. The Street railway journal . the brushes down uponthe commutator. A suitable socket is provided in which one endof the cable terminal is sweated with solder. The commutatoris of generous proportions, nearly equal in diameter to the arma-ture. It is made from dropped forged copper and is set up undergreat pressure and heat by the well known Walker methods. Itmay be seen to good advantage in Fig. 6, a view of the com-pleted armature. The armature core is ventilated, an innovationin railway motors, which heretofore have been built with solidcores. Three ventilating slots are provided. The armat
. The Street railway journal . the brushes down uponthe commutator. A suitable socket is provided in which one endof the cable terminal is sweated with solder. The commutatoris of generous proportions, nearly equal in diameter to the arma-ture. It is made from dropped forged copper and is set up undergreat pressure and heat by the well known Walker methods. Itmay be seen to good advantage in Fig. 6, a view of the com-pleted armature. The armature core is ventilated, an innovationin railway motors, which heretofore have been built with solidcores. Three ventilating slots are provided. The armature coils August, 1898.] STREET RAILWAY JOURNAL. 465 arc formed of flat copper ribbon and arc shown in Fig. 7- Al-though Fig. 7 suggests a winding without lead, such is not thecase. The coils are led a proper amount to throw the brushes onan angle of 45 degs. with the horizontal. In the winding of thisarmature the Walker Company has abandoned its favorite method,of insulating the slots, and instead has put extra heavy insula-.
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Keywords: ., bookcentury1800, bookdecade1880, booksubjectstreetr, bookyear1884
