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We will start with the development of the steam engine, as this apparatus was an integral part of the railroad. A Greek, Hero of Alexandria, built the first operating steam device around the first century AD. It was called the aeoliphile, and it consisted of a hollow ball mounted on two metal tubes in such a way that the ball could turn, using the tubes as axles. Two additional tubes exited the ball, perpendicular to the axles. These tubes were bent at about a ninety degree angle. The axle tubes were connected to a boiler which supplied steam to the ball when the water in the boiler was heated. The steam exited the ball through the vent tubes, causing the ball to spin. The aeoliphile was considered a toy by the ancient world and no practical application was ever found for it. |
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The first important step in steam driven mechanical power needed for the
development of the railroad came in 1705. Coal was an important source of
heat for homes and businesses at this time. And this coal had to be mined.
Coal mines, since they are underground, have the unfortunate habit of
collecting water. In pre-industrial times, removing this water was a major
problem. An English military engineer named Thomas Newcomen solved this
problem with his invention of the steam powered suction pump. This pump, it
was found, could also supply water to large buildings. The reciprocating
action of the engine limited it to pumping water. |
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James Watt began a twenty five year career in improvements to this pump in 1764 when he was called on to repair a Newcomen engine. The "sun and planet" gear system he devised in 1781 changed the engines reciprocating movement, to a rotary one. This improvement, combined with many others which Mr. Watt conceived, led to a whole host of applications for the new steam engine. The development of the steam engine led to the Industrial Revolution and the dawn of a new era in human history. |
