Compound lever sudden movement of the key. The earliest remaining writings regarding levers date from the 3rd century BC and were provided by Archimedes. ""Give me a place to stand, and I shall move the earth with a lever"" is a remark attributed to Archimedes, who formally stated the correct mathematical principle of levers (quoted by Pappus of Alexandria). The idea of the compound lever is attributed to the Birmingham inventor John Wyatt in 1743, when he designed a weighing machine that used four compound levers to transfer a load from a weighing platform to a central lever from which the weight
Harry Lever Harry Lever Harold Lever (5 January 1886 – 19 July 1970) was an Australian rules footballer who played with St Kilda in the Victorian Football League (VFL). Lever played as a fullback in his 15-year VFL career which began in 1905. In 1907 he lost two fingers in a band saw accident but after attending to the wound himself, played for St Kilda the following afternoon. He did not play in 1916 or 1917 as St Kilda were in recess due to World War I, while he was injured in 1920 and missed the season. His total of 218 games