. Machinery for metalliferous mines : a practical treatise for mining engineers, metallurgists and managers of mines. ese, and then is droppedon the top of them, being thus broughtto the exact level of the rails on thepit bank. When the cage is raisedagain the lever (g) is drawn back, andthe keeps are thus held clear, while thecage passes through and down the winding rope is attached to thecage by a short length of chain shackle,and is usually provided with a safetydetaching hook, for the prevention ofover-winding. This hook is so arrangedthat when it passes through a funnel-shaped cas
. Machinery for metalliferous mines : a practical treatise for mining engineers, metallurgists and managers of mines. ese, and then is droppedon the top of them, being thus broughtto the exact level of the rails on thepit bank. When the cage is raisedagain the lever (g) is drawn back, andthe keeps are thus held clear, while thecage passes through and down the winding rope is attached to thecage by a short length of chain shackle,and is usually provided with a safetydetaching hook, for the prevention ofover-winding. This hook is so arrangedthat when it passes through a funnel-shaped cast iron cylinder fixed on thepit head, the winding rope is detached,the cage held suspended, and an acci-dent thus avoided. A good and complete arrangementof boilers, winding and pumping engines,and pit head gear is shown in fig. 57,which also illustrates the constructionof a double pit head gear in 56.—Single Deck Cage, with Where the quantity of water is small Landing Dogs. ,, i j • u ^i • j- the pumps can be driven by the wmdmgengine, or tanks be fitted into the cages for winding out the Pit Head and Hoisting Plant for Inclined Shafts.—The hoisting plant described for vertical shafts is not adapted to those whichfollow the lode downwards on the line of its dip. For shafts of thisdescription an arrangement such as that illustrated in fig. 58 is themost suitable. The skip, with its load of minerals, runs on longitudinal woodensleepers, the upper surface of which is covered with a slip of ironin order to resist the wear. The .skip itself is of iron or sheet steelof the form illustrated in fig. 59. The tread of the leading wheels riT HEAD GEARS. 91 is half the width of that of the trailing, and the rope is attached toon iron hoop hinged at the back of the skip. At the surface, or at any
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Keywords: ., bookcentury1900, bookdecade1900, bookpublishernewyo, bookyear1902
