. The railroad and engineering journal . motion of lap +lead being given to the valve by a connection from thepiston-rod cross-head. Those who saw the Belgian Statelocomotives shown at the late Paris Exhibition would ob-serve the latest example of the Walschaert gear, and it isidentically the same as what we have described as theoriginal Waldegg gear. Kitson does away with the eccentric motion, but stilluses a circular motion received from the crank-pin, andinstead of using the vibrating link he uses a bell-cranklink. Fig. 11 shows this gear applied to a marine engine,and fig. 10 shows the Wal
. The railroad and engineering journal . motion of lap +lead being given to the valve by a connection from thepiston-rod cross-head. Those who saw the Belgian Statelocomotives shown at the late Paris Exhibition would ob-serve the latest example of the Walschaert gear, and it isidentically the same as what we have described as theoriginal Waldegg gear. Kitson does away with the eccentric motion, but stilluses a circular motion received from the crank-pin, andinstead of using the vibrating link he uses a bell-cranklink. Fig. 11 shows this gear applied to a marine engine,and fig. 10 shows the Walschaert gear as fitted to the sameby Messrs. Ramage & Ferguson, of Leith. It has alsobeen fitted by Napier, Denny, and others, in the ClydeDistrict. As you will observe, in both of these gears thepiston-rod connection moves the valve through its lap +lead, while the eccentric in the Walschaert and the throwfrom the crank in the Kitson gives the port opening. Themethod for accomplishing expansion and reversion is by /{it ion. sliding valve-rod attachment to block F across the link//, as in the usual link motion. Zeuner has pointed out in connection with the Waldegggear that, with the exception of the constant leads, it is nobetter than a well-designed link motion for steam distribu-tion. The angling of the rods, however, in the Walschaertapplication to marine engines has a beneficial effect on themotion of the valve, giving equal or unequal claims The means above described for obtainingthe motion for working the slide-valves of motive-powerengines from the cross-head and cranks of such engines. (to be continued.) Vol. LXIV, No. 2.] ENGINEERING JOURNAL. 63 WATER-TUBE BOILERS. (Abstract of paper read before the Institution of Civil Engineers, by ) Water-tube boilers are those in which the water to beevaporated is contained within the tubes which form theheating-surface. In 1878 Mr. Flannery, in a paper con-tributed to the Institution, showed w
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Keywords: ., bookcentury1800, bookdecade1880, booksubjectrailroa, bookyear1887
