What is "unlimited pump"

Unlimited \Un*lim"it*ed\, a.

1. Not limited; having no bounds; boundless; as, an unlimited expanse of ocean.

2. Undefined; indefinite; not bounded by proper exceptions; as, unlimited terms. ``Nothing doth more prevail than unlimited generalities.''
   --Hooker.

3. Unconfined; not restrained; unrestricted.

   Ascribe not unto God such an unlimited exercise of mercy as may destroy his justice.
   --Rogers.

   Unlimited problem (Math.), a problem which is capable of an infinite number of solutions.

   Unlimited pump, a kind of deep-well pump placed at the level of the water, and operated from above ground. [1913 Webster] -- Un*lim"it*ed*ly, adv. -- Un*lim"it*ed*ness, n.

n. A kind of deep-well pump placed at the level of the water, and operated from above ground.