Show CHANGING METHODS OF MINING AT THE UTAH COPPER PROPERTY the utah copper company is so changing the methods of mining at bingham that in a short time the old fashioned steam shovels will be entirely replaced with caterpillar er propelled machines already it is announced two caterpillar tractor type marion model 92 electrical shovels with four and a half yard dipper dippers shave been ordered by the company one will be of the alternating current type and the other direct current the virtues of these two types will be tested to determine the type best adapted to the companas comp anys demands by using 6 electrical shovels a saving t of 10 cents a ton in the minin mining of the ore can be effected no coal no water no firing no watching of shovels during side shifts will be necessary repairs will be less there will be no loss of energy eberg zy as there is with steam shovels during periods of temporary shutdown because it will not be necessary to keep steam up no time will be lost for the repairing and washing of boilers main electrical transmission lines will be laid along the edge of the banks power will be conducted to shovels from the main lines in volt flexible armored cables durin during periods of blasting these subsidiary lines will be reeled up out of the way of danger when the relative virtues of the direct current shovel as compared with the alternating b are determined the company will convert all of its steam shovels to electrical shovels |