The Steam Engine: Comprising an Account of Its Invention and Progressive Improvement, Volume 2,Partie 1J. Taylor, 1827 - 370 pages |
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Page 14
... less simple than the crank , but it appears to have been the first attempt , and was done in the following manner : Let a , b , c , be three wheels on one axis , and d , e , two wheels loose on another axis A , with ratchets , so as to ...
... less simple than the crank , but it appears to have been the first attempt , and was done in the following manner : Let a , b , c , be three wheels on one axis , and d , e , two wheels loose on another axis A , with ratchets , so as to ...
Page 17
... less than the steam , would condense a part of it again into water , and hence , the quantity could not be ascertained which would exclude the air out of a given space , which was the chief end of the experiment . In this experiment he ...
... less than the steam , would condense a part of it again into water , and hence , the quantity could not be ascertained which would exclude the air out of a given space , which was the chief end of the experiment . In this experiment he ...
Page 19
... less ratio than its area . The result of his whole reasoning is in favour of a short cylinder , and it must be allowed to be ingenious ; but the proper question is , What form of cylinder will enable us to do the most work with the ...
... less ratio than its area . The result of his whole reasoning is in favour of a short cylinder , and it must be allowed to be ingenious ; but the proper question is , What form of cylinder will enable us to do the most work with the ...
Page 30
... less as the elastic force was greater or less . 1782. Marquis De Jouffroy , 34. - The idea of employing the steam engine to propel vessels , which had been suggested by Hulls , ( art . 14 , ) was first tried in practice by the Marquis ...
... less as the elastic force was greater or less . 1782. Marquis De Jouffroy , 34. - The idea of employing the steam engine to propel vessels , which had been suggested by Hulls , ( art . 14 , ) was first tried in practice by the Marquis ...
Page 36
... less , and also when reduced to 6.1 lbs . it did somewhat less ; and he does not recommend a greater load than six and a quarter or six and a half pounds . † The engine had a sixty - one inch cylinder , and made twelve strokes , of ...
... less , and also when reduced to 6.1 lbs . it did somewhat less ; and he does not recommend a greater load than six and a quarter or six and a half pounds . † The engine had a sixty - one inch cylinder , and made twelve strokes , of ...
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Expressions et termes fréquents
acting action air pump aperture applied axis beam boiler boiling bottom Boulton and Watt Carbon cast iron chimney circular inch coal cock column condenser construction crank cubic feet cubic foot cylinder degree density diameter double acting double engine effect elastic force equal expansion experiments feet per minute fire flue fluid force of steam friction fuel half hence high pressure horse power Hydrogen inches of mercury increase injection length less lever liquid load low pressure steam means metal method mode motion move multiplied nearly paddles passage piston rod Plate pounds per circular proportion quantity of heat raised one foot raising water regulated render resistance safety valve shaft shew shewn slide specific specific gravity square root steam engine steam pipe stroke stuffing box surface temperature throttle valve tube Ure's vapour velocity vessel volume Watt weight wheel
Fréquemment cités
Page xix - 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...
Page 20 - I call the steam vessel, must, during the whole time the engine is at work, be kept as hot as the steam that enters it ; first, by inclosing it in a case of wood, or any other materials that transmit heat slowly; secondly, by surrounding it with steam or other heated bodies; and thirdly, by suffering neither water nor any other substance colder than the steam to enter or touch it during that time.
Page xx - I have seen the water run like a constant fountain stream forty feet high. 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 self same person may likewise abundantly perform in the interim, between the necessity of turning the said cocks.
Page xx - ... 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 re-fill with cold water, and so successively, the fire being tended and kept constant, which the self-same person may likewise abundantly perform in the interim, between the necessity of turning the said cocks.
Page 11 - A Description and Draught of a new-invented Machine, for carrying Vessels or Ships out of, or into, any Harbour, Port, or River, against Wind and Tide, or in a calm.
Page 20 - Fourthly, 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.
Page 21 - In these steam-vessels are placed weights, so fitted to them as to fill up a part or portion of their channels, yet rendered capable of moving freely in them by the means hereinafter mentioned or specified. When the steam is admitted in these engines between these weights and the valves, it acts equally on both, so as to raise the weight...
Page 53 - ... of an inch upon the top of the mercurial column ; because being lighter it ascends by the side of the tube ; which may now be inclined and the mercury will rise to the top manifesting a perfect vacuum from air. I next take a cylindrical glass...
Page 20 - ... any other substance colder than the steam to enter or touch it during that time. " Secondly. In engines that are to be worked wholly or partially by condensation of steam, the steam is to be condensed in vessels distinct from the steam...
Page 21 - When the steam is admitted in these engines between these weights and the valves, it acts equally on both, so as to raise the weight to one side of the wheel, and by the reaction on the valves successively, to give a circular motion to the wheel, the valves opening in the direction in which the weights are pressed, but not in the contrary ; as the steam vessel moves round, it is supplied with steam from the boiler ; and that which has performed its office may either be discharged by means of condensers...