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
Jig (tool) Jig (tool) A jig is a type of custom-made tool used to control the location and/or motion of parts or other tools. A jig's primary purpose is to provide repeatability, accuracy, and interchangeability in the manufacturing of products. A jig is often confused with a fixture; a fixture holds the work in a fixed location. A device that does both functions (holding the work and guiding a tool) is called a jig. An example of a jig is when a key is duplicated; the original is used as a jig so the new key can have the same path as