| 摘要 |
<p>Reciprocal motion machine for diverse uses constituted from an elongate bar that includes a shaft, in the intermediate part thereof, supported on bearings, on which the bar moves, and from a piece or weight that slides from one side to the other of the bar of the rocker assembly, which piece has two springs, one at either end thereof, for abutting alternately at the ends of the bar.</p> |
