The steam engine familiarly explained and illustrated; with an historical sketch of its invention and progressive improvement; its applications to navigation and railwaysBooks on Demand, 1840 - 350 страници |
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Страница xviii
... between the Resistance of the Load , the Resistances of the Engine , the Evaporation , the Speed of the Piston , and the Magnitude of the Cylinder · 515 Formulæ showing the Relation between the Power of the Engine xviii CONTENTS .
... between the Resistance of the Load , the Resistances of the Engine , the Evaporation , the Speed of the Piston , and the Magnitude of the Cylinder · 515 Formulæ showing the Relation between the Power of the Engine xviii CONTENTS .
Страница xix
... Load Formulæ for the useful Effect and the Duty Estimates of the several Sources of Resistances Tables to facilitate the Computation of the Effects of Expansive Engines · Table of the Areas of Pistons EXAMPLES of the Application of ...
... Load Formulæ for the useful Effect and the Duty Estimates of the several Sources of Resistances Tables to facilitate the Computation of the Effects of Expansive Engines · Table of the Areas of Pistons EXAMPLES of the Application of ...
Страница 35
... load peaceably ( like good horses ) , and thus become of great use to mankind , particularly for raising water , according to the following table , which shows the number of pounds that may be raised 1800 times per hour to a height of ...
... load peaceably ( like good horses ) , and thus become of great use to mankind , particularly for raising water , according to the following table , which shows the number of pounds that may be raised 1800 times per hour to a height of ...
Страница 58
... load of the safety valve , these valves were usually constructed so as to be held down by the pressure of a lever having a sliding weight upon it . By moving the weight on the arm of the lever , the pressure on the valve could be ...
... load of the safety valve , these valves were usually constructed so as to be held down by the pressure of a lever having a sliding weight upon it . By moving the weight on the arm of the lever , the pressure on the valve could be ...
Страница 84
... sufficient quantity to keep it at work . To enable it to continue to move , he found it necessary to lessen the quantity of water raised by its pump , so as to reduce the load on its piston very much below the 84 THE STEAM ENGINE .
... sufficient quantity to keep it at work . To enable it to continue to move , he found it necessary to lessen the quantity of water raised by its pump , so as to reduce the load on its piston very much below the 84 THE STEAM ENGINE .
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Често срещани думи и фрази
admitted air-pump already described amount applied ascend atmospheric engine atmospheric pressure attached axle beam boiler boiling bottom Boulton and Watt carriage centre chimney cistern closed coals cock cold water combustion communication condenser connecting rod constructed contrivance crank cubic cylinder descending diameter diminished driving elastic equal evaporation expansion experiments feet filled fire fire-box flues fly-wheel force fuel furnace greater heat imparted improved increased invention James Watt latent heat lever load locomotive engines machine magnitude means mechanical effect mercury miles motion moving power necessary opened parallel motion passage passing pipe piston piston-rod placed plate position pounds pressed principle produced propelling proportion pump quantity of water railway raised rendered represented in fig resistance Samuel Morland screws slide space speed square inch steam engine stopcock stroke sufficient sun wheel supply suppose surface temperature thermometer throttle-valve tube upwards vacuum valve H vapour velocity vertical vessel Watt weight wheels
Популярни откъси
Страница 314 - ... giving the feeble arm of man the momentum of an Afrite; commanding manufactures to arise, as the rod of the prophet produced water in the desert; affording the means of dispensing with that time and tide which wait for no man; and of sailing without that wind which defied the commands and threats of Xerxes himself.
Страница 24 - ... 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...
Страница 316 - And certainly no man ever bestowed such a gift on his kind. The blessing is not only universal, but unbounded ; and the fabled inventors of the plough and the loom, who were Deified by the erring gratitude of their rude contemporaries, conferred less important benefits on mankind than the inventor of our present steam-engine.
Страница 316 - It would .be difficult to estimate the value of the benefits which these inventions have conferred upon the country. There is no branch of industry that has not been indebted to them ; and in all the most material, they have not only widened most magnificently the field of its exertions, but multiplied a thousandfold the amount of its productions. It...
Страница 307 - ... that the latter are contained in it in a latent state, so as not to be sensible to the thermometer or to the eye ; and if light be only a modification of heat, or a circumstance attending it, or a component part of the inflammable air, then pure or dephlogisticated air is composed of water deprived of its phlogiston, and united to elementary heat ?
Страница 315 - This potent commander of the elements — this abridger of time and space — this magician, whose cloudy machinery has produced a change on the world, the effects of which, extraordinary as they are, are, perhaps, only now beginning to be felt — was not only the most profound man of science — the most successful combiner of powers, and calculator of numbers, as adapted to practical purposes — was not only one of the most generally well-informed, but one of the best and kindest of human beings.
Страница 315 - By his admirable contrivance, it has become a thing stupendous alike for its force and its flexibility — for the prodigious power which it can exert, and the ease, and precision, and ductility, with which that power can be varied, distributed, and applied. The trunk of an elephant, that can pick up a pin or rend an oak, is as nothing to it.
Страница 315 - W"e have said that Mr. Watt was the great improver of the steam-engine ; but, in truth, as to all that is admirable in its structure, or vast in its utility, he should rather be described as its inventor. It was by his inventions that its action was so regulated, as to make it capable of being applied to the finest and most delicate manufactures, and its power so increased, as to set weight and solidity at defiance. By his admirable...
Страница 317 - His astonishing memory was aided, no doubt, in a great measure, by a still higher and rarer faculty — by his power of digesting and arranging in its proper place all the information he received, and of casting aside and rejecting, as it were instinctively, whatever was worthless or immaterial.
Страница 318 - There was nothing of effort indeed, or impatience, any more than of pride or levity, in his demeanour : and there was a finer expression of reposing strength, and mild self-possession in his manner, than we ever recollect to have met with in any other person. He had in his character the utmost abhorrence for all sorts of forwardness, parade, and pretensions ; and, indeed, never failed to put all such impostors out of countenance, by the manly plainness and honest intrepidity of his language and deportment.