CRANE. | Handling and Hauling Ore. 215 
consists of a U-shaped piece of iron, two and one-half feet in 
length, holding an eight-inch grooved pulley or sheave, B, at 
the top, which rolls or travels upon the track cable, C, and 
bears the weight of the bucket, the load, etc. ‘Two small four- 
inch sheaves, D, are placed about a foot below the top sheave, 
and just far enough apart to allow the half-inch traction cable, 
i, to work between them with ease. Six inches from the 
lower end two flat pieces of iron, Ff, enclose the holder, A, 
and are keyed to the same with a key, G. Both ends of the 
enclosing pieces are also enclosed in clevises, H, to which 
the loose ends of the traction cable, H, are fastened. In the 
bend of the holder a hook, J, is fastened. ‘This hook has a 
large head, J, which bears the load of the bucket, and, being 
rounded (a swivel), allows the hook to turn in any direction, 
and entirely around, if necessary. 
The cable, H, passes over a sheave at both the shaft and the 
mill ends. The driving sheave, K, is placed at the shaft end 
of the track cable and is shown in figure 27. On the shaft 
bearing the driving sheave is placed a pulley, L, which in 
turn is driven by the pulleys M and JN. . On the same shafts 
as M and WN are two friction wheels, driven by the large fric- 
tion wheel, O, which is fastened to the same shaft as the pul- 
ley P. The pulley P is driven directly from the hoisting 
engine, Q. The lever, S, is operated by the push rod, A, 
which, when pushed forward, forces the friction wheel, 0, 
against the driving wheel on the shaft with pulley M, and 
when pulled back brings O in contact with the wheel on the 
shaft with pulley V. The belt connecting the pulley M with 
the wheel L is straight, giving the same direction of rotation 
to the sheave, K, as has the driving pulley, @. The belt con- 
necting the pulley N with ZL is crossed, so that the direction 
of rotation of NV and L are reversed. This arrangement is 
made so that a rotation in one direction of the driving gear 
may be changed into either the direct or reverse rotation 
necessary to operate the traction cable, HL. 
The method of hoisting and transferring a bucket of ore 
from mine to mill is as follows: A bucket is raised by the 
hoisting drum, V, unhooked from the hook, X, and attached 
