Abstract: The invention provides a method and a set-up for production of castings containing cast-in steel tubes, preferably to provide cooling elements for metallurgical furnaces. The castings are from cast steel and the steel tubes are cast-in with a superheated cast steel melt. Before the casting the tubes are filled with a granular, highly thermal conductive, refractory material. In order to assure that the cast-in steel or respectively cooling tubes remain free from leaks, the invention provides to employ as a filling material one or more of the materials: burned magnesite (sintered magnesite), corundum, sintered aluminum oxide, chromite, silicon carbide, silicon nitride.

Abstract: Improved steel profiles having superior material characteristics are obtained by rolling a precipitation-hardenable fine grain steel, cooling it from a final rolling temperature above the A.sub.1 -temperature down to a temperature of about 400.degree. C. in an atmosphere in which it is allowed to overage, whereupon the steel plate or strip is then cooled down to room temperature and cold-processed to form an open profile which can thereupon be converted into a tube by welding together its longitudinally extending edges and which is then subjected to solution-annealing in order-to dissolve coarse precipitants and subsequently further cooled to form finely dispersed precipitants in the profile.

Abstract: It is necessary to determine welding temperature as precisely as possible in order to properly control the high-frequency welding of longitudinal pipes. Changes in welding temperature are proportional to alterations in the welding current that flows through the edges of the skelp. Magnetic-field sensors can be used to directly and precisely determine alterations in the current and hence changes in the temperature. Voltages induced in the sensors can be processed into setting signals to correct the high-frequency welding generator and disruptions in the current used to generate signals to mark the site of failure on the pipe for subsequent rejection.

Abstract: A device for tensioning a strapping band obtained from a supply reel and positioned around a package, and for fastening the overlapping ends of the band together with a sleeveless connection, as well as for cutting off the length of strap not untilized in wrapping the package and leading from the supply reel. A motorized drive mechanism for the upper half of a band-fastening tool and that for the tensioning wheel consists of a single motor that first, while it rotates in one sense, powers a tensioning wheel which tensions the strapping band, and then, subsequent to a shift in gear that depends on the tension in the band, reverses its rotation and powers the shaft of the upper half of the band-fastening tool. The gearshift consists of a pivoting lever that can be shifted against the force of a spring out of its initial position. The pivoting lever engages a spring-loaded gearshift lever through a set screw. The pivot lever is activated by the reaction force of the drive mechanism.

Abstract: A system for non-destructive testing of metallic materials and for, in particular, welding seams. An ultrasonic sensor is employed and ultrasonic defect signals are producted according to the pulse echo method. The ultrasonic defect signals are digitized and the digitized signals are combined with signals corresponding to longitudinal positions along the welding seam. A defect curve is produced form the data resulting from combining the digitized signals with the signals corresponding to longitudinal positions along the welding seam. The resulting defect curve is compared with data from a catalog of classes of defects. The system eliminates the need for manual ultrasonic reinspection of presumed welding defects.

Abstract: Apparatus for tensioning a plastic strapping band positioned around a package and for connecting the overlapping ends of the band by hot bonding consisting of a fastening mechanism for hot bonding the overlapping ends of the band and including a backing plate, between the band and the package, against which three plungers aligned along the longitudinal axis of the band can be applied, the first plunger securing the free front end of the band, the second plunger securing the rear end of the band, and the third, middle, plunger forcing the overlapping ends of the band against a hot-bonding mechanism in the form of a heated cutter and compressing the molten ends together. The three plungers (27, 28, 29) aligned along the longitudinal axis of the band (20) are activated with a single cammed disk (31) on a shaft (67) perpendicular to the longitudinal axis of the band.

Abstract: Support and tensioning apparatus for a strapping band to be tensioned around a package. A band first pressed between a pair of wheels and advanced in a band guide that surrounds but does not contact the package. The band is subsequently retracted with its front end secured in place into a position against the package by reversing the sense in which the pair of wheels rotates, and is then tensioned with a separate tensioning wheel that rotates slowly and at high power. The strapping band is tensioned with a pair of wheels of which one wheel is an idler wheel and the other wheel is a tensioning wheel powered in the tensioning direction by a motor and with its shaft mounted in a pivoting lever in such a way that the wheel presses against the strapping band, which is to some extent looped around it, while the band is being tensioned and rests on the idler wheel, with a force that increases with the tension in the band.

Abstract: A method and apparatus are provided for controlled grinding of roller surfaces. A rotary drive rotates a roller and a grinding wheel is rotated, which has a rotation axis parallel to the axis of the roller. The rotating grinding wheel is pressed against the rotating roller at a certain position along the axis of the roller. The grinding wheel is moved along the direction of its axis. Simultaneously, the surface of the roller is tested with an eddy current test probe disposed substantially at a corresponding position along the axis of the roller as the grinding wheel, however, the eddy current test probe is staggered with respect to the grinding wheel by a suitable angle around the roller axis. The signals from the eddy current test probe are processed by an analog-digital converter and then by a digital processor.

Abstract: An arcuate or circular profile element of generally V-shaped cross-section has a curved bottom wall, arcuate sidewalls having free edges, and laterally projecting flanges projecting from the free edges. By choosing specific relationships between the thickness of the different parts of the element, lighter-weight elements can be used to withstand the same loads as before, or elements having the same weight as before can be used to support heavier loads.

Abstract: A safety mounting for large antifriction bearings comprises rolling members disposed at a first bearing ring, a second bearing ring engages the rolling members, and a combined attachment and retainer provision is disposed at the first bearing ring and positively locks the second bearing ring. The attachment aspect of the provision provides for mounting of connecting constructions to the bearing ring. These safety mountings are particularly suited for large antifriction bearings at excavators, dredgers and cranes. The combined attachment and retainer provision allows to save material, space and time.

Abstract: A light-weight large-diameter antifriction bearing is composed of a plurality of bearing rings each of which is in turn composed of rounded hollow profiles which together define the bearing race for the anti-friction rolling elements. Each hollow profile has a circumferentially complete cross section.

Abstract: The invention concerns a procedure and a mechanism for washing textiles in a tub-type washing machine with a horizontally arranged tub, in which during the washing and rinsing cycles the tub is driven with a rotational velocity at which the centrifugal velocity at the tub case is between 0.4 and 0.95 g, so that the textiles are repeatedly lifted up, and then fall in a trajectory onto the lower portion of the tub, and that between the washing and rinsing cycles and after the last rinsing cycle the tub is driven at spin speed, and in which the washing or rinsing liquid is led into the suds container and is supplied to the textiles by immersing the tub in the liquid or by at least one spray nozzle spraying into the tub continuously or at intervals.

Abstract: An arrangement for producing double conical springs from heated rod-shaped material, in which one side of a conical-shaped spring is formed with a cylindrical end corresponding to the largest winding diameter. The end is then shaped to a conical form. After being transferred from a spring winding station to an end roll-in unit, the spring is clamped, and a shaping member is inserted radially into the spring, and moved against a stop. With the aid of a roll-in head, the cylindrical spring end is conically formed. After the shaping member is radially removed from the spring, the latter is released and transported to a hardening process.

Abstract: A hot-rolling mill has a rough-rolling section and a finish-rolling section. These sections are transversely offset from one another and the end of the rough-rolling section is connected to the beginning of the finish-rolling section by a heating station. Within the heating station, at the end of the rough-rolling station, is mounted a take-up coiler for the rough product. This coiler can transfer its product coil to a pay-out coiler which is either movable transversely between the two sections so that it can move to the second path and feed the product into the second or is fixedly mounted at the beginning of the second (finish-rolling) section in which case a transporting device is provided which transports the coils from the take-up coiler to the pay-out coiler.

Abstract: Improved steel profiles having superior material characteristics are obtained by rolling a precipitation-hardenable fine-grain steel, cooling it from a final rolling temperature above the A.sub.1 -temperature down to a temperature of about 400.degree. C. in an atmosphere in which it is allowed to overage, whereupon the steel plate or strip is then cooled down to room temperature and cold-processed to form an open profile [which can thereupon be converted into a tube by welding together its longitudinally extending edges and] which is then subjected to solution-annealing in order to dissolve coarse precipitants and subsequently further cooled to form finely dispersed precipitants in the profile.

Abstract: A method and an apparatus for testing the tightness of a threaded connection between an oilfield pipe and a tapped connector. An annular space along the threaded connection is sealed with a test head, and only the threaded connection is thus subjected to internal hydraulic pressure via this connection.

Abstract: A method for the continuous, quasi-static and contactless determination of the width of hot rolled products within a rolling mill train, preferably of hot wide band, via diode line cameras on which the two side edges of the illuminated rolling mill product are projected. The position of the illuminated edges of the rolling mill product is measured by alternating-current fed lamps in successive measuring cycles of 10 msec. Immediately following the exposure, the resulting electrical charge on the diodes within a measuring cycle in a period of 200 usec used, is scanned (sampled). Scanning is always at the maximum of intensity of illumination of the lamps. The electrical charge on the diodes for facing edges may be simultaneous, and the bright-dark transitions of the projected edges may be detected in the diode lines. The diodes darkened by the rolled product are counted in the diode lines above the two edges.

Abstract: A device for detecting surface flaws of rapidly moving metal strip in rolling mills includes a lens which scans the sheet material surface and a camera tube which converts optical images of the lens into electrical values. These values are stored in a magnetic storage and are called out to be converted and displayed on an image reproducing device as a visible image. At least one image amplifier or image converter tube is interposed between the lens and the camera tube and includes an electronic speed shutter.

Abstract: Sheet-metal ring mount for anti-friction roller bearings has an inner and an outer race ring each composed of two sheet metal annuli both of which have a flange portion and a race portion. The race portions of two annuli together bound two sides of the four sides of the race in which a series of anti-friction rollers is received for rotation in such a manner that the axis of rotation of successive rollers extend at right angles to one another.

Abstract: A loop lifter for continuous strip rolling mills has an arm which is journalled in a support for pivotal movement about a horizontal axis. An end portion of the arm carries a freely turnable roll which can engage a loop from below and lift it upwardly. A counter balancing spring reacts between a fixed pivot and the arm and assures that the pivot shaft for the arm is not subject to any free torque during pivoting movement of the arm between 0.degree. and 90.degree. of arc.