Bury Bar Frame locomotive

[1] By the 1830s, the railway locomotive had evolved into three basic types - those developed by Robert Stephenson, Timothy Hackworth and Edward Bury.

[citation needed] Edward Bury set himself up as an iron founder in Liverpool in the 1820s and manufactured various metal goods including marine steam engines as well as railway locomotives.

During the 1840s Stephenson had increased the power in his long boiler locomotive, while in 1847 David Joy introduced the Jenny Lind design.

[citation needed] The use of the bar-frame and D-plan dome topped firebox became the classic American design of the nineteenth century, [11] being adopted by the major manufacturers Baldwin, Norris, and Rogers.

While Bury's four-wheeled engines were criticised for their alleged lack of strength and power they were in practice fast, reliable, low maintenance, and performed well on the typical 50-ton trains of the 1830s.

[15] In general they were superior to the type Stephenson six-wheelers of the same period that despite appearances had smaller boilers, poor weight distribution, and less longevity.

[15] The design was emulated by a number of manufacturers,[6] and they lasted on the London and North Western Railway until the 1860s,[citation needed] and on other lines until much later.