[1] The two men had experimented with steam engine building for years and, as early as 1829, designed a locomotive to burn anthracite coal.
One of the most historic events in railroading history occurred on July 10, 1836, when the Norris Brothers ran a test of a 4-2-0 locomotive on the Belmont Inclined Plane of the Philadelphia and Columbia Railroad The two-track incline ran from the Schuylkill River for 2,805 feet towards present-day Belmont Avenue, rising one foot in 15 for a total of 187 feet.
This engine, the first in the world to ascend a hill by its own power, proved that a steam locomotive could climb a grade while pulling a load.
Norris built the Lafayette for the Baltimore and Ohio Railroad the following year based on plans of the George Washington.
Innovations included positioning of cylinders outside and adjacent to the smokebox with pistons connecting to the face of the drive wheels instead of a crank axle, the four-wheel swiveling pilot truck, inside bar frame support, and placement of the two drivers ahead of the firebox (this supposedly offered greater power output as more of the locomotive's weight rested on the drivers and therefore increased tractive effort).
Some authorities claim that Septimus Norris came up with the design, but other sources attribute it to master builder John Brandt of the Erie Railway.
Other locomotive factories, operated independently (and unsuccessfully) by various Norris brothers later opened in Lancaster, Pennsylvania, and Schenectady, New York.
A quarter-sized 4-4-0 locomotive and tender were built for Commodore Matthew C. Perry to deliver as a gift on his second expedition to Japan in 1854.
Employing many hundreds of men, the factory consisted of some ten buildings spread over several city blocks at what is now the campus of the Community College of Philadelphia.