. Railway mechanical engineer . , lying about 3 ft. apart. A small third piecewas found inside the package. Both the brown and oiledpaper were badly torn and in the case of the latter a largeportion was reduced to pieces about 5:$-in. square. Thesteel was of good qualit) and the fracture shows a clean,new, honest break, resembling the feather figure usually seenin ice blocks. The area of the fracture was 24 sq. in. states, Without taking into consideration thegreatly increased tensile strength due to hardening, theinternal stresses tending to burst the bar may easily havebeen over 1
. Railway mechanical engineer . , lying about 3 ft. apart. A small third piecewas found inside the package. Both the brown and oiledpaper were badly torn and in the case of the latter a largeportion was reduced to pieces about 5:$-in. square. Thesteel was of good qualit) and the fracture shows a clean,new, honest break, resembling the feather figure usually seenin ice blocks. The area of the fracture was 24 sq. in. states, Without taking into consideration thegreatly increased tensile strength due to hardening, theinternal stresses tending to burst the bar may easily havebeen over 1,000 tons. It is curious that this tool, made forlioring out mold shapes for forming up high explosive ma-terial, should have itself exploded before doing any usefulwork. August, 1917 RAILWAY MECHANICAL ENGINEER 455 PNEUMATIC SHEARING MACHINE BY E. A. MURRAYMaster Mechanic. Chesapeake & Ohio. Clifton Forge. Va. The device for shearing coupler yoke rivets shown in theillustration can be made at slight expense and enables the. of carrying coupler yokes to the shear is quite base of the machine consists of two 9-in. I-beams andfour 9-in. channels to which are riveted two y^-in. steel]jlates. At one end of this frame is placed a yoke whichcarries two air cylinders, the upper one of which serves asa dash pot. The lower one is 20 in. in diameter and theupper 7J4 in- At the other end of the frame is bolted aheavy casting which serves as a fulcrum for the steel armwhich carries the shear and shear blade. Directly under theshear blade is bolted a block which serves as a support forthe coupler yoke when the rivets are being cut, the otherside of the yoke being held up at the same time by a movablebracket to which is attached a handwheel, which is at-tached to a screw. By tightening this screw after thecoupler is in position, it is impossible for the coupler toturn when the shear blade comes down upon it. The armto which the shear blade is attached is of steel. It has atr
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectrailroadengineering
