. The Street railway journal . Steel Pole Company, of NewYork, and is designed especially for trolley-wire service, thoughsimilar poles are also manufactured for electric light and powerlines and telegraph and telephone wires. It consists essentiallyof three high-carbon rolled-steel Ts or Us, formed in a tripodshape, and set in a cast-iron base in which they are keyed. Atthe head is a cap in which each of the three members is riveted,and between the cap and base are cast-iron spreaders, makinga positively rigid pole. Several advantages are claimed for this kind of pole. One is,that as the base
. The Street railway journal . Steel Pole Company, of NewYork, and is designed especially for trolley-wire service, thoughsimilar poles are also manufactured for electric light and powerlines and telegraph and telephone wires. It consists essentiallyof three high-carbon rolled-steel Ts or Us, formed in a tripodshape, and set in a cast-iron base in which they are keyed. Atthe head is a cap in which each of the three members is riveted,and between the cap and base are cast-iron spreaders, makinga positively rigid pole. Several advantages are claimed for this kind of pole. One is,that as the base is broad and contains a great proportion of theweight, the excavation required for setting is not as deep as thatneeded with a tubular pole. In fact it is stated that ample rigidityfor this pole in railway work is secured by setting it 3 ft. deep inconcrete. Again, the pole can be shipped and distributed un-assembled, and can be put together at the point of use. The tripartite poles were tested at Stevens Institute, Hoboken,. TRIPARTITE POLE N. September, 1899. with following results as an average oftwelve tests: 300-lb. strain, double reading declivity 400-lb. strain, double reading declivity 500-lb. strain, double reading declivity In every instance when the load was released the pole cameback to its original position. The weight of the poles is from350 lbs. to 700 lbs. New Cars for Cape Town Tramways The handsome car shown in the cut on the next page isone of a lot which the Cape Town Tramways have purchasedfrom the J. G. Brill Company, and which has just been details of construction embody the latest improvements incars of double-deck type. The bodies are 17 ft. long with making the car 27 ft. over the dashers. The width atthe sills is 6 ft. 10 ins., and at the posts a fraction over 7 ft. 4 leading to the upper deck are of the Brill pattern, whichin connection with the hood protect the motorman, while
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Keywords: ., bookcentury1800, bookdecade1880, bookidstreetrailwa, bookyear1884
