The Principles, Construction, and Application of Pumping Machinery: (steam and Water Pressure) with Practical Illustrations of Engines and Pumps Applied to Mining, Town Water Supply, Drainage of Lands, Etc.; Also Economy and Efficiency Trials of Pumping Machinery |
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The Principles, Construction, and Application of Pumping Machinery: (Steam ... Henry Davey No preview available - 2016 |
Common terms and phrases
actuated air vessel applied atmospheres beam boiler pressure bore-holes bottom Boulton & Watt bucket lifts bucket pump cataract cent centrifugal pumps Chap coal Colliery column compound Cornish engine compound engine condenser connected Corliss valves crank cut-off delivery diameter discharge double-acting efficiency ratio employed engines and pumps equilibrium expansion feed water foot valve gallons heater high-pressure cylinder hydraulic engines hydraulic pumps I.H.P. per hour indicator diagrams jackets load low-pressure cylinder means mechanical efficiency metres mines motion non-rotative engines Pelton wheel pit-work plunger lifts plunger pumps pump rods pumping-engine reservoir revolutions per minute rising main rotative engines shaft shown in fig sinking lifts sinking pumps speed steam accumulator steam cylinder steam engine steam per I.H.P. steam pipe steam pump steam valve stroke strokes per minute supply surface surface condenser syphon tank tappet temperature trial underground valve gear velocity vertical Waterworks weight wheel whilst دو
Popular passages
Page 5 - ... a man, and the men obliged to rest at least a third part of that time. I dare undertake that the engine shall raise you as much water for eightpence as will cost you a shilling to raise the like with your old engines...
Page 3 - ... continues within the vessel, so far is the vessel dry without, and so very hot as scarce to endure the least touch of the hand. But as far as the water is, the said vessel will be cold and wet where any water has fallen on it, which cold and moisture vanishes as fast as the steam in its descent takes...
Page 3 - ... into P, pushing out all the air before it, through the clack r, making a noise as it goes ; and when all is gone out, the bottom of the vessel P will be very hot. Then pull the handle of the regulator to you, by which means you stop...
Page 8 - It next occurred to me that the mouth of the cylinder being open, the air which entered to act on the piston would cool the cylinder, and condense some steam on again filling it...
Page 161 - System of transmitting power from the surface to a hydraulic pump at the bottom of the mine. cause a breakdown of the plant. It therefore becomes necessary to introduce a device by means of which the relative positions of the pistons may be maintained. That is done by an arrangement of tappets and valves so designed that when either piston moves beyond its normal stroke a valve is opened, allowing some water to pass from one side of the piston to the other. It will be readily seen that the system...
Page 3 - ... so much strength), and is easily prevented by pulling the regulator some little time before the vessel forcing is quite emptied. This being done, immediately turn the cock or pipe Y of the cistern x on p, so that the water...
Page iii - SUPPLY, DRAINAGE of Lands, &c., also Economy and Efficiency Trials of Pumping Machinery. BY HENRY DAVEY, Member of the Institution of Civil Engineers, Member of the Institution of Mechanical Engineers, FGS, Ac.
Page 4 - I would have men, and those, too, the most apprehensive, employed in working the engine, supposing them more careful than boys." " In case it should be objected that the boiler must in some certain time be emptied, so as the work of the engine must stop to replenish the boiler, or endanger the burning out or melting the bottom of the boiler : to obviate this, when it is thought fit by the person tending the engine to replenish the great boiler, which requires an hour and a half or two hours' time...
Page 8 - His means and leisure not then permitting an expensive and complex apparatus, he used apothecaries' phials: with these he ascertained the two main facts, — first, that a cubic inch of water would form about a cubic foot of ordinary steam, or...