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Sir John Brown, (born Dec. 6, 1816, Sheffield, Yorkshire [now South Yorkshire], Eng.—died Dec. 27, 1896, Bromley, Kent [now Greater London]), British armour-plate manufacturer who developed rolled-steel plates for naval warships.
Brown began as an apprentice to a cutlery firm. In 1848 he invented the conical steel spring buffer for railway cars. In 1856 he established the Atlas ironworks in Sheffield, which produced ordnance forgings, railway bars, steel springs, and axles. Besides supplying iron to the Sheffield steel trade, Brown himself made improvements on the Bessemer process.
http://www.britannica.com/EBchecked/topic/81564/Sir-John-Brown
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Sir John Brown