The Steam EngineLongmans, Green, and Company, 1888 - 528 pages |
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Common terms and phrases
back pressure body Boyle's law carbon chimney combustion commencement compound engine compression condenser connecting rod consequently constant corresponding crank crank arm crank-pin cubic foot curve cut-off dead centre diameter distribution valve eccentric rod effect equal evaporation exhaust steam expansion valve external flues foot-pounds force friction fuel furnace gases gear given heat engine heat expended heat required heating surface Hence horse-power hyperbola increase indicator diagram jacket Lancashire boiler large cylinder latter length locomotive means metal motion moving multiplied piston rod plates portion position pressure and volume quantity of heat radius raise rate of expansion ratio represented resistance right angles riveted shaft sides slide valve small cylinder space specific heat square inch steam engine steam is cut steam port steam pressure stroke supposed surface condensers tangential thermal units tion total heat tubes valve circle velocity vertical weight
Popular passages
Page 22 - The immediate cause of the phenomena of heat then is motion, and the laws of its communication are precisely the same, as the laws of the communication of motion.
Page 148 - Change of motion is proportional to the impressed force and takes place in the direction of the straight line in which the force acts.
Page 22 - Heat, then, or that power which prevents the actual contact of the corpuscles of bodies, and which is the cause of our peculiar sensations of heat and cold, may be defined a peculiar motion, probably a vibration of the corpuscles of bodies, tending to separate them. It may with propriety be called the repulsive motion.
Page 2 - For a steam-engine may be defined as an apparatus for doing work by means of heat applied to water ; and since raising such a weight as the piston is a form of doing work, this apparatus, clumsy and inconvenient though it may be, answers the definition precisely.
Page 230 - ... of an eccentric is the distance from the centre of the shaft to the centre of the eccentric disc. Usually the centre of the disc is within the circumference of the shaft ; but this does not alter the nature of the device, which remains simply a short crank with a large crank pin. THE SCOTCH YOKE OR SLOTTED CROSS-HEAD. The usual method of connecting the cross-head to the crank pin by means...
Page 5 - We will commence with the source of heat, and apparatus for turning the water into steam; then go on to the engine proper, ie, the cylinder with the mechanism belonging to it. The abstracter of heat, or condenser, will be considered in a separate chapter. Fig. 2 is an elevation of the boiler, Fig. 3 a vertical section through its axis, and Fig. 4 a horizontal section through the furnace bars. The type of steam generator here exhibited is what is known as a vertical tubular boiler. The outside casing...
Page 39 - The Specific Heat of a body is the ratio of the quantity of heat required to raise that body one degree to the quantity required to raise an equal weight of water one degree.
Page 31 - Temperature. — The temperature of a body is its thermal state considered with reference to its power of communicating heat to other bodies.
Page 379 - H, H. About one-third of the tubes (those marked with a cross in the figure) are threaded and provided with nuts, and thus act as stayrods for the flat surfaces occupied by the tubes. The flat sides of the combustion chambers are stayed to each other and to the rear head by the staybolts S, S. The flat tops of the combustion chambers, called the crown sheets, are strengthened by the girder stays, or crown bars, C, C.
Page 371 - LOCOMOTIVE BOILERS. The essential features of locomotive boilers are dictated by the duties which they have to perform under peculiar conditions. The size and the weight are limited by the fact that the boiler has to be transported rapidly from place to place, and also that it has to fit in between the frames of the locomotive ; while at the same time, the pressure of the steam has to be very great in order that with comparatively small cylinder the engine may develop great power ; moreover, the...