Lever Lever A lever ( or ) is a simple machine consisting of a beam or rigid rod pivoted at a fixed hinge, or fulcrum. A lever is a rigid body capable of rotating on a point on itself. On the basis of the location of fulcrum, load and effort, the lever is divided into three types. It is one of the six simple machines identified by Renaissance scientists. A lever amplifies an input force to provide a greater output force, which is said to provide leverage. The ratio of the output force to the input force is the mechanical advantage
Darcy Lever constructed with a timber frame with plaster fill and a grey slate roof in the Tudor style. It was located on the high ground that slopes down to Blackshaw Brook, which flowed past the south side of the house near the junction with the River Croal. The hall was demolished in 1951. The growth of the textile industry around Darcy Lever was assisted by the availability of coal. By 1896 John Fletcher owned coal mines at Ladyshore, Little Lever; The Earl of Bradford had a coal mine at Great Lever and the Darcy Lever Coal Company and others had mines