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of Sentinel Works, Polmadie, Glasgow and at Worcester
1880 The company moved to the Sentinel Works at Polmadie, Glasgow.
1885 Started production of the Sentinel High Speed Steam Engine used for electricity generation, marine engines and for factory work. They also built boats at their own shipyard.
1889 See 1889 Shipbuilding Statistics for detail of the tonnage produced.
1894 Catalogue of fittings. 
1903 Became public company. The company was registered on 3 June, to acquire the business of a firm of the same name, manufacturers of valves, air compressors, high speed engines, engine fittings, marine auxillary machinery etc. 
1911 Manufacturer of Axle Boxes for the Railways. 
1914 Engineers and shipbuilders (light-draught craft). Specialities: air compressors, steam motor wagons, steering gears and ships' auxiliary machinery, light draught steamers and barges, valves for steam and water and waterworks fittings, high-speed steam engines, ash hoisting engines, capstans, feed water filters and heaters. Employees 900. 
1917 Advert for 'Sentinel' Valves. 
1919 Advert for 'Sentinel' Valves.
1927 Advert for 'Sentinel' Valves (of Sentinel Valve Works, Worcester). 
1937 Engineers and ironfounders. 
1940 Advert for air Compressors (of Sentinel Works, Glasgow S2) and Valves (of Sentinel Valve Works, Worcester). 
1945 Advert for 'Sentinel' air compressors. (of Sentinel Works, Glasgow, S2). 
1945 Advert for 'Sentinel' steam traps and valves. (of Sentinel Valve Works, Worcester). 
1951 Advert for Compressors and vacuum pumps. (of Polmadie, Glasgow). 
1960 Advert for balanced opposed compressors. (of Polmadie). 
1960 Advert for Valves. (of Worcester). 
1960 The compressors business at Polmadie was transferred to G. and J. Weir. Fixed assets at Polmadie were sold to Davy and United Engineering Co who would use this facility to expand their works in the Glasgow area
1961 Engineers, manufacturing air and gas compressors, marine auxiliary, vacuum pumps and steam engines. 400 employees. 
From William S. Murphy
Papers of William Mayberry