. The Street railway journal . FIG. 2, -END VIEW OF ARMATURE AND MOTOR,ONE COIL IN PLACE. SHOWING heavy clamps insulated with mica covers for the fulldepth of the bars, thus making it practically impossiblefor a bar to work loose or become high. The attach-ment of the commutator is secured by four machine boltsfitting in T slots in a projection of the armature method does away with keys, keyways and loosecommutators. The armature shaft is of steel, two and one sixteenthinches in diameter and is pressed into the bearing sleeves,which are made of hardened steel four and a half inches
. The Street railway journal . FIG. 2, -END VIEW OF ARMATURE AND MOTOR,ONE COIL IN PLACE. SHOWING heavy clamps insulated with mica covers for the fulldepth of the bars, thus making it practically impossiblefor a bar to work loose or become high. The attach-ment of the commutator is secured by four machine boltsfitting in T slots in a projection of the armature method does away with keys, keyways and loosecommutators. The armature shaft is of steel, two and one sixteenthinches in diameter and is pressed into the bearing sleeves,which are made of hardened steel four and a half inchesin diameter by five and a half inches long for pinion end,and four inches long for the commutator end. The field magnet and frame consists of but twocastings, has six poles, three consequent and three salient,and carries three field coils, which are wound with a wireof rectangular section. The lower half of the field magnet. FIG. 3.—SIDE VIEW OF FIELD MAGNET FRAME. may be swung back on eyebolts out of the way by simplytaking off two nuts, thus allowing access to the field coilsand armature. The armature may then be lowered intothe pit by unscrewing four cap bolts. It is not necessaryto remove the brushholders or disconnect any of thecables to get out an armature. The ease of removing thearmature and field coils was made an especial study in thedesign of this motor. The side arms carrying the armature and axle brasses 164 THE STREET RAILWAY JOURNAL. [Vol. X. No. 3. are heavily ribbed, have large grease boxes cored in themand are cast integrally with the upper half of the fieldmagnet. Ordinary standard machine bolts have beenused throughout, where it has heretofore been customaryto use cap screws, so that in case of breakage, it is notnecessary to drill and tap out, but is only a minutes workto put in a new bolt. All bolt heads fit into squaresockets, and National nut locks are used under the bru
Size: 1688px × 1481px
Photo credit: © Reading Room 2020 / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1800, bookdecade1880, bookidstreetrailwa, bookyear1884
