Elevator-Wrench
Description:
Patent for an improvement in elevator wrenches. The device is meant to be used with rotary drilling machines for "supporting the drilling the drill pipe and for holding it from rotation during the releasing of the several joins of the pipe when it is necessary to withdraw the drill from the well hole."
Date:
October 13, 1914
Creator:
Lebus, George Franklin
Partner:
UNT Libraries Government Documents Department