re-organised to include a sales department responsible for advertising, supervised by Madden who in succession was appointed Managing Director in 1922, serving until 1963. Trained at Faraday House Engineering College, from outside the Hargreaves family circle and established conventions of the industrial regions, Madden ensured the business was run economically during the difficult times ahead. The readiness to adapt was crucial to success during the interwar period; he realised that marketing the firm's specialities was as important to the design and manufacture of its products. As the steam turbine replaced reciprocating steam engines, the company required a skilled engineer to produce a design of its own; in 1923 former principle assistant to the Chief Turbine Designer of English Electric, George Arrowsmith was appointed as Hick Hargreaves' Chief Turbine Designer; development continued and by 1927 the firm's engine work was principally steam turbines for electricity generating stations, becoming a major supplier to the CEB. Three of the nine turbines produced were supplied to Fraser & Chalmers for installation at Ham Halls power station. Arrowsmith was appointed Chief Engineer and a director of Hick Hargreaves in 1928. A 1923 Hick Hargreaves Co. Ltd. condenser, coupled to an English Electric Company turbogenerator built by Dick, Kerr & Co., set No. 6 in operation at the Back o' th' Bank power station, Bolton until 1979, is displayed at the Museum of Science and Industry, Manchester. During the 1930s, the company acquired the records, drawings and patterns of four defunct steam engine manufacturers: J & E Wood, John Musgrave & Sons Limited, Galloways Limited and Scott & Hodgson Limited. As a consequence it made a lucrative business out of repairs and the supply of spare parts during the Great Depression. Large stationary steam engines were still used for the many cotton mills in the Bolton area until the collapse of the industry after World War II. 3 and 4-cylinder triple expansion marine steam engines were built during the 1940s, post-war the company expanded its work in electricity generation, again becoming a major supplier to the CEB and branched out into food processing, oil refining and offshore oil equipment production, continuing to supply vacuum equipment to the chemical and petrochemical industries. Between 1946 and 1947 it supplied vacuum pumps to Vickers Armstrongs for the Barnes Wallis designed Stratosphere Chamber at Brooklands, built to investigate high-speed flight at very high altitudes. By the early 1960's Hick Hargreaves