Daniel Chapman Stillson the J. J. Walworth Company in the Cambridgeport section of Cambridge, Massachusetts. While at the J. J. Walworth Company, he developed his pipe wrench. On September 13, 1870, he was issued his patent. Stillson was paid about $80,000 in royalties during his lifetime. He died on August 23, 1899, and is buried at Mount Auburn Cemetery in Cambridge and Watertown, Massachusetts. Daniel Chapman Stillson Daniel Chapman Stillson (March 25, 1826 - August 23, 1899) was an American inventor. He invented the modern adjustable pipe wrench. He was born March 25, 1826 in Durham, New Hampshire. He was the son of
Tool use by animals cars to crack them open. Several species of fish use tools to crack open shellfish, extract food that is out of reach, cleaning an area (for nesting), and hunting. Octopuses gather coconut shells and create a shelter. They may also construct a fence using rocks. The key to identifying tool use is defining what constitutes a tool. Researchers of animal behavior have arrived at different formulations. In 1981, Beck published a widely used definition of tool use. This has been modified to: Other, briefer definitions have been proposed: Others, for example Lawick-Goodall, distinguish between "tool use" and "object use". Different