Abstract :
The paper describes an electric hoist recently installed in a mine at Butte, Mont., having a depth of shaft of 4000 ft., net weight of load 14,000 lb., weight of skip and cage, 9000 lb. and maximum hoisting speed 3000 ft. per, min. Some results of operations are given. This hoist is of special interest as being the largest electric hoist in the world and containing some important departures from previous practise.
