. The Street railway journal . FIG. 6.—PORTABLE PNEUMATIC REAMER These dams consist of aluminum castings padded with asbestoscloth. From the above description it will be seen that this joint com-bines the characteristics and advantages of both classes of jointsmentioned above, obviating their defects. While it is a permanentjoint, in that it holds the ends of the rails permanently together, it present. We will only say that, after a thorough test by an electricalexpert of this city of joints that had been in the ground over twoyears, and under the heaviest traffic, the resistance was found tob
. The Street railway journal . FIG. 6.—PORTABLE PNEUMATIC REAMER These dams consist of aluminum castings padded with asbestoscloth. From the above description it will be seen that this joint com-bines the characteristics and advantages of both classes of jointsmentioned above, obviating their defects. While it is a permanentjoint, in that it holds the ends of the rails permanently together, it present. We will only say that, after a thorough test by an electricalexpert of this city of joints that had been in the ground over twoyears, and under the heaviest traffic, the resistance was found tobe less than the rails themselves. Another, and we think a very im-portant, feature of this joint is the fact that its initial cost is prac-tically a permanent investment. From the nature of its construc-. FIG. 7.—PORTABLE PNEUMATIC RIVETER can be easily taken apart and the parts replaced at a comparativelysmall expense. It does not distort the original cross-section of therail, nor does it effect the physical or chemical nature of the not only obviates the initial defects in the fit of the rolled sec-tion, but also the aggravating cause—that of linear movement, dueto expansion. As the plates and rails are thoroughly cleaned andheated before the molten zinc is poured in, the latter galvanizes onto the steel (this was proved on joints that were purposely opened tion, having an intermediate soft metal between the surface of thesteel, the plates cannot be affected by wear, and, therefore, prac-tically the entire material that enters into the construction of thejoint—that is, the plates and zinc—can be used over again after therails have bee» worn out, only necessitating new rivets. Before describing the other improvements in track construc-tion, we think that it will be i
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Keywords: ., bookcentury1800, bookdecade1880, booksubjectstreetr, bookyear1884
