. The Street railway journal . neshaft. The spider arms are hollow, to give the greateststrength with the given amount of material. The lamina-tions are thoroughly insulated from one another by meansof japan. The slot insulation consists of alternate layersof oiled muslin, paper and mica. The armature bars areof such a shape that the only joints occur at the commu-tator leads. That is, the bars have no joint at the flywheelend. The armature bars are held in position by means ofwooden wedges, thus doing away with binding wire overthe laminations. The commutator shell is supported on an extensio
. The Street railway journal . neshaft. The spider arms are hollow, to give the greateststrength with the given amount of material. The lamina-tions are thoroughly insulated from one another by meansof japan. The slot insulation consists of alternate layersof oiled muslin, paper and mica. The armature bars areof such a shape that the only joints occur at the commu-tator leads. That is, the bars have no joint at the flywheelend. The armature bars are held in position by means ofwooden wedges, thus doing away with binding wire overthe laminations. The commutator shell is supported on an extension ofthe armature spider, to avoid any possibility of movementbetween the commutator spider and the armature bars are hard-drawn copper, insulated from one an-other and from the spider with the best grades of selectedmica. The commutator is of such a size that a larg;e num- 270 ins.; length along shaft, 61 ins.; diameter of shaft, 27ins.; total weight, 180,000 lbs. The engine, which is a vertical cross-compound, non-.
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Keywords: ., bookcentury1800, bookdecade1880, booksubjectstreetr, bookyear1884
