The high-pressure steam engine investigated, tr. with notes by W. Pole1848 - 80 pages |
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Expressions et termes fréquents
action adopted advantage allow already apparatus appears application arrangement attention Author become boiler cast iron cause chimney circumstances cleaning condition connecting considerable construction copper cover cylinder danger deposit diameter easily effect elasticity equal especially experience exposed feed feet fire fixed flues former friction front fuel furnace give given greater heart heat high-pressure engine important improvement inches increase iron joint kind latter lead least length less lever lower machine manner means metal motion necessary never objection opening ordinary oscillating packing pass perfectly pipe piston plate position possible practice prefer pressure prevent principle produce proper proportion pump receivers remarked removed round rules screwed secure separators shown side simple space square steam stroke strong supply surface thick tight tubes upper usually valve vessels weight whole
Fréquemment cités
Page 74 - The requisites in the use of the tubes are the following: — They must be placed in such a position, with regard to the furnace, that the flame may act upon them in the most favourable manner, and that the heat may be absorbed as completely as possible. — They must have such a proportion between their length and diameter, that neither the ebullition in them may become too violent, and the water be thereby ejected from them, nor that they become warped or made crooked by the heat. — They must...
Page xii - And if I have done well, and as is fitting the story, it is that which I desired: but if slenderly and meanly, it is that which I could attain unto.
Page i - The High-Pressure Steam Engine. THE HIGH-PRESSURE STEAM ENGINE ; an Exposition of its Comparative Merits, and an Essay towards an Improved System of Construction, adapted especially to secure Safety and Economy. By Dr. ERNST ALBAN, Practical Machine Maker, Plau, Mecklenberg. Translated from the German, with Notes, by Dr. POLE, FRS, M.
Page 207 - In such cases or constructions as may render it more desirable to fix the boiler with its chimney and other apparatus, and to place the cylinder out of the boiler, the cylinder itself may be suspended for the same purpose upon trunnions or pivots in the same manner, one or both of which trunnions or pivots may IHJ perforated so as to admit the introduction and escape of the steam, or its condensation as before mentioned.
Page v - ... experience, of those who have done more ; and it is on this ground we invite attention to the following pages. It must startle English Engineers not a little to be told that «,* the high-pressure engine is both safer and more economical in its use than the low-pressure condensing one...
Page 242 - Practical considerations form the best guide, and these are often left entirely out of view by mere mathematicians.
Page 74 - They must have such a proportion between their length and diameter, that neither the ebullition in them may become too violent, and the water be thereby ejected from them, nor that they become warped or made crooked by the heat. — They must properly convey away all the generated steam, and be regularly supplied with water. — They must be connected with the main part of the boiler in such a manner, that in case of a rupture of one of them, the whole content of water and steam cannot suddenly and...
Page 36 - ... necessary in order to produce a sufficient draught in the chimney, but my experience has shown me that a much less temperature will answer the purpose; and if this assertion were true it would evidently get rid of the objection we are considering, since low-pressure engines must then be subject to a...
Page 107 - Papin's claim therefore is not to the valve itself, but to its improvement, or rather to the mode of applying it by means of a lever and moveable weight ; thereby not only preventing the valve from being blown entirely out of its place, but regulating the pressure at will, and rendering the device of universal application.
Page 43 - TR. be considered, because the surface of the piston becomes proportionately less as the elasticity is increased, and therefore the loss of the vacuum is less to be felt ; while the advantages of the system are increased by such increase of elasticity. When the pressure used is too low, for example, only two or three atmospheres, as is most common, the loss may be important, and the advantages of the highpressure system are not sufficiently developed to cover it. For instance, an engine of 10-horse...