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Chainsaw engines are traditionally either a two-stroke single-cylinder gasoline (petrol) internal combustion engine (usually with a cylinder volume of 30 to 120 cm 3) or an electric motor driven by a battery or electric power cord. In a petrol chainsaw, fuel is generally supplied to the engine by a carburetor at the intake.
The following year, Stihl created the first ever chainsaw that could be operated by only one person. [7] The company continued to grow and in 1931 it became the first European company to export chainsaws to the United States and the Soviet Union. [8] Stihl has been the biggest chainsaw manufacturing company in the world since 1971. [2]
Joseph Buford Cox (1905 – August 10, 2002), [1] was an American inventor and businessman. He invented what is now known as the chipper type chain for chain saws.He based his design on the C-shaped jaws of the larva of the timberman beetle. [2]
Scott Hassan and Alan Steremberg were cited by Page and Brin as being critical to the development of Google. Rajeev Motwani and Terry Winograd later co-authored with Page and Brin the first paper about the project, describing PageRank and the initial prototype of the Google search engine, published in 1998. Héctor García-Molina and Jeff Ullman were also cited as contributors to the project ...
Current practice guidelines in Canada recommend symphysiotomy for trapped head during vaginal delivery of a breech birth. A 2016 meta-analysis found that in low and middle income countries, there was no difference between maternal and perinatal mortality following either symphysiotomy or C-section. [ 9 ]
Babbitt is credited with inventing the first circular saw for use in a saw mill in 1813. According to the Shakers, Babbitt was watching men use the difficult two-man whipsaw when she noticed that half of their motion was wasted. [1] She proposed creating a round blade to increase efficiency.
Some examples include the chainsaw bayonets in the Gears of War series, the "Ripper" chainsaw-knife of the Fallout series, and the "chainswords" seen in games based on the Warhammer 40,000 franchise. Chainsaw-based weaponry can be seen in the popular Facebook game Battle Stations, where it exists as a large-scale, ship-mounted melee weapon.
By 1871, Disston's saw mill had outgrown its factory and he moved the business to the outlying neighborhood of Tacony, in what is now Northeast Philadelphia.At the time, Tacony was a small outlying area of Philadelphia, but it was located near the railroad and the Delaware River, and provided Disston with room for his saw mill to grow. [1]