Pumping engines for water works

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McGraw Publishing Company, 1907 - 372 Seiten
 

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Seite 15 - I call the steam vessel, must, during the whole time the engine is at work, be kept as hot as the steam that enters it; first, by inclosing it in a case of wood, or any other materials that transmit heat slowly; secondly, by surrounding it with steam or other heated bodies; and thirdly, by suffering neither water nor any other substance colder than the steam, to enter or touch it during that time.
Seite 15 - Fourthly, I intend, in many cases, to employ the expansive force of steam to press on the pistons, or whatever may be used instead of them, in the same manner as the pressure of the atmosphere is now employed in common fire engines.
Seite 19 - THOSE WHO BEST DESERVE THEIR GRATITUDE, THE KING, HIS MINISTERS, AND MANY OF THE NOBLES AND COMMONERS OF THE REALM, RAISED THIS MONUMENT TO JAMES WATT, WHO, DIRECTING THE FORCE OF AN ORIGINAL GENIUS, EARLY EXERCISED IN PHILOSOPHIC RESEARCH, TO THE IMPROVEMENT OF THE STEAM-ENGINE, ENLARGED THE RESOURCES OF HIS COUNTRY, INCREASED THE POWER OF MAN, AND ROSE TO AN EMINENT PLACE AMONG THE MOST ILLUSTRIOUS FOLLOWERS OF SCIENCE AND THE REAL BENEFACTORS OF THE WORLD.
Seite 15 - Sixthly, — I intend, in some cases, to apply a degree of cold not capable of reducing the steam to water, but of contracting it considerably, so that the engines shall be worked by the alternate expansion and contraction of the steam. Lastly, — instead of using water to render the piston or other parts of the engines air and steam tight, I employ oils, wax, resinous bodies, fat of animals, quicksilver, and other metals, in their fluid state.
Seite 15 - Secondly : In engines that are to be worked wholly or partially by condensation of steam, the steam is to be condensed in vessels distinct from the steam vessels or cylinders, although occasionally communicating with them ; these vessels I call condensers ; and, whilst the engines are working, these condensers ought at least to be kept as cold as the air in the neighborhood of the engines, by application of water or other cold bodies. "Thirdly : Whatever air or other elastic vapor is not condensed...
Seite 15 - I intend, in many cases, to employ the expansive force of steam to press on the pistons, or whatever may be used instead of them, in the same manner as the pressure of the atmosphere is now employed in common fire-engines. In cases where cold water cannot be had in plenty, the engines may be wrought by this force of steam only, by discharging the steam into the open air after it has done its office.
Seite 19 - Who best deserve their gratitude, The King, His Ministers, and many of the Nobles and Commoners of the Realm, Raised this Monument to JAMES WATT, Who directing the Force of an Original Genius Early exercised in Philosophic Research To the Improvement of The Steam Engine, Enlarged the Resources of his Country, Increased the Power of Man, And rose to an Eminent Place Among the most illustrious Followers of Science, And the real Benefactors of the World.
Seite 15 - Thirdly, whatever air or other elastic vapour is not condensed by the cold of the condenser, and may impede the working of the engine, is to be drawn out of the steam vessels, or condensers, by means of pumps, wrought by the engines themselves, or otherwise.
Seite 47 - Law. — The temperature remaining the same, the volume of a given quantity of gas varies inversely as the pressure.
Seite 353 - The British thermal unit is the amount of heat which will raise the temperature of one pound of water one degree of the Fahrenheit scale.

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