. Railway master mechanic . othe cross-heads is shown in Fig. B. It will be seenthat the cross-head works in a four bar guide, and isprovided with a hub projecting above the guidesand one projection below, each of which receives apiston rod end. The crosshead has been made some-what longer than usual, and the piston rods are es-pecially strong to provide against any inequality ofthe work done in the two cylinders. The pistonvalves are placed in such a convenient position inregard to the links that no rocker shaft is foundnecessary; instead the links are each attached to asliding bar located cl
. Railway master mechanic . othe cross-heads is shown in Fig. B. It will be seenthat the cross-head works in a four bar guide, and isprovided with a hub projecting above the guidesand one projection below, each of which receives apiston rod end. The crosshead has been made some-what longer than usual, and the piston rods are es-pecially strong to provide against any inequality ofthe work done in the two cylinders. The pistonvalves are placed in such a convenient position inregard to the links that no rocker shaft is foundnecessary; instead the links are each attached to asliding bar located close to the inner face of theframe, which has suitable bearings at each end, andby means of a short inclined arm projecting up fromthis bar, connection is made to the valve rod. Thevalve motion is wonderfully simple. In fact all theparts of the engine which pertains to compoundingare compact and simple. Two of the cylinders are12 inches and the other two are 20 inches in diame-ter, and they occupy very little moie space than. in connection with the extension front,short front and diamond stack! 10th. Can you give any data confirming your opinion aslo saving of fuel! llth. About what does it cost you to apply the arch andextension front! r3th. How do you consider the cost of maintaining thearch and extension front compares with keeping up thediamond stack, cone, netting, lining, etc.! 13th. Do you consider that the arch and extension frontgreatly lessens the throwing of live or dangerous sparks,and also prevents much of the finer dirt, etc., thrown fromstacks from striking cars in train . 14th. Do you find that flues stop up or clog with cinders, as easily when the arch is used as without it! If you know of any points for or against the brickarch not covered by these questions, please name them. The committee desire to make as complete a report aspossible. Members will please furnish any blue prints,sketches, or any daU they can relating to the subject. T. W. Gentry,
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Keywords: ., bookcentury1800, bookdecade1870, bookidr, booksubjectrailroadcars
