steeple-engine

from The Century Dictionary.

• noun A form of marine steam-engine used on side-wheel boats, in which the working-beam is the highest part, and the connecting-rod is above the crank-shaft.
• noun A direct-acting engine in which the crank-shaft is located between the cylinder and the sliding-block or cross-head, the piston-rod is connected with the latter by two branches or limbs which straddle the crank-shaft and crank, and the connecting-rod or pitman plays between the limbs of the piston-rod. It is used for steam-pumps and donkey-engines, being very compact in form.