William Horrocks, a cotton manufacturer of Stockport built an early power loom in 1803, based on the principles of Cartwright but including some significant improvements to cloth take up and in 1813 battening.
Edmund Cartwright bought and patented a power loom in 1785, and it was this that was adopted by the nascent cotton industry in England. The silk loom made by Jacques Vaucanson in 1745 operated on the same principles but wasn't developed further. The invention of the flying shuttle by John Kay was critical to the development of a commercially successful power loom. Cartwright's loom was impractical but the ideas behind it were developed by numerous inventors in the Manchester area of England.
Cartwright's loom was little used; he established a powerloom factory at Doncaster in 1787 which closed after few years. Grimshaw's factory at Manchester, open in 1790 which contained twenty four Cartwright looms this was burnt down by protesting hand loom weavers. It is speculated that Cartwrights failure was due to it having a wooded frame, being of crude construction, Cartwright's inexperience in business and the lack of an adequate method to prepare the warp.
The warp threads need to be strengthened by appying a wet size (a process called dressing) and then wound onto a beam or roller that fitted on the back of the loom (a process called warping or beaming). These processes were time consuming, if dressing took place on the loom, the loom had to remain idle till the threads dried thus the economics of weaving still favoured the hardloom weaver. It was William Radcliffe, also of Stockport who introduced the dressing frame in 1803.
William Horrocks secured several patents to improve the loom. The Horrocks loom Introduced in 1803, featured an improved method of taking up the cloth onto the beam once it was woven. It had a metal frame, as was described as neat and compact so hundreds could be at work in a single room.  As the warp was now dressed away from the loom, Horrocks loom could be run continuously being stopped only to piece broken threads and to replenish the weft in the shuttle.[a] Two thousand four hundred were in use by 1813, by 1818 there were 32 factories containing 5732 looms. There were 14,150 looms by 1820 but 55,500 by 1829. though these would be outnumbered 4 to 1 by handlooms. Official figures, The Facories Inspectors'count) were first compiled in 1835 and they showed 108,189 power looms used for cotton, 1713 for silk, 2330 for wool and 2846 for worsted but not all of these would have been Horrocks looms, the 1830 Roberts Loom (based on 1822 patents) had become more popular. 
- Baines, E (1835), The History of Cotton Manufacture in Great Britain, London: Fisher, Fisher and Jackson, p. 253
- Guest, Richard (1823). "The Compendious History of Cotton-Manufacture". Retrieved Feb 2009.
- Timmins, Geoffrey (1993), The Last Shift:The decline of handloom weaving in nineteenth-century Lancashire, Manchester: Manchester University Press, p. 253, ISBN 0 7190-3725-5
- Timmins, Geoffrey (1996), Four Centuries of Lancashire Cotton, Preston: Lancashire County Books, p. 92, ISBN 1-871236-41-X