. The Street railway journal . UND; THEY ARE CROSSED FARTHER POLE LINE AT RIGHT. ported and moved along on rollers resting on the contact-railand the outside track rail. At every other joint in the contact-rail the aluminum feederrod is tapped in. The top consists of an aluminum castingbored to fit the rod, with a piece of No. 0000 extra flexiblecopper cast into it, the whole being hydraulically squeezed intothe rod. The two ends of the flexible copper are soldered tothe ends of the rails at the joint, and the whole covered withasphaltum paint. In this manner every rail is bonded t
. The Street railway journal . UND; THEY ARE CROSSED FARTHER POLE LINE AT RIGHT. ported and moved along on rollers resting on the contact-railand the outside track rail. At every other joint in the contact-rail the aluminum feederrod is tapped in. The top consists of an aluminum castingbored to fit the rod, with a piece of No. 0000 extra flexiblecopper cast into it, the whole being hydraulically squeezed intothe rod. The two ends of the flexible copper are soldered tothe ends of the rails at the joint, and the whole covered withasphaltum paint. In this manner every rail is bonded to thealuminum feeder; hence, a defective bond is not considered 10 serious. The odd joints of the contact-rail between the feedertaps are bonded with Chase-Shawmut bonds, these also beingpainted with asphaltum paint. The aluminum rod was laid toa temperature gage, loose on the insulators, as may be noticedin the views of the tra:k. About every half mile the feedersare crossed so as to equalize the pressure. During cold weather. GRINDING TRACK RAIL FOR BONDING the feeder rods are comparatively straight, but during warmweather they expand and creep in toward each other, in manycases actually touching, as may be noted in the illustrationof this feature, herewith reproduced from a photograph of theline. In this picture the rods come together in the foreground,
Size: 1544px × 1618px
Photo credit: © Reading Room 2020 / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1800, bookdecade1880, booksubjectstreetr, bookyear1884
