The Antique Wrench Patent Archive

Every grip the nineteenth century took on a nut

Monkey wrench alternative

Patent drawing of a curved pipe wrench with a hooked serrated dog pivoting at the jaw end, shown gripping a small pipe in Figure 1 and a large pipe in Figure 2, with a cross-section of the pivot joint in Figure 3.IMPROVEMENT IN PIPE-WRENCHESHenry B. Wheatcroft · December 2, 1873