Original sentence: Back into civilian life, in 1819, he became general manager of the fire insurance company "Phoenix".Charles Xavier Thomas de Colmar (1785–1870) was a French inventor and mathematician.He is known for designing and patenting one of the first calculators called the Arithmometer.He joined the French army in 1809 eventually reaching the level of General Manager of the supply store of all of the armies located in Spain in 1913.His biography.Initially Thomas spent all of his time and energy on his insurance business, therefore there is a hiatus of more than twenty years in between the first model of the Arithmometer introduced in 1820 and its true commercialization in 1844
Edited sentence: After a short employment in the French administration, he joined the French army in 1809 eventually reaching the level of General Manager of the supply store of all of the armies located in Spain in 1913.Another biography in French.At that time it was the biggest insurance company in France and he owned 81% of it.Back into civilian life, in 1819, he co-founded the fire insurance company "Phoenix" which he left quickly because of the lack of support for his new ideas from his partners and shareholders.Charles Xavier Thomas de Colmar (1785–1870) was a French inventor and entrepreneur best known for designing and patenting one of the first mechanical calculators called the Arithmometer.He also played a key role in the development of the mutual insurance industry in France, founding the insurance company "Le Soleil" which became the number one insurance company in France during the Second French Empire.His biography on Arithmometre.Initially Thomas spent all of his time and energy on his insurance business, therefore there is a hiatus of more than thirty years in between the first model of the Arithmometer introduced in 1820 and its true commercialization in 1851.It was nationalized in 1946 and finally merged with "La National" in 1968 to become the GAN company which is still in business today