Original: The first power loom, a mechanized loom powered by a line shaft, was designed in 1784 by Edmund Cartwright and first built in 1785, it was refined over the next 47 years until a design by Kenworthy and Bullough, made the operation completely automatic. This was known as the Lancashire Loom.
Simplified: The first power loom, a mechanized loom powered by a driveshaft, was designed in 1784 by Edmund Cartwright and first built in 1785, later to be perfected by William Horrocks.