PNEUMATIC CAISSON • FREE TRANSLATOR.ORG • Definition of Pneumatic caisson

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/numˈætɪk kˈeɪsən/ Listen

noun

Caisson n.

(Mil.)

(a)

A chest to hold ammunition.

(b)

A four-wheeled carriage for conveying ammunition, consisting of two parts, a body and a limber. In light field batteries there is one caisson to each piece, having two ammunition boxes on the body, and one on the limber.

(c)

A chest filled with explosive materials, to be laid in the way of an enemy and exploded on his approach.

(a)

A water-tight box, of timber or iron within which work is carried on in building foundations or structures below the water level.

(b)

A hollow floating box, usually of iron, which serves to close the entrances of docks and basins.

(c)

A structure, usually with an air chamber, placed beneath a vessel to lift or float it.

(Arch.) A sunk panel of ceilings or soffits.

Pneumatic caisson (Engin.), a caisson, closed at the top but open at the bottom, and resting upon the ground under water. The pressure of air forced into the caisson keeps the water out. Men and materials are admitted to the interior through an air lock. See Lock.

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Etymology of 'Pneumatic caisson'

Collaborative International Dictionary of English 0.48

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"Pneumatic caisson" Quotes from Famous Books

... places, almost entirely through the fill and mud and was made in a cofferdam composed chiefly of sheet piles. As it was impossible to drive these piles across the old timber crib which formed the old dock front, the latter was cut through by a pneumatic caisson of wooden-stave construction, which formed part of one side of the cofferdam. At the river end of the cofferdam the rock was so deep that the concrete could not be carried down to its surface, and the tunnel section ...

— The New York Subway - Its Construction and Equipment • Anonymous