Losh and Stephenson's carriage. Historical artwork of a steam locomotive patented in 1815 by engineer George Stephenson (1781-1848). This design had connecting rods to drive the wheels and wheels coupled together with a chain. It was the first to have a steam-blast, which creates a draft to keep the fire going in the furnace. Stephenson's locomotives were built at William Losh's ironworks in Newcastle. The pair patented cast iron railroads in 1816, but parted company in 1823 when Stephenson decided that malleable iron railroads were better. Published in History and progress of the steam engine, England, 1830.