GB2390721A - A clamping device having a telescopic arm for attaching equipment to a single rail in a railway - Google Patents
A clamping device having a telescopic arm for attaching equipment to a single rail in a railway Download PDFInfo
- Publication number
- GB2390721A GB2390721A GB0319942A GB0319942A GB2390721A GB 2390721 A GB2390721 A GB 2390721A GB 0319942 A GB0319942 A GB 0319942A GB 0319942 A GB0319942 A GB 0319942A GB 2390721 A GB2390721 A GB 2390721A
- Authority
- GB
- United Kingdom
- Prior art keywords
- rail
- magnet
- speed restriction
- temporary speed
- clamp
- 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
Links
- 239000011152 fibreglass Substances 0.000 claims abstract description 8
- 230000001681 protective effect Effects 0.000 claims description 5
- 230000004907 flux Effects 0.000 claims description 4
- 238000000034 method Methods 0.000 claims description 2
- 230000011664 signaling Effects 0.000 abstract 1
- 230000000007 visual effect Effects 0.000 description 2
- 206010014405 Electrocution Diseases 0.000 description 1
- 238000012423 maintenance 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 device for clamping a device or signalling equipment having a magnet to a rail in a railway comprises a single clamp having a telescopic arm. In use a fixed portion 4 carries the equipment and interfaces with a movable portion 3. The clamp device is located beneath the rail, with the rail being gripped between the pawls 2 and 3. The distal end pawl 3 may be spring loaded and biased to the closed or clamped position. The clamp may be provided with a locking mechanism 10, which holds the clamp shut around the rail. The equipment may be a speed restriction device or a track magnet and may be housed in a fibre glass housing or protected by rubber pads facing the oncoming traffic. In one embodiment the device may be used as part of a temporary speed restriction track unit. In a further embodiment it may be part of a warning system.
Description
TEMPORARY SPEED RESTRICTION TRACK UNIT
5 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 10 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 15 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.
20 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 25 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 to 30 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 35 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
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 5 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 10 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 15 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 20 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, > 150 Gauss, > 200 Gauss, or > 220 Gauss which is greater than known track magnets.
25 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 30 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 35 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
- 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 5 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 10 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.
15 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 20 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 25 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.
30 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: 35 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
- 4 - 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 5 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).
10 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. l(a) shows a side view of a temporary speed restriction track unit according to an embodiment of the 15 present invention and Fig. l(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 20 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 25 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 30 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 35 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. l(b).
- 5 The unit 1 is approximately 950 mm long x 189 mm high and weighs approximately 2S kg. The movable clamp portion 3 is approximately lQ0 mm wide.
A particularly preferred embodiment is shown in 5 Fig. 2. According to this embodiment, a magnet assembly 7 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 10 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.
15 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 20 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 (1)
- - 6 Claims5 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 10 rails and wherein said clamp means comprises a telescopic arm.2. A temporary speed restriction track unit as claimed in claim 1, wherein said single clamp comprises a fixed 15 portion and a movable portion.3. A temporary speed restriction track unit as claimed in claim 2, wherein said movable portion is biased towards said fixed portion.4. A temporary speed restriction track unit as claimed in claim 1, 2 or 3, further comprising a locking mechanism for locking said clamp to said rail.25 5. A temporary speed restriction track unit as claimed in any preceding claim, wherein said magnet is housed in a protective fibre glass housing.6. A temporary speed restriction track unit as claimed 30 in any preceding claim, wherein one or more rubber blocks are used to protect said magnet.7. A railway warning system comprising: a housing having a body portion housing a magnet 35 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 positioned approximately centrally between two rails and wherein said clamp mechanism comprises a telescopic arm.5 8. A railway warning system as claimed in claim 7, further comprising a locking means for locking or otherwise securing the clamp mechanism to said rail.9. A track magnet assembly for interacting with a 10 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 wherein said magnet assembly is arranged to be positioned approximately centrally between two rails and 15 wherein said clamp means comprises a telescopic arm.10. A track magnet assembly as claimed in claim 9, wherein said telescopic arm comprises a fixed portion and a movable portion, said movable portion sliding 20 within said fixed portion or on said fixed portion.11. A track magnet assembly as claimed in claim 10, wherein said movable portion is spring biased.- - Arms 5 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.10 2. A temporary speed restriction track unit as claimed in claim 1, wherein said magnet is arranged to be positioned approximately centrally between two rails.3. A temporary speed restriction track unit as claimed 15 in claim 1 or 2, wherein said single clamp comprises a fixed portion and a movable portion.4. A temporary speed restriction track unit as claimed in claim 3, wherein said movable portion is sprung 20 loaded.5. A temporary speed restriction track unit as claimed in claim 4, wherein said movable portion is biased towards said fixed portion.6. A temporary speed restriction track unit as claimed in any preceding claim, further comprising a locking mechanism for locking said clamp to said rail.30 7. A temporary speed restriction track unit as claimed in any preceding claim, wherein said magnet has a magnetic flux density selected from the group consisting of: (i) 2 70 Gauss; (ii) 2 100 Gauss; (iii) 2 150 Gauss; (iv) 2 200 Gauss; and (v) 2 220 Gauss.8. A temporary speed restriction track unit as claimed in any preceding claim, wherein said magnet is housed in a protective fibre glass housing.9. A temporary speed restriction track unit as claimed in any preceding claim, wherein one or more rubber blocks are used to protect said magnet.5 10. 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 10 railway line.11. A railway warning system as claimed in claim 10, further comprising a locking means for locking or otherwise securing the clamp mechanism to said rail.12. A railway warning system as claimed in claim 10 or 11, wherein said magnet has a magnetic flux density > 200 Gauss.20 13. A method of installing a warning device on to a railway line, comprising: clamping a temporary speed restriction track unit as claimed in any of claims 1-9 to a rail of a railway line. 14. A temporary speed restriction track unit wherein said temporary speed restriction track unit is only attached to one rail of a railway line.30 15. A track magnet having a body portion and a single arm portion for attachment to a single rail of a railway line. 16. A track magnet assembly for interacting with a 35 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.- Is -17. A track magnet assembly as claimed in claim 16, wherein said clamp means comprises a telescopic arm.18. A track magnet assembly as claimed in claim 17, 5 wherein said telescopic arm comprises a fixed portion and a movable portion, said movable portion sliding g within said fixed portion or on said fixed portion.19. A track magnet assembly as claimed in claim 18, 10 wherein said movable portion is spring biased.20. A temporary speed restriction track unit for interacting with a warning system in a train, said temporary speed restriction track unit comprising: 15 a fibre glass housing having a magnet assembly therein; a single clamp for securing said housing to just one rail and for positioning said magnet assembly in the middle of two rails; and 20 means for locking said clamp to said rail.Amended claims have been filed as follows 75972003c3 Claims 5 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 10 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.20 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 25 in any preceding claim, wherein said magnet is housed in a protective fibre glass housing.S. A temporary speed restriction track unit as claimed in any preceding claim, wherein one or more rubber 30 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 35 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 bepositioned 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.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB0115786A GB0115786D0 (en) | 2001-06-28 | 2001-06-28 | Temporary speed restriction track |
| GB0215019A GB2379069B (en) | 2001-06-28 | 2002-06-28 | Temporary speed restriction track unit |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| GB0319942D0 GB0319942D0 (en) | 2003-09-24 |
| GB2390721A true GB2390721A (en) | 2004-01-14 |
| GB2390721B GB2390721B (en) | 2004-03-03 |
Family
ID=29738067
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB0319942A Expired - Fee Related GB2390721B (en) | 2001-06-28 | 2002-06-28 | Temporary speed restriction track unit |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB2390721B (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| ITRM20120110A1 (en) * | 2012-03-21 | 2013-09-22 | Ecm S P A | MOUNTING DEVICE FOR MOUNTING A BALISE PAIR TO A RAILWAY TRACK AND SYSTEM INCLUDING THE DEVICE |
| ITRM20120109A1 (en) * | 2012-03-21 | 2013-09-22 | Ecm S P A | CONTROL SYSTEM OF A PAIR OF BALISES |
| ITRM20120107A1 (en) * | 2012-03-21 | 2013-09-22 | Ecm S P A | MOBILE RAILWAY SIGNALING DEVICE AND MOBILE REPORTING SYSTEM INCLUDING THE DEVICE |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2147350A (en) * | 1983-10-03 | 1985-05-09 | Servo Corp Of America | Rail clamp for railway equipment |
| EP0374697A1 (en) * | 1988-12-14 | 1990-06-27 | ING. JOSEF FRAUSCHER Hydraulik und Sensortechnik | Device for attaching switching and measuring devices |
-
2002
- 2002-06-28 GB GB0319942A patent/GB2390721B/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2147350A (en) * | 1983-10-03 | 1985-05-09 | Servo Corp Of America | Rail clamp for railway equipment |
| EP0374697A1 (en) * | 1988-12-14 | 1990-06-27 | ING. JOSEF FRAUSCHER Hydraulik und Sensortechnik | Device for attaching switching and measuring devices |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| ITRM20120110A1 (en) * | 2012-03-21 | 2013-09-22 | Ecm S P A | MOUNTING DEVICE FOR MOUNTING A BALISE PAIR TO A RAILWAY TRACK AND SYSTEM INCLUDING THE DEVICE |
| ITRM20120109A1 (en) * | 2012-03-21 | 2013-09-22 | Ecm S P A | CONTROL SYSTEM OF A PAIR OF BALISES |
| ITRM20120107A1 (en) * | 2012-03-21 | 2013-09-22 | Ecm S P A | MOBILE RAILWAY SIGNALING DEVICE AND MOBILE REPORTING SYSTEM INCLUDING THE DEVICE |
| WO2013140431A1 (en) * | 2012-03-21 | 2013-09-26 | ECM S.p.A. | Mobile railway signalling device and mobile signalling system including said device |
| WO2013140430A1 (en) * | 2012-03-21 | 2013-09-26 | ECM S.p.A. | Control apparatus of a pair of balises |
| WO2013140429A3 (en) * | 2012-03-21 | 2013-12-12 | ECM S.p.A. | Mounting device for mounting a pair of balises to a railway track and system comprising said device |
Also Published As
| Publication number | Publication date |
|---|---|
| GB0319942D0 (en) | 2003-09-24 |
| GB2390721B (en) | 2004-03-03 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PCNP | Patent ceased through non-payment of renewal fee |
Effective date: 20100628 |