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What is the meaning of PISTON. Phrases containing PISTON
See meanings and uses of PISTON!PISTON
PISTON
PISTON
PISTON
PISTON
PISTON
Acronyms & AI meanings
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Common Data Descriptor
Boynton Beach, Florida
PISTON
PISTON
PISTON
n.
A powerful brass instrument of the trumpet kind, thought by some to be the ancient sackbut, consisting of a tube in three parts, bent twice upon itself and ending in a bell. The middle part, bent double, slips into the outer parts, as in a telescope, so that by change of the vibrating length any tone within the compass of the instrument (which may be bass or tenor or alto or even, in rare instances, soprano) is commanded. It is the only member of the family of wind instruments whose scale, both diatonic and chromatic, is complete without the aid of keys or pistons, and which can slide from note to note as smoothly as the human voice or a violin. Softly blown, it has a rich and mellow sound, which becomes harsh and blatant when the tones are forced; used with discretion, its effect is often solemn and majestic.
n.
A device, with valves, for raising water by steam, partly by atmospheric pressure, and partly by the direct action of the steam on the water, without the intervention of a piston; -- also called vacuum pump.
n.
A lining within the cylinder, in which the piston works and between which and the outer shell of the cylinder a space is left to form a steam jacket.
n.
An hydraulic machine, variously constructed, for raising or transferring fluids, consisting essentially of a moving piece or piston working in a hollow cylinder or other cavity, with valves properly placed for admitting or retaining the fluid as it is drawn or driven through them by the action of the piston.
n.
The width of port opening which is uncovered by the valve, for the admission or release of steam, at the instant when the piston is at end of its stroke.
n.
Motion; movement, regular or irregular; as, the play of a wheel or piston; hence, also, room for motion; free and easy action.
n.
A kind of small hand-pump for throwing a stream of liquid, or for purposes of aspiration. It consists of a small cylindrical barrel and piston, or a bulb of soft elastic material, with or without valves, and with a nozzle which is sometimes at the end of a flexible tube; -- used for injecting animal bodies, cleansing wounds, etc.
n.
One of the series of disks or pistons in the chain pump.
n.
The substance in a stuffing box, through which a piston rod slides.
v. t.
The movement, in either direction, of the piston plunger, piston rod, crosshead, etc., as of a steam engine or a pump, in which these parts have a reciprocating motion; as, the forward stroke of a piston; also, the entire distance passed through, as by a piston, in such a movement; as, the piston is at half stroke.
n.
A brass wind instrument, like the trumpet, furnished with valves moved by small pistons or sliding rods; a cornopean; a cornet.
n.
A kind of cage inserted in a stuffing box and surrounding a piston rod, to separate the packing into two parts and form a chamber between for the reception of steam, etc. ; -- called also lantern brass.
n.
A yielding ring, as of metal, which surrounds a piston and maintains a tight fit, as inside a cylinder, etc.
n.
A large pipe forming the piston rod of a steam engine, of sufficient diameter to allow one end of the connecting rod to be attached to the crank, and the other end to pass within the pipe directly to the piston, thus making the engine more compact.
n.
The extreme movement given to a sliding or vibrating reciprocating piece by a cam, crank, eccentric, or the like; travel; stroke; as, the throw of a slide valve. Also, frequently, the length of the radius of a crank, or the eccentricity of an eccentric; as, the throw of the crank of a steam engine is equal to half the stroke of the piston.
n.
A long solid cylinder, used, instead of a piston or bucket, as a forcer in pumps.
n.
A skeleton, or frame, having radiating arms or members, often connected by crosspieces; as, a casting forming the hub and spokes to which the rim of a fly wheel or large gear is bolted; the body of a piston head; a frame for strengthening a core or mold for a casting, etc.
n.
A sliding piece which either is moved by, or moves against, fluid pressure. It usually consists of a short cylinder fitting within a cylindrical vessel along which it moves, back and forth. It is used in steam engines to receive motion from the steam, and in pumps to transmit motion to a fluid; also for other purposes.
n.
A wind instrument of great antiquity, much used in war and military exercises, and of great value in the orchestra. In consists of a long metallic tube, curved (once or twice) into a convenient shape, and ending in a bell. Its scale in the lower octaves is limited to the first natural harmonics; but there are modern trumpets capable, by means of valves or pistons, of producing every tone within their compass, although at the expense of the true ringing quality of tone.
pl.
of Cornet-a-piston
PISTON
PISTON