. American engineer and railroad journal . FIG. 4. DIES AND HEADER FOR VACUUM RELIEF VALVE. PUNCH AND DIE FOR SHEARING BRAKE LEVERS. May, 1907 AMERICAN ENGINEER AND RAILROAD JOURNAL. 193 The vacuum relief valve shown in Fig. 4is made from i-in. steel bar in two opera-tions. The valve is first headed similar to around head pin and the stock is sheared off tothe desired length. It is then heated and atone stroke of the machine is completed bymeans of the dies and header shown in theillustration. The valve is half a pound lighterthan the standard brass valve used for thispurpose. A punch and die
. American engineer and railroad journal . FIG. 4. DIES AND HEADER FOR VACUUM RELIEF VALVE. PUNCH AND DIE FOR SHEARING BRAKE LEVERS. May, 1907 AMERICAN ENGINEER AND RAILROAD JOURNAL. 193 The vacuum relief valve shown in Fig. 4is made from i-in. steel bar in two opera-tions. The valve is first headed similar to around head pin and the stock is sheared off tothe desired length. It is then heated and atone stroke of the machine is completed bymeans of the dies and header shown in theillustration. The valve is half a pound lighterthan the standard brass valve used for thispurpose. A punch and die for shearing brake leversare shown in Fig. 5. These tools have beenused on one of the large bulldozers for a con-siderable time. They are made of cast ironand faced with steel plates. Commercial bariron is ordered of the proper length for thelevers and of a width equal to the widest lever is formed with one stroke of themachine with only a small waste of PNEUMATIC TOOL HOLDER FOR WHEEL LATHE. The accompanying illustrations show a pneumatic attachmentfor holding the cutting tools on a driving wheel lathe, which isgiving very satisfactory service in the Grand Rapids shops ofthe Pere Marquette Railway. This attachment was designed by Mr. F. C. Pickard, machineforeman of the shops, and by its use the time of changing toolsin the lathe has been reduced from an average of five minutesto one minute and in addition all difficulty with broken studs,slipping wrenches, etc., has been eliminated. When it is consid-ered that ordinarily the tools are changed five or six times while
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectrailroadengineering
