GB2117035A - Railway rail-fastening clips - Google Patents

Railway rail-fastening clips Download PDF

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Publication number
GB2117035A
GB2117035A GB08202927A GB8202927A GB2117035A GB 2117035 A GB2117035 A GB 2117035A GB 08202927 A GB08202927 A GB 08202927A GB 8202927 A GB8202927 A GB 8202927A GB 2117035 A GB2117035 A GB 2117035A
Authority
GB
United Kingdom
Prior art keywords
clip
block
structural unit
flat surface
figures
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
GB08202927A
Other versions
GB2117035B (en
Inventor
Brian George Conroy
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 GB08202927A priority Critical patent/GB2117035B/en
Priority to AU10700/83A priority patent/AU1070083A/en
Publication of GB2117035A publication Critical patent/GB2117035A/en
Application granted granted Critical
Publication of GB2117035B publication Critical patent/GB2117035B/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)
  • Connection Of Plates (AREA)
  • Railway Tracks (AREA)

Abstract

A rail-fastening clip which has been made by bending a metal rod has on one side a flat surface (5A) to which is bonded a flat surface of a block (40) of electrically insulating material. The flat surface (5A) may be formed either at a part of the clip which is to bear downwardly on the upper side of a flange at the bottom of the railway rail, so that the clip bears downwardly on the flange through the intermediary of the block, or at a part of the clip which is to bear downwardly on a metal anchorage for the clip, so that the clip bears downwardly on said part through the intermediary of the block. <IMAGE>

Description

SPECIFICATION Railway rail-fastening clips According to the invention, there is provided a structural unit comprising a railway rail-fastening clip which has been made by bending a metal rod and which has on one side a flat surface to which is bonded a flat surface, parallel to the flat surface of the clip, on a block of electrically insulating material, there being no other metal part in the structural unit on the side of the block further from the flat surface on the block.
The clip may have been made be bending a steel rod of circular cross-section and forming said flat surface of the clip either at a part of the clip which is to bear downwardly on the upper side of a flange at the bottom of a railway rail, so that the clip bears downwardly on the flange through the intermediary of the block, or at a part of the clip which is to bear downwardly on a metal anchorage for the clip, so that the clip bears downwardly on said part through the intermediary of the block. In the latter case the clip may directly contact the flange on the rail and be electrically insulated from the anchorage.
The clip may, for example, be a so-called "P-R clip" such as is disclosed in British Patent Specification No. 861,473 (the inventor was a Mr.
Pande-Rolfsen) or No. 869,385 (Figures 1 to 3), or it may be a so-called "flat-toe P-R clip-" as disclosed in British Patent Specification No.
1,213,762 (Figures 4 to 6). Alternatively, the clip may be a so-called "short-heel P-P clip", such as is disclosed in British Patent Specification No.
1,497,908, or a so-called "e-clip", such as is disclosed in British Patent Specification No.
1,510,224.
In the accompanying drawings:- Figures 1 and 3 show three views of a rail clip which has a block of electrically insulating material bonded to it, although this is not shown in Figure 3, Figures 4 to 6 show three views of another rail clip which has no such block bonded into it but could have one bonded to it, Figures 7 to 9 show an assembly on a railway track, Figure 10 shows a side view of a block of electrically insulating material, and Figure 11 shows a plan view of the same block.
Figures 1 to 9 are copies of the correspondingly numbered figures in British Patent Specification No. 1,510,224 except that Figures 1 and 2 show a modification of the upper side of the "fifth portion" 5 of the clip and a block 40 of electrically insulating material having a flat upper surface which is parallel to and bonded to the flat surface 5A at the lower side of the "fifth portion" 5 of the clip. There is no other metal part, in the structural unit comprising the clip and the block 40, on the lower side of the block 40.
The clip according to Figures 4 to 6 may in the same way have a block 40 of electrically insulating material bonded to its flat surface 5A.
An assembly according to Figures 7 to 9 may be modified by replacing the illustrated clip by a structural unit comprising a clip and a block as described above and replacing the insulator 24 shown in Figures 7 to 9 by an insulator which insulates the block 33 from the rail but does not extend over any part of the upper surface of the rail flange. The lower side of the block 40 then directly contacts the upper surface of the rail flange.
For a more complete description of other parts of Figures 1 to 9, see Specification No. 1,510,224.
The block 41 shown in Figures 10 and 11 may be used instead of the block 40. Like the latter, it is broader at one end 42, where the end face of the insulator is flat and perpendicular to the flat and parallel upper and lower faces of the block, than it is at the other end 43 but the width of the end 42 of the block 41 is greater than the width of the corresponding end of the block 40.
The blocks 40 and 41 are preferably made by casting suitable material to the desired final shape in a mould.
In both cases, the block is about 6 mm thick, although it may be thinner or thicker, for example anywhere within the range 4 to 9 mm, and about 33 mm long, although it may be shorter or longer, for example anywhere within the range 20 to 40 mm.
Figure 11 show that a line 44 joining the midpoint of the end 42 of the block 41 to the point at the end 43 which is further from the end 42 is not quite perpendicular to the end 42. The major faces of the block 41 are somewhat in the form of a flat iron. It is the end 42 of the block which is nearer the extreme end B of the clip.
The material of the blocks 40 and 41 is preferably a urethane elastomer or a polyether elastomer, and it is bonded to the flat surface on the clip by an adhesive, for example a cyanoacrylate type instant-bond adhesive.
It is possible to apply all over the part 5 of the clip and over all or the upper part of the block 40 or 41 a layer of electrically insulating material which extends also a short distance along the part 4 of the clip, the purpose being to create a longer surface leakage path between the clip and the rail flange or the anchorage for the clip in the case where it is upon that which the clip bears through the intermediary of the block.
It is also possible to provide recesses, for example grooves, in the flat surface of the clip and/or the flat surface of the block which is bonded to the clip, in order to provide a better key.
1. A structural unit comprising a railway railfastening clip which has been made by bending a metal rod and which has on one side a flat surface to which is bonded a flat surface, parallel to the flat surface of the clip, on a block of electrically insulating material, there being no other metal part in the structural unit on the side of the block further from the flat surface on the block.
2. A structural unit as claimed in claim 1,
**WARNING** end of DESC field may overlap start of CLMS **.

Claims (14)

**WARNING** start of CLMS field may overlap end of DESC **. SPECIFICATION Railway rail-fastening clips According to the invention, there is provided a structural unit comprising a railway rail-fastening clip which has been made by bending a metal rod and which has on one side a flat surface to which is bonded a flat surface, parallel to the flat surface of the clip, on a block of electrically insulating material, there being no other metal part in the structural unit on the side of the block further from the flat surface on the block. The clip may have been made be bending a steel rod of circular cross-section and forming said flat surface of the clip either at a part of the clip which is to bear downwardly on the upper side of a flange at the bottom of a railway rail, so that the clip bears downwardly on the flange through the intermediary of the block, or at a part of the clip which is to bear downwardly on a metal anchorage for the clip, so that the clip bears downwardly on said part through the intermediary of the block. In the latter case the clip may directly contact the flange on the rail and be electrically insulated from the anchorage. The clip may, for example, be a so-called "P-R clip" such as is disclosed in British Patent Specification No. 861,473 (the inventor was a Mr. Pande-Rolfsen) or No. 869,385 (Figures 1 to 3), or it may be a so-called "flat-toe P-R clip-" as disclosed in British Patent Specification No. 1,213,762 (Figures 4 to 6). Alternatively, the clip may be a so-called "short-heel P-P clip", such as is disclosed in British Patent Specification No. 1,497,908, or a so-called "e-clip", such as is disclosed in British Patent Specification No. 1,510,224. In the accompanying drawings:- Figures 1 and 3 show three views of a rail clip which has a block of electrically insulating material bonded to it, although this is not shown in Figure 3, Figures 4 to 6 show three views of another rail clip which has no such block bonded into it but could have one bonded to it, Figures 7 to 9 show an assembly on a railway track, Figure 10 shows a side view of a block of electrically insulating material, and Figure 11 shows a plan view of the same block. Figures 1 to 9 are copies of the correspondingly numbered figures in British Patent Specification No. 1,510,224 except that Figures 1 and 2 show a modification of the upper side of the "fifth portion" 5 of the clip and a block 40 of electrically insulating material having a flat upper surface which is parallel to and bonded to the flat surface 5A at the lower side of the "fifth portion" 5 of the clip. There is no other metal part, in the structural unit comprising the clip and the block 40, on the lower side of the block 40. The clip according to Figures 4 to 6 may in the same way have a block 40 of electrically insulating material bonded to its flat surface 5A. An assembly according to Figures 7 to 9 may be modified by replacing the illustrated clip by a structural unit comprising a clip and a block as described above and replacing the insulator 24 shown in Figures 7 to 9 by an insulator which insulates the block 33 from the rail but does not extend over any part of the upper surface of the rail flange. The lower side of the block 40 then directly contacts the upper surface of the rail flange. For a more complete description of other parts of Figures 1 to 9, see Specification No. 1,510,224. The block 41 shown in Figures 10 and 11 may be used instead of the block 40. Like the latter, it is broader at one end 42, where the end face of the insulator is flat and perpendicular to the flat and parallel upper and lower faces of the block, than it is at the other end 43 but the width of the end 42 of the block 41 is greater than the width of the corresponding end of the block 40. The blocks 40 and 41 are preferably made by casting suitable material to the desired final shape in a mould. In both cases, the block is about 6 mm thick, although it may be thinner or thicker, for example anywhere within the range 4 to 9 mm, and about 33 mm long, although it may be shorter or longer, for example anywhere within the range 20 to 40 mm. Figure 11 show that a line 44 joining the midpoint of the end 42 of the block 41 to the point at the end 43 which is further from the end 42 is not quite perpendicular to the end 42. The major faces of the block 41 are somewhat in the form of a flat iron. It is the end 42 of the block which is nearer the extreme end B of the clip. The material of the blocks 40 and 41 is preferably a urethane elastomer or a polyether elastomer, and it is bonded to the flat surface on the clip by an adhesive, for example a cyanoacrylate type instant-bond adhesive. It is possible to apply all over the part 5 of the clip and over all or the upper part of the block 40 or 41 a layer of electrically insulating material which extends also a short distance along the part 4 of the clip, the purpose being to create a longer surface leakage path between the clip and the rail flange or the anchorage for the clip in the case where it is upon that which the clip bears through the intermediary of the block. It is also possible to provide recesses, for example grooves, in the flat surface of the clip and/or the flat surface of the block which is bonded to the clip, in order to provide a better key. CLAIMS
1. A structural unit comprising a railway railfastening clip which has been made by bending a metal rod and which has on one side a flat surface to which is bonded a flat surface, parallel to the flat surface of the clip, on a block of electrically insulating material, there being no other metal part in the structural unit on the side of the block further from the flat surface on the block.
2. A structural unit as claimed in claim 1, wherein the clip has been made by bending a steel rod of circular cross-section and forming said flat surface of the clip at a part of the clip which is to bear downwardly on the upper side of a flange at the bottom of a railway rail, so that the clip bears downwardly on the flange through the intermediary of the block.
3. A structural unit as claimed in claim 1, wherein the clip has been made by bending a steel rod of circular cross-section and forming said flat surface of the clip at a part of the clip which is to bear downwardly on a metal anchorage for the clip, so that the clip bears downwardly on said part through the intermediary of the block.
4. A structural unit as claimed in claim 3, wherein, in use of the clip, the clip directly contacts the flange on the rail and is electrically insulated from the anchorage.
5. A structural unit as claimed in claim 1, 2 or 3, wherein the block is broader at one end than at the other, the end face at said one end being flat and perpendicular to the upper and lower faces of the block, which are flat and parallel to one another.
6. A structural unit as claimed in any one of the preceding claims, wherein the block has been made by casting suitable material to the desired final shape in a mould.
7. A structural unit as claimed in any one of the preceding claims, wherein the block is within the range of 4 to 9 mm thick and within the range 20 to 40 mm long.
8. A structural unit as claimed in claim 7, wherein the block is substantially 6 mm thick and 33 mm long.
9. A structural unit as claimed in any one of the preceding claims, wherein the major faces of the block are substantially in the form of a flat-iron.
10. A structural unit as claimed in any one of the preceding claims, wherein said block is made of a urethane elastomer.
11. A structural unit as claimed in any one of claims 1 to 9, wherein said block is made of a polyether elastomer.
12. A structural unit as claimed in any one of the preceding claims, wherein said block is bonded to the flat surface on the clip by an adhesive.
13. A structural unit as claimed in claim 12, wherein said adhesive is a cyanoacrylate type instant-bond adhesive.
14. A structural unit as claimed in any one of the preceding claims, wherein a layer of electrically insulating material is applied all over the part of the clip in the region of its flat surface and over all or the upper part of said block.
1 5. A structural unit, substantially as hereinbefore described with reference to Figures 1 and 2 or Figures 10 and 11 of the accompanying drawings.
GB08202927A 1982-01-29 1982-01-29 Railway rail-fastening clips Expired GB2117035B (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
GB08202927A GB2117035B (en) 1982-01-29 1982-01-29 Railway rail-fastening clips
AU10700/83A AU1070083A (en) 1982-01-29 1983-01-24 Insulating rail clip

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB08202927A GB2117035B (en) 1982-01-29 1982-01-29 Railway rail-fastening clips

Publications (2)

Publication Number Publication Date
GB2117035A true GB2117035A (en) 1983-10-05
GB2117035B GB2117035B (en) 1986-05-08

Family

ID=10528050

Family Applications (1)

Application Number Title Priority Date Filing Date
GB08202927A Expired GB2117035B (en) 1982-01-29 1982-01-29 Railway rail-fastening clips

Country Status (2)

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AU (1) AU1070083A (en)
GB (1) GB2117035B (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2435285A (en) * 2006-02-21 2007-08-22 Pandrol Ltd Fastening railway rails
CN112982036A (en) * 2021-02-20 2021-06-18 中铁隆昌铁路器材有限公司 A fastener device for tram is shock-resistant insulating

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB696418A (en) * 1950-02-14 1953-09-02 Samuel Bottams Improvements relating to means for fixing railway rails
GB957500A (en) * 1959-07-06 1964-05-06 Evan Melfyn Lewis Improvements in or relating to mounting means for rails
GB967694A (en) * 1961-07-13 1964-08-26 Ressorts Du Nord Sa Improvements in elastically yieldable rail fasteners
GB972678A (en) * 1961-01-10 1964-10-14 P C C Improvements in and relating to an elastically yieldable fastener for fastening rails on ties
GB1003756A (en) * 1961-07-13 1965-09-08 Ressorts Du Nord Sa Improved elastically yieldable rail fastener
GB1213762A (en) * 1969-03-19 1970-11-25 Lockspike Ltd A railway rail-fastening member and a railway rail and fastening arrangement including the member
GB1330382A (en) * 1970-06-12 1973-09-19 Lesjofors Ab Spring-loaded rail fastening devices
GB1394796A (en) * 1972-03-28 1975-05-21 Illinois Tool Works Stud anchors
GB1510224A (en) * 1975-11-07 1978-05-10 Pandrol Ltd Railway rail fastening clip and a railway rail-and-fastening assembly employing it

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB696418A (en) * 1950-02-14 1953-09-02 Samuel Bottams Improvements relating to means for fixing railway rails
GB957500A (en) * 1959-07-06 1964-05-06 Evan Melfyn Lewis Improvements in or relating to mounting means for rails
GB972678A (en) * 1961-01-10 1964-10-14 P C C Improvements in and relating to an elastically yieldable fastener for fastening rails on ties
GB967694A (en) * 1961-07-13 1964-08-26 Ressorts Du Nord Sa Improvements in elastically yieldable rail fasteners
GB1003756A (en) * 1961-07-13 1965-09-08 Ressorts Du Nord Sa Improved elastically yieldable rail fastener
GB1213762A (en) * 1969-03-19 1970-11-25 Lockspike Ltd A railway rail-fastening member and a railway rail and fastening arrangement including the member
GB1330382A (en) * 1970-06-12 1973-09-19 Lesjofors Ab Spring-loaded rail fastening devices
GB1394796A (en) * 1972-03-28 1975-05-21 Illinois Tool Works Stud anchors
GB1510224A (en) * 1975-11-07 1978-05-10 Pandrol Ltd Railway rail fastening clip and a railway rail-and-fastening assembly employing it

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2435285A (en) * 2006-02-21 2007-08-22 Pandrol Ltd Fastening railway rails
US7845578B2 (en) 2006-02-21 2010-12-07 Pandrol Limited Railway rail fastening clip
US7954727B2 (en) 2006-02-21 2011-06-07 Pandrol Limited Anchoring devices for rail fastening clips
US8146835B2 (en) 2006-02-21 2012-04-03 Pandrol Limited Sealing plate for railway rail clip anchoring device and sleeper manufacturing method
CN112982036A (en) * 2021-02-20 2021-06-18 中铁隆昌铁路器材有限公司 A fastener device for tram is shock-resistant insulating

Also Published As

Publication number Publication date
GB2117035B (en) 1986-05-08
AU1070083A (en) 1983-08-04

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PCNP Patent ceased through non-payment of renewal fee