. Bulletin. Science. rial v-* ? JVJ. Figure 9.—Running gear and truck designed by John L. Whetstone, as shown in the drawing for patent 27850, issued April 10, 1O60. Levi Bissell produced the basic patent for such a truck in 1857. Zerah Colburn in September of that year had suggested to Bissell that he develop a 2-vv'heel truck. Such a device, he believed, would be well received in Britain.^* He was quite correct, as will shortly be seen. In nearly every respect Bissell's 2-wheel truck (see fig. 7) followed the idea of the original patent for the 4-wheel truck, which he claimed as the bas
. Bulletin. Science. rial v-* ? JVJ. Figure 9.—Running gear and truck designed by John L. Whetstone, as shown in the drawing for patent 27850, issued April 10, 1O60. Levi Bissell produced the basic patent for such a truck in 1857. Zerah Colburn in September of that year had suggested to Bissell that he develop a 2-vv'heel truck. Such a device, he believed, would be well received in Britain.^* He was quite correct, as will shortly be seen. In nearly every respect Bissell's 2-wheel truck (see fig. 7) followed the idea of the original patent for the 4-wheel truck, which he claimed as the basis for the present invention. The pintle was located behind the truck axle, near the front driving-wheel , Peunoyer, "Messrs. Harrison, Winans & Eastwick, St. Peters- burg, Russia," Railway and Locomotive Historical Society Bulletin no. 47, September 1938, p. 46; and Joseph Harrison, Jr., The Locomotive Engine, and Philadelphia^s Share in its Early Improve- ments, Philadelphia, 1872, p. 52. 18 Zerah Colburn, Locomotive Engineering and the Mechanism of Railways, . . , London, 1871, p. 99. Zerah Colburn (1832- 1870) was one of the best informed and most vocal authorities on 19th-century American locomotive construction. He not only designed advanced machines while working at the New Jersey Locomotive Works but also advocated many reforms in locomotive design. He published the Railroad Advocate in New York City for several years. In 1858 he became editor of The Engineer and in 1866 founded the technical journal Engineering. and the weight was carried by incline planes that also served as the centering device. A study of the patent drawing in figure 7 reveals several interesting points. Note that the V's, and thus the point of bearing, are slightly in front of the center line of the truck axle. It was suggested in the patent specification that the V's might be placed to the front, rear, or directly over the axle, but in most actual applications they were placed
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