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 in Its Use
J. Weale, 1848 - 296 pages
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The High-pressure Steam Engine: An Exposition of Its Comparative Merits, and ...
Affichage du livre entier - 1848
Expressions et termes fréquents
action adopted advantage allow already apparatus appears applied arrangement atmospheres attended Author become boiler cast cause chimney circumstances cleaning condition connecting considerable construction copper cover cylinder danger deposit diameter difficulty easily effect elasticity equal especially evaporation experience explosion feet fire fixed flues former friction fuel furnace give given greater heart heat high-pressure engine important improvement inches increased iron joints kind latter lead least length less lower machine manner means metal motion necessary never objection opening oscillating packing pass perfectly pipe piston plate possible practice pressure prevent principle produce proper proportion pump quantity receivers reference remain remarked removed round rules screwed secure separators shown side simple space square steam stroke strong supply surface temperature thick tight tubes turned upper usually valve vessels weight whole
Page viii - 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 101 - ... preventing the explosion of vessels as those mentioned by Glauber. Speaking of the action of such safety-valves he observes, (page 7) " upon the top of a stopple [valve] there may be fastened some lead, that if the spirit be too strong, it will only heave up the stopple and let it fall down again." 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...
Page 203 - 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 i - ... 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 70 - 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 238 - Practical considerations form the best guide, and these are often left entirely out of view by mere mathematicians.
Page 70 - 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 101 - English writers of his great merits, and their generously expressing regret that his attention should have been diverted when he was so near realizing the most splendid reward. His name is however inseparably connected with the steamengine, and as long as the safety-valve shall be used the world will be his debtor. It should not however be supposed that safety-valves were wholly unknown before Papin's time ; on the contrary, they were frequently used, although this fact has not been noticed by any...
Page 26 - ... and therefore a greater thickness of metal is necessary to produce an equal strength ; but since copper boilers never fly in pieces in case of explosion, it is not necessary to be too scrupulous in regard to this point. Even when the metal is thin, especially if the diameter is not great, the use of copper removes all danger of destructive explosion, since at most only a simple tearing asunder of the metal will ensue.