IMPROVED SPRING WING RAIL ROLLER HOLDDOWN ASSEMBLY

摘要

An improved railroad trackwork frog is provided with a relatively fixed rigid wi ng rail, a relatively movable spring wing rail, a base plate, and at least one roller outri gger and ramp plate assembly which is attached to the spring wing rail and to the base plate, and wh ich functions to cause limited upwards vertical movement of the spring wing rail relative to the base plate when the spring wing rail is moved laterally relative to the rigid wing rail by the engag ed wheel flange of a passing rail car.