Displacement lubricator

Displacement lubricator

The displacement lubricator is an automatic oil lubricator for steam engines, first introduced in the United Kingdom in 1860 by John Ramsbottom. It operates by allowing steam to enter a closed vessel containing oil. After condensing, the water sinks to the bottom of the vessel, causing the oil to rise and overflow into delivery pipes. In a steam locomotive, it was often positioned in the cab where the rate of oil feed could be observed.


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