The wonders of modern mechanismA résumé of recent progress in mechanical, physical, and engineering science . rger scale. Each is tobe of fifteen hundred horse-power, and capable of haulinga two-hundred-and-fifty-ton train at a speed of sixty-twomiles an hour. Their operation is looked forward to withinterest by railroad men the world over. Their cost isestimated at about thirty thousand dollars each, or aboutthree times that of an average steam-locomotive. The Sprague electric locomotive, shown in the illus-tration, was built at the Baldwin Locomotive Works, inPhiladelphia, after designs by M
The wonders of modern mechanismA résumé of recent progress in mechanical, physical, and engineering science . rger scale. Each is tobe of fifteen hundred horse-power, and capable of haulinga two-hundred-and-fifty-ton train at a speed of sixty-twomiles an hour. Their operation is looked forward to withinterest by railroad men the world over. Their cost isestimated at about thirty thousand dollars each, or aboutthree times that of an average steam-locomotive. The Sprague electric locomotive, shown in the illus-tration, was built at the Baldwin Locomotive Works, inPhiladelphia, after designs by Messrs. Sprague, Duncan,and Hutchinson, and was completed in 1895. The NorthAmerican Company are to use it in hauling heavy freightand in switching. There are four pairs of drivers coupledtogether by quarter-cranked connecting-rods. The weight 192 WONDERS OF MODERN MECHANISM. is one hundred and thirty-four tliousand pounds, equallydistributed between the fifty-six-inch drivers. It is de-signed for a speed of thirty-five miles an hour. Thedraw-bar pull exceeds ten thousand pounds, each of the four Fig. THE SPRAGUE ELECTRIC LOCOMOTTSrE. motors being of about two hundred and fifty brackets which carry the motors are pedestal boxes ofpeculiar form made of cast steel, the lower sides beingarranged to be dropped out. These boxes carry both theaxles upon which the armatures are rigidly mounted, thefield mao-nets beino; concentric to them. The motors areiron-clad, the field magnets consisting of two steel castings,having two field coils placed at the ends of the motors,forming two consequent and two salient poles. Com-pound-wound magnets are used, and slotted Westinghousearmatures. The whole structure is carried on equalizingsprings. The controlling apparatus in the cab is soarranged that the engineer sits at the right-hand sidelooking forward, no matter which way he is running, forthe locomotive is a double ender. E. Moody Boynton, of West Newbury, Massachusetts,
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Keywords: ., bookcentury1800, booksubjectmachinery, booksubjectmechanicalengi
