. 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 material.
Size: 1896px × 1318px
Photo credit: © Reading Room 2020 / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1800, bookdecade1890, booksubjectrailroadengineering
