| 摘要 |
<p>A device is provided to propel workstock to saw blades or other power tools and especially circular saws. The propulsion is effected by a friction drive preferably in the form of a pair of parallel belts engaging a surface of the workstock. The device is mounted for ready vertical adjustment at the will of the operator via a parallel linkage system which is held in any selected position by a gas spring that also provides a resilient bias to produce the necessary pressure for the friction drive. The device is additionally arranged for lateral adjustment.</p> |
