Jonathan Hornblower (5 July 1753 – 23 February 1815)[1] was an English pioneer of steam power.
He was baptised at Trelever on 25 July 1773, aged 20 (he and his family were much involved in Baptist churches in Cornwall), and was apprenticed to a metal-working tradesman at Penryn.
[3] His compound engine principle was not revived until 1804 (by Arthur Woolf[3]) following the expiration of Boulton and Watt's patent.
The engine's construction was the most complex so far, but as before he ran into trouble with Watt's patents on these subjects.
[further explanation needed] Encyclopædia Britannica (2007): Jonathan Carter Hornblower.