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
Firearm (tool) trigger must be pulled only after full compression or the tool will not work (no "bump-firing" allowed). The tool must pass drop tests in all directions to prove that it will not fire even if dropped on the muzzle or knocked against a hard surface. With the coming into effect of the EC Machinery Directive (2006/42/EC), powder actuated tools are distinguished from weapons and are now considered "impact machinery", provided they are "designed for industrial or technical purposes only". After the testing and approval defined by the Machinery Directive for tools of this type, PAT must carry the CE mark