Abstract: A dental treatment or examination system having a plurality of dental instruments and a supply unit coupled to the dental instruments. The system includes means to identify the contact of a selected dental instrument from the plurality of dental instruments by a human hand and initializes, based upon an identified contact of the selected dental instrument, the supply unit for an operation of the instrument. When the selected instrument is contacted by a human hand, the supply unit may automatically make available activation or parameterization options for the selected instrument and/or suitable cleaning media available to an operator of the selected instrument.

Abstract: A system for driving an electric handpiece in response to a pneumatic control signal may provide for fast interchange of handpieces, self-calibration and wide dynamic range of operation with precise speed control. The system may be incorporated into virtually any dental treatment center using traditional pneumatic drive handpieces, and a conversion kit may facilitate such conversion. The system may provide not only for controlling the speed and torque of a tool coupled to an electric drive handpiece responsive to a pneumatic control signal, it may also provide for coupling cooling air and treatment media, such as air and/or water to the handpiece. Coupling of a handpiece to an operating base of the system, including coupling of media lines and electrical connections may be made with a simple press and twist action using quick connection structure.

Abstract: The invention relates to a dental treatment or examination system having a plurality of treatment or examination instruments and also having a supply unit coupled to the treatment or examination instruments. In this connection, the system has means to identify the contact of a selected instrument from the plurality of instruments and initializes, as a function of an identified contact of the relevant instrument, the supply unit for an operation of the instrument. Using the means to identify the contact it is thus possible to achieve a situation where the supply unit, for example, automatically makes available activation or parameterization options for the relevant instrument and/or suitable media without more extensive manipulation on the part of the user of the system being required therefor. As a result, the operation is facilitated.

Abstract: A method and device for determining the motor moment constant kM of an electric motor by measuring motor parameters on the running motor. For reduction of the previously considerable measuring effort it is proposed that firstly the generator voltage UEMK produced by the motor is measured, and in that the motor moment constant kM is calculated by division of the generator voltage UEMK and the speed of rotation fMot of the motor, taking into consideration at least one further constant. The method and the device are suitable for DC motors and for 3-phase synchronous motors.

Abstract: A method and device for determining the motor moment constant kM of an electric motor by measuring motor parameters on the running motor. For reduction of the previously considerable measuring effort it is proposed that firstly the generator voltage UEMK produced by the motor is measured, and in that the motor moment constant kM is calculated by division of the generator voltage UEMK and the speed of rotation fMot of the motor, taking into consideration at least one further constant. The method and the device are suitable for DC motors and for 3-phase synchronous motors.

Abstract: A method and device for determining the motor moment constant kM of an electric motor by measuring motor parameters on the running motor. For reduction of the previously considerable measuring effort it is proposed that firstly the generator voltage UEMK produced by the motor is measured, and in that the motor moment constant kM is calculated by division of the generator voltage UEMK and the speed of rotation fMot of the motor, taking into consideration at least one further constant. The method and the device are suitable for DC motors and for 3-phase synchronous motors.

Abstract: A system for driving an electric handpiece in response to a pneumatic control signal may provide for fast interchange of handpieces, self-calibration and wide dynamic range of operation with precise speed control. The system may be incorporated into virtually any dental treatment center using traditional pneumatic drive handpieces, and a conversion kit may facilitate such conversion. The system may provide not only for controlling the speed and torque of a tool coupled to an electric drive handpiece responsive to a pneumatic control signal, it may also provide for coupling cooling air and treatment media, such as air and/or water to the handpiece. Coupling of a handpiece to an operating base of the system, including coupling of media lines and electrical connections may be made with a simple press and twist action using quick connection structure.

Abstract: A system for driving an electric handpiece in response to a pneumatic control signal may provide for fast interchange of handpieces, self-calibration and wide dynamic range of operation with precise speed control. The system may be incorporated into virtually any dental treatment center using traditional pneumatic drive handpieces, and a conversion kit may facilitate such conversion. The system may provide not only for controlling the speed and torque of a tool coupled to an electric drive handpiece responsive to a pneumatic control signal, it may also provide for coupling cooling air and treatment media, such as air and/or water to the handpiece. Coupling of a handpiece to an operating base of the system, including coupling of media lines and electrical connections may be made with a simple press and twist action using quick connection structure.

Abstract: A system for driving an electric handpiece in response to a pneumatic control signal may provide for fast interchange of handpieces, self-calibration and wide dynamic range of operation with precise speed control. The system may be incorporated into virtually any dental treatment center using traditional pneumatic drive handpieces, and a conversion kit may facilitate such conversion. The system may provide not only for controlling the speed and torque of a tool coupled to an electric drive handpiece responsive to a pneumatic control signal, it may also provide for coupling cooling air and treatment media, such as air and/or water to the handpiece. Coupling of a handpiece to an operating base of the system, including coupling of media lines and electrical connections may be made with a simple press and twist action using quick connection structure.

Abstract: In a method of operating a brushless electric motor, having a permanent magnet rotor and a stator with three windings electrically offset by 120°, provided for example for driving a dental treatment instrument, the zero crossings of a voltage induced by rotation of the rotor in the stator windings is detected by a comparison of a voltage at an inactive stator winding in a monitoring phase with a comparison voltage, and on the basis of the detected zero crossings there is determined the speed of rotation of the motor and/or a suitable commutation point for an intermediate circuit voltage delivered to the stator windings. The comparison voltage is formed by the voltages at the two further, active stator windings in the monitoring phase.

Abstract: The invention concerns a method and a device for determining the motor moment constant kM of an electric motor by measuring motor parameters on the running motor. For reduction of the previously considerable measuring effort it is proposed that firstly the generator voltage UEMK produced by the motor is measured, and in that the motor moment constant kM is calculated by division of the generator voltage UEMK and the speed of rotation fMot of the motor, taking into consideration at least one further constant. The method and the device are suitable for DC motors and for 3-phase synchronous motors.

Abstract: A control device for the drive of a dental handpiece has visual or acoustic indicating means for generating a warning signal if the torque exerted on a tooth to be worked or the material removal power exerted on a tooth to be worked exceeds a predetermined limit value.

Abstract: A method for producing bound books, magazines or brochures by gathering printed sheets into non-bound book blocks along a conveying section that is supplied by at least one sheet feeder includes separating the lowest printed sheet from a stack of printed sheets by lifting one edge region of the lowest printed sheet from the bottom of the printed sheet stack, withdrawing the separated lowest printed sheet with the aid of a conveying element from the remaining sheet stack by gripping the separated edge region with the conveying element, and subsequently withdrawing the separated lowest printed sheet in a direction parallel to the longitudinal extension of the edge region of the remaining sheet stack. The apparatus includes a separating device that lifts up the printed sheet at the stack front and a conveying element that pulls the printed sheet from the stack where both are arranged jointly on a removal unit.

Abstract: The invention relates to a control device for the drive of a dental handpiece operated with a regulated electric motor. So that a dentist has an acoustic feedback concerning the loading of a tooth worked with the dental handpiece, the control device is so configured that a speed of rotation characteristic dependent on the load of the electric motor, starting from an initial point, falls with increasing motor current or increasing power, wherein at least one of the initial point, the inclination, and the development of the falling characteristic is selectable.

Abstract: In a method of operating a brushless electric motor, having a permanent magnet rotor and a stator with three windings electrically offset by 120°, provided for example for driving a dental treatment instrument, the zero crossings of a voltage induced by rotation of the rotor in the stator windings is detected by a comparison of a voltage at an inactive stator winding in a monitoring phase with a comparison voltage, and on the basis of the detected zero crossings there is determined the speed of rotation of the motor and/or a suitable commutation point for an intermediate circuit voltage delivered to the stator windings. The comparison voltage is formed by the voltages at the two further, active stator windings in the monitoring phase.

Abstract: The invention relates to a device for the determination of the inclination of the roadway in a vehicle, with an arrangement (4), for at least the indirect determination of parameters, which at least indirectly characterize the inclination of the roadway. Said arrangement (4), for the at least indirect determination of parameters which at least indirectly characterize the inclination of the roadway, forms a construction unit (5) with a device (1) which may be operated by the driver for setting a driver command which alters or sets the driving state of a gearbox unit.