Hollow Switch Tie Assembly for Railway

Abstract

The disclosed solution generally relates to a hollow steel tie assembly for railway. The hollow steel tie assembly is generally configured to house switch machine components (e.g., switch rods). Further, the hollow steel tie assembly is configured with interface plates that enable the installation of varying configurations of rail fasteners. As such, the hollow steel tie assembly may be used for many types of rail, geometries, gauges, handedness, etc. Additionally, the hollow steel tie assembly is configured for use with existing as well as new switch machines. The hollow steel tie assembly comprises a shell configuration that provides ready access to internal components while maintaining support for top plates, rail fasteners, and attached rail. Further, the hollow steel tie assembly comprises electrically insulating layers in order to maintain electrical isolation between reciprocal rails.

Claims

1. A hollow switch tie assembly configured to be operatively connected to a plurality of rails, the hollow switch tie assembly comprising: a shell configured to be operatively connected to a plurality of support plates; the plurality of support plates configured to be operatively connected to a plurality of interface plates; and the plurality of interface plates configured to be operatively connected to the plurality of rails, wherein the plurality of interface plates comprises a first interface plate and a second interface plate, wherein the first interface plate comprises a first rail base support configured to be operatively connected to a first rail within the plurality of rails, wherein the second interface plate comprises a second rail base support configured to be operatively connected to a second rail within the plurality of rails.

2. The hollow switch tie assembly of claim 1, wherein the plurality of support plates is operatively connected to the shell via a first plurality of fasteners, wherein the first plurality of fasteners is semi-permanent.

3. The hollow switch tie assembly of claim 1, wherein the plurality of interface plates is operatively connected to the shell via a second plurality of fasteners, wherein the second plurality of fasteners is removable.

4. The hollow switch tie assembly of claim 1, wherein the first rail base support and the second rail base support are configured with different angular orientations, respectively.

5. The hollow switch tie assembly of claim 1, wherein the plurality of interface plates and the plurality of support plates have an H-shape.

6. The hollow switch tie assembly of claim 1, wherein the shell comprises a first plurality of areas being configured to accommodate one or more heating components, wherein the shell further comprises a second plurality of areas that provides elastic support for the plurality of support plates.

7. The hollow switch tie assembly of claim 1, the hollow switch tie assembly further comprising: a second plurality of support plates operatively connected to the shell, wherein the second plurality of support plates is rectangular; and a plurality of roller assemblies operatively connected to the second plurality of support plates.

8. The hollow switch tie assembly of claim 1, the hollow switch tie assembly further comprising: a first plurality of shims being metallic and non-electrically insulating; and a second plurality of shims being non-metallic and electrically insulating the plurality of support plates from the shell.

9. The hollow switch tie assembly of claim 1, the hollow switch tie assembly further comprising: a cover plate; and a plurality of cover plate fasteners operatively connecting the cover plate to the shell.

10. A kit configured for connecting a plurality of rails, the kit comprising: a switch machine; and hollow switch tie assembly, comprising: a shell configured to be operatively connected to a plurality of support plates; the plurality of support plates configured to be operatively connected to a plurality of interface plates; and the plurality of interface plates configured to be operatively connected to the plurality of rails, wherein the plurality of interface plates comprises a first interface plate and a second interface plate, wherein the first interface plate comprises a first rail base support configured to be operatively connected to a first rail within the plurality of rails, wherein the second interface plate comprises a second rail base support configured to be operatively connected to a second rail within the plurality of rails.

11. The kit of claim 10, wherein the plurality of support plates is operatively connected to the shell via a first plurality of fasteners, wherein the first plurality of fasteners is semi-permanent.

12. The kit of claim 10, wherein the plurality of interface plates is operatively connected to the shell via a second plurality of fasteners, wherein the second plurality of fasteners is removable.

13. The kit of claim 10, wherein the first rail base support and the second rail base support are configured with different angular orientations, respectively.

14. The kit of claim 10, wherein the plurality of interface plates and the plurality of support plates have an H-shape.

15. The kit of claim 10, wherein the shell comprises a first plurality of areas being configured to accommodate one or more heating components, wherein the shell further comprises a second plurality of areas that provides elastic support for the plurality of support plates.

16. The kit of claim 10, wherein the hollow switch tie assembly further comprises: a second plurality of support plates operatively connected to the shell, wherein the second plurality of support plates is rectangular; and a plurality of roller assemblies operatively connected to the second plurality of support plates.

17. The kit of claim 10, wherein the hollow switch tie assembly further comprises: a first plurality of shims being metallic and non-electrically insulating; and a second plurality of shims being non-metallic and electrically insulating the plurality of support plates from the shell.

18. The kit of claim 10, wherein the hollow switch tie assembly further comprises: a cover plate; and a plurality of cover plate fasteners operatively connecting the cover plate to the shell.

19. A hollow switch tie assembly configured to be operatively connected to a plurality of rails, the hollow switch tie assembly comprising: a shell configured to be operatively connected to a plurality of support plates; the plurality of support plates configured to be operatively connected to a plurality of interface plates, wherein the plurality of support plates is operatively connected to the shell via a first plurality of fasteners, wherein the first plurality of fasteners is semi-permanent; and the plurality of interface plates configured to be operatively connected to the plurality of rails, wherein the plurality of interface plates comprises a first interface plate and a second interface plate, wherein the first interface plate comprises a first rail base support configured to be operatively connected to a first rail within the plurality of rails, wherein the second interface plate comprises a second rail base support configured to be operatively connected to a second rail within the plurality of rails, wherein the plurality of interface plates is operatively connected to the shell via a second plurality of fasteners, wherein the second plurality of fasteners is removable.

20. The hollow switch tie assembly of claim 19, wherein the first rail base support and the second rail base support are configured with different angular orientations, respectively.

Description

BRIEF DESCRIPTION OF DRAWINGS

[0010] The accompanying drawings, which are incorporated herein and constitute part of this specification, illustrate exemplary aspects of the claims, and together with the general description given above and the detailed description given below, serve to explain the features of the claims.

[0011] FIG. 1A is a planar view of a hollow switch tie assembly, as shown from a top perspective.

[0012] FIG. 1B is a planar view of a hollow switch tie assembly, as shown from a front perspective.

[0013] FIG. 1C is a perspective view of a hollow switch tie assembly, as shown from a top perspective.

[0014] FIG. 2A is a planar view of a hollow switch tie assembly, as shown from a front, exploded perspective.

[0015] FIG. 2B is a planar view of a hollow switch tie assembly, as shown from a side, exploded perspective.

[0016] FIG. 2C is a perspective view of a hollow switch tie assembly, as shown from a top, exploded perspective.

[0017] FIG. 3A is a planar view of a hollow switch tie assembly, as shown from a front, exploded perspective.

[0018] FIG. 3B is a planar view of a hollow switch tie assembly, as shown from a front, exploded perspective.

[0019] FIG. 3C is a planar view of a hollow switch tie assembly, as shown from a side, exploded perspective.

[0020] FIG. 3D is a planar view of a hollow switch tie assembly, as shown from a side, exploded perspective.

[0021] FIG. 3E is a perspective view of a hollow switch tie assembly, as shown from a top, exploded perspective.

[0022] FIG. 3F is a perspective view of a hollow switch tie assembly, as shown from a top, exploded perspective.

[0023] FIG. 4A is planar view of a hollow switch tie assembly, as shown from a front, exploded perspective.

[0024] FIG. 4B is a planar view of a hollow switch tie assembly, as shown from a side, exploded perspective.

[0025] FIG. 5 is a perspective view of a hollow switch tie assembly, as shown from a top, exploded perspective.

[0026] FIG. 6A is a planar view of a hollow switch tie assembly, as shown from a top perspective.

[0027] FIG. 6B is a planar view of a hollow switch tie assembly, as shown from a top perspective.

[0028] FIG. 7A is a planar view of a shell, as shown from a side perspective.

[0029] FIG. 7B is a planar view of a shell, as shown from a side perspective.

DETAILED DESCRIPTION

[0030] Various aspects will be described in detail with reference to the accompanying drawings. Wherever possible, the same reference numbers will be used throughout the drawings to refer to the same or like parts. References made to particular examples and implementations are for illustrative purposes, and are not intended to limit the scope of the claims.

[0031] Various types of hollow switch ties are available in the industry. However, existing solutions have many issues that are addressed by the disclosed solution. Each of the problems with these existing offerings shall be discussed and addressed by the advantages of the disclosed solution.

[0032] One problem with existing solutions is the hollow switch tie is configured to be disposed at a straight section of track. Stated differently, existing solutions lack the capability to be placed in a curved section of track. This limitation is particularly problematic at or near switch machines, since the very nature of the switch is to direct rolling stock to a divergent path (having a curve).

[0033] Existing straight-track solutions are limited by the variety of rail fasteners compatible with the hollow switch tie. Rail fasteners are primarily responsible for creating cant, gauge, alignment, etc. These existing solutions are only compatible with rail fasteners that are substantially parallel to the direction of travel. As such, any significant adjustment to the rail geometry is limited.

[0034] In contrast, the disclosed solution is configured to be disposed at both straight and curved sections of track. To enable this functionality, the disclosed solution provides for operative connection of configurable rail fasteners. Configurable support enables the rail fasteners to be adjusted for curves. Additionally, the configurable support provides support for varying gauges, rail size (i.e., base width), cant, etc. In short, the disclosed solution offers at least, if not more, functionality compared to existing railway ties that currently support curved sections of track.

[0035] Some existing solutions are not configured to house switch machine componentscommonly the switch machine rods. These types of solutions are simply designed to allow objects to pass under the rail (via the hollow tie). For instance, these types of hollow ties allow for the passing of cabling, pipes, conduit, etc. from one side of the track to the other. For example, signaling cable within conduit could be passed under the rails via a hollow switch tie. To state plainly, these types of solutions are only slightly better than providing a steel pipe under a traditional railor simply burying these types of components below the tie.

[0036] In contrast, the disclosed solution is configured to accept many types of railway components beyond those simply passing under a rail. Nevertheless, the disclosed solution may be used to pass conduit, cabling, piping, etc. from one side of the rail to the other (e.g., from field side to field side). The disclosed solution enables far more functionality. For example, the disclosed solution is particularly configured to accept switch machine components such as switch rods. Further, the disclosed solution is configured to be tightly coupled to existing switch machines in order to enable this functionality. One of skill in the art will appreciate that a simple hollow tie (as exists today) cannot provide such advanced functionality as that supported by the disclosed solution.

[0037] Many existing solutions relating to hollow ties are simply extensions to a switch machine. As stated, switch machines rely on components that span below the rails in order to move a switch point (or another element of track). In many cases, these near-rail components are exposed and simply disposed near the ballast. However, some solutions provide for a switch machine that relies on a fully integrated hollow tie. Essentially, the hollow tie and the switch machine are one device.

[0038] By having the switch machine and hollow tie completely integrated, the operator loses the flexibility in replacing one component. For example, a replacement of the switch machine requires a replacement of the hollow tie (and vice versa). Failures aside, operators may simply desire to upgrade a switch machine without replacing the hollow tie. However, combined solutions lack this flexibility and thus lead to unnecessary replacement of additional components.

[0039] In contrast, the disclosed solution provides a stand-alone, yet completely interoperable solution, in one aspect. The hollow switch tie assembly may be installed as a standalone component with or without a switch machine. Stated differently, the hollow switch tie assembly may be simply used as a channel for cabling, conduit, piping, etc. Additionally, the hollow switch tie assembly may be used with a switch machine in order to enclose switch machine components (e.g., switch rods). Note, the hollow switch tie assembly is configured to be interoperable with many types and makes of switch machines. In short, the disclosed solution may be used in service to legacy installations or as part of a new installation-one having various types of switch machines operatively connected.

[0040] Another problem with existing solutions relates to the use of insulating layers. Hollow ties are generally made of metal (usually ferromagnetic). As such, electrical currents will conduct through the tie. In general, the tie should not conduct electrical current for a number of reasons. The primary reason is due to interference with electrical signals traveling along the rail. Each individual rail carries a low voltage signal that is used for communication. When the two rails share current, this signal is interrupted. This problem is unique to metal-based ties since many lumber ties and concrete ties are not conductive.

[0041] Therefore, metal ties are insulated such that each rail is electrically isolated. Insulating layers are provided at various points in the tie and rail fastener. In general, these layers perform the intended function properly. However, during maintenance, especially replacement, these layers become easily damaged. Often, the layers are made from non-metallic materials that are not robust. As such, any movement or change can lead to degradation of the insulation which, as stated, can lead to electrical interference for rail-based signaling systems.

[0042] In contrast, the disclosed solution provides electrical insulation between each rail such that these sensitive electrical signals are protected from interference. The hollow steel tie assembly comprises a plurality of shims which can be installed at one time without the need for ongoing removal when components are serviced. For example, when the rail fastener and/or interface plate is replaced/serviced, the insulating layer can be left in position and thus protected from inadvertent damage during other maintenance operations. The plurality of shims is fixed in position, in part, with a plurality of support plates that provides support for other components of the solution. In short, the hollow steel tie assembly provides electrical insulation with high durability thus reducing maintenance costs as well as avoiding failure of electrical insulation requirements.

[0043] Another problem that affects existing solutions is the inability to address changes in track-related customization. Deployments in rail are complex. Many components are required to address many configurations. Track-related customization often requires custom work to be performed on components. For example, a switch machine may be deployed at a turnout with a particular geometry and handedness. If either requirement changes (as is often the case), then the hollow tie is often removed, altered, and reinstalled. Since tracks are essentially long sequences of interoperable parts, several parts of trackwork must be sent back for changes. In short, necessary changes are often impossible in the field.

[0044] Customizations, in short, cause many delays in deployment. Further, the costs increase. Additionally, safety may be compromised since any change has the risk of introducing errors. For example, a rushed customization order may inadvertently result in out-of-tolerance components being deployed.

[0045] In contrast, the disclosed solution is readily customizable. To achieve customization, the disclosed solution uses a plurality of interface plates that are operatively connected to the rail. These interface plates may address many types of changes to track configuration. For example, a first plurality of interface plates may be configured for a straight segment of track having a first gauge. If the straight segment now requires a slight curve with a slightly different gauge, then the first plurality of interface plates may be removed. A second plurality of interface plates may be configured (or preconfigured) to the slight curve and slightly different gauge. Next, the second plurality of interface plates may then be installed in place of the first plurality of interface plates.

[0046] One can conceive of a myriad of interface plates that are uniquely configured to almost any type of deployment. The interface plates may address any handedness, curve, gauge, cant, rail size (e.g., base width), material type, durability, strength, hardness, etc. These various interface plates may simply be installed into an already-installed disclosed hollow steel tie without excessive changes to the installation. Given that the installation of a hollow steel tie is non-trivial, personnel need not be concerned with removing an entire hollow tie to make somewhat minor changes to the connection between the hollow tie and the rail itself. This streamlining of installation and maintenance not only reduces costs but enhances safety for not only personnel but for passengers.

[0047] Another problem with existing hollow ties is the shape of the shell that houses the components. Some configurations of hollow ties rely on top plates that interface with a shell. To support the top plates, many shells have support flanges that are disposed inward. This configuration may provide support but causes the access to the internal components to be very difficult. For instance, personnel servicing a switch rod may have difficult accessing the components since the supporting flanges directly block access. For minor operations such as lubrication, this issue is not as problematic. However, significant servicing may require invasive operations to access components, including disassembly of the switch machine and/or hollow tie.

[0048] In contrast, the disclosed solution provides for outward-facing support flanges. As stated, the shell generally supports top plates. In the disclosed solution, the flanges of the shell are configured such that personnel can readily access the components housed in the shell without the need for invasive removal/disassembly of components. This configuration is made possible by the unique shape of the shell that is structurally configured to provide necessary support for top plates, rail fasteners, rail, etc.without requiring the support flanges to cover the interior of the shell (and associated components).

[0049] Another problem with existing solutions relates to adding heating components to the interior of the hollow tie. Railways are subject to extreme operating conditions. Snow and ice are particularly problematic because switch machine components will freeze and become inoperative in cold conditions. To address this problem, some operators rely on heating components disposed at or near the switch machine and/or hollow tie. However, existing solutions provide suboptimal support for heating components. Many existing hollow ties rely on rectangular shell designs which do not provide additional space for heating components. Stated differently, existing solutions are designed only to support switch machine components-with heating components being an afterthought.

[0050] In contrast, the disclosed solution relies on a shell that is configured such that heating components can fit adjacent to switch machine components (e.g., switch rods). This functionality is provided by the unique shape of the shell which has a ventral bulge which enables heating components to be situated near the switch rods. As such, the disclosed solution is particularly useful in deployments where the existing hollow ties cannot support heating components. As stated above, the disclosed solution is configured to replace hollow ties without necessarily requiring replacement of the switch machine.

[0051] FIG. 1A is a planar view of a hollow switch tie assembly 100, as shown from a top perspective. A plurality of axes is shown as a first axis 103X, a second axis 103Y, and a third axis 103Z. The axis 103X is perpendicular to the direction of rolling stock traveling along the track. The axis 103Y is parallel to the direction of travel of rolling stock moving along the track. The axis 103Z is vertical, as formed by the normal vector of the axes 103X, 103Y.

[0052] The hollow switch tie assembly 100 need not only be used for switch machines. The hollow switch tie assembly 100 is generally operable to be used for the purpose of housing any type of equipment and/or components. For example, the hollow switch tie assembly 100 may be used to convey cabling from one side of a track to the other. Again, the benefit of the hollow switch tie assembly 100 is to provide a protective housing for railway equipment of any kind, whether moveable or static (such as electrical conduit, drain pipes, etc.).

[0053] While operable for other purposes, the hollow switch tie assembly 100 is generally configured to accommodate the components of a switch machine (or a railroad switch) that is disposed at or near a railway track. Switch machines typically rely on a number of switch machine components to move a switch point from a first position to a second positionexamples of which include cabling, rods, screws, cantilevers, and any other means of physically pushing and/or pulling a switch point. The term switch machine components will be used throughout this disclosure to refer to the aforementioned components; however, one of skill in the art will appreciate that switch machine components may be those beyond the components enumerated above (e.g., tie-heating components, housings, sensors, etc.). Often, these switch machine components are disposed between the railway ties (i.e., in the cribs). However, the hollow switch tie assembly 100 is configured to accept and protect these switch machine components on both the field side and gauge side of the track.

[0054] The hollow switch tie assembly 100 comprises a shell 101, a plurality of support plates 104Z, a plurality of interface plates 106Z, a plurality of support plates 107Z, and a cover plate 109. The shell 101 is generally configured to provide a cavity for the switch machine components. Further, the shell 101 provides for the support for the rail. Therefore, the shell 101 is intended to be installed on ballast, in one aspect.

[0055] The plurality of support plates 104Z comprises a first support plate 104A and a second support plate 104B. In one aspect, the support plates 104A, 104B are generally configured in an H-shape in order to provide structural integrity to the shell 101 as well as any rail interfacing plates disposed on the dorsal surface of the hollow switch tie assembly 100. Therefore, the plurality of support plates 104Z is substantially flat on the dorsal and ventral surfaces. In another aspect, the support plates 104A, 104B may not have the H-shape and instead be configured as separated strips on each side of the shell 101 (for a total of four or more strips in total). In general, the plurality of support plates 104Z is configured to provide a substantially flat surface above the shell 101, which may otherwise not have a full bearing surface.

[0056] The plurality of interface plates 106Z comprises a first interface plate 106A and a second interface plate 106B. The interface plates 106A, 106B are configured to be installed on the dorsal surfaces of the plurality of support plates 104Z. The plurality of interface plates 106Z is configured to accommodate the fixation of a rail to the hollow switch tie assembly 100. As with the support plates 104A, 104B, the interface plates 106A, 106B have an H-shape.

[0057] The H-shapes of the plurality of support plates 104Z and the plurality of interface plates 106Z provides multiple benefits. First, the H-shapes provide for access to the interior of the shell 101 such that switch machine components (e.g., switch rods) may be accessed. For example, the H-shape allows for the inspection and replacement of switch machine components without the need to physically remove any operatively connected rail. Second, the H-shapes enable movement of switch rod clips that are operatively connected to the switch point. For example, a switch rod may be disposed within the shell 101 that causes the switch point (and switch rod clip) to move (parallel to the axis 103X) between the H-shape. Stated simply, the H-shapes enable both movement of parts outside and within the shell 101. One of skill in the art will appreciate that cover plates may be installed above the H-shape to enclose the switch machine components, if so desired.

[0058] The plurality of interface plates 106Z comprises a plurality of rail fasteners 102Z. The plurality of rail fasteners 102Z comprises a first rail fastener 102AA, a second rail fastener 102AB, a third rail fastener 102BA, and a fourth rail fastener 102BB. The rail fasteners 102AA, 102AB are disposed on the dorsal surface of the interface plate 106A. Similarly, the rail fasteners 102BA, 102BB are disposed on the dorsal surface of the interface plate 106B.

[0059] The plurality of rail fasteners 102Z is generally configured to operatively connect a plurality of rails to the hollow switch tie assembly 100. The plurality of rails (not shown) is intended to be installed in a direction that is substantially parallel to the axis 103Y. One of skill in the art will appreciate that the plurality of rail fasteners 102Z may require additional hardware (not shown) in order to operatively connect a rail. Such additional hardware includes tension clamps, bolts, screws, nuts, clips, etc. Given that the interface plates 106A, 106B may be removable, different types of rail fasteners may be employed for any given interface plate. As such, the interface plate 106A may have different rail fasteners than the interface plate 106B.

[0060] One of skill in the art will appreciate that several factors determine the design of a turnout, including (but not limited to): rail type, rail gauge, switch machine orientation, position within a turnout, any hand, any switch geometry, a type of switch machine, etc.-all of which shall be termed switch design factors throughout this disclosure. Traditionally, railway ties are installed by excavation of ballast. The railway tie is moved through the newly created trench/void. Next, ballast is replaced to support the railway tie under the rail. Then, crews affix the rail to the railway tie. One of skill in the art will appreciate that reciprocal operations relate to the removal of the railway tie. When the railway tie is not customizable, any change to switch design factors may lead to an entire change of the railway tie.

[0061] A non-customizable railway tie may require substantial changes before being installed (or reinstalled). For example, if the switch design factors change, a non-customizable railway tie may need to be sent back to a factory for updates since such changes are difficult in the field. These changes incur cost as well as delay. If the non-customizable railway tie cannot be changed/updated, the railway tie may need to be destroyed. The problem is further magnified when one considers that several railway ties are involved in any given segment of track.

[0062] In sharp contrast, the disclosed solution addresses these problems by providing a substantially customizable railway tie, namely the hollow switch tie assembly 100. The plurality of interface plates 106Z provides for a customizable interface between the hollow switch tie assembly 100 and the rail. One advantage of the plurality of interface plates 106Z is to address the switch design factors without the need to completely reconfigure (redesign) or entirely replace the hollow switch tie assembly 100 to address any one of those switch design factors. In other words, the plurality of interface plates 106Z may be coupled and/or decoupled from the hollow switch tie assembly 100 in order to accommodate a rail type, a rail gauge, a switch machine orientation, a position within a turnout, a type of switch machine, any hand, etc.

[0063] Therefore, the hollow switch tie assembly 100 is configurable, via at least the plurality of interface plates 106Z, for any type of rail installation while still providing enclosure of switch machine components. When a switch machine factor changes, the operator may simply obtain new interface plates to address the changed switch machine factor. For instance, assume an operator orders a hollow switch tie assembly 100 having a first plurality of interface plates that is configured for a left-hand turnout. Assume further the operator discovers that an environmental factor (e.g., poor soil, water, etc.) causes the turnout design to be changed to a right-hand turnout. The operator may simply change the first plurality of interface plates (for left-hand turnout) to a second plurality of interface plates (for right-hand turnout) without the need to replace the hollow switch tie assembly 100. Rather, the hollow switch tie assembly 100 may stay substantially the same when the plurality of interface plates is changed out for right-hand turnout.

[0064] The plurality of support plates 107Z comprises a first support plate 107A and a second support plate 107B. The plurality of support plates 107Z is generally configured to accommodate a plurality of roller assemblies 117Z (not visible).

[0065] The cover plate 109 is disposed on the dorsal surfaces of the plurality of support plates 107Z. The cover plate 109 is generally configured to provide protection of the switch machine components and prevent foreign objects from entering the shell 101. Foreign objects include ballast, foliage, animals, moisture, ice, debris, mechanical parts, etc. When the hollow switch tie assembly 100 is used for switch machines, the plurality of roller assemblies 117Z is likewise protected, in part, by the cover plate 109. While the cover plate 109 is the only one shown, one of skill in the art will appreciate that cover plates may be installed at any position necessary to provide the benefits stated above. For example, a cover plate may be installed within the H-shapes of the plurality of support plates 104Z and/or the plurality of interface plates 106Z.

[0066] FIG. 1B is a planar view of the hollow switch tie assembly 100, as shown from a front perspective. The instant view better shows the plurality of rail fasteners 102Z. Further, a segment is disposed slightly below the dorsal surface of the plurality of interface plates 106Z in order to accommodate a rail. In one aspect, the segment may be level wherein the rail sits flush on the dorsal surface of the plurality of interface plates 106Z. The cover plate 109 is shown as being operatively connected to the shell 101 using a number of fastening components (e.g., bolts, cotter pins, etc.). One of skill in the art will note that the cover plate 109 may be removed since the associated hardware is removable.

[0067] As will be shown later in more detail, the plurality of support plates 104Z is operatively connected to the shell 101 via semi-permanent fasteners. Semi-permanent fasteners include Huck bolts, Huck nuts, hot rivets, lock bolt fasteners, etc. With respect to the interface plates 106A, 106B, removeable nut-bolt configurations are used in order to remove the interface plates 106A, 106B. By having removable interface plates 106A, 106B, the hollow switch tie assembly 100 may be used and even reused for any type of switch machine factors.

[0068] FIG. 1C is a perspective view of the hollow switch tie assembly 100, as shown from a top perspective. The instant view shows the semi-permanent fastening of the support plates 104A, 104B and the removable fastening of the interface plates 106A, 106B.

[0069] FIG. 2A is a planar view of the hollow switch tie assembly 100, as shown from a front, exploded perspective. The hollow switch tie assembly 100 further comprises a first plurality of shims 111Z and a second plurality of shims 112Z.

[0070] The first plurality of shims 111Z comprises a first shim 111AA, a second shim 111AB (not shown), a third shim 111BA, and a fourth shim 111BB (not shown). The shims 111AA, 111AB are operatively connected to the ventral surface of the support plate 104A. The shims 111BA, 111BB are operatively connected to the ventral surface of the support plate 104B. The plurality of shims 111Z may be metallic or non-metallic. Further, the plurality of shims 111Z may provide electrical insulation.

[0071] The second plurality of shims 112Z comprises a first shim 112AA, a second shim 112AB (not shown), a third shim 112BA, and a fourth shim 112BB (not shown). The shims 112AA, 112AB are operatively connected to the ventral sides of the shims 111AA, 111AB, respectively. The shims 112BA, 112BB are operatively connected to the ventral sides of the shims 111BA, 111BB, respectively. The plurality of shims 112Z is operatively connected to the dorsal surface of the shell 101. The plurality of shims 112Z may be metallic or non-metallic. Likewise, the plurality of shims 112Z may provide electrical insulation. In terms of functionality, the plurality of shims 112Z provides mechanical support for shims and/or plates abovesince the shell 101 may have a slight curvature at the dorsal surface of the shell 101. With said support, the shims and/or plates above may deform toward the curvature of the shell 101 when vertical force is applied (e.g., riveting, load from rolling stock, etc.). Still further, the shell 101 itself may deform.

[0072] Typically, rails require electrical insulation from the underlying railway tie, especially when the railway tie is metallic. For instance, a low voltage current may pass through each of the rails (respectively) in order to carry signals. Each rail, therefore, may be required to be electrically isolated from the other rail in order to preserve the integrity of the signal. In the hollow switch tie assembly 100, the shell 101 is metallic. As such, the pluralities of shims 111Z, 112Z may be configured to provide electrical insulation. As shown in the instant figure, the plurality of shims 111Z is non-metallic (i.e., electrically insulating), and the plurality of shims 112Z is metallic (i.e., not electrically insulating).

[0073] The instant view better shows the plurality of roller assemblies 117Z. The plurality of roller assemblies 117Z is generally configured to accommodate the movement of switch machine components (e.g., a rod associated with a switch machine). One of skill in the art will appreciate that other components may be disposed in place of the plurality of roller assemblies 117Z. Likewise, one of skill in the art may not even install the plurality of roller assemblies 117Zif (for example) the hollow switch tie assembly 100 is used as an undertrack conduit (e.g., for cabling, pipe, etc.).

[0074] FIG. 2B is a planar view of the hollow switch tie assembly 100, as shown from a side, exploded perspective. The pluralities of shims 111Z, 112Z are shown as being substantially flush with the shell 101, thus providing substantially little obstruction to the interior of the shell 101.

[0075] FIG. 2C is a perspective view of a hollow switch tie assembly 100, as shown from a top, exploded perspective. The pluralities of shims 111Z, 112Z are shown to have notches that enable removable fasteners to operatively connect the plurality of support plates 104Z and/or the plurality of interface plates 106Z without necessarily interfacing with the shell 101, the plurality of shims 111Z, and/or the plurality of shims 112Z.

[0076] FIG. 3A is a planar view of the hollow switch tie assembly 100, as shown from a front, exploded perspective. The hollow switch tie assembly 100 further comprises a first plurality of fastener assemblies 114Z and a second plurality of fastener assemblies 115Z.

[0077] The plurality of fastener assemblies 114Z comprises a first fastener assembly 114AAA, a second fastener assembly 114AAB, a third fastener assembly 114ABA, a fourth fastener assembly 114ABB, a fifth fastener assembly 114BAA, a sixth fastener assembly 114BAB, a seventh fastener assembly 114BBA, and an eighth fastener assembly 114BBB. The plurality of fastener assemblies 114Z is generally configured to operatively connect the interface plates 106A, 106B to the support plates 104A, 104B.

[0078] The plurality of fastener assemblies 115Z comprises a first fastener assembly 115AAA, a second fastener assembly 115AAB, a third fastener assembly 115ABA, a fourth fastener assembly 115ABB, a fifth fastener assembly 115BAA, a sixth fastener assembly 115BAB, a seventh fastener assembly 115BBA, and an eighth fastener assembly 115BBB.

[0079] The fastener assembly 115AAA comprises a Huck nut 124, a first washer 138A, a first insulating washer 139A, a fitted washer 116, an insulating sleeve 140, a second insulating washer 139B, a second washer 138B, and a Huck bolt 123. The Huck nut 124 is intended for semi-permanent installation of the support plates 104A, 104B to the shell 101. Having Huck nuts 124 ensures, in part, that personnel do not remove the support plates 104A, 104B from the shell 101. As is often the case, removeable fasteners tend to be removed. However, the hollow switch tie assembly 100 has the interface plates 106A, 106B that are intended for removal/installation in order to affix rail to the hollow switch tie assembly 100. That stated, the fastener assembly 115AAA may be removed using cutting (or torching) in order to remove the support plates 104A, 104B. However, this situation is less common.

[0080] FIG. 3B is a planar view of a hollow switch tie assembly 100, as shown from a front, exploded perspective. The fastener assembly 114AAA comprises a nut 126, a washer 141, and a bolt 125. The fastener assembly 114AAA is generally configured for removal, replacement, etc. such that the plurality of interface plates 106Z may be swapped to accommodate any conceivable configuration of rail.

[0081] FIG. 3C is a planar view of the hollow switch tie assembly 100, as shown from a side, exploded perspective. The fastener assembly 115AAA is shown in greater detail.

[0082] A plurality of cover plate fasteners 135Z comprises a first cover plate fastener 135AA, a second cover plate fastener 135AB, a third cover plate fastener 135BA, and a fourth cover plate fastener 135BB. The plurality of cover plate fasteners 135Z is generally configured to be removable (as shown with the cotter pin). As such, the cover plate 109 may be removed, replaced, etc. in order to access switch machine components (e.g., such as the plurality of roller assemblies 117Z).

[0083] FIG. 3D is a planar view of the hollow switch tie assembly 100, as shown from a side, exploded perspective. The fastener assembly 114AAA is shown in greater detail.

[0084] FIG. 3E is a perspective view of the hollow switch tie assembly 100, as shown from a top, exploded perspective. The fastener assembly 115AAA is shown in greater detail.

[0085] FIG. 3F is a perspective view of the hollow switch tie assembly 100, as shown from a top, exploded perspective. The fastener assembly 114AAA is shown in greater detail.

[0086] The pluralities of fastener assemblies 114Z, 115Z may contain fewer or more components than those shown in the instant figures. For example, any number of washers, locking washers, bushings, sleeves, nuts, locking nuts, etc. may be used in order to achieve the disclosed functionality. At a very high level, the plurality of fastener assemblies 114Z is intended for removability whereas the plurality of fastener assemblies 115Z is intended for semi-permanent fastening. However, functionalities may be adapted for a particular installation environment. For example, all fastening assemblies may be semi-permanent in order to prevent tampering. Likewise, all fastening assemblies may be removable in order to enable removal/maintenance operations. Naturally, a combination of semi-permanent and permanent components may be employed.

[0087] FIG. 4A is planar view of the hollow switch tie assembly 100, as shown from a front, exploded perspective. The hollow switch tie assembly 100 further comprises the plurality of roller assemblies 117Z. The plurality of roller assemblies 117Z comprises a first roller assembly 117AA, a second roller assembly 117AB, a third roller assembly 117BA, and a fourth roller assembly 117BB.

[0088] The roller assembly 117AA comprises a nut 118, a first washer 142, a second washer 143, and a roller 120. The washers 142, 143 may have surfaces that enable tightening operations but substantially resist loosening operations. The roller assembly 117AA is configured to be operatively connected via the support plate 107A to the shell 101. As previously stated, the roller assembly 117AA is configured to enable the movement (via the roller 120) of switch machine components.

[0089] FIG. 4B is a planar view of the hollow switch tie assembly 100, as shown from a side, exploded perspective. A washer 136 is shown that is shared between the roller assembly 117AA and the roller assembly 117AB.

[0090] FIG. 5 is a perspective view of the hollow switch tie assembly 100, as shown from a top, exploded perspective. The instant view is complex but shows the overall nature of the various fastening assemblies, shims, support plates, interface plates, etc. As stated, one of skill in the art may vary the nature and type of fasteners without departing from the design of the hollow switch tie assembly 100 as disclosed herein. One of skill in the art will appreciate that the interface plates 106A, 106B are disposed on the dorsal surface of the hollow switch tie assembly 100 and provide for easily customizable interfaces to various types of rail configurations/orientations.

[0091] FIG. 6A is a planar view of the hollow switch tie assembly 100, as shown from a top perspective. The instant view highlights one configuration of the interface plate 106B. As disclosed herein, the interface plates 106A, 106B may be configured for any type of rail and/or rail orientation. Therefore, the instant view is one of many potential examples of the interface plates 106A, 106B.

[0092] A first axis 122A and a second axis 122C are shown as being parallel to the axis 103Y. A third axis 122B and a fourth axis 122D are shown as being parallel to the axis 103X. The axes 122A, 122B, 122C, 122D define a rail base support 133B. The rail base support 133B is shown as being substantially parallel to the axis 103Y. However, there may be other configurations in which the rail base support 133B is angled and/or pitched to accommodate a different rail orientation. Likewise, the width and/or length of the rail base support 133B may be different in order to accommodate switch machine factors. Note, the interface plate 106A may comprise a similar rail base support 133A. Further, the rail base supports 133A, 133B may different in pitch, angle, configuration in order to accommodate a particular configuration of the paired interface plates 106A, 106B.

[0093] One particular feature of the rail base support 133B is that the interface plates 106A, 106B may have different rail base support configurations. For example, the interface plate 106A may have a first rail base support that is oriented in parallel with the axis 103Y whereas the interface plate 106B may have a second rail base support that is slightly angled away from the axis 103Y. Therefore, widening or narrowing spacings of rail may be accommodated by the same hollow switch tie assembly. As such, one of skill in the art will appreciate that an installer may simply have an assortment of interface plates available and be able to accommodate changes in rail orientation without the need to fully replace or change the hollow switch tie assembly 100.

[0094] FIG. 6B is a planar view of the hollow switch tie assembly 100, as shown from a top perspective. A first axis 122A and a second axis 122C are shown as being parallel to the axis 103Y. A third axis 122B and fourth axis 122D are shown being parallel to the axis 103X. The axes 122A, 122B, 122C, 122D define an area 127.

[0095] A first axis 124A and a second axis 124C are shown as being parallel to the axis 103Y. A third axis 124B and a fourth axis 124D are shown as being parallel to the axis 103X. The axes 124A, 124B, 124C, 124D define an area 128.

[0096] The areas 127, 128 may have slightly different sizes and/or shapes but the general intent is that the areas 127, 128 are configured to enable both support for the rail as well as access to components within the shell 101. Cover plates (not shown) may be installed to substantially cover the areas 127, 128.

[0097] FIG. 7A is a planar view of the shell 101, as shown from a side perspective. A first axis 131A and a second axis 131B are shown as being parallel to the axis 103Z. The axes 131A, 131B intersect an axis 129 that is parallel to the axis 103Y. Lastly, a first axis 130A and a second axis 130B intersect the axes 131A, 131B, 129.

[0098] The axes 129, 130A, 131A define various surfaces and areas of the shell 101. The axes 130A, 130B define reciprocal surfaces of the shell 101 (as projected away from the viewer in parallel to the axis 103X). The axes 129, 130A, 131A, define an area 134A. The axes 129, 130B, 131B define an area 134B.

[0099] The areas 134A, 134B have a curvature that enables for more elastic support for rail. Without the areas 134A, 134B, the shell 101 may be too rigid to support the forces of rolling stock that is traveling on the rails. Therefore, the areas 134A, 134B provide for not only strength but for durability in the field.

[0100] FIG. 7B is a planar view of the shell 101, as shown from a side perspective. The areas 134A, 134B may accommodate a plurality of areas 132Z which comprises a first area 132A and a second area 132B. In cold environments, switch machine components tend to freeze and become seized. As such, heaters may be disposed within the shell 101 at or near the areas 132A, 132B. Due to the outwardly extending nature of the shell 101, these heating components will substantially avoid interference with switch machine components that require movement.

[0101] The disclosed solution may be provided as a kit. An operator/installer may have different requirements than others. As such, a kit may be provided wherein a set of components are provided to the operator/installation. For example, a kit may comprise several pluralities of interface plates along with a plurality of hollow steel tie assemblies. As such, the operator/installer may select a subset of components for installation. Remaining components within the kit may then be returned to stock-potentially for use in other kits. In this type of situation, the installation (and maintenance) of the track is accelerated and derisked since components need not be refit for changes in track configuration.

[0102] Therefore, a kit may comprise one or more hollow steel tie assemblies 100. A kit may comprise the plurality of interface plates 106Z. A kit may comprise the shell 101. A kit may comprise the plurality of support plates 104Z. A kit may comprise miscellaneous installation hardware (e.g., the washer 138B and the insulating washer 139B). A kit may comprise the roller assembly 117AA. A kit may comprise the cover plate 109. A kit may comprise the fastening assembly 114AAA. A kit may comprise the plurality of shims 111Z. A kit may comprise a switch machine for use with the hollow steel tie assembly 100.

[0103] A kit may comprise a combination of the kits enumerated above. Likewise, a kit may comprise any of the components, parts, assemblies, hardware, etc. in this disclosotethe ones enumerated above are simply examples. Further, a kit may comprise other kits. For example, a kit may comprise the hollow steel tie assembly 100 and an extra plurality of shims 111Z in the event a shim 111AA becomes damaged during installation. The most common configuration of kits will likely be, though not certainly, several of the pluralities of interface plates 106Z and the hollow steel tie assembly 100again, this configuration of kit enables the rapid installation of trackwork in many configurations.

[0104] The foregoing method descriptions and diagrams/figures are provided merely as illustrative examples and are not intended to require or imply that the operations of various aspects must be performed in the order presented. As will be appreciated by one of skill in the art, the order of operations in the aspects described herein may be performed in any order. Words such as thereafter, then, next, etc. are not intended to limit the order of the operations; such words are used to guide the reader through the description of the methods and systems described herein. Further, any reference to claim elements in the singular, for example, using the articles a, an, or the is not to be construed as limiting the element to the singular.

[0105] The preceding description of the disclosed aspects is provided to enable any person skilled in the art to make, implement, or use the claims. Various modifications to these aspects will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other aspects without departing from the scope of the claims. Thus, the present disclosure is not intended to be limited to the aspects illustrated herein but is to be accorded the widest scope consistent with the claims disclosed herein.