. American engineer and railroad journal . tin- cam lever :;>about its pivot 36 by its engagement with and disengagement direction by the admission of motive fluid thereto through thethen open passage 12. Such movement of the piston movesthe connected converting valve mechanism into the positionproper for the operation of the engine as a simple or non-com-pound engine, which operation is continued so long as the re-verse lever remains at or closely adjacent to either extremityof its arc of traverse. By the movement of the reverse lever,in either direction toward the middle of its arc of tra
. American engineer and railroad journal . tin- cam lever :;>about its pivot 36 by its engagement with and disengagement direction by the admission of motive fluid thereto through thethen open passage 12. Such movement of the piston movesthe connected converting valve mechanism into the positionproper for the operation of the engine as a simple or non-com-pound engine, which operation is continued so long as the re-verse lever remains at or closely adjacent to either extremityof its arc of traverse. By the movement of the reverse lever,in either direction toward the middle of its arc of traverse, forthe purpose of cutting off steam at a desired point in the strokeof the pistons, as is practiced ordinarily after the train hasbeen started, the pin 40 is moved into the portion of the slot 41between tin- cam ways 42 and 43, elevating the arm of the camlever 35 in which said slot and cam ways are formed and de-pressing the opposite arm, thereby moving the distributionvalue 30 to the left, and effecting the movement of the piston. 7 in the same direction by the admission of motive fluid theretothrough tin- then open passage 10. Such movement of the pision moves tin- connected converting valve mechanism into theposition propel for the normal operation of the engine as acompound engine, which operation is continued so long as therse lever stands in such position oris so moved that thepin 40 remains out of contact with eithei of tin- cam ways 48. The cam ways may. if desired, be so proportioned thatthe pin 40 will remain in contact therewith when tin- reverselever is moved one or more notches out of either of its extremeions, and it will In- noted that tin- rear cam way 42 ismade of greater depth than the forward one 48 to accommo-date tin- increased degree of movement of tin- cam level 35 at. and near its rear end, due to the greater distance thereof fromI In- pivot 3G of the lever. The above device is tin invention ol !.\Ir. Daniel A. Wight-man, ol tie- Pittsburgh
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectrailroadengineering
