Science Fair Project Encyclopedia
Joseph Day (born 1855 in London, died 1946) trained as an engineer at the School of Practical Engineering at Crystal Palace in London, began work at Stothert & Pitt in Bath, and in 1889 designed the two-stroke engine as it is widely-known today (in contrast to the two-stroke engine designed by Dugald Clark), the Valve-less Two-Stroke Engine. In the United States it was patented in 1894.
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