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Designed Gray’s expansion motion, which was fitted to the Vulcan (meaning Fenton, Murray and Jackson: Vulcan?)
1840 Designed engines for the Hull and Selby
From 1846 onwards there was a great development of John Gray's mixed framed engine, with inside bearings only for the driving axle and outside bearings for the leading and trailing axles.
Gray, engineer of the London and Brighton Railway, was responsible for some very successful engines; he designed twelve express engines for the company that were built in 1846-8 by Timothy Hackworth at Shildon.
1857 Wrote to The Engineer from Freeman's Journal Office, Dublin.