GB2074638A

GB2074638A - Securing railway rails to sleepers

Info

Publication number: GB2074638A
Application number: GB8107852A
Authority: GB
Original assignee: RAJARAM B
Current assignee: RAJARAM B
Priority date: 1979-03-13
Filing date: 1981-03-12
Publication date: 1981-11-04
Also published as: IN153328B; GB2074638B

Abstract

In a rail fastening comprising a spring rod rail clip 1 and an anchorage such as shoulder 7, the clip has at each end sinuously curved portions 2-2A-4 which extend away from the rail to bear upwardly on a retaining pin 5 and downwardly on an outer reaction pin seated on the shoulder, both pins extending parallel to the rail. The pin 5 may, as shown, pass through a longitudinal bore in the shoulder 7 and have waisted ends. In modifications (a) the outer reaction pin is omitted and the clip ends bent to bear directly on the shoulder, and (b) the shoulder 7 and removable pin 5 are replaced by a central retaining member having oppositely-directed horizontal pins (Fig. 11, not shown). <IMAGE>

Description

SPECIFICATION Means for resiliently securing the rail to the sleeper This invention relates to means for resiliently securing the rail to the sleeper.

The object of the present invention is to propose a clip and rail fastening assembly for securing the rail in a resilient manner.

It is already known to use an insert which has a stem which is embedded in the concrete sleeper and has an opening through which passes one leg of a clip which clip has a toe that rests on the flange of the rail while its heel rests on the shoulder of the insert.

The object of this invention is to have a simple clip and fastening assembly in which the clip can be easily manufactured e.g. from silica manganese steel rod.

According to this invention the rail fastening means for resiliently securing the rail to the sleeper comprises an insert one on each side of the rail and a clip for each side of the rail, said clip comprising a toe member adapted to rest on the flange or foot of the rail on either side, said toe member being bent upwardly at each end to form a toe curve of substantially inverted U shape in a plane generally perpendicular to the toe member, then extending downwardly to form a reverse central curve or loop and then finally extending upwardly to form in termination a heel curve in reverse direction to the said central loop, a central pin in the eye of the insert being held within and against the central curve or loop, said pin extending on either side from the insert and a second or heel pin held between the said heel curve and the shoulder of the insert.

According to another feature of this invention, instead of having a pin passing through the eye of the insert, the insert may be so constructed as to have a pin projecting on either side of the insert. It is also possible to dispense with the second pin or heel pin and to bend the free ends towards each other to rest on the shoulder of the insert.

The invention will now be described with reference to the accompanying drawings in which: Figure 1 shows side view of the clip; Figure 2 shows end view of the clip; Figure 3 shows plan view of the clip; Figures 4, 5 and 6 show different types of pins that can be used.

Figure 7 shows the assembly of the clip and the insert as fitted to the rail also showing a liner; Figures 8 and 9 show an insert in elevation and side view respectively in which a single pin is used.

Figure 10 shows elevation of an assembly for use with wooden sleepers.

Figure 11 shows end view of the arrangement shown in Figure 10.

Referring to the drawings, the clip shown in Figs. 1 and 2 has a toe member which preferably has a flat surface at the area of contact with the rail, when a liner of low strength is used. The toe member 1 is bent at its two opposite ends to form a toe curve 2 of substantially inverted U shape in a plane generally perpendicular to the toe member.

It is then bent downwardly to form generally the shape of U which constitutes the central loop or curve 2A. The rod of which the clip is made, is then bent upwardly to form a short bent portion 3 referred to as heel curve and then extending in a length at a tangent to the heel curve as shown at 4. The loop and the curves at both ends of the toe member 1 are the same.

Referring to Figs. 4, 5 and 6, 5 is the pin which is introduced in the eye 6 of the insert 7 and projects on both sides to be seated in the central curve or loops 2A as illustrated in Fig. 7. The pin in Fig. 4 is inserted in the eye 6 and has its ends 8 projecting out which are made of reduced sections but are made thicker at the ends 9. Alternatively, as shown in Fig. 5, the pin is made of same diameter throughout but the ends 9 are made thicker, while in Fig. 6, the pin is made of thinner section than the ends which are made thicker.

All these pins are so constructed as to be prevented from slipping out or hammered out from the eye of the insert.

Referring to Figs. 8 and 9 the insert 7 is embedded in the concrete sleeper. It has an eye 6 in which the pin is inserted to project out from the ends. 11 is the shoulder. Instead of a pin 5, the insert may have projections at either ends.

In the case of Fig. 1, the pin 5 is held within the central loops 2A and the inner top surface of the eye and another pin 1 2 is inserted between the heel curve 3 and the shoulder of the insert, but in the case of insert shown in Figs. 8 and 9 this pin 12 is not employed but the free ends of the heel curve of the clip are bent towards each other to rest on the shoulder 11.

Referring to Figs. 10 and 11 which show the clip for use with wooden sleepers, the spike 13 is screwed into the sleeper (not shown) through a U shaped piece 14. The piece 14 has two vertical projections to which are secured or are fcrmed therewith projections 1 5 which are engaged by the loop or curved portions 2A of the clip.

Conceptually this shape of the clip is unlike any other system in use in the world and the optimal use of material results in very light-weight clip.

There are three important bends, referred to as heel curve, central curve or loop and toe curve, one at the heel, second one at centre and the third connecting the central curve or loop to the toe.

The toe load is exerted over a line or surface contact and this is obtained by the flexural resilient action obtained in the three important bends provided in the two legs extending from toe member 1.

The pins used at heel and central curve allow for restoring the toe load if lost in service by using larger diameter pins.

1. Rail fastening means for resiliently securing the rail to the sleeper comprises an insert one on each side of the rail and a clip for each side of the rail, said clip comprising a toe member adapted to

**WARNING** end of DESC field may overlap start of CLMS **.

Claims

**WARNING** start of CLMS field may overlap end of DESC **. SPECIFICATION Means for resiliently securing the rail to the sleeper This invention relates to means for resiliently securing the rail to the sleeper. The object of the present invention is to propose a clip and rail fastening assembly for securing the rail in a resilient manner. It is already known to use an insert which has a stem which is embedded in the concrete sleeper and has an opening through which passes one leg of a clip which clip has a toe that rests on the flange of the rail while its heel rests on the shoulder of the insert. The object of this invention is to have a simple clip and fastening assembly in which the clip can be easily manufactured e.g. from silica manganese steel rod. According to this invention the rail fastening means for resiliently securing the rail to the sleeper comprises an insert one on each side of the rail and a clip for each side of the rail, said clip comprising a toe member adapted to rest on the flange or foot of the rail on either side, said toe member being bent upwardly at each end to form a toe curve of substantially inverted U shape in a plane generally perpendicular to the toe member, then extending downwardly to form a reverse central curve or loop and then finally extending upwardly to form in termination a heel curve in reverse direction to the said central loop, a central pin in the eye of the insert being held within and against the central curve or loop, said pin extending on either side from the insert and a second or heel pin held between the said heel curve and the shoulder of the insert. According to another feature of this invention, instead of having a pin passing through the eye of the insert, the insert may be so constructed as to have a pin projecting on either side of the insert. It is also possible to dispense with the second pin or heel pin and to bend the free ends towards each other to rest on the shoulder of the insert. The invention will now be described with reference to the accompanying drawings in which: Figure 1 shows side view of the clip; Figure 2 shows end view of the clip; Figure 3 shows plan view of the clip; Figures 4, 5 and 6 show different types of pins that can be used. Figure 7 shows the assembly of the clip and the insert as fitted to the rail also showing a liner; Figures 8 and 9 show an insert in elevation and side view respectively in which a single pin is used. Figure 10 shows elevation of an assembly for use with wooden sleepers. Figure 11 shows end view of the arrangement shown in Figure 10. Referring to the drawings, the clip shown in Figs. 1 and 2 has a toe member which preferably has a flat surface at the area of contact with the rail, when a liner of low strength is used. The toe member 1 is bent at its two opposite ends to form a toe curve 2 of substantially inverted U shape in a plane generally perpendicular to the toe member. It is then bent downwardly to form generally the shape of U which constitutes the central loop or curve 2A. The rod of which the clip is made, is then bent upwardly to form a short bent portion 3 referred to as heel curve and then extending in a length at a tangent to the heel curve as shown at 4. The loop and the curves at both ends of the toe member 1 are the same. Referring to Figs. 4, 5 and 6, 5 is the pin which is introduced in the eye 6 of the insert 7 and projects on both sides to be seated in the central curve or loops 2A as illustrated in Fig. 7. The pin in Fig. 4 is inserted in the eye 6 and has its ends 8 projecting out which are made of reduced sections but are made thicker at the ends 9. Alternatively, as shown in Fig. 5, the pin is made of same diameter throughout but the ends 9 are made thicker, while in Fig. 6, the pin is made of thinner section than the ends which are made thicker. All these pins are so constructed as to be prevented from slipping out or hammered out from the eye of the insert. Referring to Figs. 8 and 9 the insert 7 is embedded in the concrete sleeper. It has an eye 6 in which the pin is inserted to project out from the ends. 11 is the shoulder. Instead of a pin 5, the insert may have projections at either ends. In the case of Fig. 1, the pin 5 is held within the central loops 2A and the inner top surface of the eye and another pin 1 2 is inserted between the heel curve 3 and the shoulder of the insert, but in the case of insert shown in Figs. 8 and 9 this pin 12 is not employed but the free ends of the heel curve of the clip are bent towards each other to rest on the shoulder 11. Referring to Figs. 10 and 11 which show the clip for use with wooden sleepers, the spike 13 is screwed into the sleeper (not shown) through a U shaped piece 14. The piece 14 has two vertical projections to which are secured or are fcrmed therewith projections 1 5 which are engaged by the loop or curved portions 2A of the clip. Conceptually this shape of the clip is unlike any other system in use in the world and the optimal use of material results in very light-weight clip. There are three important bends, referred to as heel curve, central curve or loop and toe curve, one at the heel, second one at centre and the third connecting the central curve or loop to the toe. The toe load is exerted over a line or surface contact and this is obtained by the flexural resilient action obtained in the three important bends provided in the two legs extending from toe member 1. The pins used at heel and central curve allow for restoring the toe load if lost in service by using larger diameter pins. CLAIMS

1. Rail fastening means for resiliently securing the rail to the sleeper comprises an insert one on each side of the rail and a clip for each side of the rail, said clip comprising a toe member adapted to rest on the flange or foot of the rail on either side, said toe member being bent upwardly at each end to form a toe curve of substantially inverted U shape in a plane generally perpendicular to the toe member then extending downwardly to form a reverse central curve or loop and then finally extending upwardly to form in termination a heel curve in reverse direction to the said central loop, a central pin in the eye of the insert being held within and against the central curve or loop, said pin extending on either side from the insert and a second or heel pin held between the said heel curve and the shoulder of the insert.

2. Rail fastening means as claimed in claim 1 in which the toe curve at each end of the toe member is at a higher level than the central pin while the central curve or loop is so disposed in relation to the insert that it is below the central pin extending from the insert and the heel curve is so disposed that the pin held by the same is firm on the shoulder of the insert.

3. Rail fastening means as claimed in claim 1 in which a pin is firmly held in the eye of the insert and projects on either side of the insert and the projections are held against the central curves or loops of the clip.

4. Rail fastening means as claimed in claim 3 in which the insert is provided with projections on either side which projections are held against the central curves or loops of the clip.

5. A rail fastening assembly as claimed in claim 1 in which the toe member which is seated on the upper surface of the rail flange is generally a straight member and at its contact with the rail flange or the liner on the rail flange, it may have a flat surface.

6. A rail fastening assembly as claimed in claim 1 in which the central pin is of smaller diameter at the projections than the portion within the insert but is made thicker at the free ends to prevent the pin from being pulled out, alternatively the free ends are made as butt ends or the projections that engage the central loops of the clip are made of larger diameter than the pin portion within the insert.

7. A rail fastening assembly as claimed in claim 1 in which when the assembly is used with a wooden sleeper, then there is provided a U shaped piece through which passes the screw spike, while the vertical members are provided with projections to be held against the central curves or loops of the clip.

8. A rail fastening assembly as claimed in claim 1 in which the toe curve is of substantially inverted U shape while the central curve or loop is of substantially U shape.

9. A rail fastening assembly as claimed in claim 1 in which only one pin is employed to pass through the eye of the insert to project on either side of the insert to hold the central curve or loop or projections are provided to extend on either side of the insert and are used to engage the said loops while the second pin is avoided in which case the free ends of the clip are further bent or extended towards each other to rest on the shoulder of the insert.

10. Rail fastening means for resiliently securing the rail to the sleeper substantially as described herein with reference to the accompanying drawings.