Abstract: Abstract A method is proposed for establishing a telecommunications connection from at least one subscriber line (1, 2) to at least one other subscriber line (1, 2) of a public telecommunications network (3), which is distinguished in that the telecommunications connection (5) for the at least two subscriber lines (1, 2) is established via a local connecting unit (4), and the local connecting unit (4) transmits data relevant to the telecommunications connection to a central control system (13), and data are transmitted from this control system (13) to the local connecting unit (4).

Abstract: Ferries in particular may have identical drives at the bow and stern in order to avoid turning the ship when the direction of travel changes. Normally, when travelling, the rotation speed of the front screw is selected to be lower than the rotation speed of the rear screw. According to the invention, minimum-value regulation of the sum of the recorded real power levels of both drive systems is used for efficiency optimization. In the case of the associated arrangement, a regulator (10) is provided, with the real power levels of both drives as input variables, that rotation speed of the bow screw at which the sum of the real power levels is a minumum being determined in the regulator (10).

Abstract: A vibration damper for a shock absorber strut is described which is arranged on a piston rod above the elastic body-side bearing facing away from the vehicle wheel. The damper comprises a mass element which is connected with a carrier plate, in which case the element is fastened on a centric pot element by way of radially extending elastic arms, the pot element being held on the free end of the piston rod above the elastic bearing.

Abstract: In a device for damping torsional vibrations of the body of a convertible vehicle, an elastically mounted weight is used. The damper is mounted elastically on a frame of a windshield by slide bearings and at a distance from the frame, relatively free to vibrate in the transverse directions of the vehicle. The damper has a frequency equal to the torsional natural frequency of the vehicle in the area of the frame, with the bearings having a sliding resistance determined by their geometry. The damper is elastically mounted by at least one central slide bearing on the frame element, with the damping weight having a leaf spring element at each end and mounted to abut the frame element and to permit transverse movement of the damping weight.

Abstract: For the absorbing of natural frequencies of the vehicle body, a vibration damping supporting strut for a motor vehicle has an axially movable absorber mass in a hollow space of the piston rod extending in the direction of the longitudinal axis. The absorber mass is in each case supported on its ends by way of a spring element arranged in a clearance of the hollow space. These clearances are filled with a medium and are connected with one another by at least one passage in the absorber mass. This construction results in an absorber effect on the natural torsional frequency of the vehicle body in that an absorbing takes place of the high-energy shock portions which have the same frequency and are introduced from the power section by way of the piston rod, whereby the shocks exciting the vehicle body are then largely absorbed.

Abstract: A damper is provided on a convertible for the dampling of bodyside torsional vibrations in the area of the windshield frame. This damper is arranged particularly on the frame of the windshield and is held by way of elastic slide bearings. The damper is arranged in the open at a distance from the frame and can swing relatively freely in the transverse directions of the vehicle so that natural torsional frequencies of the vehicle on the frame are damped.

Abstract: A centrifugal pump has a housing which defines an annular chamber disposed downstream of the impeller and surrounding the shaft seal. The chamber receives a hollow cylindrical or frustoconical shroud which surrounds the shaft seal with spacing and protects it from solid particles in the conveyed fluid. A non-contact type annular seal between the impeller and the housing surrounds the shroud.

Abstract: Disclosed is a method to detect the rotor resistance of an asynchronous machine, wherein a first vector attached to the emf of the machine is determined by computing the emf-vector or the flux vector from the stator voltages and the stator currents; wherein a flux attached to an arithmetic model circuit is determined, whereas the arithmetic model circuit uses the stator currents and the rotor position of the machine and an adjustable model parameter for the rotor resistance as basic quantities and imitates the dynamic events leading to the magnetic flux of the machine; wherein a difference of two quantities is determined, wherein the first quantity represents a defining quantity of the first vector attached to the machine and the second quantity represents a respective defining quantity of a second vector derivable from the imitated flux and that the setting of a model parameter is varied until the value of the difference is a minimum, whereas the model parameter corresponding to the minimum of the difference

Abstract: A vector analyzer which serves for determining defining quantities of a planar vector in which the output of a digital counter is fed, via sine and cosine function generators, to a vector rotator addressed by the component voltages of an input vector and made to follow the value of the phase angle of the input vector by means of a three point control in order to make the output of the digital overflow counter follow the phase angle of an input vector by means of a control loop; the counter content is reset to zero without problem if the value 360.degree. of the phase angle is exceeded. The invention can be used particularly for field orientation control of rotating field machines.