History and Progress of the Steam Engine: With a Practical Investigation of Its Structure and ApplicationT. Kelly, 1829 - 859 σελίδες |
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Σελίδα 10
... less so than Dr. Brewster's corrections , who reads : " One vessel of water being con- sumed , another begins to force , and then to fill itself with cold water ; " or than the author of Stewart's History of the Steam Engine , who , in ...
... less so than Dr. Brewster's corrections , who reads : " One vessel of water being con- sumed , another begins to force , and then to fill itself with cold water ; " or than the author of Stewart's History of the Steam Engine , who , in ...
Σελίδα 26
... of the steam , being nearer the surface of the cylinder , would be more readily condensed ; and , in consequence , that a less quantity of injection water would serve the cylinder , which would itself be more 26 BEIGHTON'S HAND - GEAR .
... of the steam , being nearer the surface of the cylinder , would be more readily condensed ; and , in consequence , that a less quantity of injection water would serve the cylinder , which would itself be more 26 BEIGHTON'S HAND - GEAR .
Σελίδα 27
... less injection water than common , although the injection pump was calculated to afford as much injection water as ... less coals ; took less injection water ; the cylinder became hot , and the injection water came out at 180 ° of ...
... less injection water than common , although the injection pump was calculated to afford as much injection water as ... less coals ; took less injection water ; the cylinder became hot , and the injection water came out at 180 ° of ...
Σελίδα 43
... area of the piston will be smaller in the same proportion as the force is increased , in order to produce a given effect ; therefore , the edges of the piston being reduced also , there will be less ECONOMY OF HIGH - PRESSURE ENGINES . 43.
... area of the piston will be smaller in the same proportion as the force is increased , in order to produce a given effect ; therefore , the edges of the piston being reduced also , there will be less ECONOMY OF HIGH - PRESSURE ENGINES . 43.
Σελίδα 44
... less rubbing surface than in the other . Hitherto , steam had been only employed in raising water , nor had any plan been devised by which it could be adapted to imparting motion to machinery ; Savery , indeed , says his machine might ...
... less rubbing surface than in the other . Hitherto , steam had been only employed in raising water , nor had any plan been devised by which it could be adapted to imparting motion to machinery ; Savery , indeed , says his machine might ...
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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
Δημοφιλή αποσπάσματα
Σελίδα 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.
Σελίδα 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.
Σελίδα 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...
Σελίδα 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.
Σελίδα 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...
Σελίδα 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.
Σελίδα 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.
Σελίδα 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...
Σελίδα 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.
Σελίδα 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.