. The Street railway journal . belts and shafting. All the machinetools are direct driven by individual motors, and the result April i8, iyo8.] STREET RAILWAY JOURNAL. 633 is a great improvement over the usual method of groupdriving. The working space is clear for shop operations,and no power is lost by the operation of mechanical driveswhen the machine is not in use. Speed regulation is moreflexible and the chance of accident is much lessened. Thefirst cost of the direct motor drive was not far from 30per cent more than the cost of the group method, but it isexpected that the compactness, eco
. The Street railway journal . belts and shafting. All the machinetools are direct driven by individual motors, and the result April i8, iyo8.] STREET RAILWAY JOURNAL. 633 is a great improvement over the usual method of groupdriving. The working space is clear for shop operations,and no power is lost by the operation of mechanical driveswhen the machine is not in use. Speed regulation is moreflexible and the chance of accident is much lessened. Thefirst cost of the direct motor drive was not far from 30per cent more than the cost of the group method, but it isexpected that the compactness, economy of operation and 5j/2 in. diameter, shaper 14 in., center to center 14 in., face3^ in.; extra pulley provided for driving old drill press,diameter 20 in. One 40-in. Bickford drill press, six speeds, double reduc-tion gearing drive by 2-hp compound wound motor; diam-eter pinion 2j4 in-, intermediate gear 6^ in., gear on ma-chine shaft 7>4 in., motor speed 1425 One lo-in. Burr metal saw % in. thick, spur and worm.
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Keywords: ., bookcentury1800, bookdecade1880, booksubjectstreetr, bookyear1884
