam which is already available in the usual steel manufacturing plant, is used to preheat the oxygen. The steam may be generated from waste gas produced in an converter process. A heat exchanger which may be placed into an oxygen supply line, feeds into a line of the blast lance. This heat exchanger may be placed between the feed line to the blast lance and shut off and control devices in the oxygen supply line. A connector in the oxygen supply line may be located between the heat exchanger and the feed line to the blast lance, and may be heat-insulated.

Abstract: An inclined rolling stand for reducing a starting material to a pipe or rod, which includes a roll carrier adapted to be driven and to permit a central passage of the material to be rolled. The roll carrier includes three conical substantially identical and axially adjustable working rolls which are adapted to be driven and are inclined relative to the rolling axis at the same acute angle. The three working rolls are offset relative to each other around the rolling axis by 120.degree. and are so directed with regard to the rolling axis that their extended axes respectively cross the rolling axis at the same short distances while the narrow ends of the conical working rolls respectively include a smoothing zone representing a surface of rotation about the axis of the respective working roll.

Abstract: A method of producing steel with the lowest possible desired sulfur content by desulfurization of pig iron with magnesium coke. The magnesium coke is introduced into the pig iron smelt which is to be desulfurized. An inert gas such as nitrogen is then introduced into the smelt to agitate same until the magnesium is completely reacted. The thus treated smelt is subjected to subsequent inert gas rinsing in order to separate magnesium sulfide from the smelt and convey to into the slag formed on the smelt. A slag-free area is then produced on the surface of the smelt by introducing inert rinsing gas on the surface. Slag powder is introduced upon the exposed surface of the smelt to form a cohesive, viscous slag, which is then withdrawn. Scrap iron having suitable high or low sulfur content may be introduced into the desulfurized pig iron to adjust the desired sulfur content thereof.

Abstract: A hot rolling mill and a method of operation to reduce scrap upon failure of a portion of the mill. A first furnace device is provided in the mill adapted to receive and reel up a strip which is ready to go to the finishing section of the mill. A second furnace device is provided to receive a strip of material being rolled in the roughing section of the mill without reeling up. Both furnace devices maintain the material therein at working temperature and in continuous motion.

Abstract: A measuring device for checking the dimensional accuracy of the track width of curved transport tracks formed by paired rollers lying on a radius of curvature equidistantly be placed into a transport track and moved therealong, is provided with at least two displacement sensors. The sensors are spaced apart at a distance determined by the track width. The carrier for the displacement centers has contours corresponding substantially to the curvature of the transport track. The carrier has a length which ensures, when inserted in the transport track, the continuous spanning of at least two successive roller pairs. The displacement sensors are located on a radius of the circle of curvature of the track. The height of the carrier corresponds substantially to the track width, and the sensors are of the non-contact type. The carrier may be coated with elastically resilient material on those surface portions subjected to reciprocal action with the rollers.

Abstract: A one-piece intermediate member for separating from each other anti-friction bodies of an anti-friction bearing. This intermediate member has a mantle surface adapted to the race cross section of the respective anti-friction bearing for which the intermediate member is intended. The intermediate member is by a dividing wall or partition extending substantially perpendicular to the axis of the intermediate member divided into two sections forming an image to each other. Each side of the dividing wall, which latter may e.g. be of synthetic material such as plastics, is provided with a reinforcement, e.g. in the form of a ring or a polygon, and this reinforcement is connected by webs to the mantle and has ribs extending from the reinforcement in the direction toward the axis of the intermediate member with the inner ends of the ribs being spaced from each other.

Abstract: A stamping device especially for heavy products such as rolled goods which, when being transported, are stamped on a roller train equipped with a guiding device. The guiding device comprises a feeler device and an aligning device connected to the feeler device, a stamping head being connected to the aligning device.