. American engineer and railroad journal . neper 844 miles (the stays being 11-16-In. copper and the boilerpressure 200 lbs. per square inch). The 10 latest engines ofthis type are making a still better showing. Of the severaldifferent alloys of copper with zinc, tin and aluminum that hadbeen tried there had been no improvement over the copper,except perhaps the 9-per cent, zinc alloy; in tests of the alloysthe aluminum alloy had been found non-homogeneous, varyinggreatly In structure from small to large crystals. Rivetingover the stay in the copper plate was found by sectioning sucha joint to
. American engineer and railroad journal . neper 844 miles (the stays being 11-16-In. copper and the boilerpressure 200 lbs. per square inch). The 10 latest engines ofthis type are making a still better showing. Of the severaldifferent alloys of copper with zinc, tin and aluminum that hadbeen tried there had been no improvement over the copper,except perhaps the 9-per cent, zinc alloy; in tests of the alloysthe aluminum alloy had been found non-homogeneous, varyinggreatly In structure from small to large crystals. Rivetingover the stay in the copper plate was found by sectioning sucha joint to expand the hole and injure the plate, thus makingthe joint Imperfect, so that Mr. Webb concludes that the stay,whatever the material, should be softer than the plate for agood Joint. A TOOL FOR PLANING TIN. Ordinary planer tools will run while cutting tin unless thechip is very light. At the Baldwin Locomotive Works a newtool of the form shown in this engraving was developed foruse on locomotive crossheads, which are now generally fitted. Showing Cutting-Edges of Tool. with tin bearing surfaces. This tool takes a very large chipwithout the least difficulty, and leaves a good surface. It iseasily ground, and not difficult to make. It is made hollowto avoid trouble in hardening. The cutting edges are markedby crosses in the engraving. From what I have seen of the steam turbine, I see a greatfuture before it, and the reciprocating engine has got to lookout for itself. Here you have something that you can placealmost upon the floor, no matter what its size is. You do notrequire any particular foundation; the vibration is almostnothing; the room taken is very small, and the economy isabout equal to the maximum of other forms of engines nowand is likely to be increased.—F. ^f. Dean, before New Eng-land Railroad Club. 244 AMERICAN ENGINEER AND RAILROAD JOURNAL. A LARGE SHAY-PATENT LOCOMOTIVE. The El Paso & Rock Island Route. Heaviest Geared Locomotive Ever Built. The accompanying e
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectrailroadengineering
