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A pneumatic or hydraulic cushion for a falling weight, as in the valve gear of a steam engine, to prevent shock.

Disembarkation. The debarkation, therefore, had to take place by small steamers. U. S. Grant.

to it; a mechanical drawing, as distinguished from an artistical one. Indicator diagram. (Steam Engine) See Indicator card, under indicator

n daunt mine ears Shak. He knew the battle's din afar. Sir W. Scott. The dust and din and steam of town. Tennyson.

as one part upon another, without the intervention of other working parts. Direct-acting steam engine, one in which motion is transmitted to the crank without the intervention of a beam or lever; -- also called direct-action steam engine. -- Direct-acting steam pump, one in which the steam piston rod is directly conn…

In owls, the space around the eyes. Disk engine, a form of rotary steam engine. -- Disk shell (Zoöl.), any species of Discina.

solvent. Piston displacement (Mech.), the volume of the space swept through, or weight of steam, water, etc., displaced, in a given time, by the piston of a steam engine or pump.

distillation of illuminating gas and coal, of alcohol from sour mash, or of boric acid in steam.

The steps or operations by which steam is supplied to and withdrawn from the cylinder at each stroke of the piston; viz., admission, suppression or cutting off, release or exhaust, and compression of exhaust steam prior to the next admission. Geographical distribution, the natural arrangements of animals and plants in…

resembling the dome or cupola of a building; as the upper part of a furnace, the vertical steam chamber on the top of a boiler, etc.

ping water into the boilers, raising heavy weights, and like purposes. -- Donkey pump, a steam pump for feeding boilers, extinguishing fire, etc.; -- usually an auxiliary. -- Donkey's eye (Bot.), the large round seed of the Mucuna pruriens, a tropical leguminous plant.

The difference between the speed of a screw steamer under sail and that of the screw when the ship outruns the screw; or between the propulsive effects of the different floats of a paddle wheel. See Citation under Drag, v. i., 3. Drag sail (Naut.), a sail or canvas rigged on a stout frame, to be dragged by a vessel thr…

ng an apartment by means of heat received from a stovepipe, or a cylindrical receiver for steam, etc.

led also Zamboni's , from the names of the two earliest constructors of it. -- Dry pipe (Steam Engine), a pipe which conducts dry steam from a boiler. -- Dry plate (Photog.), a glass plate having a dry coating sensitive to light, upon which photographic negatives or pictures can be made, without moistening. -- Dry-p…

Appointed or required to arrive at a given time; as, the steamer was due yesterday.

A locomotive with condensing engines, and, hence, without the noise of escaping steam; also, a dummy car.

cutting tools, on opposite sides of the piece operated upon. -- Duplex pumping engine, a steam pump in which two steam cylinders are placed side by side, one operating the valves of the other. -- Duplex querela Etym: [L., double complaint] (Eccl. Law), a complaint in the nature of an appeal from the ordinary to his i…

The efficiency of an engine, especially a steam pumping engine, as measured by work done by a certain quantity of fuel; usually, the number of pounds of water lifted one foot by one bushel of coal (94 lbs. old standard), or by 1 cwt. (112 lbs., England, or 100 lbs., United States).

Pertaining to an eccentric; as, the eccentric rod in a steam engine.

Specifically: (Steam Boilers) An arrangement of pipes for heating feed water by waste heat in the gases passing to the chimney.