An Improved Method of Controlling the Trolley Poles of Electric Cars and the like

摘要

25,415. Henshaw, S., and Swindells, J. Dec. 7. Collectors.-A trolly boom, on leaving the line falls clear of the overhead construction by its own weight. The extension h of the hinged polesocket f carries a knuckle-jointed nose j, on which the inner arm of a hand-lever k bears under the pressure of a roller n. This roller moves in slots o in the revolving standard-cap m, and forms the movable abutment of the spring q, which holds the trolly up. Should the trolly leave the line and. rise, the lever k is drawn down clear of the nose j, and the boom then falls. The extent of its fall is limited by the abutment on the standard a of the end of the arm r, one or more slots and teeth being provided to prevent its subsequent rotation. The teeth may be replaced by leather or other frictional surfaces. The trolly is replaced by pressing down the lever l until the arm k rises above the pivoted nose j, whereupon the boom may be raised for travelling in the selected direction. The lever l alao serves to reverse the trolly pole, the usual cord being dispensed with.