CA1067472A - Device suitable for use in a railway rail-and-fastening assembly to insulate a rail from a rail clip and from an anchorage for the clip - Google Patents
Device suitable for use in a railway rail-and-fastening assembly to insulate a rail from a rail clip and from an anchorage for the clipInfo
- Publication number
- CA1067472A CA1067472A CA269,289A CA269289A CA1067472A CA 1067472 A CA1067472 A CA 1067472A CA 269289 A CA269289 A CA 269289A CA 1067472 A CA1067472 A CA 1067472A
- Authority
- CA
- Canada
- Prior art keywords
- rail
- anchorage
- clip
- flat surface
- flange
- 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.)
- Expired
Links
Landscapes
- Railway Tracks (AREA)
Abstract
Abstract:
A device suitable for use in a railway rail-and-fastening assembly to insulate a rail from a rail clip and from an anchorage for the clip includes an elongate plate-like portion, a portion depending from one side of it and two lugs projecting from the depending portion away from the plate-like portion near opposite ends thereof. In contrast to prior proposals, the device is asymetrical, a flat surface on the top of the plate like portion having its center nearer one end of that portion than the other end. A ramp surface leads up to the flat surface from at least other end. The device i preferably made wholly of glass fibre-reinforced nylon and the thickness of the plate-like portion is preferably at least 5 millimeters
A device suitable for use in a railway rail-and-fastening assembly to insulate a rail from a rail clip and from an anchorage for the clip includes an elongate plate-like portion, a portion depending from one side of it and two lugs projecting from the depending portion away from the plate-like portion near opposite ends thereof. In contrast to prior proposals, the device is asymetrical, a flat surface on the top of the plate like portion having its center nearer one end of that portion than the other end. A ramp surface leads up to the flat surface from at least other end. The device i preferably made wholly of glass fibre-reinforced nylon and the thickness of the plate-like portion is preferably at least 5 millimeters
Description
10679~7Z
AN ELECTRI Q L INSULATOR SUITABLE FOR USE IN
A RAILWAY RAIL-AND-FASTENING ASSEMBLY TO
INSULATE A RAIL FROM A RAIL CLIP AND FROM
AN ANCHORAGE FOR THE CLIP
According to a first aspect of the invention~
there is provided a device suitable for use in a railway rail-and-fastening assembly to electrically insulate a rail from a rail clip, which bears downwardly upon the upper surface of the rail flange, and from an anchorage, beside the rail flange, for the rail clip, the device in-cluding a first, elongate, plate-like, portion for ~positioning on the rail flange, a second portion depending from one side of the first portion, for positioning~between the~edge of the rail flange and the anchorage, and two lugs projecting from the second portlon in the same direction as one another away from the first portion and near opposite ends thereof, said lugs serving to project on opposite sides of the anchorage to limit movement of the device along the rail, said first portion comprising, on its upper face, a flat surface upon which the clip is to bear, the centre of this flat surface being nearer to one end of said first portion than it is to the other end of said first portion, and said first portion further comprising~a ramp surface leading up to said flat surface from said other end of the first portion.
Preferably, the device has another and steeper ramp surface leading up to said flat surface from ~said one end of the first portion.
The de~ice may be made wholly of fibre~reinforced ~ 30 pla5tics material.
-~ The thickness of ehe eloctrlcal1y insu1atiAg ~)674~
material in the first portion is preferably more than 5 mm,/ better more than 6 mm., better still more than 7 mm.
and even better more than 8 mm.
According to a second aspect of the invention, there is provided a device suitable for use in a railway rail-and-fastening assembly to insulate a rail from a rail clip and from an anchorage for the clip, comprising a single piece of fibre-reinforced plastic material, having a first portion which is elongate, trapezoidal and plate- "
like, with-a thickness of at least 5 mm., a second portion depending from one side o the first portion, and first and second lugs projecting from the second~portion in the same direction as one another away from the first portion and near first and second ends, respectively, thereof, said first portion comprising on its upper face an elongate ( flat surface, the center of which is substantially nearer to said first end of said first portion than to said second end of said first portion, a first ramp surface leading up to said flat surface from said first end of said first portion, a second ramp surface leading up to said flat surface from said second end of said first portion, said first ramp surface havlng an angle from the hori~ontal sub-stantially greater than the angle of said second ramp surface from the horizontal.
The device according to the first or second aspect of the invention may be made wholly of fibre-rein-forced (preferably glass fibre-reinforced) nylon.
According to a third aspect of the invention, there is provided a railway rail-and-fastening assembly comprising an electrically conductive rail foundation, an electrically insulating pad placed on the rail foundation, a rail standing on the pad, an anchorage beside the rail flange, a rail clip held by the anchorage, a device accord-ing to the first or second aspect of the invention with its first portion on the rail flange and its second portion between the edge of the rail flange and the anchorage and with the clip bearing downwardly on the upper side o~ its first portion.
An example of a device according to the first and .
.
~()6747;~ ~
~ 3/4/5 second aspects of the invention is described be.low with reference to the accompanying drawing, in which:-Figure 1 shows a plan view, Fiyure 2 shows an end elevation, and Figure 3 shows a side elevation, of an electrical insulator.
The insulator is made wholly of glass fibre-reinforced nylon and is made by moulding such material in a single piece which includes an elongate, trapezoidal, fir=t, plate-.
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. ` ' 1 - like~ portion 1 for positioning on the ~lange of a railway rail which stands on an electrlcally in-- sulatin~ pad placed on an electrically conductive foundation for the rail, for example a concrete railway sleeper. It further includes a second portion
AN ELECTRI Q L INSULATOR SUITABLE FOR USE IN
A RAILWAY RAIL-AND-FASTENING ASSEMBLY TO
INSULATE A RAIL FROM A RAIL CLIP AND FROM
AN ANCHORAGE FOR THE CLIP
According to a first aspect of the invention~
there is provided a device suitable for use in a railway rail-and-fastening assembly to electrically insulate a rail from a rail clip, which bears downwardly upon the upper surface of the rail flange, and from an anchorage, beside the rail flange, for the rail clip, the device in-cluding a first, elongate, plate-like, portion for ~positioning on the rail flange, a second portion depending from one side of the first portion, for positioning~between the~edge of the rail flange and the anchorage, and two lugs projecting from the second portlon in the same direction as one another away from the first portion and near opposite ends thereof, said lugs serving to project on opposite sides of the anchorage to limit movement of the device along the rail, said first portion comprising, on its upper face, a flat surface upon which the clip is to bear, the centre of this flat surface being nearer to one end of said first portion than it is to the other end of said first portion, and said first portion further comprising~a ramp surface leading up to said flat surface from said other end of the first portion.
Preferably, the device has another and steeper ramp surface leading up to said flat surface from ~said one end of the first portion.
The de~ice may be made wholly of fibre~reinforced ~ 30 pla5tics material.
-~ The thickness of ehe eloctrlcal1y insu1atiAg ~)674~
material in the first portion is preferably more than 5 mm,/ better more than 6 mm., better still more than 7 mm.
and even better more than 8 mm.
According to a second aspect of the invention, there is provided a device suitable for use in a railway rail-and-fastening assembly to insulate a rail from a rail clip and from an anchorage for the clip, comprising a single piece of fibre-reinforced plastic material, having a first portion which is elongate, trapezoidal and plate- "
like, with-a thickness of at least 5 mm., a second portion depending from one side o the first portion, and first and second lugs projecting from the second~portion in the same direction as one another away from the first portion and near first and second ends, respectively, thereof, said first portion comprising on its upper face an elongate ( flat surface, the center of which is substantially nearer to said first end of said first portion than to said second end of said first portion, a first ramp surface leading up to said flat surface from said first end of said first portion, a second ramp surface leading up to said flat surface from said second end of said first portion, said first ramp surface havlng an angle from the hori~ontal sub-stantially greater than the angle of said second ramp surface from the horizontal.
The device according to the first or second aspect of the invention may be made wholly of fibre-rein-forced (preferably glass fibre-reinforced) nylon.
According to a third aspect of the invention, there is provided a railway rail-and-fastening assembly comprising an electrically conductive rail foundation, an electrically insulating pad placed on the rail foundation, a rail standing on the pad, an anchorage beside the rail flange, a rail clip held by the anchorage, a device accord-ing to the first or second aspect of the invention with its first portion on the rail flange and its second portion between the edge of the rail flange and the anchorage and with the clip bearing downwardly on the upper side o~ its first portion.
An example of a device according to the first and .
.
~()6747;~ ~
~ 3/4/5 second aspects of the invention is described be.low with reference to the accompanying drawing, in which:-Figure 1 shows a plan view, Fiyure 2 shows an end elevation, and Figure 3 shows a side elevation, of an electrical insulator.
The insulator is made wholly of glass fibre-reinforced nylon and is made by moulding such material in a single piece which includes an elongate, trapezoidal, fir=t, plate-.
~ :
:: :
:
:: : : : :
~: : :
:: :: : :
~ -,~.~, ~ : ~ . , :
' ~06747Z
. ` ' 1 - like~ portion 1 for positioning on the ~lange of a railway rail which stands on an electrlcally in-- sulatin~ pad placed on an electrically conductive foundation for the rail, for example a concrete railway sleeper. It further includes a second portion
2 depending from one side of the first portion, the longer of the two parallel sides, for ~positioning between the edge of the rail flange and an anchorage for a rail clip, the anchorage being for example made of cast malleable iron with a portion embedded ~n the sleeper where the latter is of concrete. A rail clip, made by bending a steel bar of circular cross-; section, has one portion held by the anchorage and - another portion bearing down~ardly on the upper side o the first portion of the Lnsulator. The insulator - electrically insulates the rail from the clip~and from the anchorage~ Two lugs 3 pro~ect from the second portion 2 in the same direction as one another away ` from the first portion 1 near opposite ends of the first portion 1 and in use of the insulator they pro~ect on opposite sides of the anchorage to~limit~movement of the insulator along the rail. -; - The insulator includes, on lts face which is uppermost when it is in use, a rectangular flat surface 4, over the whole of which the thickness of the first portion l is 8 mm~boun~ed at two opposite sides by the ', :, ~L06~47z 1 - lines 5, the centre 6 of this ~lat surface being dis-placed, in the direction in which the rail-extends - when the insulator is in use, by a distance X from a point 7 mldway between the lugs 3. Thus the centr~
of th~ flat surface 4 is nearer to that end o~ the first portion which is shown uppermost in Flgure 1 than it is to:the other end of the first portion~
::
There are a short and steep ramp surface 8 and:a longer and less steep ramp surface 9 extending from .
10 ~ opposite ends of the first portion up to the flat ~
surface 4. Part of the clip rides up the ramp ~ ¦
: surface 9 in driving the clip into position. When fully driven, the area of contact between it and the lnsulator is substantially symmetrically positioned ~ ~ :
~: ~ with regard to the length of;:~the flat portion~4 of : - the insulator but not with regard to the length of the entire insulator.
:
:
7.
` '. . :
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of th~ flat surface 4 is nearer to that end o~ the first portion which is shown uppermost in Flgure 1 than it is to:the other end of the first portion~
::
There are a short and steep ramp surface 8 and:a longer and less steep ramp surface 9 extending from .
10 ~ opposite ends of the first portion up to the flat ~
surface 4. Part of the clip rides up the ramp ~ ¦
: surface 9 in driving the clip into position. When fully driven, the area of contact between it and the lnsulator is substantially symmetrically positioned ~ ~ :
~: ~ with regard to the length of;:~the flat portion~4 of : - the insulator but not with regard to the length of the entire insulator.
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7.
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Claims (13)
1. A device suitable for use in a railway rail-and-fastening assembly to electrically insulate a rail from a rail clip, which bears downwardly upon the upper surface of the rail flange, and from an anchorage, beside the rail flange, for the rail clip, the device including a first, elongate, plate-like, portion for positioning on the rail flange, a second portion depending from one side of the first portion, for positioning between the edge of the rail flange and the anchorage, and two lugs projecting from the second portion in the same direction as one another away from the first portion and near opposite ends thereof, said lugs serving to project on opposite sides of the anchorage to limit movement of the device along the rail, said first portion comprising, on its upper face, a flat surface upon which the clip is to bear, the centre of this flat surface being nearer to one end of said first portion than it is to the other end of said first portion, and said first portion further comprising a ramp surface leading up to said flat surface from said other end of the first portion.
2. A device according to claim 1 having another and steeper ramp surface leading up to said flat surface from said one end of the first portion.
3. A device according to claim 1 or 2 in which the thickness of the electrically insulating material in the first portion is more than 5 millimeters.
4. A device according to claim 1 or 2 in which the thickness of the electrically insulating material in the first portion is more than 6 millimeters.
5. A device according to claim 1 or 2 in which the thickness of the electrically insulating material in the first portion is more than 7 millimeters.
6. A device according to claim 1 or 2 in which the thickness of the electrically insulating material in the first portion is more than 8 millimeters.
7. A device according to claim 1 made wholly of fibre-reinforced plastic material.
8. A device suitable for use in a railway rail-and-fastening assembly to insulate a rail from a rail clip and from an anchorage for the clip, comprising a single piece of fibre-reinforced plastic material, having a first portion which is elongate, trapezoidal and plate-like, with a thickness of at least 5 mm., a second portion depending from one side of the first portion, and first and second lugs projecting from the second portion in the same direction as one another away from the first portion and near first and second ends, respect-ively, thereof, said first portion comprising on its upper face an elongate flat surface, the center of which is sub-stantially nearer to said first end of said first portion than to said second end of said first portion, a first ramp surface leading up to said flat surface from said first end of said first portion, a second ramp surface leading up to said flat surface from said second end of said first portion, said first ramp surface having an angle from the horizontal substantially greater than the angle of said second ramp surface from the horizontal.
9. A device according to claim 1, 2 or 8 made wholly of fibre-reinforced nylon.
10. A device according to claim 1, 2 or 8 made wholly of glass-fibre-reinforced nylon.
11. A railway rail-and-fastening assembly comprising an electrically conductive rail foundation, an electrically insulating pad placed on the rail foundation, a rail standing on the pad, an anchorage beside the rail flange, a rail clip held by the anchorage, a device according to claim 1, 2 or 7 with its first portion on the rail flange and its second portion between the edge of the rail flange and the anchorage and with the clip bearing downwardly on the upper side of its first portion.
12. A device according to claim 2 made wholly of fibre-reinforced plastic material.
13. A railway rail-and-fastening assembly comprising an electrically conductive rail foundation, an electrically insulating pad placed on the rail foundation, a rail standing on the pad, an anchorage beside the rail flange, a rail clip held by the anchorage, a device according to claim 8 or claim 12 with its first portion on the rail flange and its second portion between the edge of the rail flange and the anchorage and with the clip bearing downwardly on the upper side of its first portion.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA269,289A CA1067472A (en) | 1977-01-07 | 1977-01-07 | Device suitable for use in a railway rail-and-fastening assembly to insulate a rail from a rail clip and from an anchorage for the clip |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA269,289A CA1067472A (en) | 1977-01-07 | 1977-01-07 | Device suitable for use in a railway rail-and-fastening assembly to insulate a rail from a rail clip and from an anchorage for the clip |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1067472A true CA1067472A (en) | 1979-12-04 |
Family
ID=4107679
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA269,289A Expired CA1067472A (en) | 1977-01-07 | 1977-01-07 | Device suitable for use in a railway rail-and-fastening assembly to insulate a rail from a rail clip and from an anchorage for the clip |
Country Status (1)
| Country | Link |
|---|---|
| CA (1) | CA1067472A (en) |
-
1977
- 1977-01-07 CA CA269,289A patent/CA1067472A/en not_active Expired
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