Identifier: cyclopediaofappl05amer (find matches)
Title: Cyclopedia of applied electricity : a general reference work on direct-current generators and motors, storage batteries, electrochemistry, welding, electric wiring, meters, electric lighting, electric railways, power stations, switchboards, power transmission, alternating-current machinery, telegraphy, etc.
Year: 1916 (1910s)
Authors: American Technical Society
Subjects: Electric engineering
Publisher: Chicago : American Technical Society
Contributing Library: Northeastern University, Snell Library
Digitizing Sponsor: Northeastern University, Snell Library

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361 264 ELECTRIC RAILWAYS other machine, about 100 tons in this case. The countershaftform of drive is entirely novel in this country, but as the side-rodconstruction permits the use of a high motor mounting, the centerof gravity of the locomotive is high and this is considered by manyengineers a matter of great importance. The high center of gravityallows the body to swing sidewise under the action of side forcessuch as are produced in rounding curves and this relieves the trackrails of strain. The motors of this locomotive are the largest which have beenused in railway work. Their general appearance is shown in Fig.
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Fig. 252. Side View of Pennsylvania Locuinutivc Motor 252 and that of the armature and commutator in Pig. 253. Themotor is of the series type with ten field poles and ten commutatingpoles. The commutating poles are small poles located between themain poles and furnishing an auxiliary magnetic field to assist inreversing the current as the armature coils pass under the brushes,at which time they are short-circuited for an instant. The motorsare located in the cab where they are free from dirt and dampnessso that the frames can be entirely open. This assists in ventilatingthe motors and permits them to carry their load without overheating. 362 ELECTRIC RAILWAYS 265 ALTERNATING CURRENT LOCOMOTIVES—SINGLE PHASEThe New Haven Qearless Locomotive. The New York, NewHaven and Hartford Railroad was one of the first to adopt electricityfor motive power on a large scale. This railroad took a radical stepin selecting alternating-current series motors for their locomotives.This type of motor perm

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