. The street railway review . its as it allows repair men more room to get up between thecircuits. The insulator fastenings consist of malleable iron pins clamped tothe cross arms by means of U-bolts threaded through the body ofthe pin, and held by a plate fitting over the U-bolts and against thecross arm. This type was first used on this transmission line andrepresents a new departure in pin design, inasmuch as by its use aliboring of the cross arm is avoided. The straight line insulators are 6A in. in diameter and 5 in. of porcelain in two parts cemented together. The insulatorswhi
. The street railway review . its as it allows repair men more room to get up between thecircuits. The insulator fastenings consist of malleable iron pins clamped tothe cross arms by means of U-bolts threaded through the body ofthe pin, and held by a plate fitting over the U-bolts and against thecross arm. This type was first used on this transmission line andrepresents a new departure in pin design, inasmuch as by its use aliboring of the cross arm is avoided. The straight line insulators are 6A in. in diameter and 5 in. of porcelain in two parts cemented together. The insulatorswhich arc colored with a brown glaze, were designed particularlyfor the conditions here imposed. The pin and insulator togethercarry a 250, cable 64 in. above the cross arm. The tiesare made of ordinary soft copper wire, tied on top. The strain insulators are of the spool type and made in onepiece 7/2 in. in diameter and 8 in. high. Each strain insulator hastwo petticoats, one above and one below the point where the wire. SWITCH AND CIRCUIT BREAKER HOUSE FOR THIRD-BAIL CIRCUITS. is attached. A 1 J/jj-in. by I2-in. steel pin is cemented in the centerof the insulator, and this steel pin rests in sockets at the top andbottom which are firmly clamped by U-bolts to the cross arms. The insuators were cemented to the pins before erection. Thecement used throughout was composed of litharge moistened with amixture of glycerine and water. After careful trias this type ofcement was found to be preferable to Portland cement transmission cables arc of section stranded cop-per and are fastened to the insulators with ties of No. 6 copperwire, 3 ft. long. The cables were strung for the most part by means of teams of horses and running lines of ft. or more in cable reels heme mounted on stationary stands 1 in the trestle,however, the reel of wire was carried on a rial car upon which was a 1 111, capahl. of being swung to on,- id( < thi end of th
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Keywords: ., book, bookcentury1800, bookdecade1890, booksubjectstreetrailroads
