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 a newsagent, a general store and four public houses, the Lever Bridge Inn, the Volunteer (formerly the Artillery & Volunteer), the Farmer's Arms and the Lever's Arms. The village also features two cricket pitches and borders both Moses Gate Country Park and Leverhulme Park. Darcy Lever also has the steepest public highway in Bolton, Gorses Steps. Through the village and park run the remains of the Manchester Bolton and Bury Canal and the Bolton-Bury/Radcliffe railway line, which had a station which was open between 1848 and 1951. The history and development of Darcy Lever as with its neighbour Little Lever