Grace's Guide is the leading source of historical information on industry and manufacturing in Britain. This web publication contains 140,488 pages of information and 227,382 images on early companies, their products and the people who designed and built them.
of Rose Mount Iron Works, Elland, Yorkshire. London Office: 16 Queen Anne's Gate, Westminster, SW1. Telephone: Elland 261; London Office: Whitehall 2661. Telegraphic Address: "Dempster, Elland"; London Office: "Ellandors, Pearl, London". (1937)
1855 Company founded by Robert Dempster
Engineers, designers and builders of spirally-guided gasholders, gas retorts, storage tanks, and bulk materials handling plant for the power generation, mining, and quarrying industries.
1892 Private company.
1922 Patent - Improvements relating to wheels.
1923 Patent - Apparatus for discharging and charging retorts or ovens.
1926 Received an order from the County of London Electric Supply Corporation for the coal-handling plant, comprising two 100 tons per hour gravity bucket conveyors and a 25-ton per hour telpher plant over storage bunkers, for the extensions of the electric super power station at Barking.
1937 Listed Exhibitor - British Industries Fair. Waterless (M.A.N. Type) Gasholder. (Stand No. Ca.503). 
1961 Manufacturers of gasholders and tanks, gas plant and mechanical handling equipment. 450 employees. 
1963 The company became Oxley Dempster.
1971 The firm closed down.