Spinning mule Rhode Island. Development over the next century and a half led to an automatic mule and to finer and stronger yarn. The ring frame, originating in New England in the 1820s, was little used in Lancashire until the 1890s. It required more energy and could not produce the finest counts. Samuel Crompton invented the spinning mule in 1779, so called because it is a hybrid of Arkwright's water frame and James Hargreaves' spinning jenny in the same way that mule is the product of crossbreeding a female horse with a male donkey (a female donkey is called a "jenny"). The
John Kay (spinning frame) collaborated in investigations of machinery for the manufacture of textiles, including the spinning of thread by means of rollers. By 1763 weaving was already automated, but spinning was still done by hand. Lewis Paul had made a machine using mechanical rollers in 1738, but this had not not been a commercial success. In 1767, Kay began a working relationship with Richard Arkwright, a wig-maker and entrepreneur. The character of this relationship, and in particular, the competing claims of Arkwright, Kay, and also Highs to primacy as inventors, were subsequently to become the subjects of bitter legal dispute (see below). Arkwright