When was the Newcomen atmospheric engine invented?
Thomas Newcomen invented the atmospheric engine in 1712. The first successful example was erected at the Conygree Coalworks in Bloomfield Road, Tipton, in the Black Country.
Questions about Newcomen atmospheric engine
Short answers, pulled from the story.
How did the Newcomen engine work?
Steam from a low-pressure boiler filled a cylinder beneath a piston. A cold water spray then condensed the steam, creating a partial vacuum. Atmospheric pressure above the piston drove it down, pulling one end of a rocking beam and lifting pump rods in the mine shaft below. The cycle repeated around twelve times per minute.
What was the Newcomen engine used for?
Newcomen engines were used principally to pump water out of flooded mines, especially coal mines and tin mines. They were also used to pump municipal water supplies, including the first French example at Passy in 1726, which drew water from the Seine for Paris, and to return water to reservoirs above water wheels at sites such as Coalbrookdale.
How did James Watt improve on the Newcomen engine?
James Watt moved condensation out of the main cylinder into a separate exterior condenser unit, preventing the cylinder walls from being chilled with each stroke. This dramatically reduced fuel use. Watt's improvement in 1769 was prompted by his repair of a small Newcomen model for Glasgow University.
What was the snifting valve on a Newcomen engine?
The snifting clack, or snifter valve, was a release valve near the bottom of the cylinder that purged non-condensable air before each power stroke. Without it, dissolved air released from boiling water would accumulate in the cylinder until the engine became wind logged and stopped working. Its name came from the noise it made, compared at the time to a man snifting with a cold.
Where can you see a surviving Newcomen engine today?
Several survive. The only example still in its original location is at the Elsecar Heritage Centre near Barnsley, South Yorkshire, which ran commercially from 1795 until 1923. A full-scale working replica of the 1712 engine has operated at the Black Country Living Museum in Dudley since 1986. The Newcomen Memorial Engine is in Dartmouth, and further static examples are held at the Science Museum in London and the National Museum of Scotland.