FIELD: exciting seismic vibration.
SUBSTANCE: source of seismic vibration has rigid base made of an emitter of seismic waves. The base is provided with vertical pillars. The base bears on a weight for permitting movement with respect to the pillars. The weight is provided with the electromagnet inductor. The grooves provided in the magnetic circuit of the inductor receives the exciting winding. The winding is connected to the power source. The anchor of the electromagnet is spaced from the inductor. The anchor is spaced from the pillars. The space receives the flexible member for its pressing when the anchor moves in the direction of decreasing of the space.
EFFECT: enhanced efficiency.
2 cl, 6 dwg
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