Abstract: A level transmitter for liquid containers, particularly fuel store tanks, comprising a housing in which a contactless sensor is arranged which is connected with an evaluating unit and operatively connected with a magnet that moves relative to the sensor when a float arranged at a first end of a lever moves so that the change of the magnetic field acting upon the sensor is transformed into an electric signal so that an output signal corresponding to the level of the liquid in the container is obtainable by the evaluating means. The magnet is configured at least as a segment of an annular magnet that is arranged at a second end of the lever and integrated therein.

Abstract: In a method for controlling a switching flap (10) arranged in an intake pipe connected with an internal-combustion engine the switching flap (10) is rotated with the aid of a switching-flap shaft (12) connected with an electromotor (18). With the aid of a position-detecting means (22,26; 24,26) an end position of the switching flap (10) is detected. Subsequently, a rotation force is continued to be applied to the shaft (12) to hold the switching flap (10) in the end position. For detecting a breakage of the switching-flap shaft (12), an error message is generated when the switching-flap shaft (12) continues to rotate beyond the end position.

Abstract: The invention relates to a control device for a motor for adjusting a control unit. A motor (5) that serves for adjusting a control unit (20) is shut off in a known control device with at least one Hall switch, when the control unit (20) has achieved a desired position. In the aforementioned variant, it is proposed that the running direction of the motor (5) is determined by a signal (UH) obtained from such a Hall switch, and, if necessary, the motor (5) is prepared for reversal.

Abstract: A position sensor which is particularly suitable for the rotational angle detection of throttle or exhaust gas valves comprises a permanent magnet and at least two magnetic field sensors arranged adjacently to the permanent magnet. The magnetic field sensors are, for example, Hall sensors. By a relative movement between the permanent magnet and the magnetic field sensors, a position-dependent signal, for example in dependence on a rotational angle of the shaft, is produced. According to the invention, the two magnetic field sensors are arranged behind each other in field direction of the permanent magnet.

Abstract: The invention provides a level transmitter for liquid containers, particularly fuel store tanks, comprising a housing in which a contactless sensor is arranged which is connected with an evaluating unit and operatively connected with a magnet that moves relative to the sensor when a float arranged at a first end of a lever moves so that the change of the magnetic field acting upon the sensor is transformed into an electric signal so that an output signal corresponding to the level of the liquid in the container is obtainable by the evaluating means. It is characterized in that the magnet (5) is configured at least as a segment of an annular magnet (5) that is arranged at a second end of the lever (3) and integrated therein.

Abstract: The invention relates to a method for the automatic release and placement of orders by means of data communications devices, data concentration devices and telecommunication devices.

Abstract: A position sensor which is particularly suitable for the rotational angle detection of throttle or exhaust gas valves comprises a permanent magnet and at least two magnetic field sensors arranged adjacently to the permanent magnet. The magnetic field sensors are, for example, Hall sensors. By a relative movement between the permanent magnet and the magnetic field sensors, a position-dependent signal, for example in dependence on a rotational angle of the shaft, is produced. According to the invention, the two magnetic field sensors are arranged behind each other in field direction of the permanent magnet.

Abstract: A measuring device for determining the position of a control element, such as a throttle valve in which a temperature-resistant Hal sensor (4) cooperates with a permanent magnet (2), which is connected to the control element by a spindle (3), in order to obviate the need for a conventional mechanical potentiometer. By virtue of the Hall effect, the Hall sensor (4) produces during movement of the control element and thus of the position of the permanent magnet (2) relative to the Hall sensor (4), an output signal (Ua) that is preferably linearly proportional to the movement of the control element. The Hall sensor (4) is programmed to correct temperature, related measurement errors in the permanent magnet.