. The Street railway journal . .003of an ohm, that of the fields ohms, while the efficiencyis about 94 per cent. The generators are insulated byrunning the base frame bolts into a mixture of sulphur,glass and pitch set in porcelain insulators filled with oil,and cemented into the foundations. The bolts themselvesare insulated by wooden blocks and leather washers. The switchboard shown in the background of theillustration of the engine and dynamo room carries threerheostats, three 200 ampere ammeters, one 550 volt volt-meter, three main switches, six 200 ampere cut-outs, fourlightning arres
. The Street railway journal . .003of an ohm, that of the fields ohms, while the efficiencyis about 94 per cent. The generators are insulated byrunning the base frame bolts into a mixture of sulphur,glass and pitch set in porcelain insulators filled with oil,and cemented into the foundations. The bolts themselvesare insulated by wooden blocks and leather washers. The switchboard shown in the background of theillustration of the engine and dynamo room carries threerheostats, three 200 ampere ammeters, one 550 volt volt-meter, three main switches, six 200 ampere cut-outs, fourlightning arresters with magnetic blowout, a differentialvoltmeter for parallel working, and three magnetic circuitbreakers. The line is divided up into sections so thateach part may be cut out as desired for test or repairs. The feeders and return run from the station to thePiazza Manin, a distance of 1,367 yds., in two cables con-taining four m. m. wires each, on poles erected forty-four yards apart. Of the eight wires, four are return. FIG. 1—INTERIOR OF STATION—ELECTRIC RAILWAY AT GENOA, ITALY. wires and are soldered to the rails, while four are carriedto the trolley wires. The rails are of the Phoenix channeled girder typeset on ties in a massive granite pavement. The line inthe Via Assarotti is single track throughout with the ex-ception of one turnout. The return is provided for by acareful bonding of each rail with a copper band securelyriveted. So perfect is the return that no trouble hasbeen experienced with the telephone or telegraph service,although their earth plates are occasionally very near thestreet railway wires. The span wire supports in the city are of ornamentalcast iron, and are fixed to the walls of the houses by acircular iron plate and four bolts, the insulation betweenthe support proper and the house being obtained by twocreosoted cones of wood. Each support carries also aporcelain skirted insulator, to which is attached the spanwire. In places where poles ar
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Keywords: ., bookcentury1800, bookdecade1880, bookidstreetrailwa, bookyear1884
