In hoisting from great depths the weight of the rope, which may exceed that of the cage and FIG.
This is important in mine hoisting,.
The engines used for winding or hoisting in collieries are usually direct-acting with a pair of horizontal cylinders coupled directly to the drum shaft.
The child-labour law of 1909 forbids the employment of children under eighteen years of age in blast furnaces, tanneries, quarries, in managing elevator lifts or hoisting machines, in oiling dangerous machinery while in motion, at switch tending, as brakesmen, firemen, engineers, motormen and in other positions of similar character.
In 1917, speed of transport of material becoming extremely urgent, it was decided to establish a train-ferry service; it came into operation at the end of that year, and the hoisting of cargoes by cranes into barges was largely superseded.
