. The Street railway journal . Street Ry. Journal SECTIONS OF POWER STATION wedges. Another characteristic feature is the parallel-move-ment type of brush holder. On each one, four sets of copperleaves carry the current and control the movement of thebrush from or toward the commutator, always maintaining thesame angle with its surface. This causes the brushes to wearaway evenly, and as they become shorter allows them to beextended and clamped in a new position without altering thesurface of contact. To regulate the brush pressure there is ahelical spring, which, since it carries no current, i
. The Street railway journal . Street Ry. Journal SECTIONS OF POWER STATION wedges. Another characteristic feature is the parallel-move-ment type of brush holder. On each one, four sets of copperleaves carry the current and control the movement of thebrush from or toward the commutator, always maintaining thesame angle with its surface. This causes the brushes to wearaway evenly, and as they become shorter allows them to beextended and clamped in a new position without altering thesurface of contact. To regulate the brush pressure there is ahelical spring, which, since it carries no current, is less in-clined to heat and vary its tension. To compensate for anyinequalities among the magnetic circuits, the brush-holderarms may be shifted independently, and to secure the positionof sparkless commutation, when the various circuits are inequilibrium the entire rocker ring may be revolved by the handwheel. The engines are rated at 600 hp when supplied with steam at140 lbs. and running at their present speed, 120 r. p. m.
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Keywords: ., bookcentury1800, bookdecade1880, booksubjectstreetr, bookyear1884
