Abstract: An improved arrangement for securing a plate-type cooler in metallurgical furnaces is disclosed. The cooler comprises a cast body including embedded cooling pipes provided with protective tubes which are run into the cooler body and secured to the outlets of the cooling pipes. At a first level, at least one of the protective tubes is designed as a fixed support and the other tubes at the same level are designed as horizontally displaceable supports to allow for a thermal expansion. At a vertically opposite level, at least one of the protective tubes is designed as a vertically displaceable support and the other tubes extending at the same level are designed as movable supports.

Abstract: An improved rotor compressor, particularly a screw-type compressor, for compressing a gas is disclosed. The compressor is provided with a housing having an annular drain space surrounding rotor shafts at a location between each shaft bearing and the working space for removing escaping lubricant and gas. The drain space is connected through a drain passage to a closed collecting chamber which is substantially under the intake pressure of the compressor. A return passage is provided for returning gas to at least one of the intake and the working space of the compressor and for returning lubricant to a lubrication circuit.

Abstract: An electrode holder is disclosed particularly for smelting furnaces which comprises an electrode arm, a fixed contact to the arm and a movable contact movably mounted to the arm. A biasing spring is connected in the mounting of the movable contact on the electrode arm to bias the movable contact toward the fixed contact to hold an electrode between the two contacts. A fluid pressure cylinder is provided in the electrode arm which acts on the movable contact to counteract the force of the spring to release the electrode from between the contacts. The fluid pressure cylinder is supplied by a fluid motor, fluid pump and fluid reservoir combination which is mounted as a constructional unit within the electrode arm. The fluid may be hydraulic or pneumatic. Electrical power is supplied to the motor by an electric line and air is supplied to a compartment containing the motor pump and reservoir combination. Flexible pressure fluid lines are therefore not required.

Abstract: A piston for internal combustion engines, especially for high-performance internal combustion engines. The piston has several ring grooves for piston rings, and an oil control groove which is provided below the top ring groove, is separated therefrom, and opens only towards the cylinder bore. The land between the topmost ring groove and the oil control groove, seen in cross section, is designed as a support having constant bending stress and has a finite height at its outer surface. The inner confine of the oil control groove has a finite radius or rounded-off section to avoid an increased stress concentration factor.

Abstract: A gas seal for a rotatable shaft of a housing which comprises, a first rotatable dimensionally stable seal ring connected to the shaft. A diaphragm is connected to the housing which exerts an axial bias on a second rotatable seal ring. The bias of the diaphragm provides a gap space between the rotatable and fixed seal ring which is supplied with a sealing gas. The material of the fixed ring is different from that of the diaphragm. A compensating ring is connected unilaterally to the fixed ring and of a material at least partly the same as the fixed ring. A slide seat is defined between the compensating ring and the fixed ring to permit axial movement of at least a part of the compensating ring. This part is connected in turn to the diaphragm so that stress free transmission of axial thrust is provided between the seal ring and the diaphragm.

Abstract: Axle suspension for a road vehicle, particularly a motor bus, including a subframe arranged between the drive wheels and the vehicle body. The subframe encompasses a torsionally flexible, flexurally rigid cross support member having rigidly fastened thereto, in a cranklike manner proximate each end, an axial trailing link. The axial trailing links are pivotably supported on the vehicle body at their free ends, and the wheel bearings of the drive wheels are located at approximately the central region of the axial trailing links. A differential is fastened on the vehicle body.

Abstract: A cylinder head produced having partially reinforced cylinder heads, particularly of internal combustion engines, providing a preformed workpiece of a predetermined material composition, and casting on said workpiece a material capable of producing a bond with said predetermined material composition for forming a positive connection between said workpiece and said casting material, including a cast portion; and a preformed workpiece positively connected to said cast portion for reinforcing those parts of said cast portion which are highly stressed during use.

Abstract: The temperature of the working gas in the heating chamber of each of a number of cylinders is continuously measured. An electronic selection circuit selects the lowest measured temperature as a control parameter by which the speed of a blower in the common air supply is controlled for providing an air flow proportional to blower speed. A pressure-detecting device measures the air flow through a pressure converter provides an electrical signal that normally controls the valves of the respective fuel supplies for the combustion chambers of the cylinders, but a monitoring device for each cylinder compares the measured working gas temperature with a pre-set maximum value so that when the maximum value is exceeded, the fuel supply valve is changed over to control by the output of the monitoring device, to reduce the fuel supply until the maximum temperature is no longer exceeded in that cylinder.

Abstract: In a device for the treatment of synthesis gas produced by coal gasification, a vertically extending shell is connected to a coal gasification reactor so that the interior of the shell is in direct communication with the interior of the reactor. The interior surface of the shell is lined with upwardly extending heat exchange tubes. Additional heat exchange tubes in combination with the tubes lining the shell form a plurality of upwardly extending chambers projecting radially inwardly from and spaced angularly apart about the tube lining. Tubes coextensive with the heat exchanger tubes forming the lining, are located within the chamber for conveying a cleaning fluid. The tubes are arranged to direct the cleaning fluid approximately tangentially of the heat exchanger tubes lining the shell for cleaning the exterior surfaces of such tubes.

Abstract: Apparatus for purification of synthesis gas produced by coal gasification is provided with a vertical gas distribution chamber which is internally pressurized and within which the synthesis gas leaving the reactor is cooled. The chamber is formed with a gas take-off line which opens into the gas distribution chamber and extends therefrom at an angle, the gas take-off line leading to a serially connected waste heat boiler. A coolant bath is contained in a lower portion of the gas distribution chamber and a heat exchanger is formed in this lower portion by tube coils which are arranged in the wall of the distribution chamber defining the lower portion.

Abstract: A fuel injector, for internal combustion engines, having a nozzle needle supported in a nozzle body so as to be axially displaceable therein. The nozzle needle, which can be lifted off its valve seat by the pressure of fuel, has a throttling pin which, at least during part of its lift, projects below the valve seat into a bore centrally arranged in the nozzle body. The throttling pin has at least one control edge or flat portion which is shaped and oriented in such a way that the fuel spray direction and/or the fuel spray characteristic or pattern vary with the nozzle needle lift.

Abstract: Swirl tube or chamber apparatus is provided for separating isotope or gas mixtures of a process gas having heavy and light gas fractions intermixed. This apparatus includes a swirl chamber having feed ports issuing tangentially thereinto for feeding processed gas to be effectively centrifuged in the swirl chamber. Extraction elements are provided for extracting the heavy gas fraction from the outer walls of the swirl chamber and for extracting the light gas fraction from the interior of the cylinder near the longitudinal axis thereof. The swirl chamber is a rotatably support chamber which is symmetrically configured with respect to its center. In particularly preferred embodiments, the process gas fed into the swirl chamber also serves to form a bearing cushion for the container, as well as for imparting driving forces to the container to rotate the same.

Abstract: A process and apparatus for the separation of gas bubbles from a liquid which is subjected to a flow, in which a flowing portion of the liquid is brought into contact with an arcuate wall at an opening and deflected into a relatively quiescent liquid along a surface, so as to produce a vortex at the contact surface between the two liquid portions in such a manner as to project the vortex into the flowing portion as well as into the relatively quiescent portion, and whereby its axis extends in parallel or almost parallel to the contact surface, so that gas bubbles will be conducted from the flowing liquid portion by the vortex into the relatively quiescent liquid portion, from which the gas bubbles will then separate out under the influence of buoyant force.

Abstract: Supporting structure for reflectors consisting of interconnected supporting bars arranged in parallel spaced relationship, having the reflectors mounted thereon side by side in a single plane. The length of the bars is at a maximum the width of one reflector. At least two of these supporting bars are interconnected through transversely directed cross-members which, in turn, are fastened onto a central upright extending essentially parallel to the supporting bars.

Abstract: A method and arrangement for the traversing of critical rotational speeds of elongate rotors. At least one critical frequency altering means in the form of springs, dampers and masses may be operatively connected, singly or in combination, to the rotor to thereby produce a change in the frequencies and/or amplitudes of the rotor, or in the critical rotational speeds and their amplitudes.

Abstract: To provide for engagement between adjacent bearer rings throughout their entire engagement line or surface, in spite of slight misalignment or tilting of the actual axis of rotation of the shaft of the printing cylinder with which the bearer ring is associated, the bearer ring is located on the shaft of the printing cylinder with a slightly spherical engagement surface, preferably by attaching a hub to the shaft having a slightly convex outer surface which matches a slightly concave inner surface of the bearer ring. Preferably, a shock-absorbing, wear-resistant elastic material is interposed between the respective engagement surfaces. To permit alignment of the bearer ring with respect to the cylinder, and exact concentricity, eccentric alignment pins are provided, engaging the bearer ring and the end face of the printing cylinder, at least three such attachment arrangements being located circumferentially on the end face of the printing cylinder, and bearer ring, respectively.