Abstract: A novel mechanical power coupling means employable with a novel material compacting apparatus and utilizing either reciprocal or continuous drive inputs with the coupling means. In the preferred compacting apparatus embodiment a reciprocal drive is used such that the compactor is powered by both reciprocating movements of the input shaft. The compactor may be driven in a variety of speed/torque arrangements using the novel coupling means. The coupling means includes a wrapped spring clutch which automatically engages the highest speed mechanical arrangement capable of overcoming the load on the output shaft.