William Norris (locomotive builder)
Encyclopedia
William Norris was an American
United States
The United States of America is a federal constitutional republic comprising fifty states and a federal district...

 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...

 builder. He founded the Norris Locomotive Works
Norris Locomotive Works
The Norris Locomotive Works was a steam locomotive manufacturing company based in Philadelphia, Pennsylvania, that produced about a thousand railroad engines between 1832 and 1866. It was the dominant American locomotive producer during most of that period, and even sold its popular 4-2-0 engines...

 and through this company pioneered the use of the 4-2-0
4-2-0
Under the Whyte notation for the classification of steam locomotives, 4-2-0 represents the wheel arrangement of four leading wheels on two axles, two powered and coupled driving wheels on one axle, and no trailing wheels...

(the Norris type) locomotive type in America during the 1840s.
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