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Thomas Leopold "Carbide" Willson (March 14, 1860 - December 20, 1915) was a Canadian inventor.
He was born on a farm near Princeton, Ontario in 1860 and went to school in Hamilton, Ontario. By the age of 21, he had designed and patented the first electric arc lamps used in Hamilton. He moved to the United States in search of opportunities to sell his ideas.
In 1892, he discovered an economically viable process for creating calcium carbide, which is used in the production of acetylene gas. In 1895, he sold his patent to Union Carbide.
In the same year, he married Mary Parks in California and moved back to Canada. During the years 1900 and 1901, he moved to Ottawa and opened carbide plants in Merritton, Ontario, Shawinigan, Quebec and Ottawa. In 1911, he founded the International Marine Signal Company to manufacture marine buoys and lighthouse beacons.
He built a summer house on Meech Lake in what is now Gatineau Park and began experimenting with the use of nitrogen in the manufacture of fertilizers.
In 1915, he died of a heart attack in New York City while trying to raise funds for a hydroelectric project in Labrador. His dream was finally realized in 1974 as the Churchill Falls project.
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