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Ruston, Proctor and Company was established in Lincoln, England in 1857, and were manufacturers of steam tractors and engines. They later became Rustons and then Ruston & Hornsby. ==History== The firm was started as millwrights and implement manufacturers 'Burton & Proctor' by James Toyne Proctor and Theophilus Burton in Lincoln in 1840. Joseph Ruston became a partner in the company in 1857, and the company changed name to Ruston, Proctor & Co. and grew to become a major agricultural engineering firm. In 1918 the firm merged with the established Richard Hornsby & Sons company, from Grantham, Lincolnshire. Rustons were primarily steam engineers, manufacturing portable, stationary and traction engines, boilers, and associated engineering products such as winding gear, shafts and pulleys. Threshing machines, clover hullers, corn mills, maize shellers and pumps for steam power were also made. As well as engines for agriculture machines Rustons made railway locomotives, industrial equipment and mining machinery. The company also expanded into electrical and diesel engineering. The firm were one of the first to manufacture steam-powered excavating machinery – in the 1880s producing the "Dunbar & Ruston's" steam navvy (excavator).〔Lincolns Excavators: The Ruston Years 1875–1930, by Peter Robinson, ISBN 1-871565-42-1〕 These 2 cu yd machines were used in the construction of the Manchester Ship Canal. In 1906 they built the "Ruston Light Steam Shovel", and exhibited it at the Royal Agricultural Show of 1907 held in Lincoln, the machine being of 3/4 cu yd capacity. The firm later became Ruston-Bucyrus. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Ruston, Proctor and Company」の詳細全文を読む スポンサード リンク
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