. Electric railway journal . No. 11. KTUTTAL ¥ ,1 Y Pittsburgh JLt,. No. 14. September 22, 1917] ELECTRIu RAILWAY JOURNAL Railway Motor Gearing Heat Treated Gearing It is to Heat Treated Gearing that Electric Railways /owe much. The alloy steels that have the necessary phy- asical qualities for electric railway gearing are prohibitive £in price. Therefore Heat Treated Gearing was devel- %ioped and has taken a place of undisputed value in theElectric Traction World. Conditions that made necessary heat treated gearing made necessary a higher standard ofheat treatment and this demand was successf
. Electric railway journal . No. 11. KTUTTAL ¥ ,1 Y Pittsburgh JLt,. No. 14. September 22, 1917] ELECTRIu RAILWAY JOURNAL Railway Motor Gearing Heat Treated Gearing It is to Heat Treated Gearing that Electric Railways /owe much. The alloy steels that have the necessary phy- asical qualities for electric railway gearing are prohibitive £in price. Therefore Heat Treated Gearing was devel- %ioped and has taken a place of undisputed value in theElectric Traction World. Conditions that made necessary heat treated gearing made necessary a higher standard ofheat treatment and this demand was successfully met with B P Treatment. This treatment isapplied to gearing cut from forged steel and which unites the already compact constructionstill more closely. The result of this is a gear that will stand up under the severest serviceconditions, reducing maintenance costs, frequent delays due to replacements and giving a lifeof 4 times that of untreated cast steel in identical service conditions. Below are shown cuts illustrating the difference in construction betwee
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