. Electric railways; a treatise on the modern development of electric traction, including practical instruction in the latest approved methods of electric equipment and operation . Strain Insulator. Brackets. In the bracket type of overhead construction, atrolley wire is fastened to brackets placed on poles near the construction is used on suburban and interurban lines wherethe presence of poles near thetrack is not has been found that a rigidconnection of the trolley wireto a bracket is likely to resultin the breaking of the trolley-wire insu-lators. For thisreason
. Electric railways; a treatise on the modern development of electric traction, including practical instruction in the latest approved methods of electric equipment and operation . Strain Insulator. Brackets. In the bracket type of overhead construction, atrolley wire is fastened to brackets placed on poles near the construction is used on suburban and interurban lines wherethe presence of poles near thetrack is not has been found that a rigidconnection of the trolley wireto a bracket is likely to resultin the breaking of the trolley-wire insu-lators. For thisreason the l)rackets now com-monly used provide for a flex-ible suspension of the trolley-wire hanger from the bracket employing suchflexible construction, madeby the Ohio Brass Company,is illustrated in Fig. OS. An example of standardstraight-line bracket con-struction is showni in Fio;. 09. Feeders. Where addi-tional conductivity is neededbeyond that furnished bv the . Fig. 68. Overhead Construction. trolley wire itself, feeders are run on insulators along the poles at the side of the track. Such feeders are connected to the trolley wire at regular intervals. Where. lb ELECTRIC KAILWAYS span-wire constriK-tion is used, the feed wire may he suhstituted forthe span wire at the pole where the connection hetween feed wireand trolley wire is made. In such a <;isr, of course, a trolley-wirehanger is used which .has no insulator, so that the current feeds Cr/K eeplnZi Note ..I Coins to be ^devp ^opoiesHake B
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