. American engineer and railroad journal . er so that it can be used todraw the diagonal to the TD -~ S scale; or an even better plan JOY VALVE GEAR ON LOCOMOTIVES. The Joy design of valve gear is of the radial type to whichthe Walschaert and Marshall designs belong, but differs fromboth of these in several important particulars. It has been usedto some extent in marine practice both in this country and abroad,but has never met with much favor in locomotive practice ex-cept in England, where several companies have applied it to anumber of locomotives, and one, the Lancashire & Yorkshire, toa v
. American engineer and railroad journal . er so that it can be used todraw the diagonal to the TD -~ S scale; or an even better plan JOY VALVE GEAR ON LOCOMOTIVES. The Joy design of valve gear is of the radial type to whichthe Walschaert and Marshall designs belong, but differs fromboth of these in several important particulars. It has been usedto some extent in marine practice both in this country and abroad,but has never met with much favor in locomotive practice ex-cept in England, where several companies have applied it to anumber of locomotives, and one, the Lancashire & Yorkshire, toa very large proportion of its equipment. Practically its onlyuse in this country on modern locomotive equipment has been inthe case of a three-cylinder locomotive, where it is used foractuating the valve gear of the center cylinder. This valve gear has all of the advantages of the Walschaertgear for locomotive use, and some features which make it moredesirable than that type for this purpose. On the other hand, it s2RE3^5 --t- •=°^°. DESIGN or JOY VALVE GEAR USED ON THE LANCASHIRE AND YORKSHIRE RAM WAY. is to mount a transparent celluloid arm to pivot about the origin,drawing a line along the arm from the origin. WEIGHING COAL FOR LOCOMOTIVES. It will be conceded that the most difficult side of the trans-actions is to obtain reports of the actual disbursements, as it iswell known that this information is arrived at by most all roadson practically an estimated basis, on either the figured capacityof a coal bucket or other conveyance. It is found, however,from experience and actual test that the men in charge of coal-ing trestles become quite efficient in arriving at approximateactual figures of the number of tons of coal placed on eachengine. From the number of engines that are coaled each dayand from the fact that any discrepancies which exist at theclose of the month are reported to him, he is receiving a train-ing which fits him to be reasonably accurate in his daily record
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectrailroadengineering
