Abstract: The invention concerns a longitudinal transfer system made out of rail sections for guiding transport cars from one processing station to another, two adjacent rail sections being connected with one another mechanically and electrically. A connecting part and section strips are connected with one rail section incapable of sliding and with the other rail section with play but only so tightly that motion of the second rail section is possible, in particular as a result of expansion.

Abstract: A compound railroad track wherein the head rail is easily replaceable without replacement of the supports, which comprise two extruded mirror-image L-shaped members, periodically spaced U-shaped separators, and a base plate, all suitably bolted and welded together.

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 concrete sleeper for track systems incorporating electrical circuitry, in which sleeper electrically conducting cables are embedded, and therefore concealed therein, with an assembly to allow electrical connection between the cables and associated tracks and associated track side circuitry. In order to obtain connection to the track side circuitry a recess is provided in one end of the sleeper and receives a terminal box having contacts for contacting exposed ends of the embedded cables and connections within the terminal box are in turn connected to the track side circuitry. In order to achieve an electrical connection with the tracks the cables are connected, within the sleeper, to embedded parts of shoulders of rail fastening assemblies of the type marketed under the name PANDROL.

Abstract: In a third rail system for electric railroads, double T shaped third rails are used, the web of which has an internal longitudinal slot to receive the guide projections of support insulators and for the space saving mounting of electrical and mechanical connecting parts of fixed and/or expansion joints. With this slot design, good heat transfer and at the same time, a large mechanical moment of inertia are obtained.

Abstract: A smooth junction is provided between aluminum conductor rails at the power collection surface by the provision of a wedge shaped insert the geometry of which corresponds to that of the gap between the rails. On expansion of the rails the insert is pushed partly out of the gap and on contraction is forced into the gap by a spring or springs thus always providing continuity on the power transfer surface.