Abstract: Sealed roller bearing with a plastic jacket, in which this jacket, continuing in the radial direction on at least one side of the roller bearing, is designed to form a seal by way of at least one ring lip with a shaft or the like, characterized in that the seal has annular grooves extending axially on both sides of the radial side surfaces, and in that at least one edge area in the transition from the bore surface to the radial side surfaces is designed as a tilting edge, which lifts the ring lip radially from the sealing surface during axial displacement.

Abstract: There is disclosed a hydraulic tappet comprising a bucket element which slides inside a seat and houses a second bucket element that slides over an annular member integral with the first bucket element in such a manner as to form a first chamber. A deformable annular element is arranged around the second bucket element in such a manner so as to form a second fluid tight chamber connected hydraulically to the first chamber. The chambers are filled with drive fluid and the passage of the fluid from the second chamber to the first chamber is controlled by an on-off member.

Abstract: The belt stretcher unit is designed for assembly on a drive provided with a flexible member, e.g. for motor vehicles and consists of a pin, pivoting round a first axis, and of a pulley turning on the pin round a second axis eccentric with the first; the pulley is supported on the pin by at least one rolling bearing, and between the pin and the bearing, provision is made for an annular element made of elastic material.

Abstract: In a method for supplying thermal energy by means of a plasma arc heater to a reactor filled with solid, lump reduction material, the thermal energy is supplied via an outer or transferred arc, one electrode of which is formed by the heater and the other electrode of which is formed by the reduction material in the reactor.

Abstract: A method of and apparatus for effecting rapid, reliable and risk-free, pressure-tight connection of a plasma generator to a reactor, such as a shaft furnace for metal oxide reduction. First electrical contact means arranged on a plasma generator, substantially enclosed by a cover, automatically connect the plasma generator to stationary second contact means when the plasma generator is moved by remote-control to a fully installed operating position from a partially installed sealing position in which the plasma generator has its front end partially inserted in the reactor tuyere and seals the reactor. A remote-controlled valve, which seals the reactor from the surroundings when the plasma generator is in an outer completely retracted position, is opened once the plasma generator is in its sealing position, after which the plasma generator is moved to its operating position.

Abstract: A roller, especially a tension roller for a belt drive has a hollow hub supporting a rolling bearing, with a pulley or rotating body supported on the outer ring of the bearing. The hollow hub has at least one closed end, with a mounting hole therethrough to enable mounting to a machine frame. The closed end or bottom of the hub is setback from the adjoining facing end of the hub, by an axially projecting annular rim. The hub may be formed of one part, or of two parts, each having a setback closed bottom.

Abstract: A hydraulically operating clutch release includes a housing having a pressure chamber sealed by a roll membrane. A clutch bearing is axially displaceable in the housing. A support body abuts the roll membrane in the chamber, and resiliently engages the bottom surface of the pressure chamber in the axial direction, to prevent damage to the roll membrane.

Abstract: A clutch release, in particular for automobile clutches, comprises a sliding sleeve having a radially outwardly directed flange and an annular groove, a clutch release bearing having an outer ring with a flange that slidably abuts the sliding sleeve flange, and a generally oval-shaped spring ring having a pair of mutually parallel guiding surfaces. The spring ring is arranged between the outer ring and the annular groove at points mutually displaced in the axial direction. The bearing is arranged to rotate relative to the sliding sleeve in the circumferential direction within predetermined limits and to move in a radial direction along the guiding surfaces by overcoming a radially acting frictional force between the slidably abutting flanges. The spring ring has a substantially bow-shaped profile and is slotted. The inner ring of the bearing has a radially outwardly directed pressure flange for abutting with the diaphragm spring of a clutch.

Abstract: A rolling bearing having an inner and outer race and at least one row of rolling members between the races, and sealing rings closing off the space between the races externally, each of which consists of an annular element of a rigid material, for example a metal, the outer edge of which is accommodated in an annular groove in the outer race of the rolling bearing and a sealing element, attached thereto, of an elastic material having a lip-shaped part which, with respect to the annular element, projects inward and rests against the inner race of the rolling bearing, characterized in that the annular element is a flat ring which closes off the space between the races, except for a relatively narrow slot between its inner peripheral edge and the inner race, and the sealing element of an elastic material likewise has essentially the shape of a flat ring, the outer peripheral part of which and the element of a rigid material are joined, so that the inner peripheral part projects outside the inner periphery of the

Abstract: A rolling bearing unit with a pair of axially spaced grooves in the shaft, rolling bearing elements in the grooves, sheet metal outer race elements secured in a housing, and an adjusting ring for driving one of the outer race elements axially relative to the housing and to the other race element.

Abstract: The invention relates to the recovery of chemicals from waste liquor from wood pulp process, primarily black liquor, while utilizing energy liberated. Controlled total vaporization of the pulp waste liquor at high temperature and low oxygen potential is achieved by the external supply of energy. During the subsequent condensation and separation a melt or water solution is obtained which, without causticizing, can be used for the preparation of white liquor, and also an energy rich gas and mainly free from sulphur, consisting primarily of carbon monoxide and hydrogen.

Abstract: Finely powdered oxidde ore is introduced (at 17) in a reactor (11), possibly together with slag-formers, and treated in three zones in the reactor. The material is preheated and possibly melted in an upper, oxidizing zone by the combustion of carbon monoxide and hydrogen gas from the middle zone below with a gas containing oxygen. In a middle zone consisting of a slag bath, the preheated and possibly melted oxide material at least partially reduced by the simultaneous injection of carbonaceous material and/or material containing hydrocarbon (15, 16) and thermal energy supplied primarily by means of gas heated in a plasma generator (14). Finally, the material is caused to sink into a lower zone at the bottom of the reactor, from where it is tapped intermittently, together with the slag, through a tapping aperture (19).

Abstract: The invention refers to wheel-shaped objects such a pulley discs, which incorporate a rigid internal hub, a rigid outer circumferential part and a web interconnecting these parts and being of a material which has a higher coefficient of thermal expansion than the hub and the circumferential part.The invention is characterized therein that the web portion in circular cross-section has a zigzag-like design and that through-grooves are made in the web portion, where this connects to the circumferential part, thus that the material of the web portion at cooling can disengage itself from the circumferential part at these grooves thereby to prevent not desired tensile stresses to develop.

Abstract: A device for providing a clamping joint comprises two elements (1,2) with complementary threads, each having a flange constituting a clamping surface. Clamping takes place upon relative axial displacement of the elements (1,2) which can be brought about by screws (4) arranged axially in bores in a flange (5) on one element. In order to prevent accidental disengagement of the elements, at least one of the threads adjoins at one end to a part (6) which is wedged against an opposing thread flank when the elements (1,2) are rotated in relation to each other over a predetermined end position.

Abstract: A seal for roller bearings having inner and outer rings, especially for bearings in electrical machines, comprising at least two sealing disks spaced a certain distance apart on one or both sides of the rolling elements between the rings, one of said sealing disks being attached to one of the bearing rings and with its free end engaging in an annular groove in the other bearing ring, and where the gap between the disks is sealed by flock fibers, characterized in that the one sealing disk, on its free edge near the annular groove, has flock fibers projecting perpendicularly from its surfaces, which fibers are arranged to make slight frictional contact with the surfaces of the annular groove and with the opposite lateral surface of the other sealing disk said other sealing disk being slotted and nonrotatably mounted in the annular groove and having, on the lateral surface facing the sealing disk, a layer of flock fibers, the free ends of which are in contact with the sheet metal part of the sealing disk.

Abstract: The invention relates to a conveyor chain having a number of links connected by cardan joints. Each link has a main portion (2) and a fork portion (3, 4) the fork surrounding the main portion of an adjacent link. A rotatable element (6) is arranged in a bore (5) in the main portion and a pin (7) extends into each fork leg from the rotatable element. In order to improve strength and provide largest possible contact surfaces in the members possible against the pin, the pin is fixed in the element (6) and slidable in bores (9) in parts (10, 11) extending from the respective fork legs.

Abstract: A device for fastening e.g. a bearing ring on a shaft comprises a clamping sleeve and a clamping member co-operating with the sleeve. The clamping member and the sleeve contact each other over wedge-shaped surfaces. The sleeve surfaces intended for contacting the bearing ring and the clamping member have such shape that the clamping force acts essentially on that part of the sleeve which co-operates with the clamping member, and no appreciable axial displacement takes place between the sleeve and the bearing ring. Thereby the bearing ring keeps its shape and position during mounting.

Abstract: Calcium carbide is prepared from a powdered lime material. The powdered lime material, possibly together with a reducing agent, is injected with the aid of a carrier gas into a plasma gas generated by a plasma generator. The heated lime material, together with any reducing agent used and the energy-rich plasma gas, is then introduced into a reaction chamber substantially surrounded on all sides by a solid reducing agent in piece form. When the lime material consists of quicklime, this is melted and reduced to liquid carbide and when the lime material consists of powdered limestone, it is burnt directly in the reaction zone to form liquid carbide.

Abstract: A radial ball-and-socket bearing having an elastic outer ring for receiving a ball-shaped element. An annular, axially directed recess is formed in the front surface of the outer ring, and a plurality of axially directed slots extend radially therethrough from the front face. The slots and recess define sets of inner and outer tongues which flex to enable insertion of the ball-shaped element in the bore of the outer ring. At least one of the confronting surfaces of the radially adjacent inner and outer tongues is provided with one or more ribs, which are separated from the facing tongue surface by a gap when the bearing is unassembled and which are nearly or completely closed when the bearing is assembled. The circumferential surface of the outer ring has radial projections in the area of the recess for snapping the outer ring into the bore of a housing.

Abstract: In a rolling bearing assembly including at least two contact metal surfaces, such as a rolling bearing engaging a housing and a shaft, a homogeneous elastic layer is fixedly applied to one of said contacting surfaces, the outer surface of this layer having high density and extreme smoothness for full intimate contact with the contacting metal surface to avoid fretting corrosion between said contacting metal surfaces.