CraNneE.| Prospecting, Mining and Milling Machinery. 247 
geared hoisting engine. Only the power forms will be con- 
sidered here, however. 
Horistine Eneines.—Horse Hoist or Whim. The horse hoist 
or whim consists of a framework upon which is mounted a 
drum, A,on ashaft, VN. Figure 38. The shaft is set in box- 
ings which are fastened tothe framework. The lever is sup- 
ported by a U-shaped strap, D, which is pivoted at both ends. 
It is thus evident that the lever has practically a universal 
movement, or, as far as we are concerned, two distinct move- 
Fig. 38. Drum, with controlling lever, of a horse whim. 
ments at right angles toeach other. At one end of the drum 
is a square grooved wheel, upon the periphery and between 
the flange of which an iron band, Ff, rests, and is fastened by 
one end to the lower end of the lever by means of an eye 
bolt, H. The bolt, H, thus supports one end of the band, 
while the other end is fastened by means of a hook to a point 
above the hinge, D, and at a distance above G equal to the 
distance from D to LE. It is therefore apparent that if the 
_ lever is thrown to the right the band is loosened on the wheel, 
if to the left, it is tightened, thus forming an excellent form 
of friction band brake. The working of the clutch may be 
