Thursday, September 08, 2011
Tabitha Babbitt got the inspiration for an invention in 1810, at the age of 26, while sitting at her spinning wheel. Watching a work crew saw wood with a two-man saw, she noticed that half the back-and-forth motion was wasted (the back portion), and envisioned a circular blade. By notching the edge of a thin metal disk and then attaching it to her spinning wheel, she effortlessly cut through a piece of shingle, and the circular saw was born. But because of her religious beliefs (she was a Shaker), Babbitt never pursued a patent.