Abstract: A running wheel block, including a housing having at least one connecting surface for connection to a supporting framework, and further having two opposing, detachable side walls, two inwardly directed rotary bearing holding hubs, arranged in the housing, rotary bearings mounted in the hubs, and a running wheel mounted in the rotary bearings so that a section of its running surface projects from the housing toward at least one side. Each of the holding hubs is arranged on one of the two opposing side walls of the housing. The housing further includes at least one spacing holder arranged between the opposing side walls. The spacing holder forms a connecting surface. The detachable side wall has centering members that, when the side wall is attached to the housing, determine the position of the holding hubs relative to the running wheel axis.

Abstract: A running wheel block, including a housing having at least one connecting surface for connection to a supporting structure, two inwardly directed rotary bearing holding hubs arranged in the housing, rotary bearings mounted on the hubs, a running wheel mounted in the rotary bearings so that a section of its running surface projects from the housing toward at least one side and a cover connected to the housing so as to close the housing. The holding hubs include a first holding hub that is arranged on the cover. The cover has centering members for fixing a position of the holding hub relative to an axis of the running wheel when the cover is closed.

Abstract: The invention relates to a process for operating a guided vertical mold, especially for the continuous casting of a steel billet, which is oscillated by a lifting device. According to the invention, the driving force (F), the lift position (x) and/or the lifting speed (v) of the mold are detected by measurement technology, and a mold lifting movement is preset in a computer model as a target variable. Finally, a difference of the mold lifting movement, representing the measure of frictional force between the billet and the mold, is fed as a control variable to actuators by means of a circuit arrangement.

Abstract: A process for closing a tap hole in a metallurgical vessel at least partially filled with a metal melt includes bringing a compressible fire-resistant material to the moth of a tubular closing element, providing a medium that substantially prevents contact between the fire resistant material and the metal melt, passing the closing element through the melt toward the bottom of the vessel, compressing the compressible material against the bottom of the vessel to form a seal between the outside of the closing element and the tap hole below the closing element, and moving a cut off device over the outside of the tap hole, thereby allowing the tap hole to be filled with a pourable refractory compound via the tubular closing element. A device for performing the process for closing a tap hole includes a tubular closing device with a groove at an end bottom facing the bottom of the metallurgical vessel.

Abstract: The present invention relates to a process for rolling a roll material through a roll stand having work rolls and support rolls and having devices for balancing and positively and negatively bending the work rolls mounted in chucks of the work rolls. The process includes setting a balancing force by moving the work rolls against the support rolls without clearance when the roll gap is open by using the piston-cylinder units for positive and negative roll bending, setting the pressure in the piston-cylinder units for negative bending so as to attain the roll gap correction needed under load to control the profile and flatness of the roll train and setting the pressure in the piston-cylinder units for balancing and positive bending higher than the amount of balancing force needed.

Abstract: A supersonic device including an elongated mixer-diffuser housing having first and second drive nozzles arranged axially and tandemly therein. The first and second drives nozzles are arranged in first and second cylinder parts, respectively, of the mixer-diffuser housing. A conical first mixer part is disposed between the first and second cylinder parts and defines a first mixing zone therein. The second drive nozzle further comprises a generally conical displacement body, preferably configured as a supersonic cone or wedge, which extends into the conical first mixer part.

Abstract: A hydraulic pressure control valve, in particular a hydraulic power brake valve. A known valve of this type has, in a valve housing, a valve bore, into which, at an axial distance from each other, a supply channel, a load channel and a tank channel debouch, and a control piston which is arranged in the valve bore and which can be displaced in a first direction into a first end position defined by a stop in which the supply channel and the load channel are connected with each other and in a second direction into a second end position in which the load channel is connected with the tank channel, and which can assume a control position between them.

Abstract: A process for the cyclic control of extruders which facilitates the precise control of an extruder to achieve maximum output and at the same time optimal quality of the extruded profiles. Accordingly therefore the extrusion velocity is controlled in such a way that the profile exit temperature is constant and equal to a prescribed temperature trajectory. Thereby the extrusion velocity and the profile exit temperature are measured over the complete cycle interval for each and every cycle k, and with the knowledge of the relationship between these quantities and the trajectory of the extrusion velocity of the cycle k, the trajectory of the extrusion velocity for the (k+1)th cycle is determined, such that the control error and the control effort are as low as possible and after completion of the (k+1)th extrusion cycle the whole process is repeated for every subsequent cycle therefore until the whole extrusion program is completed.

Abstract: Reservoirs (11, 12) for printing equipment whether they are ink reservoirs, inked ribbon cassettes or toner reservoirs comprise an electronic memory means (14) in the form of a chip in which information about the current fill status of the reservoir and/or other status data, for example expiration date of the printing medium, that are relevant for the printer operation are stored. The used status of printing medium is acquired via the central controller (16) of the printing equipment and is communicated to the chip (14). The chip at the reservoir counts consumption until the supply of printing medium (ink fluid, inked ribbon, toner) exhausted to such an extent that the reservoir must be replaced. A reprogramming of the chip and, thus refilling of the reservoir is not possible.

Abstract: Parasite arcs which occur during the operation of plasma torches have an adverse economic effect and endanger important parts of the torch. Countermeasures of the prior art are only partly effective. Equipping the annular passage between the electrode and the surrounding nozzle which carries the plasma gas with an electrically insulating lining on the inside of the nozzle provides only partial protection. To insulate the segment of the inner wall part of a water-cooled nozzle adjacent to the end wall part by means of insulating parts penetrating the wall part in question from the outer segment is very expensive and complex, depending on the design and the choice of insulation materials. The invention proposes that secondary passages be distributed uniformly between the annular passage for the plasma gas and an annular passage between the nozzle endpiece and the torch casing, uniformly over the circumference.

Abstract: An immersion nozzle (2) for metallurgical recipients, in particular for a reservoir arranged upstream of a continuous casting ingot mould, has an interchangeable discharge pipe (2) which can be attached in a leakproof manner on or in a perforated brick (1). To improve the flow conditions and hence the efficiency of the casting, the inlet side of the nozzle comprises an upper elongated section (12) in the form of a tubular shaft (11) which expands conically downward to a given plane and which is narrow in a plane perpendicular to the given plane. A second elongate section (13) ends in an elongated transverse flow section of given dimensions.

Abstract: A telescopic tower for suspension from an overhang trolley, crane, or the like, have a lowermost tube for carrying a work area or platform, is constructed in that the tubes are of polygonal cross-section with inwardly, as well as outwardly projecting rails in corners of the polygon, rollers on the respective tubes run on these rails.

Abstract: The invention relates to an installation and a process for the generation of electrical energy with a unit for the discharge of H.sub.2 -rich gas (H.sub.2 -unit A), with a fuel cell system, whose anode chamber (8a) has a H.sub.2 -feed line (2) from the H.sub.2 -unit (A), and with a gas turbine (19) and a combustion chamber (17), and with a compressed air generation unit (10) connected for drive purposes to the gas turbine (19), and is essentially characterized by the fact that the H.sub.2 -feed line is the only fluid connecting line between the H.sub.2 -unit (A) on the one hand and the fuel cell system (B) and the compressed air generation unit (C) on the other hand. Thus the compressed gas containing O.sub.2 is used exclusively for the feed into the cathode chamber of the fuel cell, and if necessary, is partly used directly for the generation of the combustion gas for the compression drive.

Abstract: A replaceable ink reservoir for an ink printer [means comprises a means to] prevent unauthorized refilling and includes[. This means can be composed of] a magnetic contact element [(13)] arranged in the ink reservoir or [can be composed of] a clack valve arranged in the delivery region of the ink reservoir.

Abstract: A process and apparatus for the vacuum treatment of metals. In a tightly sealed vacuum treatment vessel, molten metal is preferably divided, on the surface, into a generally circular sector and a generally ring-shaped sector surrounding the generally circular sector. Preferably, each sector of the molten metal is exposed to different vacuum pressures during vacuum treatment, wherein a generally lower vacuum pressure is applied to the ring-shaped sector than to the circular sector. The two sectors are preferably separated to an immersion depth, in the molten bath, of between 10 and about 20 cm, as measured starting from the ring-shaped sector.

Abstract: An ultrasound testing device for the non-destructive testing of a workpiece wherein at least three testing heads are disposed on a testing head carrier, and the testing heads emit sound waves which converge at one or more intersections in an area of the workpiece so as to detect defects and determine the wall thickness. Operationally, the number of intersections is one less than the number of testing heads, and the separation between the sound waves is chosen so as to avoid the disturbances associated with utilization of oppositely situated testing heads. In addition, the device uses a flow medium to couple the testing heads to the surface of the workpiece.

Abstract: Apparatus for providing heat to a reaction chamber in which an endothermic reaction is performed under utilization of hot smoke gas includes a barrier, preferably a tubular barrier at least partially enclosing the reaction chamber but being spaced therefrom; hot smoke gas is fed to a ring chamber outside of the barrier and caused to flow there along while losing some of its heat content until at a lower end of the barrier the flow of the cooled smoke gas is reversed and the gas is introduced into a gap between the barrier and the reaction chamber so that heat is transferred through the barrier from the hot smoke gas as it flows along the outside of the barrier to the gas as it flows in the gap for heating the reaction chamber in an essentially uniform manner.

Abstract: The roll and roller has a core with a threaded on sleeve of differently radially high threads such that the crown or head of one thread reaches the bottom/foot of the thread groove way of the other, but not vice versa so that a spiral channel is established while the abutting foot/crown configuration is welded indirectly as a weld layer is deposited onto the outer surface of the sleeve.