Resilient mounting for a rail on its support

A resilient mounting for a rail having a base flange resting on a support, said mounting comprising flexible liner means interposed between said base flange and said support and first and second rail clamp means respectively mounted on said support and engaging opposite sides of the base flange and each of said rail clamp means comprising:

• (a) flexible rail restrainer means formed of material having essentially the same physical characteristics as nylon and having an upper surface and a lower surface with the lower surface engaging the upper surface of the base flange of a rail;
• (b) a spring plate having upper and lower surfaces overlapping said flexible rail restrainer means and having a longitudinal edge overhanging inwardly beyond the portion of the rail restrainer engaging the base flange of the rail;
• (c) clamping means extending through said flexible rail restrainer means and the spring plate for providing a downward clamping force to said spring plate;
• said longitudinal edge of said spring plate being parallel to and spaced above said rail and including an outer edge remotely positioned transversely from said base flange, wherein said longitudinal edge, in the unclamped state of the plate, is bowed in a plane parallel to the longitudinal axis of the rail but assumes a planar orientation upon actuation of said clamping means so that its lower surface flatly contacts the upper surface of the portion of the flexible rail restrainer means engaging the base flange so that the flexible rail restrainer forcefully engages the base flange to provide enhanced resistance to longitudinal movement of the rail.