. Journal of electricity, power, and gas . the boiler frequently requiresrepairs. Of course these repairs involve a loss of time andmoney. Besides, there are the expenses of a fireman, ofpiping or hauling water, and of hauling fuel, that go to makeup a considerable outlay of money in the course of a , a steam shovel wastes considerable fuel and water atnight, especially in winter, as the fire must be kept up toprevent the boiler and pipes from freezing. Furthermore,an important saving arises from the fact that an electricshovel uses power only when it is doing actual work. As,when st
. Journal of electricity, power, and gas . the boiler frequently requiresrepairs. Of course these repairs involve a loss of time andmoney. Besides, there are the expenses of a fireman, ofpiping or hauling water, and of hauling fuel, that go to makeup a considerable outlay of money in the course of a , a steam shovel wastes considerable fuel and water atnight, especially in winter, as the fire must be kept up toprevent the boiler and pipes from freezing. Furthermore,an important saving arises from the fact that an electricshovel uses power only when it is doing actual work. As,when steam power is used for a shovel, the steam must bekept up all the time, whether the shovel is at work or idle,there is a considerable waste of fuel and water. On an elec-tric shovel, the power is always ready, easily applied, and isnot being consumed when the shovel is idle waiting for carsor from any other cause. As soon a,s the power is cut offfrom the motors, the consumption of current stops; hencethere is no wasts of current Electric Shovel. The electric shovel should appeal strongly to brick andtile manufacturers, to owners of stone quarries, cementplants, electric railroads, placer gold mines and ore minesthat are being operated by what is known as the open cutmethod, as a battery of electric shovels operated from a cen-tral power plant will affect an enormous saving over steamshovels. The shovel shown by the photograph is of the Little Gianttype, mounted on cast steel traction wheels. It carries a 1%cubic-yard dipper and weighs approximately 35 tons. It willmake a cut 40 ft. wide in a 10-foot bank and will clear a fioorof 26 ft. The point of the crane stands 20 ft. above theground. The dipper will dump 12 ft. 6 in. above the groundand 21 ft. out either way from the center of the shovel. Thecar body is 23 ft. long by 7 ft. wide. The shovel is equipped by three Westinghouse motors asfollows: One motor for hoisting the dipper, one for swinging
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Keywords: ., bookcentury1800, bookdecade1890, bookidjo, booksubjectelectricity
