File:The street railway review (1891) (14574668037).jpg

Identifier: streetrailwayrev01amer (find matches)
Title: The street railway review
Year: 1891 (1890s)
Authors: American Street Railway Association Street Railway Accountants' Association of America American Railway, Mechanical, and Electrical Association
Subjects: Street-railroads
Publisher: Chicago : Street Railway Review Pub. Co
Contributing Library: Carnegie Library of Pittsburgh
Digitizing Sponsor: Lyrasis Members and Sloan Foundation

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Text Appearing Before Image:
;iif;R-lframe is of wr\ simple design, well insulated and easihaccessible In openings provided with water-tight lids.It will be seen from the cuts that the weight of themagnet frame is counterbalanced and cushioned upon twopowerful spiral springs which rest upon the cross bars ofthe truck. These sjirings prevent the field from rotatingand give tlu motor the necissarv llexibilitx- for easystarling. Ilu total depth of the •■ Ironclad (jearless working etliciency of o\c-r 90 jier cent. It is also pro\enby the tact that, after two hours run with a load of overJO II. P. the ri.se in the temperature of the armature andfield coils was only jjo degrees centigrade above the .sur-rounding air. All sparking is avoided bv the excellentI^lectrical design. This form of motor is naturallv entireh-free from leakage and external magnetism. On accountof the absent of gears, it mav safeK he stated that atleast 5 11. P. )ier tar is saved o\er the double reduction ^ motors, thereby diminish- ^ DDnun a
Text Appearing After Image:
motor is but 20 inches. gi\ing 5 inches clearance betweenthe bottom of the motor and the rail, with a 30-inch wheel.One point of great importance is the ease and rapiditywith which these motors can be changed. In case ofaccident, one end of the car body may be raised by meansof jacks and b)* simply unscrewing two nuts, the motorcan be tolled out on its wheels, and a complete motor.which may be kept tested in the car-house for that pur-pose, can be rolled into its place. The fields of the moloi; ing coal bills, or allowingmore cars to be operatedb\ the same generatingcapacity; or in otherwords, requiring less gen-erating capacity for agixen number of cars.The wear and tear andm a i n t e n a n c e on carsequipped with the.se mo-tors will be enormouslyreduced on account of thelow speed of the wearingparts, small inertia of the _ armature and the low peripheral speed of com-mutator. The comparati\ely light weight of theequipment, dispensing with the weight of an elaboratetruck, is a poin

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