. Factory and industrial management . g given as far back as 1866;and neglect in this particular has fre-quently led to lamentable fatalities. Since1865 no less than 97 coal-laden vesselshave been destroyed and the lives of sometwo thousand seamen sacrificed throughspontaneous ignition of the cargo. A New Form of Air-Pump. We have reproduced the accompanyingengravings, which will much interest ma-rine engineering constructors, and havecondensed the description of the same fromEngineering {k.\x^. 14). The pump was in-vented and designed by Mr, FrederickEdwards of London, and the design pre-sent
. Factory and industrial management . g given as far back as 1866;and neglect in this particular has fre-quently led to lamentable fatalities. Since1865 no less than 97 coal-laden vesselshave been destroyed and the lives of sometwo thousand seamen sacrificed throughspontaneous ignition of the cargo. A New Form of Air-Pump. We have reproduced the accompanyingengravings, which will much interest ma-rine engineering constructors, and havecondensed the description of the same fromEngineering {k.\x^. 14). The pump was in-vented and designed by Mr, FrederickEdwards of London, and the design pre-sents the following advantages: No foot or bucket valves to leak and getout of order; the barrel is shorter; thefoot valve seat and the flange which sup- ports it are not required; neither is itnecessary to have any door in the number of valves and working partsare, therefore, reduced to a minimum, andthe only valves are in the most accessibleposition. It is also claimed that two-thirdsof the sources of breakdown and delay are. removed, and very much less than one-third of the time is required for overhaul-ing the pump. Fig. i is a sectional eleva-tion, and Fig, 2 a plan. The bucket is ofa coned form underneath, and it nearly fitsthe bottom of the chamber. When thebucket descends, it strikes the water lyingin the bottom, and the water is in this way MARINE ENGINEERING. 15s forced outwards with considerable velocity,striking the curved part of the outerchamber; this changes its direction, andcauses it to flow through openings pro-vided in the barrel just above thebucket, the momentum it acquires beingsufficient to carry it well up the bucket, on its return stroke, closesthe ports before the water has time to re-cover from its upward travel. By thisarrangement the necessity for foot andbucket valves is entirely done away quantity of water an air pump,working in connection with a surface con-denser, has to lift is very small, and, in agood triple-expansi
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Keywords: ., bookcentury1800, bookdecade1890, booksubj, booksubjectengineering
