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This page has been archived and is no longer updated. Find out more about page archiving. The Beam Engine Animation. British History Timeline.
Both of the engines at Crofton employ the Cornish Cycle, so called because it was developed by Cornish engineers for use in their tin mine pumping engines. The Cornish Cycle combines the use of steam pressure to push upon the piston and the vacuum produced when steam is condensed in an enclosed space to pull the piston.
James Watt used both steam pressure and vacuum, but the arrangement of Watt valve gear and condenser was not as efficient as that employed by the Cornish engineers and, strictly speaking, engines built to the Watt design were not Cornish Cycle Engines. At this time the engine was also replaced. The condensed water in the condenser chamber is extracted by means of the Air Pump so called because there is also air in the condenser and the pump extracts this as well.
The Air Pump discharges the condensed water into the Hot Well which is the boiler feed reservoir. ASME Membership 1 year has been added to your cart. The price of yearly membership depends on a number of factors, so final price will be calculated during checkout.
Section Menu. Landmark Locations. About the Landmarks Program. Examples in the Landmark Process. Gaps List for Landmark Nominators. The steam cylinder piston goes down under the pressure of steam and differences in atmospheric pressure created by the partial vacuum beneath the piston. The beam, powered by the cylinder piston, pulls up the water pump piston.
At the end of the downward stroke, the steam pressure is released and the steam cylinder piston returns to its original position because it is dragged back up the cylinder by the weight of the pump rods at the other end of the beam. It was actually built for the site to pump water to West London and started work on the 30th May The massive engine was constructed for the Grand Junction Water Works company and is able to pump gallons in just a single stroke. The beam, which is made from cast iron, weighs a staggering 35 tons.
The engine was transported from Cornwall to London by ship, before being loaded onto a barge for the journey up the Thames River. Today's schedule.
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