or indirectly each to one of or to a single shared movable part of the straight guide such as for example to movable sliding blocks or to sliding key connections that are adapted to the size of the profile of the stationary guide in other words the movable parts of the guide and the sliding key connection and the stationary part of the guide are connected in a positive fashion to form a sliding fit in a further embodiment of the present invention at least one of the two individual support elements 24 26 22 19 23 27 37 34 31 36 38 39 is mounted either directly or indirectly on a movable part 43 of a two component bearing 43 46 the movable part 43 of the two component bearing 43 46 is rotatably mounted on a supporting part 46 of the bearing 43 46 in this embodiment a longitudinal axis of the supporting part 46 is forced into an orientation in and opposite to the provided operational main magnetic field direction mh or in a horizontal direction parallel to the former the supporting part 46 may be supported either directly or indirectly on the base plate 1 its vertical distance from the base plate 1 is also adjustable distances of the housings 18 17 from one another as viewed crosswise to the provided operational main magnetic field direction mh is also variable for example by displacing the sliding blocks or feet with the individual support elements that are connected to them in a positive or adhesive fashion the position of each housing 18 17.