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A shaftsinking method similar to caisson sinking except that reinforced concrete rings are used and an airtight working chamber is not adopted.



Related Terms

BLOWOUT

  1. The melting of an electric fuse because of excessive current. 2. The bursting of a container (such as a tube pipe, pneumatic tire, or dam) by the pressure of the contained fluid. 3. The rupture left by such bursting. 4. The abrupt escape of air from the working chamber of a pneumatic caisson.

ENGINE CYLINDER

A cylindrical chamber in an engine in which the energy of the working fluid, in the form of pressure and heat, is converted to mechanical force by performing work on the piston. Also known as cylinder.

PNEUMATIC CAISSON

A caisson having a chamber filled with compressed air at a pressure equal to the pressure of the water outside.

FURNACE EXPLOSION

A violent combustion of dust or gas accumulations in a furnace or combustion chamber of a boiler.

ORIFICE

(1) The opening from the whirling chamber of a mechanical atomizer or the mixing chamber of a steam atomizer thru which the liquid fuel is discharged. (2) A calibrated opening in a plate, inserted in a gas stream for measuring the velocity of flow.

PREPURGE PERIOD

A period on each start-up during which air is introduced into the combustion chamber and associated flue passages in volume and manner as to completely replace the air or fuel air-mixture contained therein prior to an attempt to initiate combustion.

OIL BURNER

A burner that atomizes fuel oil and blows it into the combustion chamber in the form of a fine mist or vapor. Steam or mechanical motion plus air may be used as the operating medium.

S.W.L.

Safe working load limit. Diameter squared x 8 x 2000 = SWL (lbs). Diameter squared x 8 = SWL (tons)

to BEACH

To run a vessel upon a beach to prevent its sinking in deep water

WINDBOX

A chamber below the grate or surrounding a burner, thru which air under pressure is supplied for combustion of the fuel.

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