GB2095311A - Reinforced insulating device for use in a railway track fastening - Google Patents

Reinforced insulating device for use in a railway track fastening Download PDF

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Publication number
GB2095311A
GB2095311A GB8108878A GB8108878A GB2095311A GB 2095311 A GB2095311 A GB 2095311A GB 8108878 A GB8108878 A GB 8108878A GB 8108878 A GB8108878 A GB 8108878A GB 2095311 A GB2095311 A GB 2095311A
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GB
United Kingdom
Prior art keywords
rail
flange
anchorage
clip
insulating material
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
GB8108878A
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GB2095311B (en
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Pandrol Ltd
Original Assignee
Pandrol Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Pandrol Ltd filed Critical Pandrol Ltd
Priority to GB8108878A priority Critical patent/GB2095311B/en
Publication of GB2095311A publication Critical patent/GB2095311A/en
Application granted granted Critical
Publication of GB2095311B publication Critical patent/GB2095311B/en
Expired legal-status Critical Current

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Classifications

    • E—FIXED CONSTRUCTIONS
    • E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01B—PERMANENT WAY; PERMANENT-WAY TOOLS; MACHINES FOR MAKING RAILWAYS OF ALL KINDS
    • E01B9/00—Fastening rails on sleepers, or the like
    • E01B9/02—Fastening rails, tie-plates, or chairs directly on sleepers or foundations; Means therefor
    • E01B9/28—Fastening on wooden or concrete sleepers or on masonry with clamp members
    • E01B9/30—Fastening on wooden or concrete sleepers or on masonry with clamp members by resilient steel clips
    • E01B9/303—Fastening on wooden or concrete sleepers or on masonry with clamp members by resilient steel clips the clip being a shaped bar

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Railway Tracks (AREA)

Abstract

To electrically insulate a flange- footed railway rail from a rail clip 1 and from an anchorage 4 for the clip, there is provided a device including electrically insulating material 8 part of which is interposed between the clip and the top of the rail flange 7 and part of which is interposed between the edge of the rail flange 7 and the anchorage 4. The device also includes a metallic reinforcing member 9 the whole of which is flat. Part of it is interposed between the clip and the top of the rail flange 7 and two projections on it have part of the anchorage lying between them so that the device cannot move far along the rail. <IMAGE>

Description

SPECIFICATION A device for use in a railway track to electrically insulate a rail According to a first aspect of the invention, there is provided a device which is suitable for use in a railway track to electrically insulate a flangefooted railway rail from a rail clip, which bears downwardly upon the upper surface of the rail flange, and from an anchorage, at one side of the rail flange, for the rail clip, the device including an electrically insulating part made of a first material and having a first portion which is to be interposed between the rail clip and the upper surface of the rail flange and also having a second portion which is to be interposed between the edge of the rail flange and the anchorage, the device also including a reinforcing part which is made of a second material and has a plate-like portion which is to be interposed between the rail clip and the upper surface of the rail flange, the plate-like portion having a thickness which is at least 3 mm, or is greater than the thickness of most of the first portion of the insulating part or is both at least 3 mm. and greater than the thickness of most of the first portion of the insulating part.
The thickness of the plate-like portion of the reinforcing part could be 4 mm. or more, better still 5 mm. or more.
Preferably, the insulating part and the reinforcing part are fastened together before delivery of the device to the site where it is to be installed. Thus the insulating part may be moulded around the reinforcing part or the two parts may be manufactured separately and later bonded together and/or fastened together by virtue of elasticity of the insulating part.
The second portion of the insulating part may extend along the rail for a distance of more than 5 cm. Thus it may have about the same length, measured along the rail, as the first portion of the insulating part. Alternatively, the second portion of the insulating part may be one of two or more much shorter lugs, spaced apart along the rail, which depend from the first portion and are interposed between the rail flange and the anchorage.
The reinforcing part is preferably of metal, for example steel. It is preferably entirely flat and made of sheet material. It may comprise two lugs between which part of the anchorage lies, the lugs preventing the device from moving along the rail.
Alternatively, or in addition, the insulating part may have two lugs which serve the same purpose.
According to a second aspect of the invention, there is provided an assembly on a railway track including a rail foundation, a flange-footed railway rail standing on the rail foundation, an anchorage beside one edge of the rail flange, a rail clip driven into the anchorage, a device according to the first aspect of the invention having the first portion of the insulating part and the plate-like portion of the reinforcing part lying on the rail flange and the second portion of the insulating part between the edge of the rail flange and the anchorage, part of the rail clip bearing downwardly on the rail flange via said device.
In the accompanying drawings: Figure 1 shows an end view of an assembly on a railway track, the assembly including a device according to the first aspect of the invention, Figure 2 shows an end view of the device, and Figure 3 shows a plan view of the device.
Figure 1 shows an assembly like that of Figures 1 to 3 of British Patent Specification No.
1,213,762, the assembly including a clip 1 in accordance with Figures 4 to 6 of that specification, a concrete railway sleeper 2, a pad 3, an anchorage 4 having a hole 5 through it into which the straight leg 6 of the clip is driven, a flange-footed railway rail having a flange 7 and, instead of the nylon moulding 4 of specification No 1,213,762, a device comprising an electrically insulating part 8 and a reinforcing part 9.
The reinforcing part 9 consists of a flat piece of sheet steel 5 mm. thick and about 102 mm. long in the form of a rectangular plate-like portion 10 from one longer side of which extend two lugs 11, between which lies the side nearest the rail of the anchorage 4.
The insulating part 8 is moulded from nylon and is about 20 mm. longer than the reinforcing part and it includes a first portion 12 which lies beneath the portion 10 and is slightly longer and thinner than the latter, the portion 12 being 3 mm.
thick. The portion 1 2 extends over most of the area of the insulating part 8 as seen in plan view (Figure 3). It is inclined by about 120 to the horizontal in the position in which it is used, which is approximately the position in which it is shown in Figure 2.
At each end of the portion 12 is an upstanding wall 13 the top 14 of which is a little higher than the upper surface of the portion 10 of the reinforcing part. Along the longer side of the portion 12 which is remote from the anchorage 4 is an upstanding wall 1 5 from the top of which a ledge 1 6 projects a short distance towards the anchorage 4, over the upper surface of the portion 10 of the reinforcing part. Along the other longer side of the portion 12 there is a vertical depending flange 1 7 which extends over the entire length of the portion 12 and at each end has a lug 18 extending away from the rail, part of the anchorage 4 lying between the two lugs.
The reinforcing part 9 is a push-fit in the insulating part 8 so that the two parts tend not to become separated or become incorrectly positioned relatively to one another in normal handling of the device.
1. A device which is suitable for use in a railway track to electrically insulate a flange-footed railway rail from a rail clip, which bears downwardly upon the upper surface of the rail flange, and from an anchorage beside one edge of the rail flange, for the rail clip, the device including electrically insulating material which is to be
**WARNING** end of DESC field may overlap start of CLMS **.

Claims (14)

**WARNING** start of CLMS field may overlap end of DESC **. SPECIFICATION A device for use in a railway track to electrically insulate a rail According to a first aspect of the invention, there is provided a device which is suitable for use in a railway track to electrically insulate a flangefooted railway rail from a rail clip, which bears downwardly upon the upper surface of the rail flange, and from an anchorage, at one side of the rail flange, for the rail clip, the device including an electrically insulating part made of a first material and having a first portion which is to be interposed between the rail clip and the upper surface of the rail flange and also having a second portion which is to be interposed between the edge of the rail flange and the anchorage, the device also including a reinforcing part which is made of a second material and has a plate-like portion which is to be interposed between the rail clip and the upper surface of the rail flange, the plate-like portion having a thickness which is at least 3 mm, or is greater than the thickness of most of the first portion of the insulating part or is both at least 3 mm. and greater than the thickness of most of the first portion of the insulating part. The thickness of the plate-like portion of the reinforcing part could be 4 mm. or more, better still 5 mm. or more. Preferably, the insulating part and the reinforcing part are fastened together before delivery of the device to the site where it is to be installed. Thus the insulating part may be moulded around the reinforcing part or the two parts may be manufactured separately and later bonded together and/or fastened together by virtue of elasticity of the insulating part. The second portion of the insulating part may extend along the rail for a distance of more than 5 cm. Thus it may have about the same length, measured along the rail, as the first portion of the insulating part. Alternatively, the second portion of the insulating part may be one of two or more much shorter lugs, spaced apart along the rail, which depend from the first portion and are interposed between the rail flange and the anchorage. The reinforcing part is preferably of metal, for example steel. It is preferably entirely flat and made of sheet material. It may comprise two lugs between which part of the anchorage lies, the lugs preventing the device from moving along the rail. Alternatively, or in addition, the insulating part may have two lugs which serve the same purpose. According to a second aspect of the invention, there is provided an assembly on a railway track including a rail foundation, a flange-footed railway rail standing on the rail foundation, an anchorage beside one edge of the rail flange, a rail clip driven into the anchorage, a device according to the first aspect of the invention having the first portion of the insulating part and the plate-like portion of the reinforcing part lying on the rail flange and the second portion of the insulating part between the edge of the rail flange and the anchorage, part of the rail clip bearing downwardly on the rail flange via said device. In the accompanying drawings: Figure 1 shows an end view of an assembly on a railway track, the assembly including a device according to the first aspect of the invention, Figure 2 shows an end view of the device, and Figure 3 shows a plan view of the device. Figure 1 shows an assembly like that of Figures 1 to 3 of British Patent Specification No. 1,213,762, the assembly including a clip 1 in accordance with Figures 4 to 6 of that specification, a concrete railway sleeper 2, a pad 3, an anchorage 4 having a hole 5 through it into which the straight leg 6 of the clip is driven, a flange-footed railway rail having a flange 7 and, instead of the nylon moulding 4 of specification No 1,213,762, a device comprising an electrically insulating part 8 and a reinforcing part 9. The reinforcing part 9 consists of a flat piece of sheet steel 5 mm. thick and about 102 mm. long in the form of a rectangular plate-like portion 10 from one longer side of which extend two lugs 11, between which lies the side nearest the rail of the anchorage 4. The insulating part 8 is moulded from nylon and is about 20 mm. longer than the reinforcing part and it includes a first portion 12 which lies beneath the portion 10 and is slightly longer and thinner than the latter, the portion 12 being 3 mm. thick. The portion 1 2 extends over most of the area of the insulating part 8 as seen in plan view (Figure 3). It is inclined by about 120 to the horizontal in the position in which it is used, which is approximately the position in which it is shown in Figure 2. At each end of the portion 12 is an upstanding wall 13 the top 14 of which is a little higher than the upper surface of the portion 10 of the reinforcing part. Along the longer side of the portion 12 which is remote from the anchorage 4 is an upstanding wall 1 5 from the top of which a ledge 1 6 projects a short distance towards the anchorage 4, over the upper surface of the portion 10 of the reinforcing part. Along the other longer side of the portion 12 there is a vertical depending flange 1 7 which extends over the entire length of the portion 12 and at each end has a lug 18 extending away from the rail, part of the anchorage 4 lying between the two lugs. The reinforcing part 9 is a push-fit in the insulating part 8 so that the two parts tend not to become separated or become incorrectly positioned relatively to one another in normal handling of the device. CLAIMS
1. A device which is suitable for use in a railway track to electrically insulate a flange-footed railway rail from a rail clip, which bears downwardly upon the upper surface of the rail flange, and from an anchorage beside one edge of the rail flange, for the rail clip, the device including electrically insulating material which is to be interposed between the rail clip and the upper surface of the rail flange and electrically insulating material which is to be interposed between the edge of the rail flange and the anchorage, the device alsojncluding a metallic reinforcing member the whole of which is flat, with two opposite and parallel flat faces, a portion of which member is to be interposed between the rail clip and the upper surface of the rail flange, the reinforcing member including two spaced-apart projections between which part of the anchorage is to lie so that the device cannot move far along the rail.
2. A device according to claim 1 in which the thickness of the reinforcing member is 3 mm. or more.
3. A device according to claim 2 in which said thickness is 4 mm. or more.
4. A device according to claim 3 in which said thickness is 5 mm. or more.
5. A device according to any preceding claim in which the thickness of the reinforcing member is greater than the maximum total thickness of insulating material which is to be interposed between the rail clip and the rail flange.
6. A device according to any preceding claim in which the insulating material has been moulded around the reinforcing member.
7. A device according to any one of claims 1 to 5 in which the insulating material and said member having been manufactured separately and later bonded together and/or fastened together by virtue of elasticity of the insulating material.
8. A device according to any preceding claim in which the upper face of the reinforcing member is exposed at the top of the device.
9. A device according to any preceding claim in which there is an upstanding wall of insulating material at the side of the device further from said projections and a ledge extending from the top of said wall towards said projections and overlying a part of the reinforcing member.
10. A device according to any preceding claim in which there are two lugs of electrically insulating material; integral with the insulating material mentioned in claim 1, between which the lugs part of the anchorage is to lie so that the insulating material cannot move far along the rail with respect to said reinforcing member
11. A device according to any preceding claim having two upstanding walls of electrically insulating material, integral with the insulating material mentioned in claim 1, at opposite ends of the reinforcing member, the walls ensuring that the insulating material cannot move far along the rail with respect to said reinforcing member.
12. A device for insulating a flange-footed rail from a rail clip and from an anchorage for the clip, substantially as hereinbefore described with reference to the accompanying drawings.
13. An assembly on a railway track including a rail foundation, a flange-footed railway rail standing on the rail foundation, an anchorage beside one edge of the rail flange, a rail clip driven into the anchorage, a device according to any preceding claim having the insulating material first mentioned in claim 1 and part of the reinforcing member lying on the rail flange and the other insulating material mentioned in claim 1 between the edge of the rail flange and the anchorage, part of the rail clip bearing downwardly on the rail flange via said device.
14. An assembly on a railway track substantially as hereinbefore described with reference to the accompanying drawings.
GB8108878A 1981-03-20 1981-03-20 Reinforced insulating device for use in a railway track fastening Expired GB2095311B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB8108878A GB2095311B (en) 1981-03-20 1981-03-20 Reinforced insulating device for use in a railway track fastening

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB8108878A GB2095311B (en) 1981-03-20 1981-03-20 Reinforced insulating device for use in a railway track fastening

Publications (2)

Publication Number Publication Date
GB2095311A true GB2095311A (en) 1982-09-29
GB2095311B GB2095311B (en) 1985-02-20

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Family Applications (1)

Application Number Title Priority Date Filing Date
GB8108878A Expired GB2095311B (en) 1981-03-20 1981-03-20 Reinforced insulating device for use in a railway track fastening

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Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4566631A (en) * 1982-02-15 1986-01-28 Pandrol Limited Electrically insulating railway rails from rail-fastening means
US4569477A (en) * 1983-09-09 1986-02-11 Dayco Corporation Railroad track insulator and part therefor
WO1993012295A1 (en) * 1991-12-18 1993-06-24 Pandrol Limited Insulators for use in railway rail-fastening assemblies
US5474233A (en) * 1993-02-05 1995-12-12 Allevard Insert with retaining boss for fixation of a rail clip
US6685100B1 (en) * 1999-11-18 2004-02-03 Young Gil Jang Rail clip fixing implement
US10392754B2 (en) 2015-04-09 2019-08-27 Progress Rail Services Corporation Recessed concrete rail seat assembly

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4566631A (en) * 1982-02-15 1986-01-28 Pandrol Limited Electrically insulating railway rails from rail-fastening means
US4569477A (en) * 1983-09-09 1986-02-11 Dayco Corporation Railroad track insulator and part therefor
WO1993012295A1 (en) * 1991-12-18 1993-06-24 Pandrol Limited Insulators for use in railway rail-fastening assemblies
US5474233A (en) * 1993-02-05 1995-12-12 Allevard Insert with retaining boss for fixation of a rail clip
US6685100B1 (en) * 1999-11-18 2004-02-03 Young Gil Jang Rail clip fixing implement
US10392754B2 (en) 2015-04-09 2019-08-27 Progress Rail Services Corporation Recessed concrete rail seat assembly

Also Published As

Publication number Publication date
GB2095311B (en) 1985-02-20

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Date Code Title Description
PCNP Patent ceased through non-payment of renewal fee

Effective date: 19950320