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
Hardman Lever was knighted as Knight Commander of the Order of the Bath (KCB) in 1917 and created a baronet in the 1920 New Year Honours. He was also awarded the Legion of Honour and the Order of the Crown of Italy. He is buried with his wife, Edythe, in the churchyard of St Mary's, Kings Worthy, Winchester, Hampshire. Hardman Lever Sir Samuel Hardman Lever, 1st Baronet, KCB (18 April 1869 – 1 July 1947), generally known as Sir Hardman Lever, and as "Sammie" to his friends, was an English accountant and civil servant. Lever was born in Bootle, Lancashire, and was