Great video and invention. I think there’s an important difference between a conventional screw auger in a tube and the Olds elevator - not just a difference in “point of view”.  In the conventional auger, the screw thread moves w.r.t. the material (and would do so, and elevate some material, even without the tube). In the Olds elevator, the screw thread is naturally stationary w.r.t. the material and relative movement only occurs because the tube drags some material along as it rotates.<br><br>Note that there are screw augers where the tube rotates at the same speed as the screw (discussed in the background of the patent). There is no relative rotation between screw and tube in these - this shows that it is the relative rotation of the screw and the material that causes elevation.  <br><br>TLDR: Olds elevator is not equivalent to screw auger; relative rotation of screw and tube is red herring; Olds elevator works because tube drives material around screw so material follows thread upwards