History and Progress of the Steam Engine: With a Practical Investigation of Its Structure and ApplicationT. Kelly, 1829 - 859 من الصفحات |
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عبارات ومصطلحات مألوفة
admitted aperture apparatus applied atmosphere attached axis axle bars beam boiler bottom carriage cause centre chimney circular coal cock communication condenser connected connecting rod construction crank cylinder descend described diameter eduction effect elastic equal escape expansion experiments feet fire fixed flue fluid fly-wheel force friction fuel furnace groove heat hole hollow horizontal improvements inch inches of mercury inclined plane injection invention iron Jacob Perkins latent heat lever liquid Liverpool London lower machine machinery means metal moving packing paddle-wheel paddles pass passage patent piston rod placed plate pounds pressure prevent produced propelling pump purpose quantity rail rail-way represents revolving ring Rotary Engine rotatory round screwed shaft shut side sliders sliding smoke space steam boats steam engine steam pipe stroke stuffing box supply surface temperature tion tube turned upper vacuum valve vapour velocity vertical Watt weight wheel
مقاطع مشهورة
الصفحة 9 - One vessel of water rarefied by fire driveth up forty of cold water ; and a man that tends the work is but to turn two cocks, that, one vessel of water being consumed, another begins to force and refill with cold water, and so successively, the fire being tended and kept constant, which the selfsame person may likewise abundantly perform in the interim, between the necessity of turning the said cocks.
الصفحة 81 - 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.
الصفحة 9 - ... which is but at such a distance. But this way hath no bounder, if the vessels be strong enough ; for I have taken a piece of a whole cannon, whereof the end was burst, and filled it three...
الصفحة 50 - ... cooled the cylinder so much, as to require quantities of steam to heat it again, out of proportion to the power gained by having made a more perfect vacuum ; and on this account the old engineers acted wisely in loading the engine with only six or seven pounds weight on each square inch of the piston.
الصفحة 48 - Papin's digester, and formed a species of steam-engine by fixing upon it a syringe, one-third of an inch diameter, with a solid piston, and furnished also with a cock to admit the steam from the digester, or shut it off at pleasure, as well as to open a communication from the inside of the syringe to the open air, by which the steam contained in the syringe might escape. When the communication between the digester and syringe was opened, the steam entered the syringe, and by its action upon the piston...
الصفحة 584 - Liverpool, setting forth that they considered " the present establishments for the transport of goods quite inadequate, and that a new line of conveyance has become absolutely necessary to conduct the increasing trade of the country with speed, certainty, and economy.
الصفحة 312 - I believe it may be made very useful to ships, but I dare not meddle with that matter; and leave it to the judgment of those who are the best judges of maritime affairs;" and he further remarks, " As for fixing the Engines in Ships, when they 1698.
الصفحة 9 - An admirable and most forcible way to drive up water by fire, not by drawing or sucking it upwards, for that must be as the philosopher calleth it, infra spheeram activitatis, which is but at such a distance. But this way hath no bounder, if the vessels be strong enough ; for I have taken a piece of a whole cannon, whereof the end was burst, and filled it...
الصفحة 747 - In some cases after the flame has passed through the burning fuel I cause it to pass through a very hot funnel, flue, or oven, before it comes to the bottom of the boiler, or to the part of the furnace where it is proposed to melt metal or perform other office, by which means the smoke is still more effectually consumed. In other cases I cause the flame to pass immediately from the fire-place into the space under a boiler, or into the bed of a melting or other furnace.
الصفحة 594 - 7th. — The engine to be delivered complete for trial, at the Liverpool end of the railway, not later than the 1st. of October next. " 8th. — The price of the engine which may be accepted, not to exceed ^550. delivered on the railway; and any engine not approved, to be taken back by the owner. " NB — The Railway Company will provide the engine tender with a supply of water and fuel for the experiment. The distance within the rails is four feet eight inches and a half.