Chainsaw
A chainsaw is a portable gasoline-, electric-, or battery-powered saw that cuts with a set of teeth attached to a rotating chain driven along a guide bar. It is used in activities such as tree felling, limbing, bucking, pruning, cutting firebreaks in wildland fire suppression, and harvesting of firewood. Three main types of chainsawers are used: handheld, electric chainsaw, and bar-mounted.
About Chainsaw in brief
A chainsaw is a portable gasoline-, electric-, or battery-powered saw that cuts with a set of teeth attached to a rotating chain driven along a guide bar. It is used in activities such as tree felling, limbing, bucking, pruning, cutting firebreaks in wildland fire suppression, and harvesting of firewood. Chainsaws with specially designed bar-and-chain combinations have been developed as tools for use in chainsaw art and chainsaw mills. Specialized chainsaws are used for cutting concrete during construction developments, and ice sculpture and winter swimming in Finland. Three main types of chainsawers are used: handheld, electric chainsaw, and bar-mounted. A chainsaw consists of several parts: internal combustion engines, internal-stroke engines, or two-stroke gasoline engines. The first portable chainsaw was developed and patented in 1918 by Canadian millwright James Shand. World War II interrupted the supply of German chain saws to North America, so new manufacturers sprang up, including Industrial Engineering Ltd in 1939, the forerunner of Pioneer Saws Ltd and part of Outboard Marine Corporation, the oldest manufacturer of chainsaws in North America. The earliest patent for a practical \”endless chain saw\” was granted to Samuel J. Bens of San Francisco on January 17, 1905, his intent being to fell giant redwoods. In some areas, the skidder and harvester have been replaced by the simple man-powered feller saws.
They are made in many sizes, from small electric saws intended for garden use, to large \”lumberjack\” saws, as firefighters to fight forest fires and to ventilate structure fires to fight fires to the large military engineer units of the US Army and the Royal Australian Air Force. The origin of chainsaws in surgery is debated. It was pioneered in the late 18th century by two Scottish doctors, John Aitken and James Jeffray, for symphysiotomy and excision of diseased bone, respectively. Mechanized versions of the chain saw were developed but in the later 19th century, it was superseded in surgery by the Gigli twisted-wire saw. As the name implies, this was used to cut bone. In 1806, Jeffray published \”Cases of the Excision of Carious Joints by H. Park and P. F. Moreau, with Observations by James Jeffrays, M. D. \” In this communication, he translated Moreau’s paper of 1803. After he allowed his rights to lapse in 1930, his invention was further developed by what became the German company Festo in 1933, The company, now operating as Festool, produces portable power tools. Other important contributors to the modern chainsaw are Joseph Buford Cox and Andreas Stihl; the latter patented and developed a gasoline-powered chainsaw in 1929, and founded a company to mass produce them.
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This page is based on the article Chainsaw published in Wikipedia (as of Dec. 07, 2020) and was automatically summarized using artificial intelligence.
