Invention and Engineering

J. George Leyner

J. George Leyner (1860–1920) was a machinist who invented mining equipment that enhanced safe mining operations while also improving efficiency. He held a significant number of United States patents and established his own equipment manufacturing companies. In particular, he invented a drill that used water to suppress generation of airborne particles during mining, thereby reducing the risk of miners' developing silicosis. The device later became known as the Leyner drill.

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See also

• ▸French artillery during World War I
• ▸Canadian Space Agency
• ▸4-10-2

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