Born March 3 1818 – Died July 24 1894
Improvement in Rock-Drills
Patent No. 112,254
Simon Ingersoll's practical powered drill played an important role in construction and excavation for more than a century. Percussion drills derived from Ingersoll's design have been used in excavation, mining, tunneling, and highway construction.
By 1870, Ingersoll had invented a drill that replaced hand drilling,
making mining and tunneling much faster and cheaper. Before Ingersoll’s
drills, underground drilling was done by striking a length of steel rod
repeatedly with a sledgehammer. Ingersoll's drill surpassed earlier drills
because it rotated the drill after each strike, automatically advancing the
steel. Ingersoll's design also featured an innovative tripod, and was
significantly lighter than other drills. His first design
Born in Stanwich, Connecticut, Ingersoll received an informal grade school education. He received his first patent in 1858 for a steam engine shaft. He developed other inventions over the next ten years, including a scale, a friction clutch, and a latch for gates.