Improved steam engine

Watt's enhancements increased efficiency and power output by recycling steam, maintaining constant cylinder pressure, and enabling use of the engine for driving machinery, which was a pivotal development in the industrial revolution.
 James Watt England 1781 Improved steam engine

Watt's enhancements increased efficiency and power output by recycling steam, maintaining constant cylinder pressure, and enabling use of the engine for driving machinery, which was a pivotal development in the industrial revolution.