EP0521231A1 - Fishplate for rail joint - Google Patents

Fishplate for rail joint Download PDF

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Publication number
EP0521231A1
EP0521231A1 EP91890126A EP91890126A EP0521231A1 EP 0521231 A1 EP0521231 A1 EP 0521231A1 EP 91890126 A EP91890126 A EP 91890126A EP 91890126 A EP91890126 A EP 91890126A EP 0521231 A1 EP0521231 A1 EP 0521231A1
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EP
European Patent Office
Prior art keywords
lug
rail
strap
strength
end faces
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
EP91890126A
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German (de)
French (fr)
Other versions
EP0521231B1 (en
Inventor
Günther Koblmüller
Michael Dipl.-Ing. Martin
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.)
Pc Wagner Elektrothermit-Schweissgesellschaft
PC Wagner Elektrothermit Schweiss GmbH
Original Assignee
Pc Wagner Elektrothermit-Schweissgesellschaft
PC Wagner Elektrothermit Schweiss GmbH
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 Pc Wagner Elektrothermit-Schweissgesellschaft, PC Wagner Elektrothermit Schweiss GmbH filed Critical Pc Wagner Elektrothermit-Schweissgesellschaft
Priority to EP91890126A priority Critical patent/EP0521231B1/en
Priority to DE59107164T priority patent/DE59107164D1/en
Priority to AT91890126T priority patent/ATE132218T1/en
Publication of EP0521231A1 publication Critical patent/EP0521231A1/en
Application granted granted Critical
Publication of EP0521231B1 publication Critical patent/EP0521231B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • E01B11/00—Rail joints
    • E01B11/54—Electrically-insulating rail joints

Definitions

  • the invention relates to a connecting lug for a rail butt joint, the lug being screwed to the rails, in particular screwed high-strength, and possibly glued, the lug body essentially filling the cavity between the rail head, rail web and rail foot made of high-strength, in particular fiber-reinforced plastic, as a one-piece molded body is and has at least four passage openings for connecting screws, and wherein the tab body is reinforced on its outer side in the installed state by a rib extending from one to the other end face of the tab body, which extends over a substantial part of the tab body height.
  • a connecting lug of the type specified in the introduction which is known from EP-A1-0 229 860, consists of a fiber-reinforced material in which all fibers are unidirectionally aligned parallel to the tensile stress, with other fibers with particularly high tensile strength being inserted in the lower region of the lug.
  • the invention aims to provide a connecting strap made of plastic, which has higher strength and extended uses compared to the known design.
  • the connecting bracket according to the invention is characterized in that the same tensioning elements extend in the bracket body between the two end faces, via which the bracket body can be pretensioned.
  • the tensioning elements extend in the tension zone and in the Pressure zone of the tab body.
  • each tensioning element is formed by a wire made of metal or plastic, which is embedded in the tab body or guided in channels of the tab body and is held in the pretensioned state by anchor plates on the end faces of the tab body.
  • each tensioning element can be formed by a pre-tensioned tension wire embedded in the strap body, which is provided with projections on its outside and cut off on the end faces of the strap body.
  • the connecting straps can advantageously be adapted to the respective application with regard to the stresses to be absorbed, the bending strength of the connecting straps also being able to be increased significantly.
  • the connecting lug shown for the insulating connection of the butt ends of rails S, S ' has a substantially parallelepipedal, designed as a molded body tab body 1 made of plastic, which is provided in the embodiment shown with four through openings 2 for (not shown) connecting screws, which in the middle of the tab body height are formed.
  • the tab body 1 is reinforced on its outer side in the installed state by a rib 3 which extends over the length of the body from face to face. As shown in FIG. 1, the rib 3 is widened in the area of the passage openings 2 and in the middle of the tab over a substantial part of the body height, which is more than 50% of the height.
  • an adhesive layer of up to 2 mm in the web area and approximately 0.2 mm in the head and foot area is applied to the flap body on the side facing the flap chamber, and the flap is then screwed to the rails with high strength.
  • a fast-curing adhesive in particular methacrylate adhesive, is expediently used as the adhesive.
  • High-strength plastic which is reinforced in particular with glass fibers, is used as the material for forming the tab body 1, unsaturated polyester being particularly suitable.
  • tensioning elements 4 extend in the longitudinal direction of the flap body 1, which extend outside the through openings 2 from one end face of the flap body to the other, etc. in the tension and compression zones of the tab.
  • each tensioning element is designed as a smooth tensioning wire 4 made of metal or plastic, which is embedded directly in the pre-tensioned state when the tab body is cast.
  • the smooth tension wires 4 are cut off on the end faces of the tab body 1.
  • the smooth tensioning wires 4 can also be guided in channels of the bracket body 1 and, after the prestressing, can be held on the end faces by anchor plates (not shown).
  • the tensioning wires can be provided on their outside with ribs or other projections which ensure that the prestressed wires are anchored in the plastic within the scope of the adhesive length. These tension wires are also cut off at the end faces of the tab body after the shaping.
  • the tension wires can also be designed so that they are provided at predetermined longitudinal intervals with welded small disks that secure anchoring in the plastic. If plastic tension wires are used, they can be reinforced by embedded fiber material, such as carbon fibers, etc.

Abstract

Fishplate for a rail joint, the plate being screwed and if necessary bonded to the rails, the plate body (1), which essentially fills the cavity between rail head, rail stem and rail foot, being designed of high-strength plastic as a one-piece shaped body and having at least four passage openings for connecting screws, and the plate body being reinforced on its side which is on the outside in the installed state by a rib (3) extending from one end side to the other of the plate body, and tensioning elements (4), via which the plate body can be pretensioned, extending in the plate body between the two end sides of the same. <IMAGE>

Description

Die Erfindung betrifft eine Verbindungslasche für eine Schienenstoßverbindung, wobei die Lasche mit den Schienen verschraubt, insbesondere hochfest verschraubt, und gegebenenfalls verklebt wird, wobei der den Hohlraum zwischen Schienenkopf, Schienensteg und Schienenfuß im wesentlichen ausfüllende Laschenkörper aus hochfestem, insbesondere faserverstärktem Kunststoff als einstückiger Formkörper ausgebildet ist und zumindest vier Durchtrittsöffnungen für Verbindungsschrauben aufweist, und wobei der Laschenkörper an seiner im Einbauzustand äußeren Seite durch eine sich von einer zur anderen Stirnseite des Laschenkörpers erstreckende Rippe verstärkt ist, die sich über einen wesentlichen Teil der Laschenkörperhöhe erstreckt.The invention relates to a connecting lug for a rail butt joint, the lug being screwed to the rails, in particular screwed high-strength, and possibly glued, the lug body essentially filling the cavity between the rail head, rail web and rail foot made of high-strength, in particular fiber-reinforced plastic, as a one-piece molded body is and has at least four passage openings for connecting screws, and wherein the tab body is reinforced on its outer side in the installed state by a rib extending from one to the other end face of the tab body, which extends over a substantial part of the tab body height.

Verbindungslaschen dieser Art haben gegenüber herkömmlichen Stahllaschen den Vorteil, daß zur Ausbildung von elektrisch isolierenden Schienenstößen keine spezielle Isolierung zwischen der Lasche und den Schienen vorgesehen werden muß und die Handhabung sowie der Transport der Lachen erleichtert wird. Außerdem ist die Herstellung der Kunststofflaschen weniger aufwendig als jene der Stahllaschen. Eine aus der EP-A1-0 229 860 bekannte Verbindungslasche der einleitend angegebenen Art besteht aus einem faserverstärkten Werkstoff, bei dem alle Fasern unidirektional parallel zur Zugbeanspruchung ausgerichtet sind, wobei im unteren Bereich der Lasche andere Fasern mit besonders hoher Zugfestigkeit eingelegt sind.Connecting tabs of this type have the advantage over conventional steel tabs that no special insulation between the tab and the rails has to be provided for the formation of electrically insulating rail joints and the handling and transport of the pools is facilitated. In addition, the production of plastic bottles is less complex than that of steel plates. A connecting lug of the type specified in the introduction, which is known from EP-A1-0 229 860, consists of a fiber-reinforced material in which all fibers are unidirectionally aligned parallel to the tensile stress, with other fibers with particularly high tensile strength being inserted in the lower region of the lug.

Die Erfindung zielt darauf ab, eine Verbindungslasche aus Kunststoff zu schaffen, die gegenüber der bekannten Ausführung höhere Beanspruchbarkeit und erweiterte Einsatzmöglichkeiten aufweist. Die erfindungsgemäße Verbindungslasche zeichnet sich dadurch aus, daß sich im Laschenkörper zwischen den beiden Stirnseiten desselben Spannelemente erstrecken, über welche der Laschenkörper vorspannbar ist.The invention aims to provide a connecting strap made of plastic, which has higher strength and extended uses compared to the known design. The connecting bracket according to the invention is characterized in that the same tensioning elements extend in the bracket body between the two end faces, via which the bracket body can be pretensioned.

Gemäß einer bevorzugten Ausführungsform der Erfindung erstrecken sich die Spannelemente in der Zugzone und in der Druckzone des Laschenkörpers.According to a preferred embodiment of the invention, the tensioning elements extend in the tension zone and in the Pressure zone of the tab body.

Nach einem weiteren Erfindungsmerkmal ist jedes Spannelement durch einen Draht aus Metall oder Kunststoff gebildet, der in den Laschenkörper eingebettet oder in Kanälen des Laschenkörpers geführt und an den Stirnseiten des Laschenkörpers durch Ankerplatten im Vorspannungszustand gehalten ist.According to a further feature of the invention, each tensioning element is formed by a wire made of metal or plastic, which is embedded in the tab body or guided in channels of the tab body and is held in the pretensioned state by anchor plates on the end faces of the tab body.

Alternativ kann jedes Spannelement durch einen in den Laschenkörper eingebetteten vorgespannten Spanndraht gebildet sein, der an seiner Außenseite mit Vorsprüngen versehen und an den Stirnseiten des Laschenkörpers abgeschnitten ist.Alternatively, each tensioning element can be formed by a pre-tensioned tension wire embedded in the strap body, which is provided with projections on its outside and cut off on the end faces of the strap body.

Mit der Erfindung kann vorteilhaft eine Anpassung der Verbindungslaschen an den jeweiligen Einsatzfall hinsichtlich der aufzunehmenden Beanspruchungen vorgenommen werden, wobei überdies die Biegefestigkeit der Verbindungslaschen wesentlich erhöht werden kann.With the invention, the connecting straps can advantageously be adapted to the respective application with regard to the stresses to be absorbed, the bending strength of the connecting straps also being able to be increased significantly.

Mit der erfindungsgemäßen Verbindungslasche lassen sich folgende Isolierstoßvarianten herstellen:

  • ein verschraubter Isolierstoß, dessen Festigkeit durch die Pressung der Verbindungslasche an der Schienenkopfunterseite und Schienenfußoberseite erreicht wird,
  • ein hochfest verschraubter Isolierstoß, bei dem eine Pressung der Verbindungslasche durch ein hohes Anzugsmoment der Verbindungsschrauben erreicht wird, und
  • ein verklebter und hochfest verschraubter Isolierstoß, bei dem die Verbindungslasche mittels eines schnell aushärtenden Klebers, insbesondere Metacrylatklebers, in die Laschenkammer der Schienen eingeklebt und zusätzlich mit den Schienen hochfest verschraubt wird.
The following insulating joint variants can be produced with the connecting strap according to the invention:
  • a screwed insulation joint, the strength of which is achieved by pressing the connecting strap on the underside of the rail head and the top of the rail foot,
  • a high-strength screwed insulation joint, in which a pressure of the connecting strap is achieved by a high tightening torque of the connecting screws, and
  • a glued and high-strength screwed insulating joint, in which the connecting strap is glued into the bracket chamber of the rails by means of a fast-curing adhesive, in particular methacrylate adhesive, and is additionally screwed to the rails with high strength.

Mit der erfindungsgemäßen Konstruktion ergibt sich außerdem der Vorteil, daß durch einfache Gestaltung der Kunststofform alle für die Praxis erforderlichen Laschenformen hergestellt werden können und mit ein und demselben Laschenmaterial verschiedene Stoßausführungen erzeugt werden können.With the construction according to the invention there is also the advantage that, by simply designing the plastic mold, all tab shapes required for practical use can be produced and different butt designs can be produced with one and the same tab material.

Weitere Merkmale und Vorteile der Erfindung werden nachfolgend an einem Ausführungsbeispiel unter Bezugnahme auf die Zeichnung näher erläutert. Es zeigen:

  • Fig. 1 eine Ansicht einer Verbindungslasche für einen Schienenstoß,
  • Fig. 2 einen Schnitt durch die Lasche nach der Linie II-II in Fig. 1,
  • Fig. 3 einen Schnitt nach der Linie III-III in Fig. 2, und
  • Fig. 4 einen Schnitt nach der Linie IV-IV in Fig. 2.
Other features and advantages of the invention will be explained in more detail below using an exemplary embodiment with reference to the drawing. Show it:
  • 1 is a view of a connecting bracket for a rail joint,
  • 2 shows a section through the tab along the line II-II in FIG. 1,
  • Fig. 3 is a section along the line III-III in Fig. 2, and
  • 4 shows a section along the line IV-IV in FIG. 2nd

Die dargestellte Verbindungslasche für die isolierende Verbindung der Stoßenden von Schienen S, S' weist einen im wesentlichen parallelepipedischen, als Formkörper ausgebildeten Laschenkörper 1 aus Kunststoff auf, der bei der dargestellten Ausführung mit vier Durchtrittsöffnungen 2 für (nicht gezeigte) Verbindungsschrauben versehen ist, die in der Mitte der Laschenkörperhöhe ausgebildet sind. Der Laschenkörper 1 ist auf seiner im Einbauzustand außen liegenden Seite durch eine Rippe 3 verstärkt, die sich über die Körperlänge von Stirnseite zu Stirnseite erstreckt. Wie Fig. 1 zeigt, ist die Rippe 3 im Bereich der Durchtrittsöffnungen 2 und in der Laschenmitte über einen wesentlichen Teil der Körperhöhe, der mehr als 50 % der Höhe beträgt, verbreitert.The connecting lug shown for the insulating connection of the butt ends of rails S, S 'has a substantially parallelepipedal, designed as a molded body tab body 1 made of plastic, which is provided in the embodiment shown with four through openings 2 for (not shown) connecting screws, which in the middle of the tab body height are formed. The tab body 1 is reinforced on its outer side in the installed state by a rib 3 which extends over the length of the body from face to face. As shown in FIG. 1, the rib 3 is widened in the area of the passage openings 2 and in the middle of the tab over a substantial part of the body height, which is more than 50% of the height.

Wird die Verbindungslasche bei einem Klebestoß verwendet, so wird auf den Laschenkörper auf dessen der Laschenkammer zugekehrten Seite eine Klebstoffschicht von bis zu 2 mm im Stegbereich und etwa 0,2 mm im Kopf- und Fußbereich aufgebracht und die Lasche sodann mit den Schienen hochfest verschraubt. Als Kleber wird zweckmäßig ein schnellaushärtender Kleber, insbesondere Metacrylatkleber, verwendet.If the connecting flap is used for an adhesive joint, an adhesive layer of up to 2 mm in the web area and approximately 0.2 mm in the head and foot area is applied to the flap body on the side facing the flap chamber, and the flap is then screwed to the rails with high strength. A fast-curing adhesive, in particular methacrylate adhesive, is expediently used as the adhesive.

Im Rahmen der Erfindung reicht es anderseits bei einfacher Verschraubung und auch bei hochfester Verschraubung aus, wenn die Verbindungslasche schienenseitig nur im Bereich der Oberseite des Schienenfußes und der Unterseite des Schienenkopfes mit der Schiene in Eingriff kommt, so daß die Druckkräfte nur über diese Laschenzonen übertragen werden, wie dies in den Fig. 3 und 4 dargestellt ist.In the context of the invention, on the other hand, with simple screwing and also with high-strength screwing, it is sufficient if the connecting plate on the rail side only engages with the rail in the area of the top of the rail foot and the underside of the rail head, so that the compressive forces are transmitted only via these plate zones , as shown in Figs. 3 and 4.

Als Material zur Formung des Laschenkörpers 1 wird hochfester Kunststoff verwendet, der insbesondere mit Glasfasern verstärkt ist, wobei sich ungesättigter Polyester besonders gut eignet.High-strength plastic, which is reinforced in particular with glass fibers, is used as the material for forming the tab body 1, unsaturated polyester being particularly suitable.

Um die Zugfestigkeit der Kunststofflasche zu erhöhen, erstrecken sich in Längsrichtung des Laschenkörpers 1 Spannelemente 4, die außerhalb der Durchtrittsöffnungen 2 von einer Stirnseite des Laschenkörpers zur anderen verlaufen, u.zw. in den Zug- und Druckzonen der Lasche.In order to increase the tensile strength of the plastic flap, tensioning elements 4 extend in the longitudinal direction of the flap body 1, which extend outside the through openings 2 from one end face of the flap body to the other, etc. in the tension and compression zones of the tab.

Gemäß den Fig. 3 und 4 ist jedes Spannelement als glatter Spanndraht 4 aus Metall oder Kunststoff ausgebildet, der bei der Gießformung des Laschenkörpers im vorgespannten Zustand direkt in diesen eingebettet wird. An den Stirnseiten des Laschenkörpers 1 werden die glatten Spanndrähte 4 abgeschnitten. Die glatten Spanndrähte 4 können auch in Kanälen des Laschenkörpers 1 geführt und nach dem Vorspannen durch (nicht gezeigte) Ankerplatten an den Stirnseiten gehalten werden.3 and 4, each tensioning element is designed as a smooth tensioning wire 4 made of metal or plastic, which is embedded directly in the pre-tensioned state when the tab body is cast. The smooth tension wires 4 are cut off on the end faces of the tab body 1. The smooth tensioning wires 4 can also be guided in channels of the bracket body 1 and, after the prestressing, can be held on the end faces by anchor plates (not shown).

Die Spanndrähte können anderseits an ihrer Außenseite mit Rippen oder anderen Vorsprüngen versehen sein, die eine Verankerung der vorgespannten Drähte im Rahmen der Haftlänge im Kunststoff gewährleisten. Auch diese Spanndrähte werden nach der Formung an den Stirnseiten des Laschenkörpers abgeschnitten.On the other hand, the tensioning wires can be provided on their outside with ribs or other projections which ensure that the prestressed wires are anchored in the plastic within the scope of the adhesive length. These tension wires are also cut off at the end faces of the tab body after the shaping.

Die Spanndrähte können ferner so ausgebildet sein, daß sie in vorbestimmten Längsabständen mit angeschweißten kleinen Scheiben versehen sind, die eine Verankerung im Kunststoff sichern. Im Falle der Verwendung von Spanndrähten aus Kunststoff können diese durch eingebettetes Fasermaterial, wie Kohlefasern usw., verstärkt sein.The tension wires can also be designed so that they are provided at predetermined longitudinal intervals with welded small disks that secure anchoring in the plastic. If plastic tension wires are used, they can be reinforced by embedded fiber material, such as carbon fibers, etc.

Um der Verbindungslasche hohe Festigkeit zu verleihen, wird sie zweckmäßig mittels der Spannelemente auf die maximal zulässige Druckfestigkeit vorgespannt.In order to give the connecting strap high strength, it is expediently pretensioned to the maximum permissible compressive strength by means of the tensioning elements.

Claims (4)

Verbindungslasche für eine Schienenstoßverbindung, wobei die Lasche mit den Schienen verschraubt, insbesondere hochfest verschraubt, und gegebenenfalls verklebt wird, wobei der den Hohlraum zwischen Schienenkopf, Schienensteg und Schienenfuß im wesentlichen ausfüllende Laschenkörper aus hochfestem, insbesondere faserverstärktem Kunststoff als einstückiger Formkörper ausgebildet ist und zumindest vier Durchtrittsöffnungen für Verbindungsschrauben aufweist, und wobei der Laschenkörper an seiner im Einbauzustand äußeren Seite durch eine sich von einer zur anderen Stirnseite des Laschenkörpers erstreckende Rippe verstärkt ist, die sich über einen wesentlichen Teil der Laschenkörperhöhe erstreckt, dadurch gekennzeichnet, daß sich im Laschenkörper (1) zwischen den beiden Stirnseiten desselben Spannelemente (4) erstrecken, über welche der Laschenkörper vorspannbar ist.Connecting lug for a rail butt joint, the lug being screwed to the rails, in particular screwed high-strength, and possibly glued, the lug body essentially filling the cavity between the rail head, rail web and rail base being made of high-strength, in particular fiber-reinforced plastic, as a one-piece molded body and at least four Has passage openings for connecting screws, and wherein the bracket body on its outer side in the installed state is reinforced by a rib extending from one to the other end face of the bracket body, which extends over a substantial part of the bracket body height, characterized in that in the bracket body (1) extend between the two end faces of the same clamping elements (4), via which the tab body can be pretensioned. Verbindungslasche nach Anspruch 1, dadurch gekennzeichnet, daß sich die Spannelemente (4) in der Zugzone und in der Druckzone des Laschenkörpers (1) erstrecken.Connecting strap according to claim 1, characterized in that the tensioning elements (4) extend in the tension zone and in the pressure zone of the strap body (1). Verbindungslasche nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß jedes Spannelemente durch einen Draht (4) aus Metall oder Kunststoff gebildet ist, der in den Laschenkörper (1) eingebettet oder in Kanälen des Laschenkörpers geführt und an den Stirnseiten des Laschenkörpers durch Ankerplatten im Vorspannungszustand gehalten ist.Connecting lug according to claim 1 or 2, characterized in that each tensioning element is formed by a wire (4) made of metal or plastic, which is embedded in the lug body (1) or guided in channels of the lug body and on the end faces of the lug body by anchor plates in the prestressed state is held. Verbindungslasche nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß jedes Spannelement durch einen in den Laschenkörper (1) eingebetteten vorgespannten Spanndraht gebildet ist, der an seiner Außenseite mit Vorsprüngen versehen und an den Stirnseiten des Laschenkörpers abgeschnitten ist.Connecting strap according to claim 1 or 2, characterized in that each tensioning element is formed by a pre-tensioned tension wire embedded in the strap body (1), which is provided on the outside with projections and is cut off on the end faces of the strap body.
EP91890126A 1991-06-19 1991-06-19 Fishplate for rail joint Expired - Lifetime EP0521231B1 (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
EP91890126A EP0521231B1 (en) 1991-06-19 1991-06-19 Fishplate for rail joint
DE59107164T DE59107164D1 (en) 1991-06-19 1991-06-19 Connection bracket for a rail butt joint
AT91890126T ATE132218T1 (en) 1991-06-19 1991-06-19 CONNECTING TAB FOR A RAIL JOINT CONNECTION

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP91890126A EP0521231B1 (en) 1991-06-19 1991-06-19 Fishplate for rail joint

Publications (2)

Publication Number Publication Date
EP0521231A1 true EP0521231A1 (en) 1993-01-07
EP0521231B1 EP0521231B1 (en) 1995-12-27

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP91890126A Expired - Lifetime EP0521231B1 (en) 1991-06-19 1991-06-19 Fishplate for rail joint

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EP (1) EP0521231B1 (en)
AT (1) ATE132218T1 (en)
DE (1) DE59107164D1 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106042987B (en) * 2016-08-03 2018-09-14 中铁电气化局集团有限公司 A kind of guide rod type expansion joint for conductive rail

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB796058A (en) * 1955-02-17 1958-06-04 John Edmond Irvine Improvements in or relating to railway fishplates
GB889978A (en) * 1958-12-31 1962-02-21 Permali Ltd Improvements in insulating fish plates

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB796058A (en) * 1955-02-17 1958-06-04 John Edmond Irvine Improvements in or relating to railway fishplates
GB889978A (en) * 1958-12-31 1962-02-21 Permali Ltd Improvements in insulating fish plates

Also Published As

Publication number Publication date
EP0521231B1 (en) 1995-12-27
ATE132218T1 (en) 1996-01-15
DE59107164D1 (en) 1996-02-08

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