. American engineer and railroad journal . Fig. Fig. 3. Fi. 5. COLUMBIAN ELECTRICXAR LIGHTING SYSTEM. December, 1890. AMERICAN ENGINEER AND RAILROAD JOURNAL. 401 generator support at tbe sleeve Is made by means of spring buffers, appearing on top of the axle In Figs. 3 and 1. The Ingenious pole changing device appears in Kig. 4. Theend of the dynamo shaft carries a worm which drives a shorthorizontal shaft upon which a reverse, screw thread, cylindricalcam is mounted. The pole changing switch has six pointsand the direction of the current is changed upon the reversalof the direction of mot
. American engineer and railroad journal . Fig. Fig. 3. Fi. 5. COLUMBIAN ELECTRICXAR LIGHTING SYSTEM. December, 1890. AMERICAN ENGINEER AND RAILROAD JOURNAL. 401 generator support at tbe sleeve Is made by means of spring buffers, appearing on top of the axle In Figs. 3 and 1. The Ingenious pole changing device appears in Kig. 4. Theend of the dynamo shaft carries a worm which drives a shorthorizontal shaft upon which a reverse, screw thread, cylindricalcam is mounted. The pole changing switch has six pointsand the direction of the current is changed upon the reversalof the direction of motion of the car by means of a pinwhich engages the cam thread below the switch. This pin Ispressed Into tlie slot in the cam by a spring, and the slotchanges in depth in such a way as to throw the pin to theopposite end of the threaded slot upon the reversal of thedirection of motion of the cam. This feature Is shown in thephotograph, but Is obscured by the necessary reduction inthe engraving. It is sufficient to say that the pole changing isaccomp
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectrailroadengineering
