John Ramsbottom was an English mechanical engineer. Born in Todmorden, then on the county border of Yorkshire and Lancashire. He was the Chief Mechanical Engineer for the London and North Western Railway for 14 years. He created many inventions for railways but his main legacy is the split metal piston ring, virtually all reciprocating engines continue to use these today.

Todmorden is a market town and civil parish in the Upper Calder Valley in Calderdale, West Yorkshire, England. It is 17 miles north-east of Manchester, 8 miles (13 km) south-east of Burnley and 9 miles (14 km) west of Halifax. In 2011, it had a population of 15,481.