. Electrical world. providedfor operating the carriage travel. In the case of lathes and someother machinery, motors have also been provided for actuating pumpsdelivering soda water, etc., to the tools. In nearly every case, each tool is operated by its own independentmotor. Group drives have been used in but a few cases where thetools would not readily permit of any other arrangement. In thecase of the larger tools, as the boring mills, several planers, etc.,two and three motors are provided for various operations. In agreat many of the tools the motors are mounted directly on theseand drive
. Electrical world. providedfor operating the carriage travel. In the case of lathes and someother machinery, motors have also been provided for actuating pumpsdelivering soda water, etc., to the tools. In nearly every case, each tool is operated by its own independentmotor. Group drives have been used in but a few cases where thetools would not readily permit of any other arrangement. In thecase of the larger tools, as the boring mills, several planers, etc.,two and three motors are provided for various operations. In agreat many of the tools the motors are mounted directly on theseand drive the former through gears. In other cases the motors,although mounted on the machines, are belted to these, whereas inseveral instances the motors are placed at some convenient motors are used on the multiple voltage system. Becauseof the inability to obtain equipment as required, motors of nearlyevery make are used throughout the plant. The feeders for the cranes .ire taken from the centers of distri-. FIG. 7.—SWITCHBOARD AND BALANCING SiXS. bution in the various buildings without the intervention of switchesor circuit-breakers those at the power house and the circuit-breaker installed on the cranes themselves. One trolley wire whichis of the figure 8 section, is placed on each side of the crane feeder is tapped into this at about a quarter of the distance fromeach end and every 75 ft. between. The trolley wires are fastenedwith giant strain insulators and eye bolts and supported every 20 a clamp fastened to a bolt which has a vertical movement. Thebolt is insulated by fibre from the supporting bracket and the wholeis fastened to a wood block, secured to the girder runway. In theyards a similar construction is used, with the exception of an in-sulating bell in place of the giant strain insulators. The collectingwheels on the cranes pick up the trolley wire, thus preventing anj serious strains on the latter and also any undesirable flashing
Size: 1908px × 1310px
Photo credit: © The Reading Room / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1800, bookdecade1880, booksubjectelectri, bookyear1883
