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Show DANGER SIGNAL AT CROSSING Startling Automatic Device Gives Warning of Approaching Trolley Car at Crowded Corner. Where three streets come together at one place the crossing is sure to be dangerous, particularly if trallic is heavy and there is a trolley line. A startling danger signal has been invented for such a crossing. It stands on a corner that the cars pass, and Is so connected with the track thnt when I xv.'x;o :x??rxr3ir x xcVi X X XF ( x pv , X f x- fit. V,? ' " x, X f SCZS - X xNj;. x, 1 t NSW.-'.-. ! . t:r"v " . x ' X. t i -i i Arm at Top of Signal Post Revolves and Large Gong Sounds at Approach of Trolley Car. a car approaches the arm at the top revolves into an outstretched position and a largo go g sounds. The signal itself it painted In r.tartling colors, like a camouflaged ship. Popular Science Monthly. |