. The Street railway journal . carried on extending over sixty-six railways in forty-ninecities, using not less than 7000 railway motors, revealed the factthat whereas the life of cast iron gears is somewhat over 30,000miles, that of steel gears is nearly twice as great. Apart from the advantages of longer life and higher efficiencyit was also found that with steel gears the danger of their breakingwas nmch than with iron gears and consequent springing andbreaking of shafts and frames nuich less liable to STEEL GEAR. The metal selected by the General Electric Company for itsgears
. The Street railway journal . carried on extending over sixty-six railways in forty-ninecities, using not less than 7000 railway motors, revealed the factthat whereas the life of cast iron gears is somewhat over 30,000miles, that of steel gears is nearly twice as great. Apart from the advantages of longer life and higher efficiencyit was also found that with steel gears the danger of their breakingwas nmch than with iron gears and consequent springing andbreaking of shafts and frames nuich less liable to STEEL GEAR. The metal selected by the General Electric Company for itsgears is a strong, close, homogeneous steel, especially free fromblow holes and possessing excellent working qualities. The teethare cut out of the solid stock by finely made cutters of a shape de-termined by a great number of exhaustive experiments. The gearcutting machines used are both elaborate and expensive and are ofunusually heavy design and accurate workmanship to turn out uni-form gears. Each gear is rigidly inspected and subjected to severetest before leaving the factor}. The railway motor pinions are made from best hammered steelforgings, the teeth being cut with machinery giving the same accu-racy as with the gears. Tests of similar rigidity are applied tothem. The State Board of Railroad Commissioners, of New York,has decided to grant the franchise to the Third Avenue RailroadCompany, permitting it to build an electric railway on the Kings-bridge Road, to be operated by the overhead trolley system. The
Size: 1656px × 1508px
Photo credit: © Reading Room 2020 / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1800, bookdecade1880, booksubjectstreetr, bookyear1884
