. The Street railway journal . VIEW TAKEN WITH ARC HEADLIGHT of the many trestles on the Hackensack division of that line. Thelight is thrown a very long distance ahead, and by its means themotorman can easily distinguish any obstacle which may be on thetrack. +++ A New Contact Spring; for Trolley Harps The illustration herewith shows a new electrical contact springfor trolley harps, patent upon which has recently been granted toC. S. McMahan, of Chicago. The invention comprises a springof conducting material pivoted centrally on the pin of the harp,and adapted to press against the inner side
. The Street railway journal . VIEW TAKEN WITH ARC HEADLIGHT of the many trestles on the Hackensack division of that line. Thelight is thrown a very long distance ahead, and by its means themotorman can easily distinguish any obstacle which may be on thetrack. +++ A New Contact Spring; for Trolley Harps The illustration herewith shows a new electrical contact springfor trolley harps, patent upon which has recently been granted toC. S. McMahan, of Chicago. The invention comprises a springof conducting material pivoted centrally on the pin of the harp,and adapted to press against the inner side of the harp arm. Thedevice has three or more curved radial arms which bear against the trolley wheel near its periphery,at points equally spaced about thewheel. The usual washer is insertedbetween the spring and the harparm. The ends of the spring arms. washers and wheel are first placed approximately in position be-tween the harp arms and the pointed tapering rod passed throughto bring all parts to a common center, when the harp pin can beput in place without obstruction. The spring is applicable to any of the existing forms of trolleyharps. The chief advantages claimed for the device are: it requiresno riveting to the harp; it can be replaced in a moment withoutthe necessity of removing the harp from the trolley pole; it willprevent wobbling of the trolley wheel; it will wear longer than theold form, and, with its three or more points of connection withthe trolley wheel, largely increases the contact surface between thewheel and pole, a feature which is especially desirable on largecars using heavy current. A New Water Supply Pomp This pump is a new pattern, designed especially for water supplyor for use in places where the pressure or head against which pumpmust work is heavy. The steam cylinder is of Dean Brothers usualtype, with
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Keywords: ., bookcentury1800, bookdecade1880, bookidstreetrailwa, bookyear1884
