Abstract: A damper has a cylinder and a piston, the piston having two or more parts. A first piston part is made of a rubber-elastic material forced against the cylinder wall during a damping stroke. A second piston part is made of a material that is stiffer in comparison to the rubber-elastic material. The second piston part as seen in the radial direction lies between an area of the first piston part and the cylinder wall. The first piston part may have at least two sections of different hardnesses over its lengths. The piston could also include a piston part that is radially forced outwards to rub against the cylinder wall during damping, the piston part being made as a solid body of a material with rubber-elastic properties which becomes flattened under pressure, deforming in such a way that a friction seal is created between the piston part and the cylinder wall.

Abstract: A multi-phase transverse flux machine includes a primary component having individual bundles of lamination elements which are spaced at a mutual separation distance in a direction defined as the longitudinal direction of the transverse flux machine. Each such bundle of lamination elements has leg members extending in a direction transverse to the longitudinal direction of the machine. The leg members are spaced at a mutual separation distance and are arranged in respective rows. The rows extend in the longitudinal direction. Each such row of leg members is excited by a respective exciting winding excited in such a way that the flux in the transverse direction at the various leg members reaches a maximum in a sequence. A secondary component includes rows of permanent magnet elements extending in the longitudinal direction of the machine.

Abstract: A stator for use in induction motors has a laminated core at least one side of which is provided with recesses of constant width for reception of the wires of stator coils. The partitions between the recesses have sockets for the plugs of separately produced inserts which have lateral extensions partially overlying the neighboring recesses to retain the wires in the innermost portions of such recesses. The plugs and the partitions have complementary detents which secure the inserts to the respective partitions. The partitions undergo elastic deformation during introduction of plugs into the respective sockets.

Abstract: The core of the secondary for use in a linear or other induction motor is a ladder-like stamping with two spaced apart rails and a number of bars extending between and having end portions of one piece with the rails. The bars of the cage can be inserted into the recesses of a core, and such recesses can be provided in one side or in two opposite sides of the core. Each recess can receive a single bar or the bars of two or more discrete cores. The bars can be confined in their recesses by slidable closures or by plugs of a hardened adhesive, a synthetic resin or an impregnating agent.

Abstract: An inductively operated heating apparatus for plastic materials in extruders or like machines has a steel housing with one or more passages for the material to be heated and two groups of laminated E-shaped iron cores which are magnetically coupled to the housing to establish a magnetic field. The legs of the cores extend toward the housing and the apparatus further comprises insulators which are interposed between the housing and several legs of each core. Each group of cores is assembled with a substantially V-shaped clamping device into a module, and the two modules are held together by coupling means which cause the resilient clamping devices to store energy and to bias the legs of the cores in the respective groups against the adjacent insulators which bear against the housing. The two clamping devices and the two groups of cores are mirror images of each other.

Abstract: An inductively operated apparatus for heating plastic materials in extruders or for other purposes has a heat-transmitting housing with one or more passages for the material or materials to be heated, and an arrangement for heating the housing. The heating arrangement employs a laminated core with two legs which are magnetically coupled to the housing with the interposition of distancing elements of heat insulating material. The core is surrounded by an exciting coil. In order to prevent overheating of the coil, the heating arrangement further comprises at least one barrier which is interposed between the core and the core and is cooled by one or more streams of a gaseous or liquid coolant, such as water. The barrier can be constituted by a flat tube which is convoluted around the core and supports the coil. A second barrier can be placed around the coil so that the latter is received between two barriers.

Abstract: An inexpensive lamination for use in transformers and/or other static or dynamic electric machines has a metallic layer one side of which is provided with a coat of hardenable adhesive and the other side of which is provided with a coat of insulating material. At least the adhesive coat can contain particles of sand, glass, a metallic oxide or a synthetic plastic material; such particles act as distancing elements between the respective side of the metallic layer and an adjacent metallic layer. The two coats are applied simultaneously between an unwinding station for a web or strip of coherent metallic layers and a winding station for the freshly coated web or strip of coherent metallic layers.

Abstract: Laminated iron core for transformers, choke coils and the like includes a plurality of core parts overlying one another at respective mutually opposing abutment locations, the respective mutually opposing abutment locations defining a space of varying width between one another, the core parts being disposed so as to form a relatively short closed inner path and increasingly longer closed outer paths for magnetic force lines, the space having a region of relatively greater width across which the relatively short closed inner path extends.

Abstract: Electric machine, such as a transformer, a choke or a constant-voltage regulator, having an iron core assemblable from a plurality of individual, substantially rectangular core parts, including legs and intermediate yoke parts, formed of mutually held-together laminate layers, and clamping means such as clamping straps or plates clampable into engagement with a corresponding clamping surface at outer contours of the leg core parts transversely to the laminate layers by clamping elements such as screws or rivets, includes means defining channel or tunnel-shaped recesses extending parallel to all of the mutually parallel laminate layers of all of the assemblable individual core parts and substantially perpendicularly to juxtaposed joint abutments of the respective individual core parts.

Abstract: A stepped iron core formed of sheetmetal laminations for a static or dynamic electric machine, such as a transformer, having yokes and legs and intermediate parts of at least one thereof including stacks of the sheetmetal laminations mutually held together forming individual steps of the yokes and the legs, the yoke stacks and the leg stacks being joinable with one another at respective abutment joint locations formed thereon, and means located at the respective abutment joint locations for achieving a varying magnetic reluctance therebetween so that a longer path of lines of force passes through the respective abutment joint locations in the region thereof of lower magnetic reluctance.

Abstract: A pull-out guide for drawers where each carrier rail consists of two parts, i.e. a fastening member and a runner member. Rollers are held in roller cages which run in the drawer rails. The runner members can be assembled with the fastening members without tools.

Abstract: Iron core for an electric machine such as a transformer, a choke, a voltage stabilizer and the like, assemblable of a plurality of individual parallelepipedal core parts formed of laminated layers mutually held together, the core parts having mutually abutting joints formed with smoothly finished surfaces free of any metallic connection between the individual layers, includes clamping means applicable to a clamping surface at outer contours of the core and extending transversely to the laminated layers, clamping elements for clamping the clamping means so as to hold the individual core parts together, the clamping means includes strap-like members for distributing clamping force at least approximately uniformly to the individual laminated layers between the clamping means and the respective clamping surface.