AU613414B2

AU613414B2 - Fastening railway rails

Info

Publication number: AU613414B2
Application number: AU24029/88A
Authority: AU
Inventors: Lance Harkus
Original assignee: Pandrol Ltd
Current assignee: Pandrol Ltd
Priority date: 1987-10-19
Filing date: 1988-10-19
Publication date: 1991-08-01
Anticipated expiration: 2008-10-19
Also published as: AU2402988A

Description

COMMONWEALTH OF AUSTRALIA Patents Act 1952-1969 COMPLETE SPECIFICATION

(ORIGINAL)

Form 613414Cass Class Class FOR OFFICE USE: Application Number Lodged Complete Application No.

Specification Lodged Published Priority: 0 00 Related art: S t 94 This document contains the amendments allowed under Section 83(2) by the Supervising Examiner on and is correct for printing Name of Applicant: Address of Applicant: u I .Actual inventor: i0 TO BE COMPLETED BY APPLICANT PANDROL LIMITED 1 Vincent Square, London, SW1P 2PN England LANCE -ARKUS Address for Service: COLLISON CO., Patent Attorneys, 117 King William Street. Adelaide, South Australia, 5000 u 0 t ca pomplete Specification for the invention entitled: "FASTENING RAILWAY RAILS" The following statement is a full description of this invention, including the best method of performing it known to-fmefs: i j I t It is known to provide an anchoring device which is suitable for use in anchoring a railway rail-fastening clip to a rail foundation, the device including (when in the orientation in which it is used) a part which is to lie above the foundation and is formed with an upper wall section and two opposite upstanding wall sections joined to opposite extremities of the upper wall section, these wall sections partially defining a substantially horizontal passageway.

Such anchoring devices, made by casting metal, are disclosed in Belgian Patent Specification No. 897056 and United States Patent Specification No. 3326466, for example, whereas the latter specification also discloses examples made by bending sheet metal.

In the anchoring devices shown in the drawings in these patent specifications there is no electrically insulating material in the passageways, which in each case receive a single limb of a rail clip made by bending a metal bar of circular cross-section. Thus the clip makes direct contact with the anchoring device. It is, however, stated in the United States specification that a sleeve of plastics material could be fitted into the passageway and the one limb of the clip could be driven into the sleeve. The purpose of the sleeve is not S stated, nor is its shape, but a person skilled in the art would assume S that it is of circular cross-section.

IIr .4 30 Cr C According to the present invention, the anchoring device defined at the beginning is characterised in that one of the upstanding wall sections has, on one side of the passageway, an opening extending outwardly from the passageway and extending over only a portion of the length of the passageway, not including either of the ends of the passageway, which opening can receive a locating projection on the side of an electrically insulating bushing when the latter is inserted in the passageway, in order to locate the bushing.

When the locating projection is present and projects into said opening, the bushing is less likely to move along the passageway when part of the clip is driven into it.

In the accompanying drawings, which show examples in accordance with the invention:- FIG. 1 shows a front elevation of a first anchoring device Fig. 2 shows in elevation the left side of the anchoring device, FIG. 3 shows in elevation the upper part of the right side of the device, FIG. 4 shows a cross-section of the lower part of the device, 2a taken as indicated by the arrows IV in FIG. 2, FIG. 5 shows an elevation of an assembly including the anchoring device, and FIG. 6 shows a corresponding view of an assembly using a different anchoring device.

FIGS. 1 to 4 show an anchoring device 1 which has been made by 1 0 casting malleable steel, the device having a head part 2 and a tail part 3. The head part is formed with a passageway 4 through it, the maximum width of the passageway, measured horizontally in FIG. 1 (which shows the device approximately in the orientation which pertains when the device is in use), which is at least 50 percent greater than its maximum height, measured vertically in FIG. 1. The passageway 4 is bounded on both sides by upstanding wall sections, i.e. on its left side by a nearly vertical wall 5 in which there is formed an opening in the form of a recess 6 which extends outwardly from the passageway 4 and on its right side by an inclined but nearly vertical wall section 7, the wall sections 5 and 7 being joined by curved wall sections 8 and 9 to an upper wall section 10 which is ,substantially horizontal but is slightly inclined to the horizontal.

Due to the presence of the wall sections 8 and 9, the corners where wall sections 5 and 10 and 7 and 10 meet are rounded. A recess 11 is formed in the upper wall section 10 and in the curved wall section 8 in order to save material and there is a step having a vertical face 12 at the junction of the wall sections 9 and $0 0 The recess 6 constitutes, on one side of the passageway, an opening extending outwardly from the passageway and extending over only a portion of the length of the passageway, not including either of the ends of the passagewNay, which opening can receive a locating projection on the outside of an electrically insulating bushing when the latter is inserted in the passageway, in order to locate the 5 bushing.

S At its lower side, the passageway 4 is bounded by two flat surfaces and 16, which are inclined to one another by an angle X which is much greater than 90 degrees and much less than 180 degrees, for example about 135 degrees. The surfaces 15 and 16 are joined by a curved surface 17 and externally the head part has two downwardlyfacing flat surfaces 18 and 19 at the front of the device and similar surfaces 20 and 24 at the rear of the device.

4~ The tail part 3 of the device consists of a single vertical rod 21 from which project, near its bottom, two projections 22 which extend from the rod in opposite directions at right angles to the length of the passageway, which is from left to right in FIGS. 2 and 3 and vertical in FIG. 4. Below the projections 22, at the extreme lower end of the rod 21, there project from the rod 21 two projections 23 which extend from the SoPO 6 a 6 0 6 0 0 p.x 3 rod in opposite directions, again perpendicular to the length of the passageway 4. Over substantially the entire distance from the tops of the projections 22 to the bottom of the head part 2, the rod 21 is of cruciform cross-section, as shown in FIG. 4, so that it has two vanes 26 extending in opposite directions from a central zone 27 and two shorter vanes 28 also extending in opposite directions from the central zone 27. The vanes 26 extend along the underside of the head part 1, as shown at 26A and 26B, and likewise the vanes 28 extend across the underside of the head part 1 as shown at 28A and 28B.

o00 o p 0 0 0 oOO a 0 0 0 00 00000 0 0 r0o oono o a or, a t e oo 0 00 4 0 0 *o 0 0 0 40 0 0 0 UO 0000(1 00 0 0 04 0 The tail part 3 of the device is intended to be incorporated in a concrete railway sleeper. Four of the anchoring devices are suitably supported 15 in a mould and each of them is prevented from rotating by suitable members engaging the vertical face 12 and a projection 29 extending from the wall 5. The concrete envelope and grips the parts 21 to 26, 26A, 26B, 28, 28A and 28B and engages the surfaces 18 to 20 and 24.

When the concrete has set and the four anchoring devices 1 are used to anchor railway rail-fastening clips, the projections 22 and 23 resist forces tending to pull the anchoring devices vertically out of the concrete and the vanes 26 and 28 resist forces tending to rotate the anchoring devices about vertical axes.

25 FIG. 5 shows a concrete railway sleeper 50, and anchoring device 1, according to FIGS 2 to 4, which has its tail part embedded in the sleeper with the passageway 4 above the concrete and a bushing 51 of electrically insulating material the upper side of which is shaped like the upper side of a rectangle with horizontal longer sides and with rounded corners and which is inserted in the passageway 4 and fits it snugly, with the two ends of the bushing projecting beyond the front and the rear of the device 1, i.e. beyond its left-hand and right-hand extremities, considering FIG. 2. The bushing is formed with a projection 52 at its left-hand side which projects into the recess 6 in the wall 5 of the device 1 to locate the bushing, i.e. to fix the bushing to the anchoring device 1.

The bushing also has a passageway 53 extending through it, the shape of cross-section of the passageway being substantially the shape of a conventional athletics race track, with two parallel sides 54 and

C,

aT 3A inclined by a small angle to the horizontal and two sem-circular ends 56 and 57. A substantially e-shaped clip 60, made by bending a steel rod of circular cross-section, has the centre arm 61 and the upper arm 62 of the e driven into the passageway 53, which they fit nicely, and the lower arm 63 of the e bearing downwardly on the flange 65 of a railway rail 66. The flange 65 lies on a resilient pad 67 in a recess 68 in the sleeper, the pad having upstanding side portions 69 at the tops of which there are sideways-projecting portions 70 formed with recesses, one of which receives a part 71 of the clip which joins the arms 62 and 63 to each other.

f t I t

I

I t t I 4 IMTV" IWJ'- "A* _T 'in" 4 FIG. 6 shows a somewhat similar assembly, corresponding parts of which are similarly numbered, but here the anchoring device 170 is made by bending a strip of sheet steel which has a constant width and is imperforate from the top 71 of a tongue 72, of reduced width, to the tops 73 of two arms 74 and 75, of which arm 75 is behind arm 74 and spaced from it so that an opening is formed into which the projection 52 of the bushing extends. The opening extends outwardly 1 0 from the passageway and extends over only a portion of its length, not includir.j either of its ends. The passageway is defined partly by an upper wall section and two upstanding wall sections and again the corners are rounded. In this example the bushing must be assembled with the clip-anchoring device 170 before the latter is placed in the mould which is used to make the concrete railway sleeper: this is not necessary in the case of the assembly showing in FIG. The principle of having a bushing with a passageway 53 through it and a locating projection 52 on it, substantially as shown in the drawings, the bushing fitting into a clip-anchoring device having an opening into which the locating projection extends, can also be applied in 'the case where the rail rests on a steel railway sleeper to the top of which the anchoring device is welded or otherwise fixed; in such a case there will be no tail part or only a much shorter tail part than is shown in the drawings.

In all cases the bushing can be secured to the clip-anchoring device by at least one locating projection projecting into an opening or openings in the clip-anchoring device or by at least one locating projection on the clip-anchoring device projecting into an opening or openings in the bushing. In addition to one or more projections projecting into one or more openings, an adhesive can be used to 2 fasten the bushing to the clip-anchoring device.

t

Claims

1. An anchoring device which is suitable for use in anchoring a railway rail-fastening clip to a rail foundation, the device including (when in the orientation in which it is used) a part, which is to lie above the foundation and is formed with an upper wall section and two opposite upstanding wall sections joined to opposite extremities 1 0 of the upper wall section, these wall sections partially defining a substantially horizontal passageway, one of the upstanding wall sections having, on one side of the passageway, an opening extending outwardly form the passageway and extending over only a portion of the length of the passageway, not including either of the ends of the 1 5 passageway, which opening can receive a locating projection on the outside of an electrically insulating bushing when the latter is inserted in the passageway, in order to locate the bushing.

2. An anchoring device according to claim 1 in which the part which is to lie above the foundation is a head part of a body which also has a tail part which is to be embedded in a concrete rail foundation.

3. An anchoring device according to claim 1 or 2 in which the maximum width of said passageway, measured horizontally is at e least 50% greater than the maximum height, measured vertically.

4. An anchoring device according to any one of claims 1 to 3 and such that when it is in said orieitation said upper wall section is substantially horizontal and said upstanding wall sections are at least nearly vertical, the corners where the wall sections meet being rounded, whereby such an electrically insulating bushing as Ss mentioned in claim 1, having substantially that shape on its upper side, may be inserted in the passageway. An anchoring device according to claim 2 or to claim 3 when dependent on 2 or to claim 4 when dependent on claim 2 in which the tail part comprises a single vertical rod below the head part and a projection, for resisting forces tending to pull the anchoring device vertically out of the concrete, projecting laterally from the rod.

6. An anchoring device according to claim 5 having two projections extending sideways from the rod in opposite directions at right- angles to the length of the passageway. 6

7. An anchoring device according to claim 6 having below said two projections, two more projections extending sideways from the rod in opposite directions at right-angles to the length of the passageway.

8. An anchoring device according to any one of claims 5 to 7 in which the rod is of cruciform cross-section over substantially its 1 0 entire length above the projection or projections.

9. An anchoring device according to any one of claims 5 to 8 in which at its lower side the passageway is bounded by two substantially flat surfaces of the anchoring device inclined to one 1 5 another by an angle which is much greater than 900. An anchoring device according to any one of claims 1 to 9 which has been made by a casting operation and in which said opening which can receive the locating projection on the bushing is a recess which is blind, i.e. it does not reach the exterior of the anchoring device.

11. An anchoring device according to any one of claims 1 to 4 which has been made from sheet metal and which comprises two legs 0 extending downwardly from opposite ones of said upstanding wall sections, one of the legs being bifurcated, the upper part of che gap S between the two arms thus produced constituting said opening for receiving said locating projection, there being no part of the anchoring device vertically below the passageway and partially defining it.

12. An anchoring device according to any one of claims 1 to 11 having such a bushing of electrically insulating material as o mentioned in claim 1, inserted in the passageway, said bushing having o° its locating projection at one side projecting into said opening.

13. An anchoring device and bushing combination according to claim 12 in which the bushing has a passageway through it, the cross- section of which has two substantially straight and parallel sides and two substantially semi-circular ends.

14. An anchoring device and bushing combination according to claim 12 or 13 having, vertically below said passageway, two downwardly- facing surfaces, for engagement with a concrete foundation for a railway rail, which are substantially flat and inclined to one another by an angle substantially greater than 900 and substantially less than S1800 7 An anchoring device which is suitable for use in anchoring a railway rail-fastening clip, substantially as hereinbefore described with reference to Figures 1 to 4 or Figure 6 of the accompanying drawings.

16. An assembly of a clip-anchoring device and a bushing, 1 0 substantially as hereinbefore described with reference to Figures 1 to 4 or Figure 6 of the accompanying drawings. Dated this 1st day of May 1991 1 5 PANDROL LIMITED By their Patent Attorneys COLLISON CO. t t 2 1 I 11 -t 4. .I t i