airpumps

The lighted tube leveled off and the airpumps smoothly evened out the mo­mentary imbalance of air pressure so that no ears popped.

Behold the Stars Bulmer, Kenneth, 1921- 1965

After that it's the engine-room move, which gives the first class time to settle down and then shuts off the airpumps.

Love Stories Mary Roberts Rinehart 1917

The Senior Second, going on duty at midnight that night, found his Junior railing at fate and the airpumps going.

Love Stories Mary Roberts Rinehart 1917

Then there was the collection of all that would be needed for setting up a factory in the remote district for which they were bound: a stove; a smelting furnace, two airpumps for ventilation, an India-rubber boat, only inflated when required,

The Fur Country 1874

The duck used oars before we did; and rudders were known by every fish with a tail, countless ages before human pilots handled tillers; the floats on the fishermen's nets were pre-figured in the bladders on the sea weed; the glowworm and firefly held up their light-houses before pharas or beacon-tower guided the wanderer among men; and, as long before Phipps brought over the diving bell to this country as the creation, spiders were making and using airpumps to descend into the deep.

The Continental Monthly, Vol 3 No 3, March 1863 Devoted To Literature And National Policy Various