henry bamford rapid grinding mill Introduction. Henry Bamford and Sons - Graces Guide. By 1891, it became necessary to obtain more factory space due to the increased demand for Bamford products. 1893 The Leighton Ironworks now covered an area of 10 acres and employed 400 people. 1894 Catalogue of Bamford's 'rapid' Grinding and Crushing Mills and Split Pulley.