Abstract: The invention relates to a method and a device for controlling the displacement process of a hood system. According to the invention the following steps are provided: provision of a first number of position sensors (20-22,25,26) to determine the actual position of the hood system, the first number of position sensors being greater than a second number of position sensors which are required as a minimum for determining the position of the hood system, determination of a third number of functioning position sensors, from the first number of position sensors, comparison of the first number with the third number and movement of the hood system into a defined position so long as the third number is less than the first number.

Abstract: The invention relates to a protection circuit (12) for an access-arbitrated bus system network, comprising a fault detection device for detecting a fault status in a sub-network of the overall bus system network; and a separating device for separating the sub-network from the overall network when a fault status is detected in said sub-network.

Abstract: A sealing ring has a support member and a sealing lip connected to the support member. The sealing lip rests against a machine part to be sealed. The sealing lip has a passage for the machine part, wherein the passage points to an air side of the machine part to be sealed and has a contact side provided with a return conveying device for a medium to be sealed at a medium side of the machine part. The return conveying device is an alternating twist structure that is formed by angularly staggered, crossing elliptical structures, crossing straight structures, sine-shaped structures, or arcs.

Abstract: A measuring apparatus has a sensor element that produces an output signal proportional to a variable to be measured. An integrator which, beginning at a starting value, integrates the output signal from the sensor element. A comparator is connected downstream of the integrator, compares the output signal from the integrator with a threshold value, and outputs an output signal corresponding to the result of the comparison. A reset device that is likewise connected downstream of the comparator and resets the integrator to the starting value at specific times. This is a simple way of achieving integrability in autonomous modules.