james watt 19 January 1736 25 August 1819 Scottish inventor mechanical engineer steam engine Industrial Revolution


James Watt (19 January 1736 – 25 August 1819) was a Scottish inventor and mechanical engineer whose improvements to the steam engine were fundamental to the changes brought by the Industrial Revolution in both the Kingdom of Great Britain and the world. Watt was an enthusiastic inventor, with a fertile imagination that sometimes got in the way of finishing his works, because he could always see "just one more improvement". He was skilled with his hands, and was also able to perform systematic scientific measurements that could quantify the improvements he made and produce a greater understanding of the phenomenon he was working with. Watt was a gentleman, greatly respected by other prominent men of the Industrial Revolution. He was an important member of the Lunar Society, and was a much sought after conversationalist and companion, always interested in expanding his horizons. He was a rather poor businessman, and especially hated bargaining and negotiating terms with those who sought to utilize the steam engine. Until he retired, he was always much concerned about his financial affairs, and was something of a worrier. His personal relationships with his friends and partners were always congenial and long-lasting. As with many major inventions, there is some dispute as to whether Watt was the original sole inventor of some of the numerous inventions he patented. There is no dispute, however, that he was the sole inventor of his most important invention, the separate condenser. It was his practice (from around the 1780s) to pre-empt others' ideas which were known to him by filing patents with the intention of securing credit for the invention for himself, and ensuring that no one else was able to practice it. As he states in a letter to Boulton of 17 August 1784:


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