James Nasmyth patents the steam hammer

Background. The development of the steam hammer arose from industrial needs for forging large iron or steel components, such as paddle shafts for steam engines. Traditional tilt-hammers lacked sufficient power and range for these tasks. James Nasmyth identified these defects and sketched a new design in 1839. This innovation aimed to solve the specific problem of forging shafts and cranks for increasingly large locomotives and paddle boats, marking a significant advancement in machine tool technology.

Patent and Priority Dispute. Nasmyth patented his steam hammer design in 1842, funding the process through borrowed money from his sister's husband. However, a dispute over priority of invention emerged in 1843. François Bourdon, who had visited Nasmyth's works in 1840, built the first working steam hammer in France in 1840. This led to an acrimonious conflict between Nasmyth and Bourdon regarding who had independently reinvented the machine, despite Nasmyth's earlier conceptual sketches.

Implementation at Patricroft. After returning from France in 1842, Nasmyth constructed his first steam hammer at his Patricroft foundry in Manchester. This facility was located near the Liverpool and Manchester Railway and the Bridgewater Canal. The machine was initially built for the Low Moor Works at Bradford, though they rejected the first version. An improved version with a self-acting gear was accepted in August 1843, demonstrating the practical application of Nasmyth's patented design.