Compound lever the force of pushing back the stick to the levers and they rub against the wheels, using friction to slow and eventually stop the train. These are everyday applications of this mechanism. A piano key is a compound lever of the first-class, since the fulcrum is between the weight to be moved and the power. The purpose of this lever is to translate a small movement (depression of the key) into a larger and fast movement of the hammer on the strings. The quality of the resulting tone depends on whether the final speed is brought about by gradual or
Darcy Lever several ways, whilst the spellings differ the pronunciation was similar to 'lever' – Lethre 1221; Leuere 1278; Leuir 1282; Leuer 1291 and Leyver 1550. Initially, Lever was the name for the hamlets comprising the manor of Lever. In 1509 it became Darcye Lever, the distinguishing affix coming from possession by the D'Arcy family. "NOTE : Until 1509 the area called Darcy Lever today was part of the Manor of Little Lever. In the text, where the name is given in italicised text with square brackets, it refers to the area of Darcy Lever before it gained that name." Darcy Lever