GB2202563A - Railway switch slide baseplates - Google Patents

Railway switch slide baseplates Download PDF

Info

Publication number
GB2202563A
GB2202563A GB08706591A GB8706591A GB2202563A GB 2202563 A GB2202563 A GB 2202563A GB 08706591 A GB08706591 A GB 08706591A GB 8706591 A GB8706591 A GB 8706591A GB 2202563 A GB2202563 A GB 2202563A
Authority
GB
United Kingdom
Prior art keywords
pad
base member
baseplate
slide
switch blade
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
GB08706591A
Other versions
GB2202563B (en
GB8706591D0 (en
Inventor
John Chambers
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.)
British Railways Board
Original Assignee
British Railways Board
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 British Railways Board filed Critical British Railways Board
Priority to GB8706591A priority Critical patent/GB2202563B/en
Publication of GB8706591D0 publication Critical patent/GB8706591D0/en
Publication of GB2202563A publication Critical patent/GB2202563A/en
Application granted granted Critical
Publication of GB2202563B publication Critical patent/GB2202563B/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • E—FIXED CONSTRUCTIONS
    • E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01B—PERMANENT WAY; PERMANENT-WAY TOOLS; MACHINES FOR MAKING RAILWAYS OF ALL KINDS
    • E01B7/00—Switches; Crossings
    • E01B7/02—Tongues; Associated constructions
    • E—FIXED CONSTRUCTIONS
    • E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01B—PERMANENT WAY; PERMANENT-WAY TOOLS; MACHINES FOR MAKING RAILWAYS OF ALL KINDS
    • E01B2202/00—Characteristics of moving parts of rail systems, e.g. switches, special frogs, tongues
    • E01B2202/04—Nature of the support or bearing
    • E01B2202/042—Sliding
    • E—FIXED CONSTRUCTIONS
    • E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01B—PERMANENT WAY; PERMANENT-WAY TOOLS; MACHINES FOR MAKING RAILWAYS OF ALL KINDS
    • E01B2202/00—Characteristics of moving parts of rail systems, e.g. switches, special frogs, tongues
    • E01B2202/04—Nature of the support or bearing
    • E01B2202/06—Use of friction-reducing surfaces

Landscapes

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

Abstract

A railway switch slide baseplate comprises a cast iron base member (1) with a flat plastics bearing pad (2) secured by a single bolt (6) to the base member and located by a nose (4) engaging a corresponding recess (5) in the base member. The pad can be removed without disturbing either the base member, the stock rail or the switch blade, by removing two of the baseplate anchor bolts and the pad bolt (6) and sliding the pad rearwardly (12) clear of the switch blade. <IMAGE>

Description

Railway Switch Slide Baseplates This invention relates to switch slide baseplates for railway track. Such baseplates are used to fixedly support - the stock rail at a switch and to slidably support a switch blade so that the blade can be moved between its two positions.
In the past the baseplates have been made as iron castings and in order to ensure reliability it has been necessary at regular intervals to lubricate manually the top bearing surface for the switch blade.
More recently the bearing surface has been provided by a self-lubricating plastics pad which is located in a pocket cast into the top surface of the baseplate. The problem which has arisen with the use of such a bearing arrangement is that either the slide baseplate or the rails have to be removed in order to replace the plastic bearing pad. The object of the present invention is to overcome this problem.
According to the invention a switch slide baseplate has a bearing surface provided by a plastics pad which is supported on the baseplate, the plastics pad having a nose at one end which interfits with a recess formed in the top baseplate to restrain lateral movement of the pad and from which the nose is withdrawable by sliding the pad rearwardly over the surface of the baseplate and the pad is also secured at its other end to the baseplate by a removable bolt, whereby when the bolt is removed the plastics pad can be slid from beneath a switch blade supported on the baseplate and off the baseplate.
One slide baseplate in accordance with the invention will now be described by way of example with reference to the accompanying drawing which shows an exploded perspective view of the baseplate.
The baseplate comprises iron casting 1 and dry self-lubricating plastic bearing pad 2 which locates as partly shown by chain-dotted lines 3 on to the casting 1 with its nose 4 locating in the complementarily shaped recess 5 in the casting 1 to provide a bearing surface for the switch blade (not shown). The pad 2 is secured to the casting 1 by coach bolt 6.
The stock rail whose location is diagramatically represented by chain dotted lines 7, is supported against shoulder 8 of upstand 9 forming part of the casting 1.
As can be seen from the drawing, the pad 2 is constrained against lateral movement by screw 6 and the interfitting of its nose 4 with recess 5. Hence removal of the pad 2 is readily brought about by the removal of the single bolt 6 and the two adjacent baseplate holding down screws (not shown) which fit through holes 11 into the underlying sleeper. The pad 2 can then be slid out rearwardly (i.e. in the direction of arrow 12) from beneath the stock rail and switch blade and replaced by a new bearing pad 2 which is slid forwardly under the switch blade and stock rail and then fastened in position by bolt 6. The screws are then replaced in holes 11.

Claims (6)

1. A slide baseplate for a railway switch, comprising a base member and a low-friction bearing pad having an upwardly facing bearing surface for the switch blade to slide on, the pad being supported on the base member and secured to it in such a way that it can be removed from the base member by sliding it over the latter until free of the in-situ switch blade.
2. A baseplate according to Claim 1 wherein the pad is of plastics.
3. A baseplate according to Claim 1 or Claim 2 wherein the base member has a recess into which one end of the pad fits so as to locate the pad against lateral movement on the base member.
4. A baseplate according to Claim 3, wherein the pad has a nose at one end to fit in the said recess, and means towards it other end, clear of the sweep of the switch blade, for removably securing the pad to the base member.
5. A baseplate according to Claim 4 wherein the removable securing means comprise a single bolt.
6. A slide baseplate for a railway switch, substantially as described with reference to the accompanying drawing.
GB8706591A 1987-03-19 1987-03-19 A railway switch Expired - Fee Related GB2202563B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB8706591A GB2202563B (en) 1987-03-19 1987-03-19 A railway switch

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB8706591A GB2202563B (en) 1987-03-19 1987-03-19 A railway switch

Publications (3)

Publication Number Publication Date
GB8706591D0 GB8706591D0 (en) 1987-04-23
GB2202563A true GB2202563A (en) 1988-09-28
GB2202563B GB2202563B (en) 1991-08-21

Family

ID=10614274

Family Applications (1)

Application Number Title Priority Date Filing Date
GB8706591A Expired - Fee Related GB2202563B (en) 1987-03-19 1987-03-19 A railway switch

Country Status (1)

Country Link
GB (1) GB2202563B (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5125603A (en) * 1989-06-02 1992-06-30 Voest-Alpine Zeltweg Gesellschaft M.B.H. Sliding chair, sliding plate and ribbed plate, respectively, for railway switches or railway crossings
US5127613A (en) * 1989-02-10 1992-07-07 Magna Holding Anstalt Rail switching device including an antifriction insert
DE19613996A1 (en) * 1996-04-10 1997-10-16 Butzbacher Weichenbau Gmbh Modified sliding arrangement for railway points

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0011285A1 (en) * 1978-11-18 1980-05-28 Wilfried Ensinger Plastic sliding cover for railway switches
EP0232726A2 (en) * 1986-01-14 1987-08-19 Magna Holding Anstalt Slide plate for railway points

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2340403A1 (en) * 1976-02-09 1977-09-02 Faigle Heinz TRACK EQUIPMENT FOR RAIL VEHICLES
LU75283A1 (en) * 1976-07-01 1978-02-08

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0011285A1 (en) * 1978-11-18 1980-05-28 Wilfried Ensinger Plastic sliding cover for railway switches
EP0232726A2 (en) * 1986-01-14 1987-08-19 Magna Holding Anstalt Slide plate for railway points

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5127613A (en) * 1989-02-10 1992-07-07 Magna Holding Anstalt Rail switching device including an antifriction insert
US5125603A (en) * 1989-06-02 1992-06-30 Voest-Alpine Zeltweg Gesellschaft M.B.H. Sliding chair, sliding plate and ribbed plate, respectively, for railway switches or railway crossings
DE19613996A1 (en) * 1996-04-10 1997-10-16 Butzbacher Weichenbau Gmbh Modified sliding arrangement for railway points
DE19613996C2 (en) * 1996-04-10 2002-06-27 Butzbacher Weichenbau Gmbh Support for an adjustable rail section

Also Published As

Publication number Publication date
GB2202563B (en) 1991-08-21
GB8706591D0 (en) 1987-04-23

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Legal Events

Date Code Title Description
732E Amendments to the register in respect of changes of name or changes affecting rights (sect. 32/1977)
732E Amendments to the register in respect of changes of name or changes affecting rights (sect. 32/1977)
PCNP Patent ceased through non-payment of renewal fee

Effective date: 19980319