Abstract: A tension-adjusting device for a driving belt comprising a tension roller and having an engagement arrangement provided between a support of the tension roller and a machine frame for enabling stepwise swiveling movement about a partially disengaged mounting bolt. The axis of swivel is radially displaced from the rolling axis of the tension roller. The engagement arrangement comprises a projection formed on the support radially displaced from the axis of swivel and a plurality of depressions formed in the machine frame and arranged at regular intervals along an arc defined by the path of travel of the projection during swiveling, whereby the projection is engageable with each depression, thereby defining a corresponding step in a range of adjustment of the tension of the driving belt.

Abstract: The resilient block serves to connect a stem of a shock absorber of a suspension of a vehicle to the body thereof and is provided with a rolling element bearing keyed to the stem and provided with an outer ring having an annular groove on its outer cylindrical surface, engaged by an inner rim of a first frusto-conical support sleeve, a second frusto-conical support sleeve which can be fitted to the body, and an elastomeric sleeve directly vulcanized onto the outer lateral surfaces of the outer ring of the bearing and the associated frusto-conical sleeve and to the inner surface of the second sleeve to form a single indivisible unit.

Abstract: The invention relates to a method of destroying hazardous waste, by means of under-stoichiometric incineration at a temperature of at least 1200.degree. C., the ratio between injected waste material and oxidant being regulated to give a quotient CO.sub.2 /(CO+CO.sub.2) of less than 0.1.

Abstract: In this process for forming an internal screw thread in a tube or link made from a composite carbon fiber based material coated with polymerized resin, the part of the tube or link comprising the screw thread is inserted in the body of the tube or the link and molded on a threaded mandrel. This part of the tube or link where the screw thread is to be formed is polymerized substantially completely and under pressure on the threaded mandrel so as to obtain a preform comprising a hard internally threaded portion extended by non polymerized fibers; an expandable mandrel is introduced into this preform; the preform is inserted inside a tube which is already polymerized or to be cured; and finally polymerization under pressure of the fibers is provided by heating and causing the mandrel to expand so as to bond them to the fibers of the tube.

Abstract: A method and a means for continuously producing a preformed metal product through direct reduction of a material containing ferric oxide in a shaft furnace and feeding the product manufactured in the shaft furnace via a gas lock into a hot preforming machine, the hot product obtained from the shaft furnace being kept at the temperature required for the subsequent hot preforming process, preferably at least about 550.degree. C., by means of hot, non-combustible gas consisting primarily of N.sub.2 and/or CO.sub.2 which has been heated by excess heat from the shaft furnace.

Abstract: In combination, a bearing bushing for universal joints of generally cup-like form, a sealing ring for sealing a space between the bearing bushing and a shoulder of a machine part supported in the bushing, a circumferentially extending radially inwardly directed flange at the open axial end of said bearing bushing defining an annular interior recess, said sealing ring having a radially outwardly directed circumferential projection engaging in said annular recess interiorly of said flange, and means defining at least one axial opening in said sealing ring defining a passage connecting the running space of the bearing with an annular space outboard of the flange bounded by said flange and sealing ring.

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: 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: 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: 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: 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: 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.