Abstract: A polymerizable, radiopaque dental composition including: one or more ethylenically unsaturated, polymerizable monomer and/or polymer, possible conventional fillers, pigments, initiators, activators, and thixotropic auxiliary material, as well as, in addition, a heavy-metal fluoride with very low solubility selected from the group consisting of complex heavy-metal fluorides having the general formula M.sup.II M.sup.IV F.sub.6, where M.sup.II is a calcium, strontium, or barium ion, and M.sup.IV is a titanium, zirconium, or hafniun ion. These filler compositions exhibit excellent X-ray visibility along with excellent optical properties.

Abstract: A method for gaseous carburization of steel, where, in a carbon-rich gaseous atmosphere, an article that is to be carburized is, in a first carburization phase, exposed to a carbon charge that is as great as possible, at the black limit, and, in a subsequent diffusion phase, a lower carbon charge that corresponds to the desired carbon content at the surface of the article is established, with carburization being regulated via the two target values carbon content at the surface and depth of carburization. In order, independent of the carbide limit, to provide a regulation with which it is possible to achieve in a straightforward manner, reliably and reproducibly, the desired carbon content curve (carbon profile) in the article, at least one further target value that is characteristic of the carbon content curve is used to regulate the carburization. When this additional target value is reached, the carbon level that characterizes the carburization phase is reduced, and the diffusion phase is initiated.

Abstract: The present invention relates to a method incorporating a sorter, cyclone and thickener for removing sludge from water, and includes the step of separating the inorganic constituents or matter in the sludge, such as stones, gravel, sand, etc., from the organic constituents or matter thereof, such as wood, roots, etc. The inventive method is also suitable for processing sediment that contains decaying organisms.

Abstract: An anchoring rail that includes a hollow section which is provided with a slot that extends in the longitudinal direction, with each of the sides of the slot being provided with a toothing that is engaged by a corresponding toothing on a latching plate that is wider than the slot and is part of a mounting element. In order to increase the capacity of the mounting element to take up loads applied in the longitudinal direction of the anchoring rail, without the mounting element being displaced, the load-carrying surfaces of the toothings, which are in contact with each other in the longitudinal direction of the anchoring rail, are oriented at right angles to the plane defined by the slot.

Abstract: Internal mixer with hydraulic cylinders (31 to 34) that are symmetrically disposed about the charging hopper (2). The floating weight (20) is driven via a movable crosspiece (22) and a shaft (21) for the floating weight. A low overall construction of the internal mixer is achieved. In the mixing operation position of the floating weight (20), the upper piston chambers (41) communicate with a first pressure reservoir (64), and the lower piston chambers (42) communicate with a second pressure reservoir (78), so that the hydraulic actuating mechanism (30) effects a resilient retention of the pistons (40) and hence of the floating weight (20), which therefore can retreat resiliently in the mixing operation position relative to the material that is to be mixed.

Abstract: A method of producing a mixture that contains rubber or rubber-like material, and carbon black. The method includes the steps of adding to the rubber or rubber-like material a portion only of the intended total quantity of carbon black, thereupon preheating the above in a high-frequency alternating field, and subsequently adding in the remainder of the intended total quantity of carbon black. Expediently, approximately up to a maximum of one-third of the intended total quantity of carbon black is added to the rubber prior to the preheating step.

Abstract: A jump rescue apparatus having a jump surface which is made of a tensioned fabric that is carried by a support mechanism formed from inflatable tubes. To achieve dissipation of energy when a person who is to be rescued jumps onto the apparatus, the support mechanism, which is formed by a framework, has a covering extending around it. The support mechanism is elastically yieldingly deformable when a person jumps onto the apparatus. After the covering is relieved of the load of a person, it returns to its original shape. Furthermore, the covering is provided with a plurality of flow restrictors for the passage of air.

Abstract: A method and apparatus for securing one or more parts, each of which is provided with an opening, to a hollow member. In the starting state, the inner diameter of the opening of the parts is greater than the outer diameter of the surface provided on the hollow member for securing the part. The parts are placed in the prescribed position on the hollow member prior to the securing operation. In order in a simple and economical manner to reliably secure the parts to the hollow member without the danger of overstressing the latter, and without the danger that the parts will loosen, a temperature difference is produced, prior to placing the parts on the hollow member, by heating the parts and/or by cooling the hollow member. Subsequently, each part is secured to the hollow member by widening the latter at least in the securing regions thereof, and by a subsequent shrink fitting of the parts onto the hollow member as a consequence of the temperature equalization that occurs.

Abstract: With an airtight reaction vessel having a lining of refractory material for immersion in steel-processing ladles, especially for processing steel pursuant to the vacuum circulation process, including an upper vessel part, a lower vessel part, and immersion pipes, whereby these parts are interconnected via flange rings and clamping mechanisms that hold them together, the seal between the vessel parts is to be improved in every operating state. For this purpose, it is proposed that the respectively upper main flange (17) of the associated respectively lower vessel part (11, 13, 15) have a separate upper flange ring (19) that is placed upon the resilient end of an interposed compensator ring (20) and that in the unstressed state of the flange (17, 19) extends slightly beyond the upper rim of the vessel part (11, 13, 15).

Abstract: An exterior mirror for a vehicle, including a support or base mounted on the vehicle, and a housing that accommodates a mirror body and is mounted on the support or base in such a way that it is pivotable to the front and to the rear relative to the forward direction of travel of the vehicle. The housing is pivotable against a spring force in such a way that after a pivoting movement the housing returns to a normal position. A slide member is mounted to the housing and in the normal position of the latter rests against the base of an approximately V-shaped channel in the mirror base or support under spring force. During pivoting of the housing in one direction, the slide member, against the spring force, moves along one of the side surfaces of the channel, while during pivoting of the housing in the opposite direction, the slide member moves along the other side surface of the channel.

Abstract: A lens holder for an apparatus for grinding the edges of a lens. The lens holder includes two coaxial, rotatable shaft halves having adjacent ends between which the lens is held. One of the shaft halves is axially shiftable to permit insertion, securing, and removal of the lens. To secure the lens, the axially adjustable shaft half is connected with the piston of a piston/cylinder unit or with a portion of a worm or screw drive. To release the lens, the piston of the piston/cylinder unit, or the gear portion of the worm or screw drive, is manually axially moved along with the shaft half.

Abstract: A container having flexible walls. One or more layers of a high-strength load-carrying member are provided, with the member including meandering, aromatic, polyamide cords, with a cover material having a relatively slight adhesion to the cord. Where several layers of load-carrying members are provided, the meandering cords are angularly shifted so that the cords of one layer cross the cords of another layer.

Abstract: A profiled sealing member made of elastomeric material. The sealing member is disposed on a vehicle body, especially for sealing off side door window panes. Via a hollow space that can be pressurized or inflated, the profiled sealing member also extends about that edge portion of the window that is directed toward the outside of the vehicle.

Abstract: A method and apparatus for monitoring the supply of cap members from a magazine or supply bin, via a channel, to the capping mechanism of a capping machine. At least one signal emitter, which is provided at the channel, generates an emitted signal that changes as the cap members move past, with a disruption signal being derived from the emitted signal if this emitted signal does not change during a specified time interval. A cycle signal is derived from the working or machine cycle of the capping machine. If no change of the emitted signal is determined in two successive cycles, the sum of which correspond to a full period of the cycle signal, the disruption signal is generated.

Abstract: A lifting mechanism for the pressing roller of the feed mechanism of a crusher for scrap. The rotor of the crusher, via a lifting mechanism that acts upon a mounting bracket of the rotor mounting, can be removed from a split housing after an upper part of the housing has been raised about a horizontal pivot axis and has been secured in position relative to a lower part of the housing, whereby pivot arms are disposed on opposite faces of the housing and are connected to hydraulic cylinders, with free ends of the pivot arms being pivotably mounted about a horizontal axis, and with the pivot arms being successively connected with the upper housing part to raise the same, with the mounting bracket after the upper housing part is secured relative to the lower housing part in an open position and the pivot arms have again been lowered, and again with the upper part after the rotor is removed.

Abstract: A cylinder head and combustion chamber sealing arrangement that is subdivided into a sealing element in the cylinder liner region (especially for sealing gas) and a sealing element in the cylinder block region. Both sealing elements are made of solid metal. The sealing element for gas sealing, which is disposed in the liner-collar recess, is stressed in a certain range beyond the yield limit of the material by tightening the cylinder head screws. To improve the gas sealing, on the one hand a circumferential groove is provided in the cylinder head opposite the recess in the cylinder liner collar, and on the other hand the recess itself is provided with either a circumferential groove or a circumferential rib. By this means, the liner sealing element is stressed beyond the material yield level in the specific region of its outer and inner perimeters.

Abstract: Rotary pistons on shafts connected therewith counter-rotate in a blower machine casing having casing inner cylindrical surfaces and having an inlet and an outlet in the region of intersections of these casing inner cylindrical surfaces, the cross section of the inlet is approximately 1.35 times the cross section of the outlet. The rotary pistons are formed by two coaxial semi-cylinders having different radii with a ratio of 2.5 to 2.8 relative to each other. Transition surfaces are formed between the semi-cylinder with the large radius and the semi-cylinder with the small radius. These transition surfaces dovetail with the corresponding transition surfaces of the other rotary piston and together with the associated casing inner cylindrical surfaces. The side plates and the cylindrical surfaces of the semi-cylinder with the small radius form working chambers having variable volume therewith. The cylindrical surface of the semi-cylinder with the large radius terminates in an angle of 15.degree. to 25.degree.

Abstract: A narrow vent for aerating windshields of tractors, work machines, etc. The vent has a plurality of fins that spread the air stream that is directed onto a window in a fan-like manner. A portion of the fins, as side fins, are directed onto a region adjacent the vent, and the other portion of the fins, as main fins, are directed onto a region just ahead of the vent, with the angle provided by the fins corresponding approximately to a quarter circle. The air-exit plane provided by the vent extends at most insignificantly beyond the vehicle body part in which the vent is installed. All of the fins are partially recessed in the vent. The side fins are longer, and the outermost side fin is considerably longer, than the main fins.

Abstract: An eyeglass frame, especially for sport glasses, including a central portion for accommodating the lenses, as well as temple pieces that can be detached from the central portion. Each temple piece can be inserted through a hole or slot that is provided in each side region of the central portion. One end of each temple piece is provided with a widened portion that is adapted to come to rest against the central portion in the vicinity of a given hole or slot thereof. The entire length of each temple piece is adapted to be guided through a given hole or slot.