Marshall Valve Gear (Marshall, Sons
Marshall valve gear may refer to: * Marshall valve gear, a modified Hackworth valve gear, patented in 1879 by Marshall, Sons & Co. * J. T. Marshall valve gear, any of several valve gears invented by James Thompson Marshall James Thompson Marshall (1854, Glanford Brigg, Lincolnshire - 1931, Knaresborough, Yorkshire) was an English railway and mechanical engineer known for inventing the 'Marshall valve gear' for steam locomotive use. James Marshall began his enginee ... See also * Valve gear {{disambig ...
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James Thompson Marshall
James Thompson Marshall (1854, Glanford Brigg, Lincolnshire - 1931, Knaresborough, Yorkshire) was an English railway and mechanical engineer known for inventing the 'Marshall valve gear' for steam locomotive use. James Marshall began his engineering career at the Leeds-based Steam Plough Company, and later moved to the city's Boyne Engine Works. Marshall valve gear J. T. Marshall invented and patented several different valve gears but these should not be confused with the "Marshall valve gear" patented by Marshall, Sons & Co. in 1879. At least one of J. T. Marshall's valve gears was a rotary type and the only known application was to the Austrian BBÖ Class 114 locomotive. The better-known J. T. Marshall gear was a modified Walschaerts valve gear which was first applied to a Great Northern Railway mineral locomotive, no. 743, in 1901 and received a glowing report. Next, it was tried on GNR Class C2 No. 1520 in March 1903. There was no external change visible on the locomoti ...
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