John Birkinshaw

John Birkinshaw was a 19th-century railway engineer from Bedlington, Northumberland noted for his invention of wrought iron rails in 1820 (patented on October 23, 1820). 
Up to this point, rail systems had used either wooden rails, which were totally incapable of supporting steam engines, or cast iron rails typically only 3 feet in length. These cast iron rails, developed by William Jessop and others, only allowed very low speeds and broke easily and although steam locomotives had been tested as early as 1804 by Richard Trevithick, these experiments had not been economically successful as the rails frequently broke.
"John Birkinshaw's 1820 patent for rolling wrought-iron rails in 15ft lengths was a vital breakthrough for the infant railway system. Wrought iron was able to withstand the moving load of a locomotive and train unlike cast iron, used for rails until then, which was brittle and fractured all too easily." 
Birkinshaw's wrought iron rails were taken up by George Stephenson in 1821 for the proposed Stockton and Darlington Railway, despite the fact that Stephenson already held the rights to the best cast iron product, and it was this railway that effectively launched the rail era.
Career.
(Cross-Rudkin et al., 2008, pp. 94–95) Cross-Rudkin, P. S. M., Chrimes, M. M., Bailey, M. R., Cox, R. C., Hurst, B. L., C., M. R., . . . Swailes, T. (2008). "Biographical Dictionary of Civil Engineers in Great Britain and Ireland, Volume 2: 1830-1890" (Vol. Second). London E14 4JD: Thomas Telford.
Private Life.
Birkinshaw married in 1809. He and his wife Ann Cas had eight children.