Great story about 19th Century inventor Margaret Knight from Smithsonian Magazine.
With only rudimentary schooling under her belt, a 12-year-old Knight joined the ranks of a riverside cotton mill in Manchester to support her widowed mother. In an unregulated, dangerous factory setting, the preteen toiled for paltry wages from before dawn until after dusk.
One of the leading causes of grievous injury at the mill, she soon observed, was the propensity of steel-tipped flying shuttles (manipulated by workers to unite the perpendicular weft and warp threads in their weaves) to come free of their looms, shooting off at high velocity with the slightest employee error.
The mechanically minded Knight set out to fix this, and before her thirteenth birthday devised an original shuttle restraint system that would soon sweep the cotton industry. At the time, she had no notion of patenting her idea, but as the years went by and she generated more and more such concepts, Knight came to see the moneymaking potential in her creativity.