. Handbook of shoe factory engineering .. . 3 H. P. MOTOR REPLACING MULE STAND DRIVESPRINGFIELD SHOE WORKS. 5 H. P. MOTOR DRIVING 12 HAND METHOD LASTINGMACHINES AND 4 REX PULLING-OVER MACHINES „.,,, if j pipe-stem shafting, an enormous amountOld Method , . 7 . , . , , , , 01 power is wasted in irictional load for turning the shafting alone, and waste of power means wasteof coal and coal is expensive. By the use of electric motors and short drives, we havethe most flexible kind of an outfit, and if increases of outputM M th rl are contemplated tms flexibility works outvery simply by the additio
. Handbook of shoe factory engineering .. . 3 H. P. MOTOR REPLACING MULE STAND DRIVESPRINGFIELD SHOE WORKS. 5 H. P. MOTOR DRIVING 12 HAND METHOD LASTINGMACHINES AND 4 REX PULLING-OVER MACHINES „.,,, if j pipe-stem shafting, an enormous amountOld Method , . 7 . , . , , , , 01 power is wasted in irictional load for turning the shafting alone, and waste of power means wasteof coal and coal is expensive. By the use of electric motors and short drives, we havethe most flexible kind of an outfit, and if increases of outputM M th rl are contemplated tms flexibility works outvery simply by the addition of new or largermotors, while with the steam-driven plant an increase in theoutput requires a large investment for the new requirements.„ f The Alternating Current type of motor _, of 550 volts, 3-phase and 60-cycle, has proven Motors . / J K the most satisfactory. The 550-volt circuit requires less cost to install on account of the small size wire which can be used, and this high voltage „. , should not be more dangerous than a lower _, , _. one, provided that the necessary safetv Voltage
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