The Spaarne is a river in North Holland, Netherlands. This partially canalized river connects the Ringvaart to a side branch of the North Sea Canal. It runs through Haarlem, Heemstede, and Spaarndam.
The historic canals of Haarlem's moats are connected to the Spaarne. A lock at Spaarndam separates it from the North Sea Canal.
Spaarndam (Dutch pronunciation: [ˌspaːr(ə)nˈdɑm]) is a village in the province of North Holland, the Netherlands, on the Spaarne river and the IJ lake. The oldest part of the village, on the western side of the Spaarne, belongs to the municipality of Haarlem; the newer part on the eastern side is a part of the municipality of Haarlemmermeer. The village is built around a dam in the river, which is also the division line of the two municipalities.
Spaarndam was created around a dam where the river Spaarne flows into the IJ. This dam was built here by count Floris V of Holland in 1285. The village collected tolls at this dam, and people made their living from fishing. From 1812 to 1927, the western part of Spaarndam was an independent municipality.
A beam engine is a type of steam engine where a pivoted overhead beam is used to apply the force from a vertical piston to a vertical connecting rod. This configuration, with the engine directly driving a pump, was first used by Thomas Newcomen around 1705 to remove water from mines in Cornwall. The efficiency of the engines was improved by engineers including James Watt, who added a separate condenser; Jonathan Hornblower and Arthur Woolf, who compounded the cylinders; and William McNaught, who devised a method of compounding an existing engine. Beam engines were first used to pump water out of mines or into canals but could be used to pump water to supplement the flow for a waterwheel powering a mill.
The rotative beam engine is a later design of beam engine where the connecting rod drives a flywheel by means of a crank (or, historically, by means of a sun and planet gear). These beam engines could be used to directly power the line-shafting in a mill. They also could be used to power steam ships.