GB2427953A - Railway warning detonator - Google Patents

Railway warning detonator Download PDF

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Publication number
GB2427953A
GB2427953A GB0612992A GB0612992A GB2427953A GB 2427953 A GB2427953 A GB 2427953A GB 0612992 A GB0612992 A GB 0612992A GB 0612992 A GB0612992 A GB 0612992A GB 2427953 A GB2427953 A GB 2427953A
Authority
GB
United Kingdom
Prior art keywords
assembly
rail
explosive
limbs
upstanding portion
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
GB0612992A
Other versions
GB0612992D0 (en
GB2427953B (en
Inventor
Alan Lindsay
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.)
Systems & Solutions
Original Assignee
Systems & Solutions
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 Systems & Solutions filed Critical Systems & Solutions
Publication of GB0612992D0 publication Critical patent/GB0612992D0/en
Publication of GB2427953A publication Critical patent/GB2427953A/en
Application granted granted Critical
Publication of GB2427953B publication Critical patent/GB2427953B/en
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B61—RAILWAYS
    • B61L—GUIDING RAILWAY TRAFFIC; ENSURING THE SAFETY OF RAILWAY TRAFFIC
    • B61L5/00—Local operating mechanisms for points or track-mounted scotch-blocks; Visible or audible signals; Local operating mechanisms for visible or audible signals
    • B61L5/12—Visible signals
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B61—RAILWAYS
    • B61L—GUIDING RAILWAY TRAFFIC; ENSURING THE SAFETY OF RAILWAY TRAFFIC
    • B61L5/00—Local operating mechanisms for points or track-mounted scotch-blocks; Visible or audible signals; Local operating mechanisms for visible or audible signals
    • B61L5/20—Audible signals, e.g. detonator audible signalling
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B61—RAILWAYS
    • B61L—GUIDING RAILWAY TRAFFIC; ENSURING THE SAFETY OF RAILWAY TRAFFIC
    • B61L5/00—Local operating mechanisms for points or track-mounted scotch-blocks; Visible or audible signals; Local operating mechanisms for visible or audible signals
    • B61L5/12—Visible signals
    • B61L5/125—Fixed signals, beacons, or the like
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B61—RAILWAYS
    • B61L—GUIDING RAILWAY TRAFFIC; ENSURING THE SAFETY OF RAILWAY TRAFFIC
    • B61L5/00—Local operating mechanisms for points or track-mounted scotch-blocks; Visible or audible signals; Local operating mechanisms for visible or audible signals
    • B61L5/20—Audible signals, e.g. detonator audible signalling
    • B61L5/203—Detonators; Track mounting means; Composition of the detonative product

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Train Traffic Observation, Control, And Security (AREA)

Abstract

A railway warning detonator or torpedo assembly (1) for mounting on a rail track (10) has spring biased attachment means (6d) to secure it to the rail. The attachment means comprises two limbs (6c) which are mounted for pivotal movement about an axis (6a) substantially perpendicular to the longitudinal axis of the rail (10). The device may also include a magnetic portion (5) which preferably forms the base of the warning device. The pivotal mounting may be located between the magnetic portion and the charge (2). A foam or sponge material (3) may also be disposed between the mounting and the charge. The device may also include an upright portion (4a) coated on both sides with reflective material visible to the driver of the oncoming train.

Description

* 2427953
EXPLOSIVE WARNING ASSEMBLIES
The present invention relates to explosive warning assemblies suitable for use on train track rails. Such devices are sometimes known as fog signals.
Various types of fog signal devices are known. Some are provided with lead straps which serve to attach the fog signal to a rail. With repeated use however the lead straps become weakened and are liable to break off from the device.
The present invention seeks to provide on alternative explosive warning assembly.
According to a first aspect of the invention there is provided an explosive warning assembly for use on train track rails, the assembly comprising spring-biased attachment means which comprises two limbs, which, in use, bear against opposite sides of a rail, at least one of the limbs being mounted for pivotal movement about an axis which is substantially perpendicular to the longitudinal axis of the rail.
Preferably the device comprises a magnetic portion. Preferably the magnetic portion forms a base of the assembly.
The pivotal mounting of the at least one limb is desirably located between the explosive material and the magnetic portion.
It is desirable that a foam or sponge material is provided between the pivotal mounting and the explosive material.
Most preferably both limbs are mounted for pivotal movement.
The assembly preferably comprises an upstanding portion which is provided with reflective material (desirably of the high-visibility' type) on at least one side thereof. Most preferably the upstanding portion defines an uppermost part of the assembly. Most preferably the upstanding portion is of sheet or plate form. It is highly desirable that reflective material is provided on opposite sides of the upstanding portion.
According to a further aspect of the invention there is provided an explosive warning assembly for use on train track rails, the device comprising explosive material, attachment means for attaching the device to a rail and an upstanding portion which is provided with reflective material, the upstanding portion providing an uppermost portion of the device.
Various embodiments of the invention will now be described, by way of example only, in which, Figure 1 is a side view of a fog signal attached to a rail, and Figure 2 is an end view on A-A of the fog signal of Figure 1.
Figure 1 shows a fog signal 1 attached to a rail 10, the fog signal 1 comprising an encapsulated explosive portion 2, a foam layer 3, substantially L-shaped metal frame 4, a magnetic portion 5 and a twolimbed spring 6.
The metal frame 4 comprises a basal portion 4b and an upstanding portion 4a. With regard to the upstanding portion 4a, opposite sides thereof 4d are provided with reflective material comprising a microprismic structure (often called high-visibility material'). The basal portion 4a extends substantially perpendicularly to the upstanding portion 4a and is provided with a channel 4c.
The foam layer 3 sits atop the basal portion 4b and serves to protect the encapsulated explosive portion 2 from the channel formation 4c.
The spring 6 comprises two limbs 6c, two turns 6b and an intermediate portion 6a. The intermediate portion is accommodated in the channel formation 4c. The free-ends of each of the limbs 6c are provided by curled portions 6d. The turns 6b serve to provide the required degree of resilience to the limbs 6c.
The magnetic portion 5 is provided underneath the basal portion 4b, and comprises ferrite material so as to be magnetically attractive to a rail.
The fog signal assembly 1 is used as follows. With the spring 6 in the position shown by the broken lines the signal is placed on the upper surface of the head lOa of the rail 10 so that the magnetic portion 5 is magnetically attached thereto. The limbs 6c are then pivoted in the sense shown. In so doing the limbs are deflected so as to negotiate the head iQa until eventually the free-ends 6d bear against neck portions lOb of the rail. The engagement of the free-ends 6d with the curved neck portions lOb causes a camming effect which acts to hold the fog signal 1 flat against the uppermost surface of the rail 10. As yet a further advantage the pivotal mounting of limbs 6c facilitates storage of multiple fog signals in a storage container.
In the event that a train should run over a fog signal the explosive portion will detonate and so provide an audible signal.
Because the upstanding portion stands proud the high-visibility reflective material can be seen from far away and so alerting a train driver to the presence of fog signals. The upstanding portion 4a accordingly provides a visible (early) warning signal. The high visibility nature of the fog signals assembly 1 also serves as a reminder to trackside workers to remove the fog signals once any maintenance work (for example) is completed, and also facilitates the collection process in darkness or poor visibility.
It will be appreciated that in an alternative embodiment only one of the limbs may be pivotable, with the other fixed relative to the signal assembly.
In yet a further alternative embodiment the magnetic portion is omitted and the signal assembly is secured to a rail solely by way of the spring limbs.

Claims (12)

1. An explosive warning assembly for use on train track rails, the assembly comprising spring-biased attachment means which comprises two limbs, which, in use, bear against opposite sides of a rail, at least one of the limbs being mounted for pivotal movement about an axis which is substantially perpendicular to the longitudinal axis of the rail.
2. An assembly as claimed in claim 1 in which the device comprises a magnetic portion.
3. An assembly as claimed in claim 2 in which the magnetic portion forms a base of the assembly.
4. An assembly as claimed in any preceding claim in which the pivotal mounting of the at least one limb is located between the explosive material and the magnetic portion.
5. An assembly as claimed in any preceding claim in which a foam or sponge material is provided between the pivotal mounting and the explosive material.
6. An assembly as claimed in any preceding claim in which both limbs are mounted for pivotal movement.
7. An assembly as claimed in any preceding claim which comprises an upstanding portion which is provided with light reflective material on at least one side thereof.
8. An assembly as claimed in claim 7 in which the upstanding portion defines an uppermost part of the assembly.
9. An assembly as claimed in claim 7 or claim 8 in which the upstanding portion is of sheet or plate form.
10. An assembly as claimed in any of claims 7 to 9 in which the reflective material is provided on opposite sides of the upstanding portion.
11. An explosive warning assembly for use on train track rails, the device comprising explosive material, attachment means for attaching the device to a rail and an upstanding portion which is provided with reflective material, the upstanding portion providing an uppermost portion of the device.
12. An explosive warning assembly substantially as herein described with reference to the accompanying Figures.
GB0612992A 2005-06-30 2006-06-30 Explosive warning assemblies Expired - Fee Related GB2427953B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GBGB0513342.6A GB0513342D0 (en) 2005-06-30 2005-06-30 Explosive warning assemblies

Publications (3)

Publication Number Publication Date
GB0612992D0 GB0612992D0 (en) 2006-08-09
GB2427953A true GB2427953A (en) 2007-01-10
GB2427953B GB2427953B (en) 2009-06-03

Family

ID=34856392

Family Applications (2)

Application Number Title Priority Date Filing Date
GBGB0513342.6A Ceased GB0513342D0 (en) 2005-06-30 2005-06-30 Explosive warning assemblies
GB0612992A Expired - Fee Related GB2427953B (en) 2005-06-30 2006-06-30 Explosive warning assemblies

Family Applications Before (1)

Application Number Title Priority Date Filing Date
GBGB0513342.6A Ceased GB0513342D0 (en) 2005-06-30 2005-06-30 Explosive warning assemblies

Country Status (1)

Country Link
GB (2) GB0513342D0 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR3070953A1 (en) * 2017-09-13 2019-03-15 4Nrj LIGHTING DEVICE FOR RAILWAYS

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1478592A (en) * 1923-06-02 1923-12-25 Frederic L Wanklyn Railway-track signal
US1565067A (en) * 1925-07-22 1925-12-08 Dutcher Frank Railway signal torpedo
US1861724A (en) * 1932-01-18 1932-06-07 Equitable Powder Mfg Company Railway torpedo
FR1338035A (en) * 1962-10-19 1963-09-20 Rocket laying warning signal for railway track

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB191329266A (en) * 1913-12-18 1914-08-07 William Samuel Leng Improvements in or relating to Flag Signals for use on Railways.
US2061871A (en) * 1934-08-23 1936-11-24 Robert R Wooten Signal
EP0262844A3 (en) * 1986-09-24 1989-07-12 The Commonwealth Of Australia Signalling device
GB0002474D0 (en) * 2000-02-04 2000-03-22 Site Access Services Limited Fog signal attachment means

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1478592A (en) * 1923-06-02 1923-12-25 Frederic L Wanklyn Railway-track signal
US1565067A (en) * 1925-07-22 1925-12-08 Dutcher Frank Railway signal torpedo
US1861724A (en) * 1932-01-18 1932-06-07 Equitable Powder Mfg Company Railway torpedo
FR1338035A (en) * 1962-10-19 1963-09-20 Rocket laying warning signal for railway track

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR3070953A1 (en) * 2017-09-13 2019-03-15 4Nrj LIGHTING DEVICE FOR RAILWAYS

Also Published As

Publication number Publication date
GB0513342D0 (en) 2005-08-03
GB0612992D0 (en) 2006-08-09
GB2427953B (en) 2009-06-03

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Legal Events

Date Code Title Description
PCNP Patent ceased through non-payment of renewal fee

Effective date: 20150630