. Electric railway journal . ycle, 220-volt alternatingcurrent is used for operating the locomotives, and thisis supplied through an underground contact collecting device is adjacent to the running rail onthe side remote from the lock. It has T-rails whichform two legs of the three-phase circuit, the third legbeing formed by the main track rails. A specially de-signed contact plow slides between the two T-rails andtransmits the current to the locomotive, to which it isflexibly connected. The locomotives, which were described in the ElectricRailway Journal for April 11, 1914, are equ
. Electric railway journal . ycle, 220-volt alternatingcurrent is used for operating the locomotives, and thisis supplied through an underground contact collecting device is adjacent to the running rail onthe side remote from the lock. It has T-rails whichform two legs of the three-phase circuit, the third legbeing formed by the main track rails. A specially de-signed contact plow slides between the two T-rails andtransmits the current to the locomotive, to which it isflexibly connected. The locomotives, which were described in the ElectricRailway Journal for April 11, 1914, are equippedeach with two 75-hp slip ring induction motors. Eachof these, with all its gearing and clutches, is mountedupon the wheels independent of the frame of the loco-motive, to which it is connected only by the connection with each motor a powerful brake isinstalled; and, as the motors are at all times gearedeither to the axles or to the cog wheels, the truck wheelsare not provided with any brake rigging. The brake. ELECTRIC TOWING AT PANAMA—VIEW OF LOCOMOTIVE WITH CAB AND SIDE HOUSING REMOVED January 30, 1915] ELECTRIC RAILWAY JOURNAL 237 is operated through a solenoid which is in circuit withthe controller of the motors, so that when the currentis turned on to energize the motor windings the sole-noid will lift its core and thereby release the first point of the controller raises the brakes with-out applying power to the motors, thereby providinga coasting point. But should the motor current beshut off, either intentionally or accidentally, the corewill instantly drop by gravity, and its weight willexert a heavy pressure upon the brake levers to stopthe motor and the locomotive. During the first three months of commercial oper-ation of the Canal, from Aug. 15 to Nov. 15, the cargotowed through the locks by the locomotives amountedto 1,079,521 tons. During the fiscal year ending June30, 1914, the Panama Railroad had carried 643,178 tonsof through freight
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