The Antique Wrench Patent Archive

Every grip the nineteenth century took on a nut

Combined clamp and wrench

Patent drawing of a railroad track wrench showing a hooked claw clamping over a rail joint, connected by a long stem with a universal joint to a socket wrench and ratchet handle.IMPROVEMENT IN COMBINED CLAMPS AND WRENCHES.Ephraim Maguire · November 26, 1872