Abstract: A double tongue and groove rail expansion assembly is provided with ancillary equipment to limit dimensional flexing of a railroad track caused by instabilities in the underlying earthen surface, or variable work loads, or temperature changes effecting the longitudinal dimensions of the rails, or any and all combinations of such stresses. The ancillary equipment includes pushover assemblies for control of lateral and vertical forces, tieplate assemblies for control of longitudinal and vertical forces and an electrical bonding system to maintain electrical balance across the area of rail joinment.

Abstract: A railroad plate and connectable shim are disclosed for fastening railroad tracks over ground having a flat or raised topography in an economically feasible manner. The instant system provides a base plate with a sloping grooved channel for reception of the lower flange of a rail to be held in place in combination with a trapezoidal shim to insure the proper cant of the rail over the various topographical areas of the country. The instant base plate, trapezoidal shim, rail and railroad tie are all fastened via a set of screws which are angled or toed-in towards the center of gravity of the rail. Stepped washers, each possessing a thickened portion, are provided between the bottom of the screw head and the upper shoulder surface of the lower flanges, both inside and outside the central vertical portion of the rail. The washers are omitted in securing back assemblies to the ties where joints are formed between the ends of adjacent rails.

Abstract: A railroad plate and connectable shim is disclosed for fastening railroad tracks over ground having a flat or raised topography in an economically feasible manner. The instant system provides a base plate with a sloping grooved channel for reception of the lower flange of a rail to be held in place in combination with a trapezoidal shim to insure the proper cant of the rail over the various topographical areas of the country. The instant base plate, trapezoidal shim, rail and railroad tie are all fastened via a set of screws which are angled towards the center of gravity of the rail.