Description: Patent for a new and improved wrench. This design consists in "a wrench-head having a handle and a longitudinal slot through the wrench-head, a slidable bar having a jaw moving in said slot, a rack upon said bar, a worm-wheel in the wrench-head, meshing with the rack, and a jaw upon the wrench-head, jointly with a screw-driver inserted in the end of the slidable bar, said wrench-head having a plane outer surrounding surface in proximity to the longitudinal slot" (lines 1-10).
Date: August 23, 1892
Creator: Hoval, John
Item Type: Refine your search to only Patent
Partner: UNT Libraries Government Documents Department