TRACTORS

rticularly well suited for urban tramys, though objection has been taken it on the score of the unsightline curve the standards and overhead wires. when (3) Conduit Systems.—The currentsible straight aring conductor is here conveyed in a evolute nduit built below the surface of the LN of yund between the rails. A narrow a, and 4 midway between the rails and nning parallel to them gives acce ing ce ive the collector, which, pa ing down to z axis s conductor and up to the motor, supply of the ablishes contact for the curve, rrent. After pa ing through the to the tor the current is either returned > central station along a second conarea ctor, also placed in the conduit, or is ed out through the wheels and included through the rails. This type the ‘thed ents advantages where it is imaxes is rtant to avoid unsightly overhead uuctures, but is both expensive to install