. Electric railway journal . he armature to the ground end of the motor circuit willbe found effective in saving armatures from damageby lightning. Cutting in the lights during a storm will give agreater number of easy paths for lightning discharges,and at the expense of a light socket or lamp will oftensave the motor equipment. Avoid carefully all conditions similar to that in This sketch illustrates one of the disadvantages ofplacing the arrester underneath the car. Electric Track Switch Practice Features of Installation and Maintenance on TwoNew England Railways The Boston Elevated R
. Electric railway journal . he armature to the ground end of the motor circuit willbe found effective in saving armatures from damageby lightning. Cutting in the lights during a storm will give agreater number of easy paths for lightning discharges,and at the expense of a light socket or lamp will oftensave the motor equipment. Avoid carefully all conditions similar to that in This sketch illustrates one of the disadvantages ofplacing the arrester underneath the car. Electric Track Switch Practice Features of Installation and Maintenance on TwoNew England Railways The Boston Elevated Railway has about 300 Cheathamelectric track switches on its system. There are alsoeight Collins electric switches which have been installedcomparatively recently. During the past three years thirty-one new automaticswitches have been installed, and additions are beingmade from time to time as the volume of traffic atjunction points warrants the expense. The other factorwhich determines the advisability of installing a switch. MOTOR-OPERATED TRACK SWITCHES AT THE BUSIEST CORNERIN NEW ENGLAND of the automatic type is the amount by which the move-ment of traffic would be facilitated. On the ElevatedRailway trunk lines the use of electric switches is be-coming standard practice, as the cost of operating handswitches, together with the delay to traffic, makes theuse of them uneconomical, the total extra costs easilyexceeding the maintenance costs for electrically-operatedunits. The question whether an electric switch shall be in-stalled to supersede a hand-operated switch is finallydecided by the division superintendent. He makes therecommendation, which is passed upon by the superin-tendent of transportation or the superintendent oftraffic, or both in conjunction. The question of theseswitches is finally decided by the superintendent of wires. Maintenance is divided between the maintenance ofway department and the wire department. The formerrenews the links and lugs only; the latte
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