story of the circular saw
Sarah "Tabitha" Babbitt was an early American Shaker.
Babbitt noticed how inefficient the whipsaw was with half the motion of the two men being lost.
Babbitt realised a round blade would be more efficient.
Babbitt is credited with inventing the first circular sawmill, which was powered by water in 1813.
She did not patient the idea of the circular saw so other people could use and improve the idea.
Three years later two french men patented the circular saw in the USA after discovering it in Shaker papers.
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