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 Darcy Lever Darcy Lever is an area of the Metropolitan Borough of Bolton in Greater Manchester, England. Historically part of Lancashire, the area lies on the B6209 (Radcliffe Road), between Bolton and Little Lever. Its history dates to the time of William the Conqueror when it was part of the Salford Hundred given to Roger of Poitou for his participation in the Norman conquest of England. Lever was recorded as Parua Lefre in 1212, from the Latin, parva meaning little and laefre, which is derived from the Old English meaning 'place where the rushes grow'. The name was recorded in