Abstract: A fixture for multi-pole magnetization of a magnetizable part has two carrier plates, each having a serpentine channel therein, with an electrical conductor contained in each channel. The electrical conductors each have a thin portion having a cross section which is less than the cross section of the remainder of the conductor. The thin portions of the conductors are mounted so as to be movable in the channels. A part to be magnetized is arranged between the thin portions of the conductors, and the conductors are supplied with a current surge. As a result of the flexibility, and the movable mounting, of the conductor portions, they are caused by the power surge to move against the magnetizable part, thereby creating differently magnetized, adjacent regions in the part, having a boundary therebetween coinciding with the location of the thin portions. A magnet is thereby achieved which is substantially the same as joined individual magnets of opposite polarity.

Abstract: A method for winding a soft-magnetic ribbon to form a self-contained magnetic core using a winding arbor includes the step of, after the ribbon has been wound on the arbor, holding the free end of the ribbon to the preceding turn by spot welds, disposed in general alignment along a center of the ribbon. The free end of the ribbon may be tapered, so that projecting corners are avoided. By making the spot welds substantially in the center of the ribbon, the formation of eddy currents, which may occur if the spot weld accidentally connected two adjacent turns of the ribbon, are avoided. A similar method may be used to releasably attach the beginning of the ribbon to the arbor, with the spot welds then being broken when the core is removed from the arbor. The method is particularly suited for winding a ribbon consisting of amorphous soft-magnetic material.

Abstract: A deactivatable security label comprising a low-coercivity strip and a strip having a high coercive field strength can be advantageously manufactured when the alloy of cobalt, nickle and/or iron is employed which exhibits a coercive field strength of between 20 and 50 A/cm given a remanence of more than one Tesla and when this strip is secured to a low-coercivity strip of amorphous material by means of spot welding.