Why were chainsaw invented? Chainsaw was first used to cut bones in orthopaedic surgeries in 1830. German orthopedist Bernhard Heine manufactured a tool similar to a chainsaw around 1830. This instrument, the ostetome, had links of a chain that carried small sharp teeth with angled edges; the chain moved around a guide blade turning the handle of a sprocket.
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The origin is still a subject of debate, but german orthopedist Bernhard Heine manufactured a tool similar to a chainsaw around 1830. This instrument, the ostetome, had links of a chain that carried small sharp teeth with angled edges; the chain moved around a guide blade turning the handle of a sprocket. As the name implies, it was used to cut bones.
The prototype of the family chainsaw today in the wood industry was initiated in the late 18th century by two Scottish doctors, John Aitken and James Jeffray, for synchesiotomy and sick bone excision, respectively. The chain saw, a thin chain of jagged links that cuts on the concave side, was invented around 1783-1785. He was illustrated in the Principles of Partery or Posterperal Medicine of Aitken (1785) and used it in his dissection room. Jeffray claimed to have conceived the idea of the chainsaw independently at the time, but it was in 1790 before he could produce it. In 1806, Jeffray published Cases of Conry Joint Removal by H. Park and PF Moreau with observations by Dr. James Jeffray In this communication, he translated Moreau’s article from 1803. Park and Moreau described the successful split of diseased joints, particularly the knee and elbow. . Jeffray explained that the chainsaw would allow for a smaller wound and protect the adjacent neurovascular package. The synphysiotomy had too many complications for most obstetricists, but Jeffray’s ideas were accepted, especially after the development of anesthetics. Mechanized versions of the chainsaw were developed, but in the late 19th century, it was replaced in surgery by the Gigli twisted wire saw. However, for much of the 19th century, the chainsaw was a useful surgical instrument.
To cut wood
The first patent for an “endless chainsaw” practice (a saw comprising a chain of links bearing saw teeth and running in a guidance frame) was awarded to Samuel J. Bens of San Francisco on January 17, 1905, with the intention of falling giant redwoods. The first portable chainsaw was developed and patented in 1918 by Canadian engineer James Shand. After allowing his rights to expire in 1930, his invention was developed and became the German company Festo in 1933. The company now operates as Festool producing portable power tools. Other major contributors to the modern chainsaw include Joseph Buford Cox and Andreas Stihl; the latter patented and developed an electric chainsaw for use in parting sites in 1926 and a petrol chainsaw in 1929, and founded a company to mass-produce them. In 1927, Emil Lerp, the founder of Dolmar, developed the world’s first gasoline chainsaw and manufactured it in series.
World War II halt the supply of German chain saws to North America, so new manufacturers emerged, including Industrial Engineering Ltd (IEL) in 1939, the forerunner of Pioneer Saws. Ltd and part of Outboard Marine Corporation, the oldest chainsaw manufacturer in North America.
McCulloch in North America began producing chainsaws in 1948. The first models were heavy devices for two people with long bars. Often, the chainsaws were so heavy that they had wheels as drag saws. Other equipment used driven lines from a wheeled power unit to propel the cutting bar.
After World War II, improvements in aluminum and engine design lightened the chainsaws to the point where a single person could carry them. In some areas, skidder crews have been replaced by the feller buncher and harvester.
Chainsaws have almost completely replaced simple manual saws in forestry. They come in many sizes, from small electric saws for home and garden use, to large “lumberjack” saws. Members of military engineering units are trained to use chainsaws as well as firefighters to fight wildfires and vent structure fires.
There are three main types of chainsaw sharpeners: hand file, electric chain saw and bar mount.