Midland Railway

Midland Railway

The Midland Railway was a railway company in the United Kingdom from 1844 to 1922, when it became part of the London, Midland and Scottish Railway....

 1000 Class is a class of 4-4-0

4-4-0

Under the Whyte notation for the classification of steam locomotives, 4-4-0 represents the wheel arrangement of four leading wheels on two axles , four powered and coupled driving wheels on two axles, and no trailing wheels...

 steam locomotive

Steam locomotive

A steam locomotive is a railway locomotive that produces its power through a steam engine. These locomotives are fueled by burning some combustible material, usually coal, wood or oil, to produce steam in a boiler, which drives the steam engine...

 designed for passenger work.
These were developed from a series of five locomotives (2631–2635) introduced in 1902 by Samuel W. Johnson

Samuel W. Johnson

Samuel Waite Johnson was Chief Mechanical Engineer of the Midland Railway from 1873 to 1903. He was born in Bramley, Yorkshire and educated at Leeds Grammar School.-Career:...

 which had had a 3-cylinder compound

Compound locomotive

A compound engine unit is a type of steam engine where steam is expanded in two or more stages.A typical arrangement for a compound engine is that the steam is first expanded in a high-pressure cylinder, then having given up heat and losing pressure, it exhausts directly into one or more larger...

 arrangement on the Smith

Walter Mackersie Smith

Walter Mackersie Smith was a Scottish engineer who made an important contribution to the development of the compound steam locomotive. His middle name has sometimes been mis-spelt Mackenzie . He was born at Ferry-Port on Craig, Fife....

 system with one high pressure inside cylinder and two low pressure outside cylinders plus Smith's starting arrangement, reinforced working and for the first two locomotives, independent control of high-pressure and low-pressure valve gear

Valve gear

The valve gear of a steam engine is the mechanism that operates the inlet and exhaust valves to admit steam into the cylinder and allow exhaust steam to escape, respectively, at the correct points in the cycle...

s.