Spons' dictionary of engineering, ed. by O. Byrne (and Spon). 8 div

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Oliver Byrne, Ernest Spon
1869
 

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Página 147 - ... and it also presented certain dangers. Kind then, for the larger class of borings, availed himself of sliding guides, so contrived as to be equally thrown out of gear when the machinery had come to the end of the stroke, and maintained in their respective...
Página 203 - ... surface; just so with the axle; it has its points of support and its loaded parts, but it is not clearly evident which are the loaded parts and which the props. It has been stated that the wheels may be considered the props, and the journals the loaded parts; but it is thought that with equal...
Página 159 - In that case, a locking-clip was added at each screwed joint above, and secured by bolts, at the time of putting the rods together for lowering them down the well to recover the broken portion ; and by this means the ends of the rods were prevented from becoming unscrewed in the coupling-sockets, when the rods were turned round backwards for unscrewing the joints in the broken length at the bottom of the bore-hole.
Página 355 - ... which can be accounted for only by the fact that the open-topped furnace has the advantage of a large amount of surplus heat due to the combustion of the waste gases at its throat, which serves to dispel moisture and calcine the limestone and helps to warm up the large pieces of ironstone : all of which operations in the close-topped furnace are effected only at a lower point of the furnace, thus necessitating a larger consumption of coke. With the same proportion of ironstone to limestone it...
Página 372 - LL deliver into the passages M, on the top of the cylinder, which communicate with the air main N , by the chest O, formed between the cylinders. The piston of the blowing cylinder is intended to be made without any packing, being a light hollow cast-iron piston turned to an easy fit ; and the...
Página 118 - The water is drawn from the reservoir by pipes laid in a tunnel cut through the rock in the solid, at the end of the main embankment, no pipes being laid through the embankments themselves. At the end of the tunnel next the reservoir there is a stand-pipe with valves at different heights, which admit of water being drawn off at various levels. The water passes down the stand-pipe and along a...
Página 152 - Kind's arrangements the trepan was thrown out of gear by the reaction of the water which was allowed to find its way into the column of the excavation ; but that it is not always possible to command the...
Página 354 - There is no novelty in the fact of Taking Off the Waste Gases from a blast furnace ; for many methods have been and are at present employed for accomplishing this object. Though the writer was unaware of any similar method, it is not desired to claim originality in that about to be described; but as there is such acknowledged diversity of opinion as to the respective merits of different plans, and great difficulty in procuring reliable information on any, it is proposed to...
Página 371 - ... cylinders driven by the air of the large blowing engine. These small cylinders, when driving the shafting only, sometimes attained a velocity of upwards of 200 revolutions per minute, suggesting the idea of the possibility of reversing their motion and taking in the air in place of blowing it out through them : .there was, however, a difficulty in the slide-valve, which did not open and shut fast enough.

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