A device for pumping beer from a cask in a pub's cellar.

A locomotive going in advance of a train to make sure that the way is clear.

A standalone machine that combines an electrical generator with an engine.

plural of Cornish engine

A kind of beam engine used mainly for pumping water from mines. A heavy pump rod or plunger, raised by the steam, forces up the water by its weight in descending.

A civil engineer who determines the best course for a road or railway by surveying the available terrain.

A mechanical lift for raising or lowering people through considerable distances; specifically (mining) a contrivance by which miners ascend or descend in a shaft. It consists of a series of landings in the shaft and an equal number of shelves on a vertical rod which has an up and down motion equal to the distance between the successive landings. A man steps from a landing to a shelf and is lifted or lowered to the next landing, upon which he then steps, and so on, travelling by successive stages.

A vertical back-acting steam engine having the cylinder beneath the crosshead.

An aeolipile.

plural of Hero engine