Steam Pump Invented
In 1698, the English military engineer and inventor Thomas Savery patented a machine for raising water using the force of fire, a device he later called "the Miner's Friend." It was the first steam-powered pump to be offered for practical use. Although Savery's engine was limited and inefficient, it showed that steam could do useful work, and it opened a line of development that led to the engines driving the Industrial Revolution. Historians generally see it as a forerunner of that revolution rather than its starting point.
The problem Savery addressed was flooding. By the late seventeenth century, mines in Cornwall and elsewhere in Britain had reached depths where groundwater threatened to halt work, and horse-driven pumps and chains of buckets were costly and slow. Scientists of the period had also been experimenting with vacuums and atmospheric pressure. Work by Evangelista Torricelli, Otto von Guericke, and Denis Papin had demonstrated that air pressure could be harnessed, and Papin in particular explored the use of steam in a cylinder. Savery drew on this climate of experiment, though how much he owed to specific predecessors is debated.
His engine had no piston. Steam from a boiler filled a closed vessel, and cold water poured over the outside made the steam condense, creating a partial vacuum that drew water upward through a pipe from below. Fresh steam under pressure could then push water higher. In practice the lift was limited, since atmospheric pressure can raise water only about ten meters by suction, and high-pressure steam strained the boilers and joints of the era, sometimes dangerously. Savery's patent was granted in 1698 and was soon extended by Parliament, giving him broad protection over any engine that raised water by fire.
The Miner's Friend was not widely successful in mines, but versions were used to supply water to houses and estates. Its greater importance lay in what came next. Thomas Newcomen, an ironmonger from Devon, built a more practical engine around 1712 that used a piston and cylinder. Because Savery's patent was so broad, Newcomen reportedly had to work in association with it. Newcomen's design spread across British mines for decades.
In the 1760s and 1770s, James Watt's separate condenser made steam engines far more fuel-efficient, and later developments adapted them to power factories, locomotives, and ships. Savery's pump was therefore an early step in a chain of improvements rather than a sudden breakthrough. Its legacy is the demonstration that heat could be converted into mechanical work on a commercial scale, an idea that reshaped industry, transport, and the broader economy over the following two centuries.