Simon Ingersoll (March 3, 1818 – July 24, 1894) was an American inventor who improved the steam-powered percussion rock drill, which replaced hand drilling and was a major advancement in the mining and construction industries. The drill vastly increased efficiency.
Simon Ingersoll (March 3, 1818 – July 24, 1894) was an American inventor who improved the steam-powered percussion rock drill, which replaced hand drilling and was a major advancement in the mining and construction industries. The drill vastly increased efficiency.
Source: Wikipedia "Simon Ingersoll" · CC BY-SA 4.0
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