. Electrical world. esults of the National Board ofFire Underwriters. Punch and Shear Motor-Driven. In the busy shops of the Charlestown Navy Yard are found manyinstances of the effectiveness of motor-drive as applied to punchingand shearing machinery. The character of the work done is suchas to subject the motors to very severe conditions of load and inevery case they have answered all the demands made upon accompanying half-tone shows a Long & .\llstatter Companydouble punch and shear driven by a Crocker-Wheeler semi-enclosed 2-hp motor, wound for a pressure of 220 volts and a speed
. Electrical world. esults of the National Board ofFire Underwriters. Punch and Shear Motor-Driven. In the busy shops of the Charlestown Navy Yard are found manyinstances of the effectiveness of motor-drive as applied to punchingand shearing machinery. The character of the work done is suchas to subject the motors to very severe conditions of load and inevery case they have answered all the demands made upon accompanying half-tone shows a Long & .\llstatter Companydouble punch and shear driven by a Crocker-Wheeler semi-enclosed 2-hp motor, wound for a pressure of 220 volts and a speed of The machine does work up to punching a yi-in. hole in , 35 strokes to the minute, or shearing a i-in. round or a 3 xj2-in. flat bar. It will receive punching tools, or cross-cut or splittingshears. This type of machine is built with a throat from 4 to 30 depth. The respective sides of the double machines are entirelyindependent, so that one side may be run while the other is idle or. MOTOR-DRIVEX PUNCH .\.\D SHEAR. both may be operated at the same time. There is an automatic stopwhich may be used to arrest the slide at any point in the stroke. The simplicity of attachment and convenience in operation of thismotor-drive equipment is evident. It means a rapidity of control anda saving in floor space and permits a flexibility of shop arrangement,with respect to light, etc., that is out of the question with the oldmethod of shaft and belting. Direct Connected Electric Pump. The engraving herewith illustrates an improved type of direct-connected electric pump for supplying tanks with water in ofl^cebuildings, apartment houses, hotels and residents. The makers claimfor it high eflRciency, simplicity and durability. By a special switch
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Keywords: ., bookcentury1800, bookdecade1880, booksubjectelectri, bookyear1883
