Ralston Thresher
West Middletown, Washington County, Pennsylvania
Marker Inscription
Nearby was the site of the Robert McClure factory of pre-Civil War days. It pioneered in making Andrew Ralston's machine cleaning and threshing grain in a single operation, patented in 1842.
Erected by Pennsylvania Historical and Museum Commission
The Story
In the decades before the Civil War, the rolling farmland of Washington County was a proving ground for the machines that would transform American agriculture. Near this spot stood Robert McClure's factory, where Andrew Ralston's ingenious device — patented in 1842 — cleaned and threshed grain in a single operation, sparing farmers the slow, back-breaking work of flailing and winnowing by hand. It was a small Pennsylvania shop taking part in a national wave of mechanical invention that steadily pulled labor off the threshing floor.
Why it matters
Early farm machinery like the Ralston thresher helped set American agriculture on the path from muscle power to mechanization, freeing hands and multiplying yields across a growing nation.
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Related people
- · Andrew Ralston
- · Robert McClure
Themes & tags
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