Patent attributes
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.
