. Machinery for metalliferous mines : a practical treatise for mining engineers, metallurgists and managers of mines. The winding rope is carried along the ground until clear of thehorse, when it passes under a pulley, and then up the pit frame, andover the main winding pulley. The brake and disconnecting leverspit frame, so as to be convenientlyhandy to the banksman. These bolsters are intended for tem-porary purposes only, but will carry on thesinking operations down to 300 ft. Thetotal load, including the ore and bucket,should not ex-ceed from 800 lb. to 1000 lb., and the Fig.
. Machinery for metalliferous mines : a practical treatise for mining engineers, metallurgists and managers of mines. The winding rope is carried along the ground until clear of thehorse, when it passes under a pulley, and then up the pit frame, andover the main winding pulley. The brake and disconnecting leverspit frame, so as to be convenientlyhandy to the banksman. These bolsters are intended for tem-porary purposes only, but will carry on thesinking operations down to 300 ft. Thetotal load, including the ore and bucket,should not ex-ceed from 800 lb. to 1000 lb., and the Fig. speed will vary from 75 ft. to 60 ft. per minute, according to the weight. Portable Winding Plant. —During the preliminary pro-specting period, through which amine must pass before its valueis sufificiently established to war-rant the erection of permanentmachinery, a small portablehoisting plant is of the greatestutility. Plant of this kind (illustratedin fig. 45) has been designed by. Fig. ;45.—Portable Winding Plant. Messrs. E. S. Hindley & Sons, of Bourton, Dorset, with the special view 78 MACHINERY FOR METALLIFEROUS MINES. of supplying a hauling, hoisting, or power plant on a small scale, whichis not only portable, but is so constructed as to withstand the roughtreatment which it assuredly would receive from unskilled hands. It consists of a vertical engine, with a vertical cross-tube, or other typeof boiler mounted on a strong wrought iron girder plate, extended forwardso as to carry the winding drum, which is geared to the crank engine is fitted with reversing gear. The drum has a powerfulbrake, which may be either single or double cylinder, controlled by a footlever, and can be unclutched from its shaft. The engine can then beused for driving a saw bench, or a few head of stamps or other machinery,in view of which a turned flywheel is keyed to the engine shaft, fromwhich a belt may be taken to the other machines. The starting andreversing hand
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