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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Aaron Manby action advantage allow apparatus arrangement atmospheres become bolts cast iron cause chimney circumstances cistern cleaning cock condensation connecting considerable construction copper Cornish Engine cover cylinder danger defects deposit diameter durable easily ebullition elasticity evaporation experience explosion favourable feed water feed-pump feet fire flanches flues friction fuel furnace give grease greater groove gudgeon Güstrow heart heating surface hemp packing high-pressure engine high-pressure steam inches increased joints kind latter less lever liable low-pressure engines lower machine manometer masonry metallic pistons motion Mulhausen necessary objection Oliver Evans opening oscillating engine pass perfectly pipe piston-rod possible pressure engines prevent principle proportion pump quantity rience riveted rows safety-valve screwed secure separators sides soldered space square steam engine steam-tight stroke strong stuffing-box supply temperature thereby thick tight tion trunnions tubes tubular boilers upper valve vessels water level weight whole wrought iron
Page vi - 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 99 - ... 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 201 - 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 68 - 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 236 - Practical considerations form the best guide, and these are often left entirely out of view by mere mathematicians.
Page 68 - 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 99 - 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 24 - ... 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.