. Locomotive engineering : a practical journal of railway motive power and rolling stock . nt shaft was placed be-tween the truck axles and connected bycranks and the long side rod to the maindrivers. The shaft carried a central cogwheel which drove each truck axle,through intermediate gearing; the inter- h(-ur5 and 22 minutes, and was highlycommended by many; but in spite of thisand the most sanguine hopes of Mr. Bald-win, there was no demand for these en-gines, and this was the only one built. In this connection it is interesting tonrte some of the claims of the patent re-fer! ed to. There w
. Locomotive engineering : a practical journal of railway motive power and rolling stock . nt shaft was placed be-tween the truck axles and connected bycranks and the long side rod to the maindrivers. The shaft carried a central cogwheel which drove each truck axle,through intermediate gearing; the inter- h(-ur5 and 22 minutes, and was highlycommended by many; but in spite of thisand the most sanguine hopes of Mr. Bald-win, there was no demand for these en-gines, and this was the only one built. In this connection it is interesting tonrte some of the claims of the patent re-fer! ed to. There were: A fan for blowingthe fire, placed under the foot-board anddriven by friction of grooved wlieel ondriver flange (we didnt dream of infring-ing this when we designed the Gilderflukegrate-shaker); metallic packing, of wire,ii;slcad of hemp or wool, for stuffingboxes; spiral and semi-elliptic springs end of truck frame, and several otherinteresting points. This engine is one of the many steps inlocomotive development, and as it is notgenerally known, is sure to be of BOYS LOCOMOTIVE THAT (iOHS. mediate gears having wide teeth, so thetruck could pivot while the central shaftremained parallel with the driving gears were of such diameter as todrive the truck wheels at the same sur-face speed as the drivers: but it is ratheramusing to think of this feature, after theinventors objection to any slight diflfer-ence in diameters of drivers, for the gear-ing (of that day in particular) is muchmore apt to cause trouble than the other. This engine was built in 1841, and inAugust of that year was put into serviceby tlie Sugarloaf Coal Company. Itvvfeighed 30,000 pounds, with 11,775 poundson the drivers, and the balance on thetruck. The drivers were 44 inches andthe truck wheels 33 inches in diameter,while the cylinders were 13 inches diam-eter by 16 inches stroke. On the trial trip it hauled 500 tons fromReading to Philadelphia (,^4 miles) in 5 A Boys Engine
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