IE20040081A1 - Temporary speed restriction track unit - Google Patents
Temporary speed restriction track unitInfo
- Publication number
- IE20040081A1 IE20040081A1 IE20040081A IE20040081A IE20040081A1 IE 20040081 A1 IE20040081 A1 IE 20040081A1 IE 20040081 A IE20040081 A IE 20040081A IE 20040081 A IE20040081 A IE 20040081A IE 20040081 A1 IE20040081 A1 IE 20040081A1
- Authority
- IE
- Ireland
- Prior art keywords
- magnet
- track
- unit
- rail
- fixed portion
- Prior art date
Links
- 239000011152 fibreglass Substances 0.000 claims description 4
- 230000001681 protective effect Effects 0.000 claims description 3
- 230000004907 flux Effects 0.000 description 2
- 230000000007 visual effect Effects 0.000 description 2
- 206010014405 Electrocution Diseases 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B61—RAILWAYS
- B61L—GUIDING RAILWAY TRAFFIC; ENSURING THE SAFETY OF RAILWAY TRAFFIC
- B61L3/00—Devices along the route for controlling devices on the vehicle or train, e.g. to release brake or to operate a warning signal
- B61L3/02—Devices along the route for controlling devices on the vehicle or train, e.g. to release brake or to operate a warning signal at selected places along the route, e.g. intermittent control simultaneous mechanical and electrical control
- B61L3/08—Devices along the route for controlling devices on the vehicle or train, e.g. to release brake or to operate a warning signal at selected places along the route, e.g. intermittent control simultaneous mechanical and electrical control controlling electrically
- B61L3/12—Devices along the route for controlling devices on the vehicle or train, e.g. to release brake or to operate a warning signal at selected places along the route, e.g. intermittent control simultaneous mechanical and electrical control controlling electrically using magnetic or electrostatic induction; using radio waves
- B61L3/121—Devices along the route for controlling devices on the vehicle or train, e.g. to release brake or to operate a warning signal at selected places along the route, e.g. intermittent control simultaneous mechanical and electrical control controlling electrically using magnetic or electrostatic induction; using radio waves using magnetic induction
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B61—RAILWAYS
- B61L—GUIDING RAILWAY TRAFFIC; ENSURING THE SAFETY OF RAILWAY TRAFFIC
- B61L3/00—Devices along the route for controlling devices on the vehicle or train, e.g. to release brake or to operate a warning signal
- B61L3/02—Devices along the route for controlling devices on the vehicle or train, e.g. to release brake or to operate a warning signal at selected places along the route, e.g. intermittent control simultaneous mechanical and electrical control
- B61L3/08—Devices along the route for controlling devices on the vehicle or train, e.g. to release brake or to operate a warning signal at selected places along the route, e.g. intermittent control simultaneous mechanical and electrical control controlling electrically
- B61L3/12—Devices along the route for controlling devices on the vehicle or train, e.g. to release brake or to operate a warning signal at selected places along the route, e.g. intermittent control simultaneous mechanical and electrical control controlling electrically using magnetic or electrostatic induction; using radio waves
- B61L3/126—Constructional details
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01B—PERMANENT WAY; PERMANENT-WAY TOOLS; MACHINES FOR MAKING RAILWAYS OF ALL KINDS
- E01B26/00—Tracks or track components not covered by any one of the preceding groups
- E01B26/005—Means for fixing posts, barriers, fences or the like to rails
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Train Traffic Observation, Control, And Security (AREA)
Abstract
A temporary speed restriction track unit (1) comprises a magnet and a single spring-loaded clamp mechanism so that the track unit (1) is only attached to one rail (8) of the railway line. The clamping mechanism comprises a fixed portion (2) and a movable portion (3). The movable portion (3) is preferably spring loaded and biased towards the fixed portion (2). The unit (1) is attached to the foot of a running rail and is positioned squarely in the middle of the two rails forming the railway track. The unit (1) may be locked in position with a key and/or padlock. The unit (1) comprises a magnet assembly (5) that is arranged to be positioned between the two rails. The magnet assembly (5) may be protected in the direction of travel of the train by rubber blocks (6) on each side of the magnet assembly (5). <Figures 1 (a)&(b)>
Description
TEMPORARY SPEED RESTRICTION TRACK UNIT
The present invention relates to a temporary speed restriction track unit for use on railways.
Conventionally, a train driver is given published route information containing details of speed restrictions. However, sometimes due to urgent maintenance work or due to an incident or accident on the line, it is necessary to set up a temporary speed restriction (TSR) on the track. This is done by placing a magnet on the track between the rails. The magnet interacts with a warning and optionally automatic braking system in the driver's cab. When the train passes over the magnet an audible and/or visual warning may be given to the driver in the cab. An emergency warning board may also be positioned along the track to give the driver advance visual warning.
A known temporary speed restriction track unit comprises a magnet which is positioned centrally between two rails. The temporary speed restriction track unit has two arms and each arm is secured to a rail. The known temporary speed restriction track unit is awkward to attach to the two rails and in order to place the unit the ballast by both rails must be excavated. It can take two engineers several hours to position and secure the known unit. Furthermore, since a power rail is often present, there is a danger of electrocution tog—h ,n t the engineers since the rail adjacent the power rail must be excavated.
According to a first aspect of the present invention there is provided a temporary speed restriction track unit comprising a magnet and a single' clamp for clamping to a rail of a railway line so that the unit is only attached to one rail of the railway line.
The temporary speed restriction track unit
IE 0 4 0 0 8 1
- 2 according to the preferred embodiment represents a significant improvement over the known unit it that it is much quicker, easier and safer to install. By using a single clamp mechanism the unit can be placed quickly on the track without having to excavate both sides of the rail. Such an arrangement allows the temporary speed restriction track unit to be placed within a matter of minutes compared to the known unit which can take several hours to position. The temporary speed restriction track unit according to the preferred embodiment can also be positioned whilst working entirely away from a power rail and without there being any need for an engineer to work in close proximity to the power rail. The preferred unit is therefore significantly safer to install.
Preferably, the unit is arranged to be positioned approximately centrally between two rails. The single clamp may comprise a fixed portion and a movable portion, and the movable portion may be sprung loaded and biased towards the fixed portion. A locking mechanism may be used to lock the clamp to the rail.
The magnet preferably has a magnetic flux density 70 Gauss, 2: 100 Gauss, 2: 150 Gauss, £ 200 Gauss, or >
220 Gauss which is greater than known track magnets.
Preferably the magnet is housed in a protective fibre glass housing and/or one or more rubber blocks may be used to protect the magnet.
According to a second aspect of the present invention, there is provided a railway warning system comprising:
a housing having a body portion housing a magnet and a single arm attached to the body portion at a proximal end and having a spring loaded clamp mechanism at the distal end for attachment to the rail of a railway line.
A locking means may be used to lock or otherwise secure the clamp mechanism to the rail.
According to a third aspect of the present
IE 0 4 00 8 1
- 3 invention, there is provided a method of installing a warning device on to a railway line, comprising:
clamping a temporary speed restriction track unit comprising a magnet and a single clamp to a rail of a railway line.
According to a fourth aspect of the present invention, there is provided a temporary speed restriction track unit wherein the temporary speed restriction track unit is only attached to one rail of a railway line.
According to a fifth aspect of the present invention, there is provided a track magnet having a body portion and a single arm portion for attachment to a single rail of a railway line.
According to a sixth aspect of the present invention, there is provided a track magnet assembly for interacting with a warning system in a train driver's cab, the track magnet assembly having only one clamp means for clamping the track magnet assembly to a rail of a railway line.
Preferably, the clamp means comprises a telescopic arm, further preferably comprising a fixed portion and a movable portion, the movable portion preferably sliding within the fixed portion or on the fixed portion. The movable portion is preferably spring biased.
The temporary speed restriction track unit is preferably locked or secured by a bolt which prevents further movement of a telescopic arm which forms one part of the clamp mechanism.
According to a seventh aspect of the present invention, there is provided a temporary speed restriction track unit for interacting with a warning system in a train, the temporary speed restriction track unit comprising:
a fibre glass housing having a magnet assembly therein;
a single clamp for securing the housing to just one rail and for positioning the magnet assembly in the |£ Q 4 00 8 1 middle of two rails; and means for locking the clamp to the rail.
A particularly preferred feature of the present invention is that the magnet may have a magnetic flux density greater than conventional track magnets which have a standard strength of 60 Gauss. Strengths of 220 Gauss may be used, particularly when the magnets are to be placed on track wherein trains may travel at speeds of 80-100 mph (128-160 km/h).
Various embodiments of the present invention will now be described, by way of example only, and with reference to the accompanying drawings in which:
Fig. 1(a) shows a side view of a temporary speed restriction track unit according to an embodiment of the present invention and Fig. 1(b) shows a plan view of the unit; and
Fig. 2(a) shows a side view of a particularly preferred temporary speed restriction track unit being located in position and Fig. 2(b) shows a side view of the unit having been fixed in position.
A temporary speed restriction track unit 1 according to an embodiment of the present invention is shown in Fig. 1. The temporary speed restriction track unit 1 has a single arm 4 with a clamping mechanism at one end. The clamping mechanism comprises a fixed portion 2 and a movable portion 3. The movable portion 3 is preferably spring loaded and biased towards the fixed portion 2.
The unit 1 is attached to the foot of a running rail and positioned squarely in the middle of the two rails forming the railway track. The unit 1 may be locked in position with a key and/or padlock.
The unit 1 comprises a magnet assembly 5 which is arranged to be positioned in use in between the two rails. The magnet assembly 5 may be protected in the direction of travel of the train by rubber blocks 6 on each side of the magnet assembly 5 as shown in Fig.
1(b) .
ΙΕ π 4 00 8 1
- 5 The unit 1 is approximately 950 mm long x 189 mm high and weighs approximately 25 kg. The movable clamp portion 3 is approximately 100 mm wide.
A particularly preferred embodiment is shown in 5 Fig. 2. According to this embodiment, a magnet assembly is provided within a fibre glass protective housing 8. The housing 8 extends to a clamping mechanism which is preferably either similar to or identical with the clamping mechanism 2,3 shown in Fig. 1. A latch 9 may be used to release and/or extend movable portion 3 so that the clamping mechanism can engage with the underside of a rail 8. Once in place, the track unit 1 may be secured to the rail 8 by the latch 9 and/or a locking bar 10.
As will be readily apparent, the track unit 1 is stronger, easier to install and safer to install than known temporary speed restriction track units.
Although the present invention has been described with reference to preferred embodiments, it will be understood by those skilled in the art that various changes in form and detail may be made without departing from the scope of the invention as set forth in the accompanying claims .
Claims (12)
1. A temporary speed restriction track unit comprising a magnet and a single clamp for clamping to a rail of a railway line so that the unit is only attached to one rail of the railway line wherein said magnet is arranged to be positioned approximately centrally between two rails and wherein said clamp means comprises a telescopic arm, said telescopic arm comprising a fixed portion and a movable portion, said movable portion sliding within said fixed portion or on said fixed portion.
2. A temporary speed restriction track unit as claimed in claim 1, wherein said movable portion is biased towards said fixed portion.
3. A temporary speed restriction track unit as claimed in claim 1 or 2, further comprising a locking mechanism for locking said clamp to said rail.
4. A temporary speed restriction track unit as claimed in any preceding claim, wherein said magnet is housed in a protective fibre glass housing.
5. A temporary speed restriction track unit as claimed in any preceding claim, wherein one or more rubber blocks are used to protect said magnet.
6. A railway warning system comprising: a housing having a body portion housing a magnet and a single arm attached to said body portion at a proximal end and having a spring loaded clamp mechanism at the distal end for attachment to the rail of a railway line wherein said magnet is arranged to be Ί £0 4008 1 positioned approximately centrally between two rails and wherein said clamp mechanism comprises a telescopic arm, said telescopic arm comprising a fixed portion and a movable portion, said movable portion sliding within 5 said fixed portion or on said fixed portion. •
7. A railway warning system as claimed in claim 6, further comprising a locking means for locking or otherwise securing the clamp mechanism to said rail.
8. A track magnet assembly for interacting with a warning system in a train driver's cab, said track magnet assembly having only one clamp means for clamping said track magnet assembly to a rail of a railway line 15 wherein said magnet assembly is arranged to be positioned approximately centrally between two rails and wherein said clamp means comprises a telescopic arm, said telescopic arm comprising a fixed portion and a movable portion, said movable portion sliding within 20 said fixed portion or on said fixed portion.
9. A track magnet assembly as claimed in claim 8, wherein said movable portion is spring biased.
10. A temporary speed restriction track substantially as described herein with reference to the accompanying drawings.
11. A railway warning system substantially as described herein with reference to the accompanying drawings.
12. A track magnet assembly substantially as described herein with reference to the accompanying drawings.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB0115786A GB0115786D0 (en) | 2001-06-28 | 2001-06-28 | Temporary speed restriction track |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| IE20040081A1 true IE20040081A1 (en) | 2004-03-24 |
Family
ID=9917508
Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| IE20020536A IE20020536A1 (en) | 2001-06-28 | 2002-06-28 | Temporary Speed Restriction Track Unit |
| IE20040081A IE20040081A1 (en) | 2001-06-28 | 2002-06-28 | Temporary speed restriction track unit |
Family Applications Before (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| IE20020536A IE20020536A1 (en) | 2001-06-28 | 2002-06-28 | Temporary Speed Restriction Track Unit |
Country Status (2)
| Country | Link |
|---|---|
| GB (2) | GB0115786D0 (en) |
| IE (2) | IE20020536A1 (en) |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2712365B2 (en) * | 1977-03-22 | 1979-03-22 | Pintsch Bamag Antriebs- Und Verkehrstechnik Gmbh, 4220 Dinslaken | Device for attaching sensors to the rail body for monitoring and / or controlling rail traffic |
| AU2548484A (en) * | 1983-10-03 | 1985-04-18 | Servo Corp. Of America | Shock and isolation clamp |
| AT394172B (en) * | 1988-12-14 | 1992-02-10 | Josef Frauscher Fa Ing | DEVICE FOR FASTENING SWITCHING AND MEASURING DEVICES ON THE RAILS OF RAILWAYS |
| SU1615008A1 (en) * | 1988-12-27 | 1990-12-23 | А.Э.Штанке | Arrangement for securing track sensor to rail |
| JP2732807B2 (en) * | 1994-10-27 | 1998-03-30 | 三立工電株式会社 | Detector support device |
-
2001
- 2001-06-28 GB GB0115786A patent/GB0115786D0/en not_active Ceased
-
2002
- 2002-06-28 IE IE20020536A patent/IE20020536A1/en not_active IP Right Cessation
- 2002-06-28 GB GB0215019A patent/GB2379069B/en not_active Expired - Fee Related
- 2002-06-28 IE IE20040081A patent/IE20040081A1/en not_active Application Discontinuation
Also Published As
| Publication number | Publication date |
|---|---|
| IE20020536A1 (en) | 2003-04-30 |
| GB2379069B (en) | 2003-12-17 |
| GB2379069A (en) | 2003-02-26 |
| GB0215019D0 (en) | 2002-08-07 |
| GB0115786D0 (en) | 2001-08-22 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| FJ9A | Application deemed to be withdrawn section 31(3) |