Abstract: A machine unit which includes a refrigerating compressor and an internal combustion engine of the trochoid type including pistons revolving in a planetary arrangement on eccentrics of the same eccentric shaft, as well as a ventilatable intermediate sealing arrangement provided in a central casing element between the casing elements of the internal combustion engine and the compressor.

Abstract: A method and apparatus for producing metallic heat exchanger tubes having a heat exchange surface that is increased by fins. A rotating tube has helically wound on its outer surface a strip that forms the fins, with this strip being fed to the tube surface under tension, and with the bottom edge of the strip being welded to the tube. The contact surface that exists between the tube and the bottom edge of the strip, and that extends helically on the surface of the tube, is fused exclusively at the surface of the tube with a laser beam that is directed in the region where the strip runs onto the surface of the tube, and that fuses a portion of the tube surface that in the axial direction of the tube corresponds at least to the width of the bottom edge of the strip and in the circumferential direction corresponds approximately to the same amount. At the same time, the laser beam fuses the bottom edge of the incoming strip in the region where the strip runs onto the surface of the tube.

Abstract: A method and apparatus for checking the concentricity of a pneumatic vehicle tire that during operation has its beam portions mounted on the radially inner periphery of a wheel rim. The apparatus includes a two-part test rim, the two rim ring sections of which are axially movable. Disposed against the test rim is a tire that is to be checked, with this tire being manufactured with trapezoidally axially outwardly directed sidewalls, and with the tire being disposed against the rim ring sections in this trapezoidal form. Bead-receiving rings are moved axially from the outside against the axially moved-apart rim ring sections. These bead-receiving rings fold-over the sidewalls and bring them, in a rim-seating position, into contact against the rim ring section. The tire is secured in position between the rim ring sections and the bead-receiving rings.

Abstract: A radiation cooling unit for cooling dust-laden gas. At least one cylindrical radiation heat transfer surface is disposed in a tank adjacent to, and extending essentially along the length of, an inner wall of the tank. First knock-or impact-beating devices disposed externally of the tank act upon the cylindrical heat transfer surface through the wall of the tank. A plurality of essentially radially and axially extending, partition-like radiation heat transfer surfaces are disposed within a free space in the tank, and each comprise axially extending tubes and at least one header. Second knock- or impact-beating devices are disposed externally of the tank, extend through the cylindrical heat transfer surface, and act upon radially outwardly disposed edges of the partition-like heat transfer surfaces, with the length-to-width ratio of the latter being such that they are adapted to be accelerated and cleaned by the second knock- or impact-beating devices.

Abstract: A turning tool for machining the edges of plastic lenses in a machine for machining the edges of lenses. A grinding wheel is coaxially connected to a cutter in such a way that they both rotate together. The grinding wheel is provided with respective rough grinding, fine grinding, and bevelling portions.

Abstract: A curved slide member having an inner section and an outer section, with one of these inner and outer sections being movable relative to the other, which is fixed. A Z-shaped rack is fixedly mounted on one of the inner and outer sections. A pinion is carried by that inner or outer section on which the rack is not mounted, with the pinion meshing with the rack.

Abstract: A heater mechanism that includes a combustion chamber that is heated by open flames of a combustion gas generated from solid, liquid, or gaseous fuel, with heat being transferred from the combustion chamber to a heat-carrier that, for indirect or direct transfer of heat to a room that is to be heated, is conveyed via at least one flow-producing mechanism, which is driven by an electric motor that is supplied with power obtained from at least one thermoelectric generator directly from the heat generated by the flame in the combustion chamber. This generator is embodied as a plate-like semiconductor element having a cold side and a side that is to be heated. The cold side is disposed in the inlet region for still-cool heat-carrier, or in the vicinity of the ambient air. The side that is to be heated is disposed either in the convection range of the flame of the combustion chamber, or in the exhaust gas stream from the latter.

Abstract: A pneumatic-spring bogie, particularly for high-speed rail vehicles. These vehicles need a drive device for the bogie, which transmits not only tensile and impact forces but also absorbs vibration, particularly in the longitudinal direction. To this end, first and second rubber buffers are provided that surround the bogie pin in the longitudinal and transverse directions respectively in order to drive the bogie. The free end of the bogie pin is pivotably connected by a damping member to the cross-member of the bogie frame. Advantageously, the pivot point of the bogie is placed in a region between the rubber buffers and the damping member. Secondary suspension is effected by a pneumatic-spring bellows that is disposed concentrically to the bogie pin.

Abstract: A device for disengaging a suction mechanism from a lens. A housing is provided that has an upper supporting rim for a lens. The device also has a gripping member that is adapted to grasp the base of the suction mechanism in a forceps-like manner. The gripping member is accommodated in the housing in such a way as to be axially movable therein. When the gripping member moves out of a starting position and away from the supporting rim, the lens is drawn against the latter and can be diengaged from the suction mechanism.

Abstract: Ring injectors for aerating fluids, useful for example in flotation systems, have a housing with a mixing section, in which air is added to the through-flowing fluid through an annular slot. A core is arranged in the center of the mixing section. An air-solid mix is formed in the mixing section by deposition of air bubbles on solid particles. An annular injector with a slot width (Q.sub.2) that leads into the airing chamber with a minimum opacifying speed of 2.0 m/s at the inlet of the aerating chamber, has an annex mixing and dispersing section (6) with a cross-section that remains the same until the end (12), as well as a middle piece (10) centrally arranged therein also having a constant cross-section, the length of the mixing and dispersing section (6) being 20 times the width of the annular slot (Q.sub.3). The distributing cone (2) and the middle piece (10) can be screwed together or inserted into each other. The air slot can be regulated by spacing rings (13).

Abstract: A machine for grinding the edges of a lens via a set of different grinding wheels for rough and finish grinding of the lens. The machine includes a machine housing, a holding element mounted in the housing for holding either the lens or the set of grinding wheels and movable in two directions relative to the other, with these directions being at right angles to one another, a support element provided on the housing, and a toothed-wheel gearing for effecting the movement of the holding element, and hence of the lens or set of grinding wheels disposed thereon, in one of the two directions, with this gearing including a toothed rack on the holding element, and a driven pinion on the support element, with the pinion being coaxially mounted on the support element along with a drive motor, a coupling, and a potentiometer.

Abstract: A method and apparatus of introducing and joining diaphragms in slotted walls. The slotted inner connecting pipe of one diaphragm is introduced into the slotted outer connecting pipe of another diaphragm. An apparatus for fusing together the two connecting pipes is placed within the interior of the inner pipe and can move through the latter. The apparatus has a heating device for heating and fusing the two connecting pipes together.

Abstract: An exterior mirror for a vehicle, including a base mounted on the vehicle, and a housing, for a mirror body, mounted on the base in such a way as to be pivotable to the front and to the rear relative to the forward direction of travel of the vehicle. A lever arm is mounted on the base in such a way as to be pivotable in the direction of pivot of the housing. One end of a swivel arm is directed toward the base and is hingedly connected with the lever arm. One end of a tension spring is connected to that end of the swivel arm that is remote from the base. A second end of the tension spring is connected to the base in the vicinity of where the lever arm is mounted on the base. The housing is connected to the swivel arm, in the vicinity of that end of the latter remote from the base, in such a way that the housing is pivotable about either its front or rear edge against the force of the tension spring.

Abstract: A transfer bridge for a ramp or a dock. The bridge includes a bridge plate, the back end of which is pivotably mounted via a shaft that is disposed in supports. A locking element prevents the shaft from accidentally lifting out of the supports. At the top, the locking element extends about the shaft, and at the bottom, below the shaft, the locking element is detachably connected to the dock.

Abstract: A flexible manufacturing system for machining workpieces. The system encompasses several tool machines, a storage unit that includes several tool shelves that are disposed along a guideway and have recesses for holding the tools. The guideway is disposed directly adjacent the row of tool machines, and the shelves have horizontal bottoms for supporting tools in a perpendicular manner. A transporting unit transports tools from the storage unit to a transfer station, with the transporting unit having a horizontally disposed pivot arm assembly for transporting tools in a perpendicular position. A changing device is adapted to grasp a new tool from the transporting unit and a used tool from a tool machine in two planes that are perpendicular to one another, and to pivot these tools by 180.degree. to bring them into planes that are perpendicular to the planes that they were in when they were grasped.

Abstract: A honing process using a honing machine as a honing arbor or spindle, the travel or stroke limit points of which can be set, and that also has a measuring device, with at least one sensor, mounted on the honing tool for the workpiece that is to be honed, as well as a regulating mechanism for controlling the honing process. The workpiece is measured during the honing process via the sensors, and during at least one measurement procedure, at least one parameter of the honing procedure is at least reduced.

Abstract: A flaring tool and flaring apparatus for cylindrically flaring the ends of tubes. The flaring tool is provided in the vicinity of one end thereof with flaring elements that are fixedly connected thereto and have an at least approximately spherical shape. The flaring elements are essentially in point-type contact with the tube and generate high specific deformation forces during flaring. When the flaring tool is rotated about its axis, the tube end is continuously flared. The flaring apparatus has an adapter that can be shifted via a thread connection. The adapter fixedly accommodates the flaring tool, and can be connected to a drive unit.

Abstract: A tire chain having a tread portion that connects an inner portion with an outer portion. The inner portion is provided with a closure, one closure member of which, from a starting position, can be connectable and releasable from the other closure member via a twisting movement. In the twisted position, a return force is operative that acts in the direction toward the starting position. The torsional movement of this one closure member can be easily undertaken. The return force that is operative in the twisted position automatically returns the closure member, after its release, into its starting position, whereupon the closure is properly closed.

Abstract: A cap to cover all sides of the end of a supporting body of a hammer mill rotor. The cap has two side walls, each end of which is provided with an approximately rectangular opening. In the direction of rotation of the rotor, the cap has a forward transverse wall and a rear transverse wall, each of which is provided with openings for a securing element or a plug. Each transverse wall also has a planar, inwardly directed surface, with these surfaces being directed approximately toward the center of the rotor and forming equal acute angles symmetrically relative to a plane that extends through the hammer shaft and an axis of rotation of the rotor. The inwardly directed surface of the forward transverse wall rests upon a forward end face of the supporting body. A filler member having a rectangular cross-sectional shape fills the gap between the rear inwardly directed surface and a planar rear abutment surface of the supporting body.