Abstract: An oscillation generator for seismic applications includes a housing in which two coils are housed, both coils being acted upon with alternating current or electrical impulse and permanent magnets, and which is coupled via a coupling element to the object to be examined. The coils of the oscillation generator are each borne on a center leg of a packet of sheets cut in an E-shape, the free legs of the sheets associated with respective ones of the coils pointing away from one another. The coils are coupled to a block that can be linearly displaced in the housing. Securely attached to the side walls of the housing on a non-magnetic plate are permanent magnets that are disposed in the extension of the free end of the legs of the sheets, and the polarity of the exterior permanent magnets is reversed relative to the center permanent magnet.

Abstract: An oscillation generator for seismic applications includes a housing in which two coils are housed, both coils being acted upon with alternating current or electrical impulse and permanent magnets, and which is coupled via a coupling element to the object to be examined. The coils of the oscillation generator are each borne on a center leg of a packet of sheets cut in an E-shape, the free legs of the sheets associated with respective ones of the coils pointing away from one another. The coils are coupled to a block that can be linearly displaced in the housing. Securely attached to the side walls of the housing on a non-magnetic plate are permanent magnets that are disposed in the extension of the free end of the legs of the sheets, and the polarity of the exterior permanent magnets is reversed relative to the center permanent magnet.

Abstract: The invention relates to the regeneration of solid rail road wheels, the operating safety of which is impaired by the danger of rupture or buckling, by the action of the block brake, especially after the brake has been acting for a long time by influencing the active internal stress state in the wheel rim, in such a fashion that damaging effects are no longer present in the sense of reduced operating safety. This is achieved by heating the wheel center of the solid railroad wheel. The heating process is such that plastic deformation occurs, especially in the area of maximum internal stress and the internal stresses in the solid wheel can thereby be relieved. The temperature difference required for this, between the heated area of the wheel center and the wheel rim is at least 100 deg C.