Abstract: A ball-and-socket coupling for connecting two bodies to one another. The coupling includes a U-shaped welded support frame having a base as well as first and second legs extending from the base. The two legs are spaced from one another and define an open side of the frame opposite the base. The first leg forms a ball-holding pin, while the second leg is adapted to be attached to one of the two bodies. The ball-holding pin traverses and carries a ball of the coupling. A support bracket adapted to be attached to the other of the two bodies carries a socket in which the ball nests. A lid closes off the open side of the frame, and a securing device releasably attaches the lid to the frame.

Abstract: The invention relates to an arrangement for a preassembled structure of disc cell semiconductors that can be pressure-contacted, in which a loose, stacked module comprising disc cell semiconductors, associated terminal tags and end-side cooling cells and insulating cells is held together until final assembly by means of loose fixation via insulating pipes that serve to insulate the studs to be brought in later for pressure-fixation of the module, for which purpose the insulating pipes, each being provided at one end with a flange, engage a common holding plate from behind, and are guided at the other end through a common insulator, via which axial securing of the module is effected through frictional-lockup connection to the insulating pipes by means of a tightening strap.

Abstract: For a squirrel-cage rotor of an electric machine, having a cage that passes through the stack axially and is made of electrically well-conductive short-circuit rods that are connected by short-circuit rings at the ends projecting from the stack, oscillation problems that result during operation with frequency converters are intended to be solved. In addition, higher natural torsion frequencies are intended to be achieved on the rotor, that is, the construction is to be made less sensitive by simple modifications to the squirrel cage in order to prevent the resonance effects. This object is attained in that respectively two, three or more short-circuit rods are guided together to rod assemblies at their ends, and these are connected to the short-circuit rings with material-to-material bonding.