Abstract: The invention relates to a dynamically addressable slave unit, comprising a bus interface, an enable circuit having a switch and two control ports which are connected via the enable circuit. The enable circuit only releases the slave unit for assigning an address by an address signal provided at the bus interface when a control signal is provided at one of the control ports and when the switch of the release signal is open. Otherwise, the enable circuit locks the slave unit for the assigning of an address. The switch locks depending on whether a switching signal is provided at the bust interface directed to the address assigned to the slave unit. The invention further relates to a master unit for use with one or more dynamically addressable slave units, to slave units according to the invention, and to a method for dynamically addressing slave units according to the invention.

Abstract: The invention relates to a method for the unreleasable fastening of at least one component to a basic component with the aid of a bolt projecting through a bore in the component or components, first the bolt being welded electrically with one end face on the surface of the basic component and subsequently being deformed plastically. So that components consisting of any desired materials can be used, it is proposed, according to the invention, that the shank of the bolt, which has a head, be upset, until the underside of the head lies in regions on the surface of the component. Furthermore, an unreleasable connection of one or more components to a basic component is proposed.

Abstract: The invention relates to a dynamically addressable slave unit, comprising a bus interface, an enable circuit having a switch and two control ports which are connected via the enable circuit. The enable circuit only releases the slave unit for assigning an address by an address signal provided at the bus interface when a control signal is provided at one of the control ports and when the switch of the release signal is open. Otherwise, the enable circuit locks the slave unit for the assigning of an address. The switch locks depending on whether a switching signal is provided at the bust interface directed to the address assigned to the slave unit. The invention further relates to a master unit for use with one or more dynamically addressable slave units, to slave units according to the invention, and to a method for dynamically addressing slave units according to the invention.

Abstract: In a hydrodynamic torque converter having a turbine shell and a torsion damper spring carrier jointly mounted to a carrier part by way of rivets extending through aligned openings in the turbine shell and the spring carrier, rivets with rivet shanks and a rivet heads are inserted through the aligned openings and welded to the carrier part by pairs of electrodes by which the rivets are pressed into contact with the carrier part while a welding current is generated from one to the other of the pair of welding electrodes through the respective rivets and the carrier part.

Abstract: In a hydrodynamic torque converter having a long-life torque converter lock-up or bypass clutch with an axial piston structure for engaging the clutch plates of the clutch and fluid flow control structures are provided for supplying a controlled flow of lubricant to the clutch plates via the axial piston cylinder structure for lubricating and cooling the clutch plates and a torsion damper is provided adjacent the clutch and effective to reduce the transmission of torque oscillations to the vehicle transmission.

Abstract: The invention relates to a method for the unreleasable fastening of at least one component to a basic component with the aid of a bolt projecting through a bore in the component or components, first the bolt being welded electrically with one end face on the surface of the basic component and subsequently being deformed plastically. So that components consisting of any desired materials can be used, it is proposed, according to the invention, that the shank of the bolt, which has a head, be upset, until the underside of the head lies in regions on the surface of the component. Furthermore, an unreleasable connection of one or more components to a basic component is proposed.

Abstract: In a hydrodynamic torque converter including a working fluid for the transmission of a torque from an engine to an output shaft, a pump impeller, a stator with guide vanes, a turbine wheel connected to the output shaft via a hub-like support, a converter lock-up clutch for locking the pump impeller to the turbine wheel and a torsional vibration damper connected between the turbine wheel and the output shaft and including disk-shaped support elements, annular axially and radially extending gap seals are provided between two adjacent disk-shaped support elements of the vibration damper so as to form a labyrinth seal structure for controlling the flow of fluid through the converter lock-up clutch for cooling the clutch.

Abstract: In the case of an arrangement of a 2-path torsion damper unit and a friction disk clutch in a hydrodynamic torque converter, a coupling member for the torque transmission from the clutch to the torsion damper unit as well as the latter are fixed in their position with respect to the hub of a turbine wheel, particularly for avoiding wobbling.

Abstract: In an outer shell of a pump impeller of a hydrodynamic torque converter, an axial connecting branch of a hub is joined by friction welding to a bearing sleeve, which exhibits axial driving teeth for driving a recirculating positive-displacement pump. The friction welding apparatus uses a respective receiving fixture for holding the joint parts and a device for machining a weld bead with a tool.

Abstract: In the case of a turbine wheel of a hydrodynamic torque converter having a lockup clutch, a radial flange of a hub is connected on its faces, in each case, by means of friction welding, with one radial flange respectively of an outer shell holding turbine blades and of a disk support which non-rotatably holds clutch disks.

Abstract: In a hydrodynamic torque converter, an axial abutment is arranged to support friction discs of a lock-up clutch and a clutch actuator working pressure chamber accommodating an axial piston so as to move with a friction disc carrier. Together with a second friction disc carrier, the friction disc carrier torsionally holds the friction discs in alternating sequence and is also located in a centripetal flow between a pump impeller outlet and a torque converter return conduit.

Abstract: A process for the preparation of titanium dioxide by the sulphate process in which titanium raw materials are decomposed with sulphuric acid, the resulting titanyl sulphate is hydrolyzed, the waste acid is separated from the hydrolyzate and evaporated to a concentration of 60 to 70%, sulphuric acid is separated from the solid metal sulphates, and the sulphuric acid which has been concentrated by evaporation is used again for the decomposition of the titanium raw material, the improvement wherein the 60 to 70% sulphuric acid is concentrated to 70 to 80% H.sub.2 SO.sub.4 in a further evaporation stage and the concentration of a part of this sulphuric acid is raised to a concentration of 98 to 99% H.sub.2 SO.sub.4 by the absorption of SO.sub.3 and then used together with the remainder of the above-mentioned 70 to 80% sulphuric acid for the decomposition of titanium raw materials.

Abstract: The invention pertains to a control circuit for a collectorless DC motor where at least one power transistor (14, 16) is input-connected to each stator coil (2, 4) of the motor; said transistor is driven by at least one rotor position sensor, especially a Hall generator having commutation circuits to commute the motor current, and where a blocking protection device is provided to interrupt the motor current in an overload or blockage. The blocking protection device (26) has at least one semiconductor circuit (30) carrying the motor current which is switched through or blocked depending on its temperature.

Abstract: Method and apparatus for driving an alternating-current motor. A sinusoidal supply AC voltage is rectified into a pulsating, unsmoothed DC voltage, with sinusoidal half waves and from this DC voltage an alternating-current motor voltage is produced by means of controllable polarity reversal. The pulse width of this alternating-voltage of the motor can be modulated. The polarity reversal takes place in accordance with the supply frequency in such a way that the AC voltage of the motor is essentially composed of the sinusoidal half waves of the pulsating DC voltage. For this purpose, the motor speed can be altered by changing the AC voltage of the motor with a constant timing frequency, lying outside the range of audibility, into pulse-width modulatable voltage pulses.

Abstract: Energy required for the calcining or drying operations in the production of titanium dioxide by the sulfate process and the chloride process is at least in part provided by burning by-product offgases containing carbon monoxide obtained in the chlorination of titanium-containing raw materials under reducing conditions.

Abstract: In the production of nitrobenzene by subjecting benzene to nitration with a mixture of nitric acid and sulfuric acid, separating off the nitrobenzene formed, concentrating the sulfuric acid by evaporation and returning the concentrated sulfuric acid to the bezene nitration stage, the improvement which comprises concentrating sulfuric acid to a concentration of from 75 to 92% by evaporation in vacuo at temperatures in the range from 130.degree. to 195.degree. C. Thereby the energy per kg of water evaporated is drastically reduced compared to processes wherein the sulfuric acid is concentrated to a higher level, without a corresponding loss in efficiency or capacity.

Abstract: An improved process for the preparation of TiCl.sub.4 comprising(a) chlorinating a raw material containing titanium and vanadium impurities to produce a crude TiCl.sub.4 reaction product,(b) separating the crude reaction product into solid by-products and TiCl.sub.4 -containing liquid,(c) reacting the TiCl.sub.4 -containing liquid with a reducing agent whereby vanadium impurities are converted into solid compounds, and(d) separating TiCl.sub.4 from the solid vanadium compounds, is improved by adding solid products of the vanadium reduction reactions to the crude TiCl.sub.4 reaction product prior to the separating step (b).

Abstract: In the desulphurizing of SO.sub.2 - and hydrogen halide-containing flue gases by catalytically oxidizing the sulphur dioxide on moist active carbon at a temperature of from 45.degree. to 70.degree. C. with the formation of 3 to 20% dilute sulphuric acid, the improvement which comprises contacting the dilute sulphuric acid with the hot flue gases to be desulphurized so as to evaporate water resulting sulphuric acid of a concentration of from 60 to 85%, and removing by evaporation the hydrogen chloride and hydrogen fluoride dissolved in the dilute sulphuric acid. Advantageously evaporation is carried out in two scrubbing stages, the hydrogen chloride and hydrogen fluoride being removed, by vacuum evaporation or by stripping with air or flue gas, from a mixture of the dilute sulphuric acid from the second scrubbing stage with the concentrated sulphuric acid from the first scrubbing stage, the mixture having the H.sub.2 SO.sub.4 concentration of from 40 to 70%.

Abstract: In a lock-up clutch, an annular piston has a clutch friction disc connected to the annular piston and a seal hub, which is connected to the annular piston and rotatably slipped over a counterseal hub. A damper using a spring and a damper supplying frictional resistance are located on the end face of the annular piston facing towards the casing shell. The dampers are connected, on the drive side, with at least one damper drive part connected to the annular piston and, on the output side, with a radially inner clutch hub positively engaged to a rotor hub connected to the turbine rotor.The pressure surface of the annular piston is designed independently of the dimensions of the dampers because the counterseal hub is fixed on the rotor hub. A front hub protrusion connected rotationally solidly with the clutch hub and facing the rotor hub centers damper discs.

Abstract: The invention procides a circulation evaporator for concentrating mineral acid, particularly sulphuric acid, comprising parts of, or at least coated with, enamel, characterized by a heat exchanger for heating the acid comprising at least one acid feed pipe provided with an enamel layer, means being provided to maintain the compressive stress in the enamel layer under all working conditions, said acid feed pipe being connected at its inlet end to a circulation pump and at its outlet end to a flash evaporator for concentrating the heated acid, this evaporator being connected by a circulation pipe to the pump inlet and to means for introducing the crude acid, for discharging the concentrate and for carrying away the vapors.