Today in Science
Andrew Meikle
Scottish millwright and inventor of the drum threshing machine. His father, James Meikle (1690-1717) produced a winnowing machine (c.1720). He inherited his father's mill, invented the fantail to turn windmills into the wind automatically (1750), a machine for dressing grain (patented 14 Mar 1768) and the spring sail to quickly furl the sails of a windmill to avoid storm damage (1772). His attempts from 1778 to construct a threshing machine were unsuccessful, based on earlier designs by others that rubbed the grain. From about 1784, Meikle instead developed a machine using the idea of a strong revolving drum and fixed beater bars to flail the grain like a flax-scutching machine of his time used to beat the fibres from flax plants. Saving much manual work, the machine separated the grain, from the cobs, stalks or husks and cleaned it. He patented it 9 Apr 1788.
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