direction of transport of the shuttles in accordance with fig3 the shuttle magnets 3 are so arranged that in the rotated position of the horseshoe magnets 41 41 39 transverse to the path of conveyance of the shuttles they are aligned with the one pole of the horseshoe magnets as shown in fig4 the pitch of the shuttle magnets 3 whose cross section is the same size as that of the poles of the horseshoe magnets 41 41 39 corresponds to the center to center distance of the horseshoe magnets less the normal distance between the axis of the horseshoe magnets and the axis of one of their legs see fig4 and 5a through 5d in fig5 a through 5d the manner of operation of the shuttle transport is shown schematically for four consecutive positions of rotation of the horseshoe magnets each rotated 90 u00b0 in respect to each other in the figures the horseshoe magnets 41 of the upper drive group are shown in each case these horseshoe magnets act in accordance with fig3 and 4 in each case on the north pole of the shuttle magnets 3 the horsehoe magnets 41 39 of the lower drive group coincide with those of the upper drive group and act in each case on the south.