A Manual of the Steam EngineScott, Webster and Geary, 1842 - 293 pages |
Table des matières
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Expressions et termes fréquents
action air-pump apparatus application Atmospheric Engine atmospheric pressure attached axis axle beam boiler boiling carriages chimney cistern coal cock cold water combustion common condenser connected connecting-rod construction contrivance crank cubic foot cylinder descending described diameter double acting engine effect elastic force employed evaporation expansive feet flues fly-wheel force of steam fuel fusible plug Hall's heat horse power inches of mercury increased injection engines latent heat lever Liverpool load locomotive engine lower machinery marine engine means mechanical mercury metallic miles per hour mode motion moving power Newcomen's paddle wheel passages patent engines pipe piston piston-rod placed plate pounds principle produced propelled proportion pump rails railway raised represented resistance safety valve salt Samuel Morland screw Single Acting Engine slide speed square inch steam boat steam engine steam tube steam vessels stroke supply surface temperature tion tons Tredgold upper vacuum velocity vertical Watt Watt's weight
Fréquemment cités
Page 38 - 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 - So that, having a way to make my vessels so that they are strengthened by the force within them, and the one to fill after the other, 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...
Page 190 - That at this rate they have conveyed upwards of fourteen passengers. 3. That their weight, including engine, fuel, water and attendants, may be under three tons.
Page 32 - 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 37 - ... it in a case of wood, or any other materials that transmit heat slowly; secondly, by surrounding it with steam or other heated...
Page 37 - ... until it had established an equilibrium ; and if that vessel were kept very cool by an injection or otherwise, more steam would continue to enter until the whole was condensed.
Page 37 - ... first, that vessel in which the powers of steam are to be employed to work the engine, which is called the cylinder...
Page 190 - Steam has been applied as a power in draught in two ways: in the one, both passengers and engine are placed on the same carriage; in the other, the engine carriage is merely used to draw the carriage in which the load is conveyed. In either case, the probability of danger from explosion has been rendered infinitely small, from the judicious construction of boiler which has been adopted. " These boilers expose a very considerable surface to the fire, and steam is generated with the greatest rapidity.
Page 49 - ... ascent,) I proposed to employ two engines, acting upon two cranks fixed on the same axis, at an angle of 120° to one another, and a weight placed upon the circumference of the flywheel at the same angle to each of the cranks, by which means the motion might be rendered nearly equal, and only a very light fly-wheel would be requisite.
Page 149 - ... within cylinders, into which the steam or water of the boiler is allowed to enter, in order to press upon such pistons ; and which pistons are, by the intervention of certain levers and connecting rods, or by any other effective contrivance, made to bear upon the axles of the wheels of the carriage, upon which the engine rests.