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
Don Lever Don Lever Donald Richard "Cleaver" Lever (born November 14, 1952) is a Canadian retired professional ice hockey left winger who played 15 seasons in the National Hockey League from 1972–73 until 1986–87. Lever was drafted 3rd overall by the Vancouver Canucks in the 1972 NHL Amateur Draft. The forward reached the 20-goal mark six times in Vancouver and played for Canada at the 1978 World Championships. Lever was traded to the Atlanta Flames alongside Brad Smith in exchange for Ivan Boldirev and Darcy Rota on February 8, 1980. He was later the first captain of the New Jersey Devils. Lever