Abstract: This invention relates to a frictional element that shall prevent relative-movement between construction parts and comprises a metallic plate with projecting teeth.

Abstract: A tool has independently radially adjustable cutting edges. Adjusting drives are provided for each cutting edge. Each adjusting drive is laterally spaced from, and axially overlaps, an adjacent adjusting drive. Each adjusting drive comprises a servomotor which directly drives a screw. A screw nut is axially movable on the screw and is rigidly connected by means of a bridge with an adjusting piston arranged parallel thereto. The adjusting piston is axially movable and is connected by a bearing to a tubular connecting rod. Axial movement of the latter serves to radially adjust an associated cutting edge of the tool. The connecting rods of the adjusting drives are coaxially and telescopingly arranged.

Abstract: In the manufacture of cladding tubes of a zirconium-based alloy for fuel rods for nuclear reactors by extrusion of the zirconium-based alloy and cold rollings of the extruded product with annealings, intermediate annealings, between the cold rollings and a .beta.-quenching of the extruded product prior to the last cold rolling, a cladding tube is provided which has at the same time good corrosion properties and mechanical properties by performing the .beta.-quenching prior to a cold rolling, after which an intermediate annealing is performed at a temperature of 500.degree.-675.degree. C., and preferably at a temperature of 500.degree.-610.degree. C. The zirconium-based alloy is a zirconium-tin alloy comprising 1.2-1.7% tin, 0.07-0.24% iron, 0.05-0.15% chromium and 0-0.08% nickel.

Abstract: In a double band press the compressing pressure is applied to the endless bands by pressure plates via intermediate pressure rolls. The pressure rolls extend transversely to the running direction of the steel bands and are interconnected at their ends by a guide chain. More than two pressure rolls are associated with each pair of connecting bolts of the guide chain. The axes of the pressure rolls are parallel and are offset transversely relative to the axes of the connecting bolts of the guide chain. In this manner, a stable connection of the pressure rolls among themselves is made possible, with the pressure rolls having a smaller diameter and being capable of being arranged closely adjacent to each other. A more uniform and higher distribution of pressure may be obtained thereby.

Abstract: In the manufacture of cladding tubes of a zirconium-based alloy for fuel rods for nuclear reactors by extrusion of the zirconium-based alloy and cold rollings of the extruded product with annealings, intermediate annealings, between the cold rollings and a .beta.-quenching prior to the last cold rolling, a cladding tube is provided which has at the same time good corrosion properties and mechanical properties by performing the .beta.-quenching prior to a cold rolling, after which an intermediate annealing is performed at a temperature of 500.degree.-610.degree. C.

Abstract: A roller cutter assembly for rotary boring of the face of earth formations comprising a boring head (16) and a plurality of roller cutters (14) mounted in mounting members (15). The bearing shafts (25) of the roller cutters (14) are secured to the mounting members (15) by members of clamping bolts (30). For purposes of eliminating the risk for failure of the clamping bolts (30) to occur the mounting members (15) are provided with a cap portion (31).

Abstract: A crystallizing apparatus particularly for use with undercooled melts. Crystallizing is effected on the cooling conveyor belt in a thick layer. A precrystallizer comprises at least two rolls arranged above the cooling conveyor and rotating in the same direction. A shear gap is formed between the at least two rolls. A melt is applied to an uppermost one of the at least two rolls in a thin layer. In the course of the path followed by the melt over the at least two rolls, shearing forces are generated within the area of the shear gap, which enhance the nucleation. A further enhancement of nucleation is obtained by cooling the at least two rolls, so that relatively large volumes of the melt may be crystallized per unit time in the crystallizing apparatus without the need for the addition of supplemental seed crystals to the melt. The amount of melt in the precrystallizer is very small.

Abstract: A guiding means in rock drilling for guiding a percussion drill string (10) comprises a guide sleeve (17). For purposes of ensuring free rotation between the drill string (10) and the guide sleeve (17) the latter is bound by shape to the drill string at its one end during drilling as well as during withdrawal of the drill string (10).

Abstract: A drill tool for rotary and/or percussion drilling with drill rod means (14) within casing tube means (15) comprises a centric cutting bit (11) and an eccentric reamer cutter (12), both provided with hard metal inserts. For purposes of obtaining a life of the drill tool as long as possible the first frontal insert (23) on the reamer cutter (12) is positioned in front of the first peripheral insert (18) when seen in the rotational direction (D) during drilling, and the centric cutting bit (11) provided with more inserts on the half (38) of its front surface opposed to the reamer cutter (12) during drilling than on the other half (39).

Abstract: A device is disclosed for transferring pieces of goods onto conveyor belts or the like, particularly for pieces susceptible to deformation made from dough-like material, wherein pre-molded individual pieces are delivered to a conveyor belt and are transferred onto the same by a transfer device. The transfer device consists of a rotatable transfer table which is provided in the region of its periphery with swingably mounted transfer plates for the individual pieces and at least a part of the region of the transfer table is disposed above the conveyor belt, the transfer plates being downwardly swingable by a control device within the region of the table.

Abstract: This invention relates to a cutting tool comprising a cutting insert holder with a cutting insert positioned in a cutting insert receiving site and provided with a hole. The cutting insert is clamped by a locking screw positioned in the cutting insert hole and threaded into the cutting insert holder. The end part of the locking screw, which end part is positioned in the cutting insert hole, is excentrical relative to the rest of the screw and has a cross section deviating from that of the cutting insert hole. When clamping the cutting insert there is only a point contact between the screw and the cutting insert hole.

Abstract: A tool holder for carrying a cutting tool is attached to a drive spindle. For purposes of making possible a rapid and easy exchange of the tool holder while at the same time there is required a small working space the tool holder is carried by an adapter, which interiorly guides a pin on the tool holder. The tool holder is clamped against the adapter by applying a clamping force on a transversal abutting surface on the tool holder.

Abstract: A boring head for reaming a pre-drilled hole in raise boring or for similar earth cutting operations comprising a plurality of roller cutters (13, 14), each of which being rotatably journalled over a bearing system. The bearing system comprises a split roller bearing (60) having axially spaced rollers (62, 63) which are separated by a loose guide ring (69).

Abstract: An improved process for the production of coated cemented carbide products is disclosed. A cemented carbide substrate is treated to form a metal carbide, nitride or carbonitride coating. The coated substrate is heat treated at a temperature close to or near the melting point of the binder metal of the cemented carbide to diffuse elements from the substrate into the coating. An intermediate (second) metal carbide, nitride or carbonitride coating is thereafter applied and the portion of the second is oxidized, nitrided or sulfided without detrimentally affecting the adherence of the second coating. Thereafter, a wear-resistant oxide (e.g., aluminum oxide) coating is applied to form the improved coated carbide product.

Abstract: A boring unit comprises a rotary spindle and a tool support mounted therein. The tool supports includes a rearwardly extending headbolt and a rearwardly extending supporting arm. The supporting arm engages an inclined wedge surface, the latter being movable by a connecting rod so that the wedge surface imparts rotary movement to the supporting arm and to the tool support about an axis of adjustment which is oriented perpendicular to the axis of rotation of the spindle, thereby moving the tool in a radial direction. The headbolt of the tool support is retained within a chucking cage. The chucking cage is movable to a position for releasing the headbolt by means of the movable connecting rod.

Abstract: This invention relates to a saw guide bar comprising two side plates and an intermediate layer. Each side plate comprises a layer of reinforced plastic material and a layer of metal.

Abstract: A boring head for reaming a pre-drilled hole in raise boring or for similar earth cutting operations comprising a plurality of roller cutters (13-22). For purposes of extending the radius of the boring head (10) in operation or decreasing its dimensions during transport one or several extension elements (36, 37) are provided for detachable attachment to the boring head (10) by means of a wedge connection (42).

Abstract: A saw guide bar comprising a main part and a nose part detachably fastened to the main part, the joints between the nose part and the main part being displaced relative to each other in the direction of chain travel.

Abstract: An expansible mandrel for loading and unloading a work member while the mandrel is rotating, comprises a frame having an abutment and a mandrel body slidable in the frame. Two slide members are mounted for radial movement within first recesses in the body and each include a radial projection for pressing the work member against the abutment and an inclined surface facing radially inwardly. A piston is movable relative to the body and includes an inclined surface engageable with the inclined surfaces of the slides. A first spring urges the piston rearwardly to bring its inclined surface into engagement with the inclined surfaces of the slides and urge the latter radially outwardly into engagement with the work member. A second spring urges the body and slides forwardly.

Abstract: An improved sintered cemented carbide body and method for making same is disclosed. The improved sintered cemented carbide body contains at least one metal carbide and a binder metal, on which body there is applied at least one thin, wear resistant surface layer consisting essentially of aluminum oxide and is characterized in that at least 85% of the aluminum oxide consists of the kappa form, the remainder, which mainly constitutes the alpha form, being formed as surface portions or spots having a size of at the most 10 .mu.m, .[.the size and the occurrence of the surface portions being so adjusted that they lie within the area AOB in FIG. 1 of the attached drawing..].The body is made by a method wherein a cemented carbide substrate is contacted with a gas containing an aluminum halide and a reducing agent at high temperature, characterized in that a dopant addition of tetravalent titanium, zirconium and/or hafnium ions is added to the gas in an amount of 0.03-0.5% of the totally supplied amount of gas.