. The Street railway journal . GEARING FOR WINDING ARMATURES. Trolley wheels, trolley harps and journal bearings aremade in the companys own brass foundry. Trolley ears14 ins. long cost 16^ cents apiece. Armature bearings havea composition of 80 per cent copper, 12 per cent lead, and4 per cent each of phosphorus tin and pig tin, and show alife as high as three years. The journal bearings are boredin special design jig, which bolts on to the carriage of alathe, using a boring bar with four cutters, viz.: A cutterat each end for facing the ends of brasses, a roughing cut-ter, which roughs out th
. The Street railway journal . GEARING FOR WINDING ARMATURES. Trolley wheels, trolley harps and journal bearings aremade in the companys own brass foundry. Trolley ears14 ins. long cost 16^ cents apiece. Armature bearings havea composition of 80 per cent copper, 12 per cent lead, and4 per cent each of phosphorus tin and pig tin, and show alife as high as three years. The journal bearings are boredin special design jig, which bolts on to the carriage of alathe, using a boring bar with four cutters, viz.: A cutterat each end for facing the ends of brasses, a roughing cut-ter, which roughs out the work, and a finishing cutter,
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Keywords: ., bookcentury1800, bookdecade1880, bookidstreetrailwa, bookyear1884
