Braithwaite & Ericsson

Braithwaite & Ericsson was a short-lived London engineering partnership formed by John Braithwaite (a steam engineer) and John Ericsson (a Swedish-American mechanical engineer). The firm operated from Braithwaite's family workshop at St Pancras, north London, building marine and stationary engines and (briefly) one famous locomotive.

Their entry Novelty in the 1829 Rainhill Trials was the most popular locomotive at the trials, reaching 28 mph, but suffered repeated boiler problems and was disqualified. The partnership built one further locomotive (William the Fourth) before dissolving in 1834. Ericsson moved to the United States in 1839, where he had a long and distinguished career as inventor of the screw propeller and designer of the USS Monitor.