Abstract: In a known magnet system, specifically for magnetic separators, having homogeneously magnetized magnet blocks arranged in circular ring shape, the magnet blocks have their magnetization directions aligned differently from one to another and established in accordance with a predetermined mathematical formula. While a magnetic field running almost uniformly over the whole region of the magnet system is thus produced, the magnet blocks are made trapezoidal in cross section and, because of the many distinct magnetization directions, require separate fabrication. Both the fabrication and the assembly of these magnet blocks are therefore relatively complicated and time-consuming. In accordance with the invention, however, the fabrication and the assembly of the magnet blocks into a magnet system are quite substantially simplified and improved by virtue of the fact that the magnet blocks (1) are made square in cross section.

Abstract: A magnetic separator comprising a rotatable drum including an axis of rotation and a periphery comprising a plurality of magnet blocks. The magnet blocks are mounted and arranged as circular rings about the axis of rotation. The ith magnet block is magnetized in a predetermined direction defined by .psi..sub.i =-n.rho..sub.i where n is a positive number and .phi..sub.i is an angle described by a line from the center of gravity of the ith block to the axis of rotation and a predetermine radius vector. The spacing between neighboring centers of gravity of the magnetic blocks, expressed as a sector angle, is smaller than or equal to about .pi./2 (n+1).

Abstract: A magnetic drive system for generating linear movements, such as for driving a printing element in a high speed printer, has a bar-shaped armature with a coil comovable attached thereto, the coil and armature combination being seated in a yoke for longitudinal movement relative thereto. The yoke and armature consist primarily of low magnetic retentive material and at least one permanent magnet is disposed in the magnetic curcuit formed by the yoke and armature such that a magnetic flux is produced in the armature parallel to the longitudinal axis thereof. The coil is connected to a voltage source for operation such that current flow through the coil generates a field in the longitudinal direction of the armature which reinforces the attractive force of the magnetic field at one end of the armature while simultaneously reducing the force at the opposite end to thereby move the armature and coil together.

Abstract: The invention relates to an electrical winding for a transformer, a choke coil or the like, particularly for high frequencies, wherein the conductor forming the winding is radially subdivided into n subconductors and within the winding the subconductors are twisted in such a manner that the initially innermost subconductor, after twisting comes to lie outermost, the subconductor in the second innermost position, after twisting comes to lie at the second outermost position, etc. If the subconductors are designed as conductor tapes, the subconductors 1 through (n-1) comprise two partially overlapping tape sections which in the overlap region are conductively connected together at the side edges of the tape, the n.sup.th conductor tape being made of one piece and forming one of the outwardly disposed subconductors of the conductor.