Show Round Spring Edges to Prevent Bumpy Motion Sometimes springs will wear in such a way that the car will ride with a peculiar bumpy motion. This occurs when the shorter leaves are formed so that the edge gradually wears a sec ROUND zsr-Cri LOWER EDGESxrga I difMMiP EDGE GROUND OFF N Rounding the edge at the lower eno of each leaf of the spring will pre vent wearing away a depression ir the leaf below and preserve smooth spring action even when riding ovei large bumps. tion of the leaf below it. When tht wheel strikes a bump slightly largei than normal the edge of the spring if forced to ride up over the corner ol the depression Worn in the lowei spring. The cure for this is to rounc the sharp edge at the lower end ol each leaf as shown in the illustration 1'opular Science Monthly. |