. Electric railways, theoretically and practically treated . Fig. 45. — G. E. 66 RAILWAY MOTOR. The armature is wound with a two circuit winding,the standard fomi adopted by the Westinghouse slot contains three individual coils wound togetherand thoroughly insulated. The conductors are retained inposition by steel band wires which are depressed into thecore to prevent ripping should babbit in bearings melt andarmature strike pole tips. The weight of the armature andcommutator complete is 720 lbs. The commutator is composed of 117 hard drawn cop-per segments, insulated with mica. D
. Electric railways, theoretically and practically treated . Fig. 45. — G. E. 66 RAILWAY MOTOR. The armature is wound with a two circuit winding,the standard fomi adopted by the Westinghouse slot contains three individual coils wound togetherand thoroughly insulated. The conductors are retained inposition by steel band wires which are depressed into thecore to prevent ripping should babbit in bearings melt andarmature strike pole tips. The weight of the armature andcommutator complete is 720 lbs. The commutator is composed of 117 hard drawn cop-per segments, insulated with mica. Due to the large size DIRECT CURRENT SERIES RAILWAY MOTOR. 83 of commutator this motor is not subject to flashing over, acharacteristic of small armatures. The motor is of the split frame type, the halves of the. Fig. 46. — WESTINGHOUSE No. 56 RAILWAY MOTOR. 84 ELECTRIC RAILWAYS. yoke being hinged together, so that with the removal offour bolts, the motor frame may be swung apart, permit-ting access to the motor body. See Fig. 46. The field frame is composed of cast steel, to which isbolted four removable pole pieces of laminated steel. Thefield coils are wound upon moulds. They are thoroughlyinsulated before inserting into position, and are retainedin place by the spreading of the pole tips. The motorweighs 2,680 lbs. The type of suspension employed is amodification of the cradle method. Gearless Motor. — A special type of gearless railwaymotor has been developed by the General Electric Com-pany for the N. Y. C. & H. R. , to be used in con-nection with electric locomotives. These motors each havea capacity of 550 h. p. Each locomotive is equippedwith four motors producing a nominal rating of 2,200 h. laminations of the armatures of the motor are mountedupon a quill casting w
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