https://en.wikipedia.org/wiki/Newcomen_atmospheric_engine
Watt's design, introduced in 1769, did not eliminate Newcomen engines immediately. Watt's vigorous defence of his patents resulted in the continued use of the Newcomen engine in an effort to avoid royalty payments. When his patents expired in 1800, there was a rush to install Watt engines, and Newcomen engines were eclipsed, even in collieries.

https://www.britannica.com/biography/Thomas-Newcomen
Thomas Newcomen (baptized February 28, 1664, Dartmouth, Devon, England—died August 5, 1729, London) was a British engineer and inventor of the atmospheric steam engine, a precursor of James Watt's engine. (Read James Watt's 1819 Britannica essay on the steam engine.) As an ironmonger at Dartmouth, Newcomen became aware of the high cost of

https://www.youtube.com/watch?v=QltRwiu4U2Q
Animated - A brief look at the Newcomen and the Boulton & Watt steam engines of the 18th & 19th century.Produced by: Michael De Greasley

https://ethw.org/Thomas_Newcomen_and_the_Steam_Engine
Newcomen's first engine went into operation around 1710. It was more than 50 years later that James Watt introduced the steam engines of his contrivance. Watt's engine was not a fundamentally new concept, but it had the advantage over Newcomen's of greatly improved efficiency. Watt made the steam engine economically attractive and allowed its

https://www.britannica.com/technology/Watt-steam-engine
While repairing a model Newcomen steam engine in 1764, Watt was perturbed by its waste of steam. In May 1765, after wrestling with the problem of improving it, he suddenly came upon a solution: the separate condenser, his first invention.Watt had realized that the loss of latent heat (the heat involved in changing the phase of a substance—e.g., solid or liquid) was the worst defect of the

https://www.britannica.com/technology/Newcomen-steam-engine
In James Watt: The Watt engine. While repairing a model Newcomen steam engine in 1764, Watt was impressed by its waste of steam. In May 1765, after wrestling with the problem of improving it, he suddenly came upon a solution—the separate condenser, his first and greatest invention. Watt had realized that the loss of latent… Read More

https://www.nms.ac.uk/explore-our-collections/stories/science-and-technology/newcomen-engine/
The Carron Company, Falkirk, first supplied parts for a Newcomen Engine to Sir William Cunninghame of Caprington in 1781, but the pumping shaft collapsed in 1828 and that mine was subsequently abandoned. Despite having a poorer fuel efficiency than a Watt engine, another Newcomen was ordered from the same firm in 1811 at a cost of £352.42

https://en.wikipedia.org/wiki/History_of_the_steam_engine
In the engines of Newcomen and Watt, it is the condensation of the steam that creates most of the pressure difference, causing atmospheric pressure (Newcomen) and low-pressure steam, seldom more than 7 psi boiler pressure, plus condenser vacuum (Watt), to move the piston. In a high-pressure engine, most of the pressure difference is provided by

https://en.wikipedia.org/wiki/Thomas_Newcomen
Animation of a schematic Newcomen engine. - Steam is shown pink and water is blue. - Valves move from open (green) to closed (red) Thomas Newcomen (/ ˈ nj uː k ʌ m ə n /; February 1664 - 5 August 1729) was an English inventor who created the atmospheric engine, the first practical fuel-burning engine in 1712.He was an ironmonger by trade and a Baptist lay preacher by calling.

https://www.thoughtco.com/thomas-newcomen-profile-1992201
Thomas Newcomen (February 28, 1663-August 5, 1729) was a blacksmith from Dartmouth, England who assembled the prototype for the first modern steam engine. His machine, built in 1712, was known as the "Atmospheric Steam Engine." Spouse: Hannah Waymouth (m. July 13, 1705) Before Thomas Newcomen's time, steam engine technolog y was in its infancy.

https://historycooperative.org/who-invented-the-steam-engine/
The steam engine's invention by Thomas Newcomen, and its refinement by James Watt and others, marked a pivotal juncture in human history. Conceived in England to address a mining nuisance, the steam engine catapulted into the heart of the Industrial Revolution.

https://www.worldhistory.org/Watt_Steam_Engine/
James Watt. Watt was born in Greenock, Scotland in 1736. He trained in London and was employed by the University of Glasgow as the university's mathematical instrument maker when, in 1764, he was given a model of Newcomen's steam engine and asked by the university to repair it. In the course of his repairs, Watt realised there were several ways

https://cosmosmagazine.com/science/full-steam-ahead-the-journey-from-thomas-newcomen-to-james-watt/
"The Watt engine, like the Newcomen engine, operated on the principle of a pressure difference created by a vacuum on one side of the piston to push the steam piston down. However, Watt's

https://www.worldhistory.org/article/2166/the-steam-engine-in-the-british-industrial-revolut/
The steam engine was invented by Thomas Newcomen in 1712 to drain coal mines of water. What was the steam engine used for? The steam engine was first used to pump water from flooded shafts in coal mines (in 1712). Later steam engines were used for cotton looms, hammers, trains, ships, and any kind of heavy machinery in agriculture and factories.

https://science.howstuffworks.com/innovation/inventions/watt-steam-engine.htm
The Watt steam engine, invented by James Watt during the Industrial Revolution, stands as a groundbreaking tehcnological advancement that propelled the world forward through improved forms of transportation. And while Watt did something truly innovative, he also built on the work of previous inventors, including Thomas Savery and Thomas Newcomen.

https://www.livescience.com/2612-steam-engine-changed-world.html
The technology was improved with pistons and cylinders by Thomas Newcomen, a blacksmith, and again by Watt in the mid-18th century. ... high-pressure steam engines had become compact enough to

https://www.egr.msu.edu/~lira/supp/steam/
The Newcomen engine was the best technology for 60 years! Some Newcomen engines were used much longer, even though they were significantly inferior to the Watt engines that followed. For more details of operation and photos of the oldest existing Newcomen engine, see the Newcomen Engine Description. Watt Atmospheric Steam Engine

https://en.wikipedia.org/wiki/Watt_steam_engine
The Watt steam engine design was an invention of James Watt that became synonymous with steam engines during the Industrial Revolution, and it was many years before significantly new designs began to replace the basic Watt design. The first steam engines, introduced by Thomas Newcomen in 1712, were of the "atmospheric" design.

http://scihi.org/thomas-newcomen-steam-engine/
On February 26 (or maybe also 24), 1664, English inventor Thomas Newcomen was born, who created the first practical steam engine for pumping water, the Newcomen steam engine.. Steam Engines. As we know from a previous article on James Watt and the Steam Age Revolution [5], Watt was the one improving Newcomen 's engine in the 18th and 19th century.Since the knowledge about the power of

https://hsm.stackexchange.com/questions/136/who-invented-the-steam-engine-newcomen-or-watt
Both Newcomen and Watt invented 'steam' engines. Both operated by injecting steam into a cylinder, moving a piston in the cylinder. Newcomen's engine is often described as a steam engine but the steam pressure is not really performing the work. Instead, the steam is condensed (by injecting a small amount of water) to produce a partial vacuum.

https://www.sjsu.edu/faculty/watkins/newcomen5.htm
Newcomen Steam Engine. From the perspective of the 21st century the steam engine invented by Thomas Newcomen (1663-1729) of Darmouth seems pathetically primitive, particularly after its replacement with the steam engine of James Watt. But in its time the Necomen engine was a major technological advance. There had been steam power devices before

https://www.britannica.com/biography/James-Watt
While repairing a model Newcomen steam engine in 1764, Watt was impressed by its waste of steam. In May 1765, after wrestling with the problem of improving it, he suddenly came upon a solution—the separate condenser, his first and greatest invention.Watt had realized that the loss of latent heat (the heat involved in changing the state of a substance—e.g., solid or liquid) was the worst

https://www.cambridge.org/core/books/british-patent-system-during-the-industrial-revolution-17001852/patents-and-the-newcomen-and-watt-steam-engines/BC0AC9619281F373C6DE0CF252C2D63B
> Patents and the Newcomen and Watt steam engines; The British Patent System during the Industrial Revolution 1700-1852. From Privilege to Property. Buy print or eBook [Opens in a new window] Book contents. The British Patent System During the Industrial Revolution 1700-1852. Series page.