Abstract: An electro-dipcoating apparatus is described in which, in conventional manner, a work-piece to be lacquered is dipped into a lacquer bath, moved through the latter, and lifted out again in a continuous process. Along the path of motion of the work-piece in the lacquer bath there are arranged electrodes which are connected to a first pole of at least one voltage source. Several contact rails extend parallel to one another without electrical interruption along the entire path of motion of the work-piece leading through the lacquer bath and are each connected to the second pole of varying voltage sources. To each work-piece a contact device is assigned which can be brought into communication with a respective one of the several contact rails and in this way applies the potential of the second pole of the corresponding voltage source to the work-piece. In this way, cuts in the contact rails are avoided that would result in wear of the contact devices and in increased control effort.

Abstract: A device and a process are described for non-contacting determination of a state variable, in particular the position, of at least one pipeline pig which is displaceable in a supply path. The pipeline pig includes a magnetic-field source. The device exhibits at least one sensor responding to the presence of the magnetic-field source. Said device is, in addition, provided with a circuit arrangement, to which the sensor-output signal of the sensor can be supplied and which generates an electrical output signal that is representative of the state variable of the pipeline pig at the sensor. A plurality of preferably identical sensors connected in parallel are arranged in succession along the supply path in the direction of motion of the pipeline pig.

Abstract: An electro-dipcoating apparatus is described in which, in conventional manner, a work-piece to be lacquered is dipped into a lacquer bath, moved through the latter, and lifted out again in a continuous process. Along the path of motion of the work-piece in the lacquer bath there are arranged electrodes which are connected to a first pole of at least one voltage source. Several contact rails extend parallel to one another without electrical interruption along the entire path of motion of the work-piece leading through the lacquer bath and are each connected to the second pole of varying voltage sources. To each work-piece a contact device is assigned which can be brought into communication with a respective one of the several contact rails and in this way applies the potential of the second pole of the corresponding voltage source to the work-piece. In this way, cuts in the contact rails are avoided that would result in wear of the contact devices and in increased control effort.