Family tree of Marc SEGUIN

Architect & Designer

FrenchBorn Marc SEGUIN

French engineer, inventor of the wire-cable suspension bridge

Born on April 20, 1786 in Annonay, Ardèche , France

Died on February 24, 1875 in Annonay, Ardèche , France

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Born to Marc François Seguin, founder of Seguin & Co. and Thérèse-Augustine de Montgolfier niece of Joseph Montgolfier, Marc Seguin was an inventor and entrepreneur. He developed the first suspension bridge in continental Europe, building and administering toll-bridges for a total of 186 bridges throughout France.

Shortly after the Stockton and Darlington Railway in England opened (1825) he visited it and observed George Stephenson's Locomotion in operation. In 1829, he delivered two steam locomotives of his own design to the Lyons & St Etienne railway. These used an innovative multi-tube boiler and also prominent mechanically driven fans to provide draught on the fire, rather than the blastpipe that was coming into common service at this period. This boiler resembled the later Scotch marine boiler in some aspects, in that the boiler had a large single flue from the furnace, then many small-diameter firetubes returning to a chimney above the firebox door. Uniquely, Seguin's design also arranged the furnace in a large square water-jacketed firebox beneath the boiler to provide a large grate area and greater heating capacity. Robert Stephenson had also made the same decision with his Rocket, but placed his firebox separately and behind the main boiler shell. Seguin's boiler enabled steam-engine trains to increase power and velocity from 4 miles per hour to 25 miles per hour making railroad a more viable mode of transportation. Later he would collaborate with George Stephenson to help him win the speed contest at Rainhill Trials, where Stephenson's Rocket won using the fire-tube boiler.


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Geographical origins

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