Fastening railway rails

Abstract: A railway rail anchoring device (300), for use with a railway rail-fastening clip (1') which is approximately M-shaped in plan and has first and second leg portions and a rail-bearing portion, comprises first and second clip-retaining members (304), connected together by a base member (301), each of which define a passageway (309) for receiving one of the leg portions of such a clip (17). A boundary surface (314) of at least one of the passageways (309) includes first locating means (305) for engagement with a first region of the leg portion of the clip (1') located in that passageway such that the clip (1') can be held in a non-rail-bearing pre-assembly position in which the clip (1') is retained by the device (300) such that the clip (1') cannot move out of the said pre-assembly position towards a rail unless driven in a first direction. The first locating means (305) are provided at a location intermediate respective ends of the passageway (309), so as to allow the device to be manufactured without an expendable core.

Description: The present invention relates to fastening railway rails. The applicant's previous inventions, rail clips commonly referred to respectively as a "P-R" clip (disclosed in GB-861,473) and an "e"-clip (disclosed in GB-1,510,224), have both been successful for many years, providing low-cost rail fastenings that have been widely used in many countries around the world. These clips may be installed into shoulders alongside the rail either manually, using a sledgehammer to drive the clip into the shoulder, or automatically by a clip driving machine. Whilst automatic clip installation is obviously more desirable, being quicker and less labour-intensive, it can be a fairly complex process, requiring accurate positioning of the clip relative to the shoulder in order to achieve an adequate rail fastening. With a view to facilitating the installation of railway track the present applicants have previously proposed, in EP-A-0619851 and AU-A-665971, a shoulder for use with a railway rail-fastening clip which is approximately M-shaped in plan and has first and second leg portions and a rail-bearing portion. The shoulder comprises a base member and first and second clip-retaining members, connected together by the base member such that the first clip-retaining member is spaced apart from the second clip-retaining member so as to define between the first and second clip-retaining members an opening for receiving the rail-bearing portion of such a clip. Each of the first and second clip-retaining members defines a passageway for receiving one of the leg portions of such a clip, a boundary surface of at least one of the passageways including first locating means for engagement, when the device is in use with such a clip, with a first region of the leg portion of the clip located in the passageway such that the clip can be held in a pre-assembly position in which the clip is retained by the device but the rail-bearing portion of the clip does not bear on a rail. Second locating means are also provided on a boundary surface of at least one of the passageways for engagement with a second region of the leg portion of the clip located in the passageway such that the clip can be held in a working position in which the rail-bearing portion of the clip bears on the rail, the first and second locating means being such that the clip cannot move out of the pre-assembly position towards a rail unless driven in a first direction and the clip cannot move out of the working position away from the rail unless driven in a second direction, opposite to the first direction. However, the design of such a shoulder requires the use of an expendable core during the casting of each shoulder, which increases the cost of manufacture significantly. According to a first aspect of the present invention there is provided a railway rail anchoring device, for use with a railway rail-fastening clip which is approximately M-shaped in plan and has first and second leg portions and a rail-bearing portion, the device comprising a base member and first and second clip-retaining members connected together by the said base member such that the first clip-retaining member is spaced apart from the second clip-retaining member so as to define between the said first and second clip-retaining members an opening for receiving the said rail-bearing portion of such a clip; each of the said first and second clip-retaining members defining a passageway for receiving one of the leg portions of such a clip; and a boundary surface of at least one of the said passageways including first locating means for engagement, when the device is in use with such a clip, with a first region of the leg portion of the clip located in the said passageway such that the clip can be held in a pre-assembly position in which the clip is retained by the device but the rail-bearing portion of the clip does not bear on a rail, second locating means also being provided on a boundary surface of at least one of the said passageways for engagement with a second region of the leg portion of the clip located in the said passageway such that the clip can be held in a working position in which the rail-bearing portion of the clip bears on the rail, the first and second locating means being such that the clip cannot move out of the said pre-assembly position towards a rail unless driven in a first direction and the clip cannot move out of the said working position away from the said rail unless driven in a second direction, opposite to the said first direction; characterised in that the said first locating means are provided at a location intermediate respective ends of the said passageway. The installation of railway track can therefore be facilitated by using anchoring devices embodying the present invention, since prior to laying of the sleepers clips can be installed into the anchoring devices in such a way as to be held in those devices in a pre-assembly position which allows unobstructed threading of rails between the anchoring devices. The clips can then be driven into their working positions on the rail, either automatically or manually (both processes being facilitated by pre-insertion of the clips). Moreover, an anchoring device embodying the present invention can be made using a simple and inexpensive casting technique, thereby reducing manufacturing costs. In an embodiment of the present invention, third locating means are provided in the said opening defined between the said first and second clip-retaining members for engagement with a locating region of a toe insulator of such a clip so that the clip can be held in a maintenance position in which the clip does not bear on the rail and the said first region of the leg portion of the clip does not engage with the said first locating means of the device. According to a second aspect of the present invention there is provided a rail fastening assembly comprising a railway rail fastening clip suitable for holding down a railway rail, and an anchoring device, the clip being formed of a rod of material bent such that the clip is approximately M-shaped in plan, having first and second leg portions formed to cooperate with part of the anchoring device so as to locate the clip in the anchoring device, and also having a rail-bearing portion formed between the first and second leg portions, the anchoring device comprising a base member and first and second clip-retaining members connected together by the said base member such that the first clip-retaining member is spaced apart from the second clip-retaining member so as to define between the said first and second clip-retaining members an opening for receiving the said rail-bearing portion of such a clip; each of the said first and second clip-retaining members defining a passageway for receiving one of the leg portions of such a clip, and a boundary surface of at least one of the said passageways including first locating means for engagement with a first region of the leg portion of the clip located in the said passageway such that the clip can be held in a pre-assembly position in which the clip is retained by the device but the rail-bearing portion of the clip does not bear on a rail, second locating means also being provided on a boundary surface of at least one of the said passageways for engagement with a second region of the leg portion of the clip located in the said passageway such that the clip can be held in a working position in which the rail-bearing portion of the clip bears on the rail, the first and second locating means being such that the clip cannot move out of the said pre-assembly position towards a rail unless driven in a first direction and the clip cannot move out of the said working position away from the said rail unless driven in a second direction, opposite to said first direction; characterised in that the said first locating means are provided at a location intermediate respective ends of the said passageway. Reference will now be made, by way of example, to the accompanying drawings, in which:- Fig. 1 shows a previously-proposed railway rail-fastening assembly; Figs. 2a and 2b show respective plan and side elevational views of a rail fastening clip shown in Fig. 1; Figs. 3a, 3b and 3c show respective plan, side elevational and front elevational views of an anchoring device shown in Fig. 1; Figs. 4a, 4b and 4c show views for use in explaining respective steps of a method of fastening a railway rail; Figs. 5a, 5b and 5c show respective end, rear and plan views of a railway rail anchoring device or shoulder embodying the present invention; Figs. 6a, 6b and 6c show respective sectioned partial end views of a railway rail fastening assembly including an anchoring device embodying the present invention; and Figs. 7a, 7b and 7c show partial end views corresponding to the views shown in Figs. 6a, 6b and 6c respectively. Fig. 1 shows a rail-fastening assembly known from Australian Patent No. 665971 and European Patent No. 0619851, which assembly comprises a resilient railway rail-fastening clip 1' having a toe portion 14' which bears against a flange of a railway rail 3 supported by a rail foundation 6, the rail foundation 6 being cushioned from the rail 3 by means of a resilient rail pad 7 located between the base of the rail and the rail foundation 6. The rail clip 1' is held in place by an anchoring device or shoulder 250, the shoulder 250 having a pair of passageways 253 (only one of which is shown in Fig. 1) in which respective limbs 11', 17' (only limb 17' being shown in Fig. 1) of the clip are located. The toe portion 14' of the clip 1' carries an insulator 4' covering the lowermost surface of the toe portion 14', so that the toe portion 14' of the clip 1' bears on the rail flange through the insulator 4', which thereby insulates the clip 1' from the rail 3. Located between the rail 3 and the shoulder 250 is a "side post" insulator 570, for electrically isolating the shoulder 250 from the rail 3. The components in the assembly will now be described in more detail. As shown in Figs. 2a and 2b, the clip 1' shown in Fig. 1 is substantially M-shaped in plan. It is made by bending a rod of resilient material, which is, in this case, circular in cross-section (for example a steel rod 15mm in diameter), so as to have, proceeding from one end A of the rod to the other end B, a straight first portion 11', a second portion 12' bent through 180°, a curved third portion 13', a fourth portion 14' which is bent through 180°, a curved fifth portion 15', a sixth portion 16' which is bent through 180° and a straight seventh portion 17'. The first and seventh portions 11' and 17' of the clip constitute the outer legs of the M, the third and fifth portions 13' and 15' constitute the inner legs of the M, the second and sixth portions 12' and 16' join respective inner legs to the outer legs, and the fourth portion 14' of the clip joins together the inner legs. When viewed in plan, as in Fig. 2a, the fourth portion 14' of the clip extends beyond the free ends A and B of the first and seventh portions 11' and 17'. When a clip is bearing on the rail, as shown in Fig. 1, a plane containing the longitudinal axis of the fourth portion 14' is substantially parallel to the plane containing the first and seventh portions 11' and 17'. The outer legs of the clip, i.e. the first and seventh portions 11' and 17' thereof, are each provided with detents 18 on their upper surface adjacent to the respective free ends A and B of the clip. Each free end A,B of the clip 1' is tapered on its upper and lower surfaces, the upper and lower tapered surfaces 19a, 19b being at an angle of approximately 30° with respect to the longitudinal axis of the clip. The detent 18 is formed just behind the tapered part 19a of the upper surface. As will be clear from the description of Figs. 4a to 4c later on, the taper 19a on the upper surface of the outer leg is intended to ease insertion of the clip 1' into an anchoring device 250. The taper 19b on the lower surface of the outer leg is intended to facilitate use of the clip in holding the insulator 570 in place between the anchoring device 250 and the rail 3. The clip shown in Figs. 2a and 2b has heretofore been used, as shown in Fig. 1, with an anchoring device as shown in more detail in Figs. 3a to 3c. The anchoring device 250 of Figs. 3a to 3c comprises a base member 251, which extends substantially horizontally when the device is in use, and a pair of clip-retaining members 252 which are connected at one end thereof to either end of the base member 251 so as to extend substantially perpendicularly thereto both vertically and horizontally. A channel formed in the outwardly-facing wall of each clip-retaining member 252 provides a passageway 253 for receiving the outer legs of the clip of Figs. 2a and 2b. The clip-retaining members 252 are spaced apart by the base member 251 so as to define an opening 254 therebetween for receiving the inner legs of the clip. Overhanging the opening 254 from the top of each clip-retaining member 252 are inwardly-extending projections 255, which projections 255 serve to limit upward movement of the inner legs of the clip which may occur due to rail tilt when the clip is in use. Each passageway 253 has an opening 256 at the end of the clip retaining member 252 which is furthest from the base member 251, but is closed by a wall 257 at the other end of the clip-retaining member 252 so as to provide means by which the insulator 570 may be located on the anchoring device 250. For this purpose also, the roof of the passageway adjacent to the wall 257 is removed. When the anchoring device 250 is in use, the floor of the passageway 253 is substantially horizontal. The passageway 253 has only one side face, constituted by a wall 252a of the clip-retaining member 252 formed so as to lie between the outer and inner legs of the clip 1' when in use, the other side of the passageway being open. The roof of the passageway 253 is formed so as to have a sloping part 253a which is inclined with respect to the horizontal when the device is in use such that the passageway is taller at the part of that sloping part 253a which is closer to the opening 256 than it is at the other end of the part 253a, the roof of the passageway 253 being formed at either end of the sloping part 253a in such a way as to provide projections 253b and 253c for cooperating with the detent 18 formed in the outer leg of each clip 1' for locating the clip 1' at a particular location with respect to the anchoring device 250. Extending from each wall 252a of the clip-retaining members 252 in a region above the passageways 253 is a part 258 such that between the passageway 253 and the part 258 there is defined a recess 259 into which a tool, for installing a clip into or removing a clip from the device, or for lifting a sleeper to which a pair of anchoring devices 250 have been secured, may be inserted. The roof of the recess 259 may be sloped along one edge as shown. The wall 252a of each clip-retaining member 252 may be rounded or sloped along one edge as shown so as to reduce the amount of material required to make the anchoring device 250. The floor of the passageway 253 is preferably extended beyond the opening 256 so as to provide a part 253d against which the lower surface of the outer legs of the clip may rest when the clip is about to be installed in the device 250. Installation of the clip 1' into an anchoring device 250 as shown in Fig. 1 will now be explained with reference to Figs. 4a to 4c (the toe insulator 4' that would normally be carried by the clip 1' being omitted for clarity in these Figures). Fig. 4a shows the clip in an initial position, as it is when it is about to be driven into the device 250, with the fourth portion of the clip 1' resting (via a toe insulator 4', not shown) on the base member 251 of the anchoring device 250 and the outer legs of the clip 1' just inside the passageways 253 of the anchoring device 250 such that part of the lower surface of the outer legs rests on the portion 253d of the anchoring device 250, the face 18a of the detent 18 which is closest to the free end of the outer leg is in contact with a face 253b" of the projection 253b, and the upper tapered surface 19a of the outer leg is partly in contact with the sloping part 253a of the roof of the passageway 253. When the clip is driven into an intermediate position, as shown in Fig. 4b, in which the face of the detent 18b is brought into contact with another face 253b' of the projection 253b, the outer legs are deflected downwardly a little more, bringing the second and sixth portions 12' and 16' of the clip 1' upwardly. In this position, the fourth portion 14' of the clip rests above part of the side post insulator 570, thereby preventing upward movement of that insulator. If the insulator is shaped such that it holds down the rail pad 7, then in this position the clip also serves to retain the rail pad through the insulator. Fig. 4c shows the clip as it appears when it has been driven from the intermediate position shown in Fig. 4b into a final position where the fourth portion 14' (normally carrying a toe insulator 4') of the clip 1' bears on the rail 3. As the clip is driven horizontally, the sloping roof of the passageway in contact with the upper tapered surface 19a of the outer leg urges the outer leg downwardly, thereby deflecting the clip. In the final position of the clip, the detent 18 in the clip 1' is engaged by the second projection 253c of the anchoring device 250 and the free ends of the outer legs overlie the locating feet 576 of the side post insulator 570 so that upward movement of the insulator 570 is further restricted. The clip is fully deflected in this position, the fourth portion of the clip lying in a plane which is substantially parallel to the plane containing the first and seventh portions of the clip and the second and sixth portions 12' and 16' of the clip being at their highest point. When the clip is in its initial position, the insulator is free to move upwardly, to facilitate replacement of the insulator 570 if required. If concrete sleeper manufacturers are supplied with respective clips, each clad in a toe insulator, and post insulators 570, to fit to the anchoring devices 250 after they have been cast in concrete sleepers, the sleepers can then be supplied to site complete with clips 1' and insulators 4', 570. When the rail 3 has been satisfactorily threaded between the anchoring devices 250, it is then a simple matter for the clips 1' to be driven further, particularly by machine, into engagement with the rail. However, the design of the anchoring device 250 described with reference to Figs. 3a to 3c is such that an expendable core is required during the manufacture of each device, thereby increasing manufacturing costs appreciably. In contrast, an anchoring device embodying the present invention can be manufactured using a simple and inexpensive casting technique. In this respect, in an anchoring device embodying the present invention the non-vertical surfaces are inclined with respect to a horizontal plane and there are no obstructive projections, so that a simple two-part mould can be used to produce the device. Such a design offers significant improvements over the earlier devices. In order to allow a simple mould to be used, without disrupting the performance of the device, locating means for locating the railway rail clip in a "parked" position before the assembly is fitted on the railway track installation are constituted by an abutment surface provided in the roof of the passageway intermediate the ends thereof. In addition, to allow the clip to be placed in an "insulator change" position, in which the side post insulator may be removed, without the need for the complete removal of the clip from the anchoring device (thereby facilitating maintenance of the track installation), an upstand member is provided. These features will now be described in more detail with reference to Figures 5a, 5b and 5c, which show respective end, rear and plan views of an anchoring device embodying the present invention, for use with the clip shown in Figures 2a and 2b. The anchoring device 300 of Figures 5a to 5c comprises a base member 301, which extends substantially horizontally when the device is in use, and a pair of clip-retaining members 304. Each clip-retaining member 304 is connected at one end thereof to the base member 301 and extends substantially perpendicularly thereto both vertically and horizontally when the device is in use. The clip-retaining members 304 are spaced apart on the base member 301 so as to define an opening 310 therebetween for receiving the inner legs of the clip shown in Figs. 2a and 2b. A channel formed in the outer face of each clip-retaining member 304 provides a passageway 309 for receiving respective outer legs of the clip of Figures 2a and 2b. Each passageway 309 has an opening 311 at one end thereof and is partially closed by a wall 312 at the other end of the clip retaining member 304 so as to provide means by which an insulator 570' may be located on the anchoring device 300, as will be explained later in more detail. For this purpose also, the roof of the passageway adjacent to the wall 312 is removed. When the anchoring device 300 is in use, the floor of the passageway 309 is substantially horizontal. The passageway 309 has only one side boundary surface, constituted by a wall 313 of the clip-retaining member 304 formed so as to lie between the outer and inner legs of the clip 1' when in use. The other side of the passageway is open. The roof of the passageway 309 is formed, at a location intermediate respective ends of the passageway, so as to have a sloping part 314 which is inclined with respect to the horizontal when the device is in use such that the passageway is taller at the part of that sloping part 314 which is closer to the opening 311 than it is at the other end of the part 314. The roof of each passageway 309 is formed, at a location intermediate respective ends of the passageway, so as to define an abutment surface 305 which engages with a first region constituted by a free end 19, of the inserted outer leg portion of the clip 1', when the clip is held in a pre-assembly position in the device 300, as will be explained below in more detail. The passageway roof 314 ends, closest to the wall 312, at a corner region 306 providing locating means which engage with a second region 18 of the clip 1', when the clip is in a working position, as will be explained in more detail below. Extending from each wall 313 of the clip retaining members 304 in a region above the passageways 309 is a part 315 such that between the passageway 309 and the part 315 there is defined a recess 316 into which a tool, for installing a clip into or removing the clip from the device, or for lifting a sleeper to which a pair of anchoring devices 300 has been secured, may be inserted. The roof of the region 316 may be sloped along one edge as shown. The wall 313 of each clip retaining member 304 may be rounded or sloped along one edge as shown so as to reduce the amount of material required to make the anchoring device 300. The floor of passageway 309 is preferably extended beyond the opening 311 so as to provide a part 301a against which the lower surface of the outer leg of the clip may rest when the clip is about to be installed in the device 300. The base member 301, which provides a support for the fourth portion 14' of the clip 1' when it is not bearing on the rail, is in this embodiment intended (when in use) to receive a side post insulator 570', a step 318 being provided in the face of the base member 301 which is closest to the rail 3 when the device 300 is in use for receiving a horizontally-extended part of the insulator 570'. It should be noted however that this step 318 would not be required if the anchoring device 300 were to be used with a conventional insulator for electrically isolating the device from the rail. In one embodiment of the anchoring device shown in Figures 5a to 5c, for use with a clip as described with reference to Figures 2a and 2b, the overall height of the anchoring device is 60 mm and its overall width is 101 mm. The clip-retaining members 304 define an opening between them which is 57 mm wide, the wall 313 being 9 mm wide. The part 301a extends beyond the opening 311 of the passage 309 by a distance 11 mm, the length of the passageway from the inner wall 312 to the opening 311 being 77 mm. The wall 312 is 8 mm thick as measured in a direction parallel to the length of the passageway 309, and is 21 mm high. The thickness of the floor of the passageway is 10 mm and the height of the passageway at the opening is 23 mm. The height of the passageway then decreases at an angle of about 5° to the abutment surface 305, which projects 1 to 2 mm from the passageway roof. The height of the passageway roof then decreases further at an angle of about 5° to a final height, at its lowermost point, of 18.5 mm above the floor of the passageway 209. At this lowermost point, the corner region 306 is defined. The step 318 formed in the base member 301 is formed so as to be 15 mm above the lowermost point of the anchoring device and is of depth 8 mm. The anchoring device 300 is provided with a intermediate portion 307 which links the two clip-retaining members 304 across the space 310. The portion 307 includes a projection 308 which projects upwardly from the portion 307. The projection 308 is for engagement with a part of the toe insulator 400 (as shown in Fig. 6c), which will be explained later. As can be seen from Figures 5a to 5c, the anchoring device 300 is provided with a pair of anchoring legs 302 which are for securing the device to a sleeper when in use. It is possible to have one or two such legs 302. Figures 6a and 7a show an anchoring device with a clip in a preassembly position. The resilience of the clip holds it in place in the anchoring device, and insulators 400 and 570' are held in place by the clip 1'. The clip is held in the preassembly position before being driven into a working position in the device 300. The first region 19 (which, as shown in Fig. 7a for example, is preferably slightly rounded) of the clip leg 11 (17) is held in abutting engagement with the abutment surface 305. In particular, the fourth portion of the clip 11 rests (via a part 401 of a toe insulator 400) on the portion 307 of the base member 301, and the outer legs of clip 1' lie inside respective passageways 309 of the anchoring device 300 such that respective end regions 19a' of those outer legs are in abutting engagement with respective notches 305. In this position the clip is only partially deflected, for example only 6 mm out of a possible total deflection of 12 mm. In the pre-assembly position, the clip does not bear on the rail 3. When the clip is driven into a working position, as shown in Figures 6b and 7b, a face of a detent 18a of the clip is brought into engagement with the corner region 306 of the clip retaining member 304, the toe insulator 400 is brought into contact with the foot of the rail 3, and the clip deflected such that a holding force is applied to the rail 3 by the clip 1', via the toe insulator 400. In this working position, the clip is held by means of the corner region 306 abutting against the detent 18a of the leg portion of the clip. In order to allow the side post insulator 570' to be changed, for example because of wear, the clip has a third position in the anchoring device 300, shown in Figures 6c and 7c, into which the clip may be driven outwardly from the rail, so that a detent 401 in the underside of the toe insulator 400 is brought into engagement with the projecting member 308 of the intermediate portion 307. The engagement of the toe insulator 400 with the projection 308 holds the clip in place, whilst allowing the side post insulator 570' to be removed from the assembly. Thus, this embodiment of the present invention allows the clip to be positioned in an "insulator-change" position, in which the side post insulator can be removed without the need for removal of the clip from the assembly or the removal of the assembly from the railway installation.

Claims: A railway rail anchoring device (300), for use with a railway rail-fastening clip (1') which is approximately M-shaped in plan and has first and second leg portions and a rail-bearing portion, the device (300) comprising: a base member (301); and first and second clip-retaining members (304) connected together by the said base member (301) such that the first clip-retaining member (304) is spaced apart from the second clip-retaining member (304) so as to define between the said first and second clip-retaining members (304) an opening (310) for receiving the said rail-bearing portion of such a clip (1'); each of the said first and second clip-retaining members (304) defining a passageway (309) for receiving one of the leg portions of such a clip (1'); and a boundary surface (314) of at least one of the said passageways (309) including first locating means (305) for engagement, when the device (300) is in use with such a clip (1'), with a first region of the leg portion of the clip (1') located in the said passageway such that the clip (1') can be held in a pre-assembly position in which the clip (1') is retained by the device (300) but the rail-bearing portion of the clip (1') does not bear on a rail, second locating means (306) also being provided on a boundary surface (314) of at least one of the said passageways (309) for engagement with a second region of the leg portion of the clip (1') located in the said passageway (309) such that the clip (1') can be held in a working position in which the rail-bearing portion of the clip (1') bears on the rail, the first and second locating means (305, 306) being such that the clip (1') cannot move out of the said pre-assembly position towards a rail unless driven in a first direction and the clip (1') cannot move out of the said working position away from the said rail unless driven in a second direction, opposite to the said first direction; characterised in that the said first locating means (305) are provided at a location intermediate respective ends of the said passageway (309). A device as claimed in claim 1, including, in the said opening (310) defined between the said first and second clip-retaining members (304), third locating means (308) for engagement with a locating region (401) of a toe insulator (400) of such a clip (1') so that the clip (1') can be held in a maintenance position in which the clip (1') does not bear on the rail and the said first region of the leg portion of the clip (1') does not engage with the said first locating means (305) of the device. A device as claimed in claim 1 or 2, wherein the said passageways (309) are defined in respective faces (313) of the said clip-retaining members (304) opposite to faces of the clip-retaining members adjacent to the said opening (310). A device as claimed in claim 3, wherein the said passageways (309) are in the form of a channel. A device as claimed in any one of the preceding claims, wherein longitudinal axes of the passageways (309) are substantially parallel to a main surface of a rail foundation when the anchoring device (300) is in use. A device as claimed in any one of the preceding claims, wherein the first and second passageways (309) include an upper boundary surface (314) which slopes downwardly in a direction away from the opening (311) of the passageways (309) into which a leg portion of the clip (1') is inserted when the device (300) is in use, the upper boundary surfaces (314) abutting respective leg portions of the clip (1') when the clip (1') is being driven into the device (300) so as to drive the leg portions downwardly with respect to the rail-bearing portion of the clip (1'). A device as claimed in any one of the preceding claims, wherein the said first locating means (305) are provided on the said upper boundary surface (314) by an abutment surface (305) projecting from that upper boundary surface (314). A device as claimed in any one of the preceding claims, wherein the said second locating means (306) are provided by a corner portion (306) of the said upper boundary surface (314). A rail fastening assembly comprising a railway rail fastening clip (1') suitable for holding down a railway rail, and an anchoring device (300), the clip (1') being formed of a rod of material bent such that the clip is approximately M-shaped in plan, having first and second leg portions formed to cooperate with part of the anchoring device (300) so as to locate the clip (1') in the anchoring device (300), and also having a rail-bearing portion formed between the first and second leg portions, the anchoring device (300) comprising: a base member (301); and first and second clip-retaining members (304) connected together by the said base member (301) such that the first clip-retaining member (304) is spaced apart from the second clip-retaining member (304) so as to define between the said first and second clip-retaining members (304) an opening (310) for receiving the said rail-bearing portion of such a clip (1'); each of the said first and second clip-retaining members (304) defining a passageway (309) for receiving one of the leg portions of such a clip (1'), and a boundary surface (314) of at least one of the said passageways (309) including first locating means (305) for engagement with a first region of the leg portion of the clip (1') located in the said passageway (309) such that the clip (1') can be held in a pre-assembly position in which the clip (1') is retained by the device (300) but the rail-bearing portion of the clip (1') does not bear on a rail, second locating means (306) also being provided on a boundary surface (314) of at least one of the said passageways (309) for engagement with a second region of the leg portion of the clip (1') located in the said passageway (309) such that the clip (1') can be held in a working position in which the rail-bearing portion of the clip (1') bears on the rail, the first and second locating means (305, 306) being such that the clip (1') cannot move out of the said pre-assembly position towards a rail unless driven in a first direction and the clip (1') cannot move out of the said working position away from the said rail unless driven in a second direction, opposite to said first direction; characterised in that the said first locating means (305) are provided at a location intermediate respective ends of the said passageway (309).

Inventors: BROWN TREVOR PAUL, CONROY BRIAN GEORGE, COX STEPHEN JOHN, GARDNER CHRISTOPHER, LARKE ROGER DAVID, MARSHALL BARRY, SVENDSEN JAN, BROWN, TREVOR PAUL, CONROY, BRIAN GEORGE, COX, STEPHEN JOHN, GARDNER, CHRISTOPHER, LARKE, ROGER DAVID, MARSHALL, BARRY, SVENDSEN, JAN
Applicants: PANDROL LTD, PANDROL LIMITED
Application year: 1997
Main classification: E01B9
IPC codes: E01B9