. American engineer and railroad journal . etop of the valve, that was used on the earlier design, has beenretained. The mufflers instead of being at the top have beenplaced at the sides and are of an entirely new design, consistingof a large number of concentric brass rings arranged in threesections, one above the other. A full adjustment of any part ofthe valve can be made by removing a small top cap. This valverepresents the starting point of all the later muffled pop valves ofthis company. The next step is shown in Fig. 4 and consists principally ofminor improvements over the previous valv
. American engineer and railroad journal . etop of the valve, that was used on the earlier design, has beenretained. The mufflers instead of being at the top have beenplaced at the sides and are of an entirely new design, consistingof a large number of concentric brass rings arranged in threesections, one above the other. A full adjustment of any part ofthe valve can be made by removing a small top cap. This valverepresents the starting point of all the later muffled pop valves ofthis company. The next step is shown in Fig. 4 and consists principally ofminor improvements over the previous valve. This was broughtout about 1901. In it the spring has been made longer, an extraset of muffling rings has been introduced, the regulating ringlias been made broader and stiffer and the spring is copperplated. In other respects, however, it differs only in heavierconstruction, giving increased strength and durability. The next step in improvement of pop valves by this companyis shown in Fig. 5, which illustrates a design of 3 . in. valve.
Size: 1078px × 2319px
Photo credit: © Reading Room 2020 / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1800, bookdecade1890, booksubjectrailroadengineering
