. Railway mechanical engineer . ager was equipped withthe automatic valve shown in Fig. 5. A lj<2-in. three-way 168 RAILWAY MECriAXICAL ENGINEER Vol. 92, Xo. 3 cock carrying a two-arm tappet is cut into the feed pipeand til is tappet is acted upon to operate the valve by anarm pivoted on the frame and connected with the upper the latter rises and falls, the outer end of the arm isrocked slightly in the opposite direction and operates thethree-way cock. The points of contact of the end of thearm and the tappet consist of hardened steel spring plun-gers to eliminate wear. The machine o
. Railway mechanical engineer . ager was equipped withthe automatic valve shown in Fig. 5. A lj<2-in. three-way 168 RAILWAY MECriAXICAL ENGINEER Vol. 92, Xo. 3 cock carrying a two-arm tappet is cut into the feed pipeand til is tappet is acted upon to operate the valve by anarm pivoted on the frame and connected with the upper the latter rises and falls, the outer end of the arm isrocked slightly in the opposite direction and operates thethree-way cock. The points of contact of the end of thearm and the tappet consist of hardened steel spring plun-gers to eliminate wear. The machine operates at ai)out MX)strokes per minute and has given hardly any trouble sinceits installation about three years ago. CUTTER The special bolt cutter illustrated in Fig. 6 was designedfor turning and cutting the taper thread under the buttonhead of a radial staybolt. This machine was originally alyi-in. double head bolt cutter of standard design and wasrebuilt by the writer for the purpose mentioned. As can bt. Fig. 4—Superheater Flue Swager seen from the illustration, each spindle is provided with areversible gear and a clutch drive mounted on a steel platesuperstructure. The die heads are arranged to be openedby hand liy the lever at the side of each head. The topend of the staybolt is guided b>- an interchangeable sleevein the spindle. Four of these sleeves are provided to takecare of all sizes of staybolts from lys-in. to l-;8-in. andof any length. One end of the sleeve has a plain hole andthe other end a threaded hole of the respective size of thebolt to be guided. The die heads used are known as theCook die head, manufactured by the Detrick & HarveyCompany, Baltimore, Md. This type of head is particu-larly adapted for the work. The left hand head is equippedwith plain cutters which convert it practically into a hollow-mill or box tool. The right hand head contains the thread-ing dies. The automatic knock off on the die heads is notused, because the
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectrailroadengineering
