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Piston   Listen
noun
Piston  n.  (Mach.) 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.
Piston head (Steam Eng.), that part of a piston which is made fast to the piston rod.
Piston rod, a rod by which a piston is moved, or by which it communicates motion.
Piston valve (Steam Eng.), a slide valve, consisting of a piston, or connected pistons, working in a cylindrical case which is provided with ports that are traversed by the valve.






Collaborative International Dictionary of English 0.48








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"Piston" Quotes from Famous Books



... experiments should be made on water pipes at high pressure, and of various diameters. Of machines worked by water pressure the author proposes to refer only to two which appear to him in every respect the most practical and advantageous. One is the piston machine of M. Albert Schmid, engineer at Zurich. The cylinder is oscillating, and the distribution is effected, without an eccentric, by the relative motion of two spherical surfaces fitted one against the other, and having the axis of oscillation for a common axis. The convex surface, ...
— Scientific American Supplement No. 275 • Various

... But not unequal work. The work must be unequal if the conditions are unequal. It's not the same machine. To turn a woman on to a man's work is like trying to run an express train by clock-work, with a pendulum for a piston, ...
— Superseded • May Sinclair

... will join them, but on condition that you forthwith drink up to two bottles full of Hungarian wine, Champagne, or Cape, just to bring you up to their mark.—My dear fellow, we are all so much on here, that it was necessary to close the Opera. The manager is as drunk as a cornet-a-piston; he is hiccuping already." ...
— Cousin Betty • Honore de Balzac

... the first time we went into Loando. I have learned that wretched hole well enough since. And it was as we were running out of Loando, that, in reversing the engine too suddenly, lest we should smash up an old Portuguese woman's bum-boat, that the slides or supports of the piston-rod just shot out of the grooves they run in on the top, came cleverly down on the outside of the carriage, gave that odious g-r-r-r, which I can hear now, and then, dump,—down came the whole weight of the walking-beam, bent rod and carriages all into three figure 8's, ...
— The Man Without a Country and Other Tales • Edward E. Hale

... with a piston made of two circular pieces of the same metal, each put into a strong leather cup, and bolted to the other. The bottoms of the cups being together, when the piston becomes loose in the barrels, and there is not sufficient time to replace the cups by new ...
— Fire Prevention and Fire Extinction • James Braidwood

... hand is almost crushed, and because I was not prepared for it, I gave a slight cry. Who would have thought that such a fine, white, delicate hand could give you a squeeze like a piston-rod?" ...
— The Son of Monte-Cristo, Volume II (of 2) • Alexandre Dumas pere

... 'Ramblers' we are informed that the accent in blank verse ought properly to rest upon every second syllable throughout the whole line. A little variety must, he admits, be allowed to avoid satiety; but all lines which do not go in the steady jog-trot of alternate beats as regularly as the piston of a steam engine, are more or less defective. This simple-minded system naturally makes wild work with the poetry of the 'mighty-mouthed inventor of harmonies.' Milton's harsh cadences are indeed excused on the odd ground ...
— Hours in a Library - New Edition, with Additions. Vol. II (of 3) • Leslie Stephen

... went back and shot forward like a piston rod. This time it left an ugly gash over ...
— Mavericks • William MacLeod Raine

... of human ingenuity—Mr. Buchanan says so," squealed the high-pressure cylinder. "This is simply ridiculous!" The piston went up savagely, and choked, for half the steam behind it was mixed with dirty water. "Help! Oiler! Fitter! Stoker! Help I'm choking," it gasped. "Never in the history of maritime invention has such a calamity over-taken one so young and strong. And if ...
— The Day's Work, Volume 1 • Rudyard Kipling

... one part tried to move it would be interfered with by the others, and the whole thing would buckle up and be checked. Liberty for the several parts would consist in the best possible assembling and adjustment of them all, would it not? If you want the great piston of the engine to run with absolute freedom, give it absolutely perfect alignment and adjustment with the other parts of the machine, so that it is free, not because it is let alone or isolated, but because it has been associated most skilfully and carefully ...
— The New Freedom - A Call For the Emancipation of the Generous Energies of a People • Woodrow Wilson

... and the hope sprung up in her heart that he might not see Tom at all; but she could not utter a word, and stood returning Godfrey's gaze like one fascinated with terror. Presently her heart began again to bear witness in violent piston-strokes. ...
— Mary Marston • George MacDonald

... written, so Miss Anthony, with vol. III. and bushels of manuscripts, fled to the peaceful home of her sister Mary at Rochester. The expected party sailed from Liverpool the 26th of May, on the America After being out three days the piston rod broke and they were obliged to return. My son-in-law, W.H. Blatch, was so seasick and disgusted that he remained in England, and took a fresh start two months later, and had a swift passage ...
— Eighty Years And More; Reminiscences 1815-1897 • Elizabeth Cady Stanton

... the moment Faith turns his back on Fact, and looks at Feeling, the procession wabbles. Steam is of main importance, not for sounding the whistle, but for moving the wheels; and if there is a lack of steam we shall not remedy it by attempting by our own effort to move the piston or blow the whistle, but by more water in the boiler, and more fire under it. Feed Faith with Facts, not with Feeling.—A. ...
— The Great Doctrines of the Bible • Rev. William Evans

... the exhaust stroke, had not entirely evacuated all of the products of combustion. The Atkinson engine, patented in 1887, was one of the attempts to solve this as well as several other problems, thus creating a more efficient cycle. This engine was designed so that the exhaust stroke carried the piston all the way to the head of the engine, while the compression stroke only moved the piston far enough to sufficiently compress the mixture. The unusual linkage necessary to create these unequal strokes in the Atkinson ...
— The 1893 Duryea Automobile In the Museum of History and Technology • Don H. Berkebile

... his wrecker's errand, kindled within him a strength that was unnatural, superhuman. Like a wildcat he tore loose from the choking grip on his throat; Istafiev tried to subdue that sudden, unlooked-for surge of power, but could not. Five piston-like, jabbing blows crunched into him from Chris's hurtling fist, and with the fifth Istafiev faded ...
— Raiders Invisible • Desmond Winter Hall

... cannot directly aid it, for so far as is known it is an unalterable quantity, like gravitation. But he can accomplish the same thing indirectly by weakening the power of the rival force. Thus, if he encloses a portion of gas in a cylinder and drives a piston down against it, he is virtually aiding cohesion by forcing the molecules closer together, so that the hold of cohesion, acting through a less distance, is stronger. What he accomplishes here is not all gain, however, for the bounding molecules, thus jammed together, come ...
— A History of Science, Volume 5(of 5) - Aspects Of Recent Science • Henry Smith Williams

... freshness, her nattiness, the very protection she shed over me, were working sad mischief to my peace of mind. I came upon an old shepherd, who, with his music-book thrown into a bush in front of him, was leaning back against a tree and drawing sweet sounds out of a cornet-a-piston. ...
— Lippincott's Magazine. Vol. XII, No. 33. December, 1873. • Various

... are made and united with the body of the vessel in the same way. Small handles, beadings, mouldings, &c. are formed by means of an iron cylinder, having its bottom perforated so as to mould the clay, as it passes through, into the required figure. A piston is inserted into the top of the cylinder, and caused to descend slowly by means of a screw, in consequence of which the clay is continually passing out through the perforation, and is cut ...
— The Mirror of Literature, Amusement, and Instruction - Vol. 19, Issue 550, June 2, 1832 • Various

... a group of worried trainmen gathered about the engine, and it needed but a glance to show what the trouble was. The piston rod had broken while the ponderous engine was going at full speed, and the driving rods, which had broken off from where they were fastened to the wheels, had been driven deep into the ground. This had served to fairly lift the ...
— The Motor Boys on the Pacific • Clarence Young

... life in the silent forests of the White Nile. There were several good men who had received a European mechanical education among those I had brought from Egypt; these were now engaged with the English engineers in repairing the engine of the No. 10 steamer, which required a new piston. I ordered a number of very crooked bill-hooks to be prepared for cutting the tangled vegetation during our next voyage. The first boat, about sixteen feet long, was progressing, and the entire station was a field of industry. The gardens were green with vegetables, and everything ...
— Ismailia • Samuel W. Baker

... partner with the firm of Stephenson & Mackenzie. If ever you're up in Greenock direction, and want to see how we do it, just ask for Donal Mackenzie, and they'll show you the place. (Proudly.) We're the sole makers of the Mackenzie piston, if ever you heard ...
— The Drone - A Play in Three Acts • Rutherford Mayne

... than a short, thick "S"-wrench, of the kind used by locomotive engineers in tightening the nuts of the piston-rod packing glands. ...
— The Taming of Red Butte Western • Francis Lynde

... in perfect working order, and shone like silver, one bearing the name of Worden, the other that of Ericsson. Her engineer, Mr. Campbell, was in the act of giving some final touches to the machinery, when his leg was caught between the piston-rod and frame of one of the oscillating engines, with such force as to bend the rod, which was an inch and a quarter in diameter and about eight inches long, and break its cast-iron frame, five-eighths of an inch in thickness. The most remarkable fact in ...
— Atlantic Monthly, Vol. 11, No. 65, March, 1863 • Various

... palm. They are absolutely straight and true; in fact, they resemble very much a lady's hat-pin. When the gun is to be used, a piece of cotton is wound around the end of an arrow and the other end or point inserted first in the barrel, the cotton acting as a piston by means of which the air forces the shaft ...
— In The Amazon Jungle - Adventures In Remote Parts Of The Upper Amazon River, Including A - Sojourn Among Cannibal Indians • Algot Lange

... Mrs. Graves, "just as in an engine something causes both the steam and the piston-rod; it's an intelligence somewhere that fits the one to the other. But then, as you say, what is the cause of all this extravagance and violence ...
— Watersprings • Arthur Christopher Benson

... the steam, after having pushed the piston to the end of the stroke, escapes into the atmosphere, and the impelling force is therefore that due to the difference between the pressure of the steam and the pressure of the atmosphere. In the condensing engine the steam, after having pressed the ...
— A Catechism of the Steam Engine • John Bourne

... the ranks were filled up immediately. As soon as the sun rose the factory chimney began to smoke, the hammer broke the stone, the file bit the metal, the plough furrowed the earth, the ovens were lighted, the pump worked its piston, the hatchet sounded in the wood, the locomotive moved amidst clouds of vapour, the cranes groaned on the wharves, the steamers cut the waters, and the little barks danced on the waves dragging their nets. None were absent from work's review. All hurried on, driven by the fear of hunger, defying ...
— The Shadow of the Cathedral • Vicente Blasco Ibanez

... our drive to Krugersdorp we left for Cape Town and England. We made the voyage on the old Roslin Castle. Always a slow boat, she had on this occasion, in sporting parlance, a "wing down," having broken a piston-rod on her way out from England, when we had vainly awaited her at Cape Town, and I think it was nearly three weeks before we landed at Plymouth. Again Randolph's African journey was brought back to my recollection. The captain of the Roslin Castle, Travers by name, ...
— South African Memories - Social, Warlike & Sporting From Diaries Written At The Time • Lady Sarah Wilson

... world was opened before his amazed eyes. The Saracen Young Woman and the rest all went to the wall; and when on April 7, 1842, he set out for Dresden he had different plans altogether in his head. Before he could start Schlesinger advanced the money for more cornet-a-piston arrangements of opera-airs, and he had to take the scores of those operas amongst ...
— Richard Wagner - Composer of Operas • John F. Runciman

... The tools of every artificer are of a construction the most simple that it should seem possible to make them, and yet each tool is so contrived as to answer several purposes. Thus, the bellows of the blacksmith, which is nothing more than a hollow cylinder of wood, with a valvular piston, beside blowing the fire, serves for his seat when set on end, and as a box to contain the rest of his tools. The barber's bamboo basket, that contains his apparatus, is also the seat for his customers. The joiner makes use of his rule as a walking stick, and the chest that ...
— Travels in China, Containing Descriptions, Observations, and Comparisons, Made and Collected in the Course of a Short Residence at the Imperial Palace of Yuen-Min-Yuen, and on a Subsequent Journey thr • John Barrow

... relief she had. He told her to wash it out thoroughly with the hot water, unscrew the top, and take out the piston. While giving his directions, he unbound the arm, enlarged the wound in the vein longitudinally, and re-bound the arm tight below the elbow, then quickly opened a vein of his own, and held the syringe to catch the spout that followed. ...
— Paul Faber, Surgeon • George MacDonald

... is heated, the water which is turned into steam, the piston on which the steam acts, the driving wheel, &c., &c., are all one as much as another a means whereby a train is made to go from one place to another; it is impossible to say that any one of them is the main means. So (mutatis mutandis) with modification. ...
— Evolution, Old & New - Or, the Theories of Buffon, Dr. Erasmus Darwin and Lamarck, - as compared with that of Charles Darwin • Samuel Butler

... firmly among the stones, piercing the cold silent crevices of the earth. Ay, indeed! The coal in the furnace, burning passively and hotly, is as much a force, though it but lies and suffers, as the energy that throbs in the leaping piston-rod or the rushing wheel. Not in success and noise and triumph does the soul grow; when the body rejoices, when the mind is prodigal of seed, the spirit sits within in a darkened chamber, like a folded ...
— The Altar Fire • Arthur Christopher Benson

... put down: 'La Favorita, complete arrangement for pianoforte, arrangement without words, for solo; ditto, for duet; complete arrangement for quartette; the same for two violins; ditto for a Cornet a piston. Total fee, frcs. 1100. Immediate advance in cash, frcs. 500.' I could see at a glance what an enormous amount of trouble this work would involve, but I did not hesitate a moment to ...
— My Life, Volume I • Richard Wagner

... Watt's indicator for steam engines the paper does not move with a constant velocity, but its displacement is proportional to that of the piston of the engine, while that of the tracing point is proportional to the pressure of the steam. Hence the co-ordinates of a point of the curve traced on the diagram represent the volume and the pressure of the steam in the cylinder. ...
— Encyclopaedia Britannica, 11th Edition, Volume 8, Slice 3 - "Destructors" to "Diameter" • Various

... he would, and she at once sat down before the little instrument. It was scarcely more to be compared with the magnificent machines of our day than the flageolets of Virgil's shepherds with the cornet-a-piston of the modern star performer, but Mozart, Haydn, Handel, or Beethoven never lived to see a better. It was only about two feet across by four and a half in width, with a small square sounding board at the end. The almost threadlike wires, strung on a wooden frame, gave forth a ...
— The Duke of Stockbridge • Edward Bellamy

... being tubular, is the favorite habitat of a very dangerous insect, which is rendered peculiarly ferocious by being boiled. The government of the island, therefore, never allows a stick of it to be exported without being accompanied by a piston with which its cavity may at any time be thoroughly swept out. These are commonly lost or stolen before the maccaroni arrives among us. It, therefore, always contains many of these insects, which, however, generally die of old age in the shops, so ...
— Little Masterpieces of American Wit and Humor - Volume I • Various

... the groove, the steam is cut off from the space between it and the main valve, which is fitted with packing rings and works over a latticed port. This port opens directly into the cylinder. The exhaust takes place chiefly through a port uncovered when the piston is approaching the end of its stroke. The remaining vapor left in the cylinder is exhausted under the lower edge of the main valve, until cushioning commences, and the steam from both upper and lower ports is discharged into ...
— Scientific American Supplement, No. 481, March 21, 1885 • Various

... Actual Horse-power of an engine, multiply the area of the cylinder in square inches by the average effective pressure in pounds per square inch, less 3 lb. per square inch as the frictional allowance, and also by the speed of the piston in feet per minute, dividing the product by 33,000, and the quotient will be ...
— Getting Gold • J. C. F. Johnson

... needle, and rolled back his left shirt-cuff. For some little time his eyes rested thoughtfully upon the sinewy forearm and wrist all dotted and scarred with innumerable puncture-marks. Finally he thrust the sharp point home, pressed down the tiny piston, and sank back into the velvet-lined arm-chair with a long ...
— The Sign of the Four • Arthur Conan Doyle

... bones in his cheeks, said:—"It don't make no odds to we, I take it." He was a prehistoric navvy, who had become a watchman, and was responsible for red lanterns hooked to posts on the edge of chasms to warn carts off. He was going to sleep in half a tent, soothed or otherwise by the unflagging piston of that donkey-engine, which had made up its mind to go ...
— When Ghost Meets Ghost • William Frend De Morgan

... singers, numbered about 50, and the melodious din they created was something tremendous. "Sam" had the arrangement of it. There were tenors, baritones, bass men, trebles, alto-singers, in the fullest feather; there were trumpeters, tromboners, bassooners, ophicleideans, cornet-a-piston players, and many others, all instrumentally armed to the very teeth, and the sensation they made, fairly shook and unnerved the more pious members of the congregation, who protested against the chapel being turned into a "concert-hall," &c. The music after all, was good, ...
— Our Churches and Chapels • Atticus

... Dartmouth; invented a steam-engine in which the piston was raised by steam and driven down by the atmosphere after the injection into the cylinder of a squirt of cold water, which cooled it, so that the steam when injected did not raise the piston at once up. By James Watt's invention of a ...
— The Nuttall Encyclopaedia - Being a Concise and Comprehensive Dictionary of General Knowledge • Edited by Rev. James Wood

... circulating pumps, steam and exhaust units in main engines; dry-firing boilers, and thus melting the tubes and distorting furnaces, together with easily detectable instances of a minor character, such as cutting piston and connecting rods and stays with hack saws, smashing engine-room telegraph systems, and removing and destroying parts which the Germans believed could not be duplicated. Then there was sabotage well concealed: ...
— Our Navy in the War • Lawrence Perry

... the anthers are here united in a tube, the pollen being discharged within. At the base of this anther-tube rises the pistil, which gradually elongates, and like a piston forces out the pollen at the top. Small insects in creeping over the cone quickly dislodge it. In the next stage the anthers have withered, the flower-tube elongated, and the top of the two-parted pistil begins to protrude, and at length expands its tips, ...
— My Studio Neighbors • William Hamilton Gibson

... bear in mind all this, is it possible not to connect the facts together, and to refer cycles of living generations to the same unalterableness in the action of like matter under like circumstances which makes Jupiter and Saturn revolve round the sun, or the piston of a steam-engine move up and down as long as ...
— Unconscious Memory • Samuel Butler

... related in a former chapter, it must be admitted that the corona is not without some functional office in the act of procreation. Its shape indicates a valve action like that of the valve in a syringe-piston, and if we examine the two extremes of these conditions of glans—one devoid of corona, as many are, and the other with the corona in its most pronounced form, when in a state of erection—the difference, either in the appearance of the two organs ...
— History of Circumcision from the Earliest Times to the Present - Moral and Physical Reasons for its Performance • Peter Charles Remondino

... swung his double-bitted axe into a dry hemlock, the keen blade sinking deeper and deeper into the tree with each successive stroke, made with the precision and rapidity of a piston, until the tree fell with a sweeping crash (it had been as smoothly severed as if by a saw) and the two soon had its full length cut up and piled near the shanty ...
— The Lady of Big Shanty • Frank Berkeley Smith

... clean and dry. 3. See that the barrel mouthpiece is tight. 4. See that small hole in gas regulator is to the rear. 5. Thoroughly oil all working parts, especially the cam slot and exterior of the bolt, and the striker post and piston. 6. Weigh and adjust the mainspring. 7. See that the mounting is firm. 8. Examine the magazines and ammunition. 9. See that the spare parts and oil reserve ...
— Military Instructors Manual • James P. Cole and Oliver Schoonmaker

... What has been said as to gunpowder presses applies still more to those for gun-cotton, although the latter are always hydraulic presses. Generally the pistons fit the mould perfectly, that is to say, they make aspiration like the piston of a pump. But there is no metal as yet known which for any length of time will stand the constant friction of compression, and after some time the mould will be wider in that part where the greatest compression takes place. The best metal for this purpose has proved to be a special steel made by ...
— Nitro-Explosives: A Practical Treatise • P. Gerald Sanford

... trade; with merely knowing that he must turn such and such a tap or valve in order to produce such and such a desired result: he wanted to see for himself how and why the engine did this or that, what was the use and object of piston and cylinder and crank and joint and condenser—in short, fully to understand the underlying principle of its construction. He took it to pieces for cleaning whenever it was needful; he made working models of it after his old childish pattern; he even ventured to tinker it up when ...
— Biographies of Working Men • Grant Allen

... upon wind and water his working capacity was very limited. But as soon as he passed over the border line from physics into chemistry and learned how to use the molecule, his efficiency in work and warfare was multiplied manifold. The molecular bombardment of the piston by steam or the gases of combustion runs his engines and propels his cars. The first man who wanted to kill another from a safe distance threw the stone by his arm's strength. David added to his arm the centrifugal ...
— Creative Chemistry - Descriptive of Recent Achievements in the Chemical Industries • Edwin E. Slosson

... Imagine the French Revolution, the Lutheran Reformation, the "Catholic" Reaction, and the like, to be revolutions of the vast human engine. Consider then the loss of power. Consider the impulse, the enormous impulse, applied to the piston, and then look at the result. What losses in leakages, in cooled enthusiasms, in friction-heat, in (pardon the ludicrous analogy) waste gases! Think, too, of the loss involved in unbalanced minds, as in unbalanced engines, one mass of bigoted inertia ...
— An Ocean Tramp • William McFee

... of freight across the ocean. The engines of the locomotive and the ship are worked by the push of steam. A fire is built under a boiler. The water is boiled; the steam is shut in; the only way the steam can get out is by pushing the piston ahead of it; the piston is attached to machinery that makes the locomotive or ...
— Common Science • Carleton W. Washburne

... communications to that learned body, and gained for its author the Telford premium and medal. In it he contended that a perfect engine would be one in which all the heat applied to the steam was used up in its expansion behind a working piston, leaving none to be sent into a condenser or the atmosphere, and that the best results in any actual engine would be attained by carrying expansion to the furthest possible limit, or, in practice, ...
— Heroes of the Telegraph • J. Munro

... but a mild form of this morbid affection, which, in its most intense degree, torments the sufferer from fever, (or one stunned by some sudden and violent grief,) when certain sounds, words, or tunes, accidentally determined, thrill through the head with the steadiness and vehement action of the piston of a steam-engine—beat, beat, beat!—every note seeming to fall on the excited brain like the blow of a hammer; while, as the fever and pain increase, the more rapidly and heavily do those torturing notes pursue their furious chase. We well remember, under an attack of disorder ...
— Blackwood's Edinburgh Magazine, Volume 59, No. 364, February 1846 • Various

... ordinary pop-gun. If I push the cork in very tight, and then force the piston slowly inwards, I can compress the air a good deal. Now I am forcing the atoms nearer and nearer together, but at last they rebel so strongly against being more crowded that the cork cannot resist their pressure. Out it ...
— The Fairy-Land of Science • Arabella B. Buckley

... of the Red Hand tips. From beyond the tips came the beat of a horse's hoofs, and the sound of human voices. Dick's first thought was of his pursuers, the troopers; his second of his escape; his third sent the blood surging through his veins and his heart beating like a piston. A grand thought, a magnificent thought! He could have cried out with exultation as it swept into his mind. Creeping around the tree he silently unearthed the gold-stealers' bag and dragged it after him, retreating to the quarry. At the edge of the incline he let the bag ...
— The Gold-Stealers - A Story of Waddy • Edward Dyson

... The cella contained one central and ten side niches, in which eleven masterpieces of Greek chisels were placed, namely, the Apollo and Hera, by Baton; Leto nursing Apollo and Artemis, by Euphranor; Asklepios and Hygieia, by Nikeratos; Ares and Hermes, by Piston; and Zeus, Athena, and Demeter, by Sthennis. The name of the sculptor of the Concordia in the apse is not known. Pliny speaks also of a picture by Theodoros, representing Cassandra; of four elephants, cut in obsidian, a miracle of skill ...
— Pagan and Christian Rome • Rodolfo Lanciani

... justice left in the world, that I imagine each individual would do well to contribute a moiety to the awfully slender public stock. Suppose you pay tithes to the extent of counting me out of this nest of persecutors? Thank Heaven! I am not a Palma! My soul does not work like the piston of a steam-engine,—is not regulated by a gauge-cock and safety-valve to prevent all explosions, to keep the even, steady, decorous, profitable tenor of its sternly politic way. I am a Neville. The blood in my veins is not 'blue' like the Palma's, but red,—and hot enough to keep my heart from ...
— Infelice • Augusta Jane Evans Wilson

... fireman, "We must oil our engine well." So they took oil cans with funny long noses and they oiled all the machinery, the piston-rods, the levers, the wheels, everything that moved or went round. And all the ...
— Here and Now Story Book - Two- to seven-year-olds • Lucy Sprague Mitchell

... An air pump operated by mercury. The mercury acts virtually as the piston, and the actuating force is the weight of the column of mercury, which must exceed thirty inches in height. There are many types. Mercurial air pumps are largely used for exhausting incandescent lamp chambers. (See Geissler Air Pump,—Sprengel ...
— The Standard Electrical Dictionary - A Popular Dictionary of Words and Terms Used in the Practice - of Electrical Engineering • T. O'Conor Slone

... "it's pairt o' the machine. What a body has to do is to learn what pinion or steam-box, or piston, or muckle water-wheel he represents, and stick to that, defyin' the deevil, whase wark is to put the machine out o' gear. And sae he maun grin' awa', and whan Deith comes, he'll say, as Andrew Wylie did—'Weel run, ...
— Alec Forbes of Howglen • George MacDonald

... the apparent physical bustle is true also of the apparent bustle of the intellect. Most of the machinery of modern language is labour-saving machinery; and it saves mental labour very much more than it ought. Scientific phrases are used like scientific wheels and piston-rods to make swifter and smoother yet the path of the comfortable. Long words go rattling by us like long railway trains. We know they are carrying thousands who are too tired or too indolent to walk and think for ...
— Orthodoxy • G. K. Chesterton

... rearranges her parure and smoothes her ruffled lace; while Mademoiselle pouts a little, then studies her card for the next waltzer. Senator Jenks takes his "nip" just a trifle more regularly; and Blobb, of Oregon, draws a longer breath before his next period. As for the lobby-pump, its piston grows red-hot and its valves fly wide open, with the work it does; while thicker and more foul are the ...
— Four Years in Rebel Capitals - An Inside View of Life in the Southern Confederacy from Birth to Death • T. C. DeLeon

... Then, for involuntarily he now did everything running, with a dash up the steps he seized the sullen pendant bell-handle, and worked it pumpwise, till he perceived a smaller bell-knob beside the door, at which he worked piston-wise. Pump and piston, the hurly-burly and the tinkler created an alarm to scare cat and mouse and Cardinal spider, all that run or weave in desolate houses, with the good result of a certain degree of heat to his frame. He ceased, panting. No stir within, nor light. That white stare ...
— The Shaving of Shagpat • George Meredith

... like the piston of a pump. It vanished and reappeared and a plane came off. Men in vividly-colored suits swarmed about it, and the elevator was descending again. The plane roared, shot down the deck, and was gone to form one of the string of climbing objects which grew smaller ...
— The Invaders • William Fitzgerald Jenkins

... seemed to have grown shorter and fatter, and were encased in black fur gloves. He felt a desire to walk on all fours—tried it—did it. It was very odd—the movement of the arms straight from the shoulder, more like the movement of the piston of an engine than anything Maurice could think ...
— The Magic World • Edith Nesbit

... energized on that side. One of these magnets closes an exhaust-valve, and the other opens an inlet-valve, in the compressed air tank. At once air is forced into this double cylinder, which you see at the bottom of the stabilizer, filling the half which is to operate its own set of rudders; and a piston begins to work inside. The piston is connected to a toothed rack, as you will note, causing this to turn a sector engaging it. The control wires ...
— Around the World in Ten Days • Chelsea Curtis Fraser

... force it in. If we did not pump it out, it would soon build up pressure enough to penetrate the interior wall. Now, since the stuff can leak through any material, what kind of a pump shall we use? It won't be pushed by a piston, for it will leak through either the cylinder walls or the piston. A centrifugal pump would be equally ineffective. A mercury vapor pump will take it out, of course, and keep a high vacuum, but we'd never ...
— The Black Star Passes • John W Campbell

... What is the figure representing the acceleration of the motion of a piston, controlled by a crank which revolves with a uniform velocity? I stated it to be a right-angled triangle, and indicated, as I supposed, clearly enough, a simple method by which this could be shown. Your correspondent claims that the calculation, according ...
— Scientific American, Volume XXIV., No. 12, March 18, 1871 • Various

... day passed without a shock. Ursula sat playing on her piano till very late; and went to bed easier in mind and very sleepy. About midnight she was awakened by the music of a band composed of a clarinet, hautboy, flute, cornet a piston, trombone, bassoon, flageolet, and triangle. All the neighbours were at their windows. The poor girl, already frightened at seeing the people in the street, received a dreadful shock as she heard the coarse, rough voice of a man proclaiming in loud tones: ...
— Ursula • Honore de Balzac

... leave no marks on the wall that may arouse attention," he said, and taking the full syringe to the arch over the torrent, and placing the candle on the floor beside him, he gently pushed in the piston. The spray struck the rock, and the rock dissolved slightly but perceptibly. Coming back to the table he stood for a few minutes in deep thought. Although the cot bed was fixed to the floor, and although it was possible that the shelf in the next cell ...
— A Rock in the Baltic • Robert Barr

... reservoir diminishes the cut-off is delayed so that a larger quantity of air is admitted to the small cylinder; and when the pressure in the reservoir is so far reduced that the pressure on the smaller piston gives very little power, the supply passages are kept open so that the air acts directly on the piston of the larger cylinder. This arrangement is also available when the air pressure is high and great power is required ...
— Scientific American, Volume XLIII., No. 25, December 18, 1880 • Various

... arms rising and falling with a strong, regular motion, like the piston of a steam-engine. She did not even turn her head, but dusting a little flour on to the dough, went straight ...
— Eyebright - A Story • Susan Coolidge

... working on a motor which is said to possess great possibilities in this line. Its distinctive features include a connecting rod much shorter than usual, and a crank shaft located the length of the crank from the central axis of the cylinder. This has the effect of increasing the piston stroke, and also of increasing the proportion of the crank circle during which effective pressure is applied to ...
— Flying Machines - Construction and Operation • W.J. Jackman and Thos. H. Russell

... Yokohama to San Francisco belonged to the Pacific Mail Steamship Company, and was named the General Grant. She was a large paddle-wheel steamer of two thousand five hundred tons; well equipped and very fast. The massive walking-beam rose and fell above the deck; at one end a piston-rod worked up and down; and at the other was a connecting-rod which, in changing the rectilinear motion to a circular one, was directly connected with the shaft of the paddles. The General Grant was rigged with three masts, giving a large capacity ...
— Around the World in 80 Days • Jules Verne

... "With very rare exceptions," cries Maitre, a French Catholic, "the most undisguised materialism has everywhere replaced the lessons and recollections of the spiritual life. The shrill voice of machinery, the grinding of the saw or the monotonous clank of the piston, is heard now, where once were heard chants and prayers and confessions. Once the monk freely undid the door to let the stranger in, and now we see a sign, 'no admittance,' lest a greedy rival purloin the tricks of trade." Montalembert, referring to the ruin of the cloisters ...
— A Short History of Monks and Monasteries • Alfred Wesley Wishart

... them with more fire, and run them into bars convenient for use. Our bellows," continued the guide, "are not like yours, with two boards and leather between. The rats would soon make short work with these. They are two cylinders formed from the trunk of a tree, with a piston in each, packed with coarse cloth, and having valves. An old musket-barrel carries the air to the furnace, and, by pumping them time about, the blow is ...
— The Fugitives - The Tyrant Queen of Madagascar • R.M. Ballantyne

... demonstrate the soundness of the principle on which it was constructed. It was supported on three wheels, and carried a small copper boiler, heated by a spirit lamp, with a flue passing obliquely through it. The cylinder, of 3/4 inch diameter and 2-inch stroke, was fixed in the top of the boiler, the piston-rod being connected with the vibratory beam attached to the connecting-rod which worked the crank of the driving-wheel. This little engine worked by the expansive force of steam only, which was discharged into the atmosphere after it had done its work of alternately ...
— Men of Invention and Industry • Samuel Smiles

... a cam instead of an eccentric is to enable the opening of the valves abruptly at the beginning of the piston stroke, maintaining a uniform steam-port opening during nearly the entire length of stroke, and as abruptly closing the valves at the termination of ...
— Mechanical Drawing Self-Taught • Joshua Rose

... he talked. But it was their very strength, he saw, that made them tender; the appalling power of the machine, which even now he felt that he but half understood, was the very thing that made it run so smoothly. It had the horror of a perfectly controlled steel piston that moves as delicately ...
— Dawn of All • Robert Hugh Benson

... it takes it to traverse the remaining few inches to the muzzle, a certain portion of the enclosed gas is forced through this hole, where it is "trapped," in a small "gas-chamber" and its force directed against a piston or lever which, being connected with the necessary working parts of the gun by cams, links or ratchets, performs the functions of removing and ejecting the empty cartridge case, withdrawing a new cartridge from the belt, clip or magazine, and "cocking" ...
— The Emma Gees • Herbert Wes McBride

... imagine a piston in a cylinder, forced upwards when the steam is heated, and falling downwards when the steam is cooled. Next fancy this upward and downward motion regulated by a number of wheels and cranks that turn two wheels on each side of the ship, keeping ...
— Willis the Pilot • Paul Adrien

... feet beam, and 20 feet deep. Sides were 4 feet 10 inches thick, and the ends of the hull were rounded and alike. There were two rudders at each end, one on each hull, alongside the race. The eight paddle blades, each 14-1/2 feet by 3 feet, turned in either direction by stopping the engine piston at half-stroke and reversing the flow of steam. Rigged with two lateen sails and two jibs, the ship sailed either end first. The engine of 120 hp was in one hull and two boilers were in the other. Other sources, Marestier, and Colden in Proces-verbaux ...
— Fulton's "Steam Battery": Blockship and Catamaran • Howard I. Chapelle

... white streak it seemed to be caught in a complex network of steel. He turned one thrust, turned another, turned another. Then suddenly he went forward at the lunge with his whole living weight. Turnbull leaped back, but Evan lunged and lunged and lunged again like a devilish piston rod or battering ram. And high above all the sound of the struggle there broke into the silent evening a bellowing human voice, nasal, raucous, at the highest pitch of pain. "Help! Help! Police! Murder! Murder!" The gag was broken; and the ...
— The Ball and The Cross • G.K. Chesterton

... all the soul of the young engineer swelling to the surface. "Take this piston, sir, and examine it. Could such a job have been done, unless by sheer ...
— The Submarine Boys and the Middies - The Prize Detail at Annapolis • Victor G. Durham

... from Dick, easily and quickly thrust the needle through the stretched skin, with steady hand sank the piston home, and with the ball of the finger soothingly rubbed ...
— The Little Lady of the Big House • Jack London

... therefore of greater density, throughout its operation. Even then, however, the amount of operative heat is very small in comparison with that which passes through the steam-engine, per cubic foot swept through by the piston, for the change of state which water undergoes in its transformation into steam involves the taking in of much more heat than can be communicated to air in changing its temperature within such a range as is practicable. Another and not less serious objection is the practical difficulty of getting ...
— Project Gutenberg Encyclopedia

... Mercator, of map projection fame, was a Fleming named Kremer, i.e. dealer.] the two languages being represented by those important tradesmen Baker and Butcher. The former is reinforced by Bollinger, Fr. boulanger, Pester, Old Fr. pestour (Lat. piston), and Furner— ...
— The Romance of Names • Ernest Weekley

... the professor came dashing toward the camp, his arms were outstretched as if in entreaty, and his long legs going up and down like piston rods, at such speed ...
— The Boy Aviators' Polar Dash - Or - Facing Death in the Antarctic • Captain Wilbur Lawton

... in the waste-pipe. Then he extinguished the fire and let the furnace cool, and when Dorothy entered the workshop for the last time to take her mournful leave of the place, there lay the bones of the mighty creature scattered over the floor—here a pipe, there a valve, here a piston and there a cock. Nothing stood but the furnace and the great pipes that ran up the grooves in the wall outside, between which there was scarce a hint ...
— St. George and St. Michael • George MacDonald

... to give the proper amount of lead, and the desired release and compression, and the expansion valve is operated by a separate eccentric fastened in line with or 180 deg. ahead of the crank. When the piston, therefore, commences to move from the crank end to open the port, D, the expansion valve is forced by its eccentric in the opposite direction, and is closing the steam port and would have closed it before ...
— Scientific American Supplement, No. 787, January 31, 1891 • Various

... mile in diameter was this shaft, and ringed regularly along its height by wide amethystine bands—like rings of a hollow piston. They were, in color, replicas of that I had glimpsed before our descent into this place and against whose gleaming cataracts the outlines of the incredible city had lowered. And they were in motion, ...
— The Metal Monster • A. Merritt

... the power of the reversed pressure against her piston, seemed to buck upon the tracks. She stopped as though she had come to the end of ...
— Tom of the Raiders • Austin Bishop

... took the young men to London; his lordship driving, and the servants sitting inside. Jack sat behind with the two grooms, and tooted on a cornet-a-piston in the most melancholy manner. He partook of no refreshment on the road. His silence at his clubs was remarked: smoking, billiards, military duties, and this and that, roused him a little, and presently Jack was alive again. But then came the season, Lady Clara Pulleyn's first season in London, ...
— The Newcomes • William Makepeace Thackeray

... for she turned away a few steps and then looked at him pleadingly, standing with her jaws open, and her long dripping tongue working like a piston over her white fangs. ...
— Kiddie the Scout • Robert Leighton

... breeze caught and carried them away. The sight alone would suffice to inspire terror, without the oppressive smoke and the uncanny noise far down in the depths. Dull and regular, it sounded like the piston of an engine or a great drum, heard through the noises of a factory. Presently there was silence, and then, without any warning, came a tearing crack, the thunder as of 100 heavy guns, a metallic din, and a cloud of smoke rose; and while we forced ourselves to stay ...
— Two Years with the Natives in the Western Pacific • Felix Speiser

... during the experiments; and further evidence is found in the fact that the engines he ordered of Messrs. Boulton and Watt for the "Clermont" were precisely of the same dimensions as those in the "Charlotte Dundas," with the exception of two inches more diameter in the piston; and the patent of Fulton dates from 1809—twenty years after Symington had propelled a boat by steam on Lake Dalswinton, and eight years after he had himself taken sketches of Symington's engines in the Forth and ...
— Lands of the Slave and the Free - Cuba, The United States, and Canada • Henry A. Murray

... the edge of the bed, and began dressing. Slowly one thing after another began to dawn on him. His head throbbed like a piston rod—headache! He heard peculiar sounds: chattering women, hoarse rough laughter, oaths—and from outside came the peal of church bells. Through all the noise and tobacco smoke came visions of a fair fringe, and soft red lips—the princess! ...
— Ditte: Girl Alive! • Martin Andersen Nexo

... force of chemical affinity breaks up the chemical composition of the coal, how the heat thus liberated is applied to the water to vapourize it; how the vapour is collected in the boiler under pressure; how this pressure is applied to the piston in the cylinder, and how this finally results in the revolution of the fly-wheel. It is true that we do not understand the underlying forces of chemism, etc., but these forces certainly exist and are the foundation of science. But the mechanism of the engine ...
— The Story of the Living Machine • H. W. Conn

... accents of transoceanic celebrities and Eleanor Roosevelt. There they competed on alternate forums with literate gardeners and stuttering horticultural amateurs. Stolon, rhizome and culm became words replacing crankshaft and piston in the popular vocabulary; the puerile reports Gootes fabricated under my name as the man responsible for the phenomenon were syndicated in newspapers from coast to coast, and a query as to rates was received from ...
— Greener Than You Think • Ward Moore

... akno. pin : pinglo, pinglefiksi. pincers : prenilo. pinch : pincxi. pine : pino; konsumigxi. "-apple," ananaso. pink : rozkolora; dianto. pioneer : pioniro. pipe : tubo, pipo; (mus.) sxalmo. pistol : pistol'o, -eto. piston : pisxto. pit : kavo, fosajxo, (well) puto; (theatre) partero. pitch : pecxo, bitumo; tono. pitcher : krucxo. pity : kompati. ("a-"), domagxo. pivot : pivoto, akso. placard : afisxo, place : loko; meti. plague : turmenti, inciteti; pesto. plait : plekti, har'ligo, -plektajxo, plan : plano, projekto, ...
— The Esperanto Teacher - A Simple Course for Non-Grammarians • Helen Fryer

... sir," he said; "to my mind something has happened to the machinery. Either the shaft or the piston rod is broken, and they cannot get the screw to work. The commander, of course, did not like to remain in the bay, with the chance of a hurricane blowing right into it; and so he got up the steam, and was probably standing ...
— The Three Admirals • W.H.G. Kingston

... slowly on the cloth And sweaty fingers slacken And hair falls in damp wisps over the eyes— Sped by some power within, Sadie quivers like a rod... A thin black piston flying, One ...
— The Ghetto and Other Poems • Lola Ridge

... by a pop-gun, some ten feet in diameter, charged with mephitic vapours and plugged with microbes of typhoid fever. Conceive your sensations when you were aware that the piston was being driven home. ...
— In Troubadour-Land - A Ramble in Provence and Languedoc • S. Baring-Gould



Words linked to "Piston" :   plunger, piston rod, piston ring, reciprocating engine, composer



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