GB1579904A - Electric cable installations and securing means therefor - Google Patents
Electric cable installations and securing means therefor Download PDFInfo
- Publication number
- GB1579904A GB1579904A GB14158/78A GB1415878A GB1579904A GB 1579904 A GB1579904 A GB 1579904A GB 14158/78 A GB14158/78 A GB 14158/78A GB 1415878 A GB1415878 A GB 1415878A GB 1579904 A GB1579904 A GB 1579904A
- Authority
- GB
- United Kingdom
- Prior art keywords
- cables
- strap
- group
- cable
- sub
- 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
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L3/00—Supports for pipes, cables or protective tubing, e.g. hangers, holders, clamps, cleats, clips, brackets
- F16L3/22—Supports for pipes, cables or protective tubing, e.g. hangers, holders, clamps, cleats, clips, brackets specially adapted for supporting a number of parallel pipes at intervals
- F16L3/223—Supports for pipes, cables or protective tubing, e.g. hangers, holders, clamps, cleats, clips, brackets specially adapted for supporting a number of parallel pipes at intervals each support having one transverse base for supporting the pipes
- F16L3/2235—Supports for pipes, cables or protective tubing, e.g. hangers, holders, clamps, cleats, clips, brackets specially adapted for supporting a number of parallel pipes at intervals each support having one transverse base for supporting the pipes each pipe being supported by a common element fastened to the base
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L3/00—Supports for pipes, cables or protective tubing, e.g. hangers, holders, clamps, cleats, clips, brackets
- F16L3/24—Supports for pipes, cables or protective tubing, e.g. hangers, holders, clamps, cleats, clips, brackets with a special member for attachment to profiled girders
- F16L3/243—Supports for pipes, cables or protective tubing, e.g. hangers, holders, clamps, cleats, clips, brackets with a special member for attachment to profiled girders the special member being inserted in the profiled girder
- F16L3/2431—Supports for pipes, cables or protective tubing, e.g. hangers, holders, clamps, cleats, clips, brackets with a special member for attachment to profiled girders the special member being inserted in the profiled girder the special member being inserted and subsequently rotated to a limited extent
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02G—INSTALLATION OF ELECTRIC CABLES OR LINES, OR OF COMBINED OPTICAL AND ELECTRIC CABLES OR LINES
- H02G3/00—Installations of electric cables or lines or protective tubing therefor in or on buildings, equivalent structures or vehicles
- H02G3/02—Details
- H02G3/04—Protective tubing or conduits, e.g. cable ladders or cable troughs
- H02G3/0456—Ladders or other supports
Description
(54) IMPROVEMENTS IN OR RELATING TO ELECTRIC CABLE
INSTALLATIONS AND SECURING MEANS THEREFOR
(71) We, BICC LIMITED, a British Company, of 21 Bloomsbury Street, London
WC1B 3QN, do hereby declare the invention, for which we pray that a patent may be granted to us, and the method by which it is to be performed, to be particularly described in and by the following statement:- This invention relates to installations of the kind comprising a group of electric cables, service pipes, or other elongate members (all such elongate members hereinafter being included in the generic term "cables") arranged side-by-side on and secured at one or each of more than one position along their lengths to a supporting surface by a flexible strap which extends transversely across the group of cables and, on each side of the group, is attached to the supporting surface.
A cable installation of the aforesaid kind will hereinafter be referred to as "a cable installation of the kind described".
According to the present invention, in a cable installation of the kind described, at least one of the cables and/or at least one sub-group of the cables is transversely spaced from the other cable or cables and the flexible strap is also attached to the supporting surface at the or each position between two transversely-spaced cables or two transversely-spaced sub-groups of cables or between a transversely-spaced cable and subgroup of cables, at least some, and preferably all except one, of the means attaching the strap to the supporting surface being so adjustable that the tension in an adjacent part or in each of two adjacent parts of the strap overlying a cable or sub-group of cables is adjustable independently of the tension in each other part of the strap overlying another cable or sub-group of cables.
The cables of the or each sub-group of cables will preferably be of substantially the same diameter as one another and may be arranged with their axes lying in a substantially common plane which is parallel to the supporting surface or in a substantially common plane which is perpendicular to the supporting surface.
Preferably at least one of the means attaching the strap to the supporting surface is non-adjustable and comprises a hook or other device which is integral with or connected to the strap and which passes through and engages with an aperture or slot in the supporting surface. Preferably there is only one non-adjustable means and this is integral with or connected to one end of the strap.
Alternatively all of the means attaching the strap to the supporting surface are adjustable.
It is preferred that the supporting surface is a cable tray, cable ladder, or a channel having extending along its length a slot defined by a pair of flanges, or other perforated or slotted plate.
Preferably, each adjustable attachment means comprises a nut and bolt and in a preferred embodiment that part of the head of the bolt or the nut or of a separate washer carried by the bolt in contact with the strap is so shaped that the strap follows a smoothly curved path and therefore is less liable to fracture when the bolt is tightened to increase the tension in the adjacent part or parts of the strap. Where the supporting surface is in the form of a channel the nut or the head engages behind the flanges of the channel so that it is prevented from rotating when the nut and bolt is tightened.
The strap is preferably made of metal or metal alloy, plastics coated metal or metal alloy or wholly of plastics material and may or may not be pre-perforated. Where the strap is made of plastics coated metal or metal alloy, preferably the metal or metal alloy strap is pre-perforated and the plastics coating is unperforated, the plastics material of the coating being punched out as and where required.
The invention also includes a kit of parts for securing a group of cables, arranged side-by-side to a supporting surface, which kit comprises at least one length of flexible strap, for adjustably attaching the strap or straps to the supporting surface, a plurality of nuts and bolts, that part of the head of each bolt or of each nut or of a separate washer to be carried by a bolt which will be in contact with the strap when the strap is tightened over a group of cables being so shaped that the strap will follow a smoothly curved path, and integral with or connected to at least one end of the or each strap a hook or other device for detachably engaging in an aperture of slot in a supporting surface.
The kit of parts of the present invention is especially, but not exclusively, suitable for use in combination with the cable ladders manufactured and sold by BICC Components
Ltd. under the Trade Mark "Leprack" as
Leprack Channel.
The invention is further illustrated by a description, by way of example, with reference to the accompanying drawings in which Figure 1 is a transverse cross-sectional view of a cable installation in accordance with the invention;
Figure 2 is a fragmental plan view and an end view of a flexible strap used in the cable installation;
Figure 3 is a side, end and plan view of a hook which is secured to the end of the strap;
Figure 4 is a plan and side view and a transverse cross-section of a saddle block carried on a bolt constituting an adjustable attachment means for the strap;
Figure 5 is a side, end and plan view of a nut for engaging the bolt of the adjustable attachment means; and
Figure 6 is a transverse cross-section of a slotted channel to which the cables of the cable installation are secured.
The installation 1 shown in Figure 1 comprises cables 2, 3, 4, 5 and a sub-group of cables 6, 7 secured to a cable ladder in the form of a slotted channel 8 by a preperforated flexible metal strap 9. The slotted channel 8 is shown more clearly in crosssection in Figure 6 and comprises a base 29, side walls 27, 28 and flanges 15, 16 defining the slot 17. The cables 2 to 5 and sub-group of cables 6, 7 are transversely spaced apart on the support. The strap 9 is attached, at one end, to the channel 8 by a hook 10 which, as shown in Figure 3, has a protrusion 11 passing through one of the perforations 12 (Figure 2) in the strap 9 engage the strap, and grooves 13, 14 engaging the channel 8 behind the flanges 15, 16. The strap 9 is also attached to the channel 8 between each of the cables 2 to 5 and sub-group of cables 6, 7 and at the other end of the strap by adjustable attachment means 18, each of which comprises a bolt 19, a washer in the form of a saddle block 20, and a shaped nut 21. Each saddle block 20, as shown in Figure 4, has a curved surface 22 which contacts the strap 9 so that the strap follows a smoothly curved path. Each shaped nut 21, as shown in
Figure 5, has grooves 23, 24 which also engage the flanges 15, 16 of the channel 8. Each nut 21 is shaped so that on assembly of the installation each nut can be screwed onto the bolt 19, passed through the slot 17 in the channel 8, and rotated through approximately 90" so that the ends 25, 26 of each nut engage the side walls 27, 28 of the channel and prevent further rotation of each nut. Each bolt
19 can then be tightened without the use of a spanner on the nut until the grooves 23, 24 in each nut 21 engage the flanges 15, 16 of the channel 8, and tightened further, if necessary, to increase the tension in the adjacent part or parts of the strap 9 to the required level.
A cable installation in accordance with the invention has the important advantages that cables or sub-groups of cables of diameters different from one another can be independently secured to a supporting surface, and that any cable or sub-group of cables can be removed from the installation by loosening an adjacent adjustable attachment means, which is re-tightened after removal of the cable or sub-group of cables to leave a gap in the installation but with the other cables still secured.
WHAT WE CLAIM IS:
1. A cable installation comprising a group of cables arranged side-by-side on and secured at one or each of more than one position along their lengths to a supporting surface by a flexible strap which extends transversely across the group of cables and, on each side of the group, is attached to the supporting surface, wherein at least one of the cables and/or at least one sub-group of the cables is transversely spaced from the other cable or cables and the flexible strap is also attached to the supporting surface at the or each position between two transverselyspaced cables or two transversely-spaced sub-groups of cables, or between a transversely spaced cable and sub-group of cables, at least some of the means attaching the strap to the supporting surface being so adjustable that the tension in an adjacent part or in each of two adjacent parts of the strap overlying a cable or sub-group of cables is adjustable independently of the tension in each other part of the strap overlying another cable or sub-group of cables.
2. A cable installation comprising a group of cables arranged side-by-side on and secured at one or each of more than one position along their lengths to a supporting surface by a flexible strap which extends transversely across the group of cables and, on each side of the group, is attached to the supporting surface, wherein at least one of the cables and/or at least one sub-group of the cables is transversely spaced from the other cable or cables and the flexible strap is also attached
**WARNING** end of DESC field may overlap start of CLMS **.
Claims (1)
- **WARNING** start of CLMS field may overlap end of DESC **.kit comprises at least one length of flexible strap, for adjustably attaching the strap or straps to the supporting surface, a plurality of nuts and bolts, that part of the head of each bolt or of each nut or of a separate washer to be carried by a bolt which will be in contact with the strap when the strap is tightened over a group of cables being so shaped that the strap will follow a smoothly curved path, and integral with or connected to at least one end of the or each strap a hook or other device for detachably engaging in an aperture of slot in a supporting surface.The kit of parts of the present invention is especially, but not exclusively, suitable for use in combination with the cable ladders manufactured and sold by BICC Components Ltd. under the Trade Mark "Leprack" as Leprack Channel.The invention is further illustrated by a description, by way of example, with reference to the accompanying drawings in which Figure 1 is a transverse cross-sectional view of a cable installation in accordance with the invention; Figure 2 is a fragmental plan view and an end view of a flexible strap used in the cable installation; Figure 3 is a side, end and plan view of a hook which is secured to the end of the strap; Figure 4 is a plan and side view and a transverse cross-section of a saddle block carried on a bolt constituting an adjustable attachment means for the strap; Figure 5 is a side, end and plan view of a nut for engaging the bolt of the adjustable attachment means; and Figure 6 is a transverse cross-section of a slotted channel to which the cables of the cable installation are secured.The installation 1 shown in Figure 1 comprises cables 2, 3, 4, 5 and a sub-group of cables 6, 7 secured to a cable ladder in the form of a slotted channel 8 by a preperforated flexible metal strap 9. The slotted channel 8 is shown more clearly in crosssection in Figure 6 and comprises a base 29, side walls 27, 28 and flanges 15, 16 defining the slot 17. The cables 2 to 5 and sub-group of cables 6, 7 are transversely spaced apart on the support. The strap 9 is attached, at one end, to the channel 8 by a hook 10 which, as shown in Figure 3, has a protrusion 11 passing through one of the perforations 12 (Figure 2) in the strap 9 engage the strap, and grooves 13, 14 engaging the channel 8 behind the flanges 15, 16. The strap 9 is also attached to the channel 8 between each of the cables 2 to 5 and sub-group of cables 6, 7 and at the other end of the strap by adjustable attachment means 18, each of which comprises a bolt 19, a washer in the form of a saddle block 20, and a shaped nut 21. Each saddle block 20, as shown in Figure 4, has a curved surface 22 which contacts the strap 9 so that the strap follows a smoothly curved path. Each shaped nut 21, as shown in Figure 5, has grooves 23, 24 which also engage the flanges 15, 16 of the channel 8. Each nut 21 is shaped so that on assembly of the installation each nut can be screwed onto the bolt 19, passed through the slot 17 in the channel 8, and rotated through approximately 90" so that the ends 25, 26 of each nut engage the side walls 27, 28 of the channel and prevent further rotation of each nut. Each bolt19 can then be tightened without the use of a spanner on the nut until the grooves 23, 24 in each nut 21 engage the flanges 15, 16 of the channel 8, and tightened further, if necessary, to increase the tension in the adjacent part or parts of the strap 9 to the required level.A cable installation in accordance with the invention has the important advantages that cables or sub-groups of cables of diameters different from one another can be independently secured to a supporting surface, and that any cable or sub-group of cables can be removed from the installation by loosening an adjacent adjustable attachment means, which is re-tightened after removal of the cable or sub-group of cables to leave a gap in the installation but with the other cables still secured.WHAT WE CLAIM IS: 1. A cable installation comprising a group of cables arranged side-by-side on and secured at one or each of more than one position along their lengths to a supporting surface by a flexible strap which extends transversely across the group of cables and, on each side of the group, is attached to the supporting surface, wherein at least one of the cables and/or at least one sub-group of the cables is transversely spaced from the other cable or cables and the flexible strap is also attached to the supporting surface at the or each position between two transverselyspaced cables or two transversely-spaced sub-groups of cables, or between a transversely spaced cable and sub-group of cables, at least some of the means attaching the strap to the supporting surface being so adjustable that the tension in an adjacent part or in each of two adjacent parts of the strap overlying a cable or sub-group of cables is adjustable independently of the tension in each other part of the strap overlying another cable or sub-group of cables.2. A cable installation comprising a group of cables arranged side-by-side on and secured at one or each of more than one position along their lengths to a supporting surface by a flexible strap which extends transversely across the group of cables and, on each side of the group, is attached to the supporting surface, wherein at least one of the cables and/or at least one sub-group of the cables is transversely spaced from the other cable or cables and the flexible strap is also attachedto the supporting surface at the or each position between two transversely-spaced cables or two transversely-spaced sub-groups of cables, or between a transversely-spaced cable and sub-group of cables, all except one of the means attaching the strap to the supporting surface being so adjustable that the tension in an adjacent part or in each of two adjacent parts of the strap overlying a cable or sub-group of cables is adjustable independently of the tension in each other part of the strap overlying another cable or sub-group of cables.3. A cable installation as claimed in any one of the preceding Claims, wherein the supporting surface is a cable tray, cable ladder, or other perforated or slotted plate.4. A cable installation as claimed in any one of the preceding Claims, wherein each adjustable attachment means comprises a nut and bolt.5. A cable installation comprising a supporting surface in the form of a channel having extending along its length a slot defined by a pair of flanges, a group of cables arranged side-by-side on and secured at one or each of more than one position along their lengths to the channel by a flexible strap which extends transversely across the group of cables and, on each side of the group, is attached to the channel, wherein at least one of the cables and/or at least one sub-group of the cables is transversely spaced from the other cable or cables and the flexible strap is also attached to the channel at the or each position between two transverselyspaced cables or two transversely spaced sub-groups, of cables, or between a transversely-spaced cable and sub-group of cables, at least some of the means attaching the strap to the slotted channel being nuts and bolts, the nut or the bolt-head of each nut and bolt so engaging behind the flanges of the channel that it is prevented from rotating when the nut and bolt is tightened, and the nuts and bolts being so adjustable that the tension in an adjacent part or in each of the adjacent parts of the strap overlying a cable or sub-group of cables is adjustable independently of the tension in each other part of the strap overlying another cable or sub-group of cables.6. A cable installation as claimed in Claim 5, wherein all except one of the means attaching the strap to the supporting surface are adjustable.7. A cable installation as claimed in any one of Claims 4 to 6, wherein that part of the head of the bolt or of the nut or of a separate washer carried by the bolt in contact with the strap is so shaped that the strap follows a smoothly curved path.8. A cable installation as claimed in any one of Claims 1 to 7, wherein the or each attachment means which is nonadjustable comprises a hook or other device which is integral with or connected to the strap which passes through and engages with an aperture or slot in the supporting surface.9. A cable installation as claimed in Claim 8 in which the strap is attached to the supporting surface by one non-adjustable means, wherein the non-adjustable means is integral with or connected to one end of the strap.10. A cable installation as claimed in Claim 1 or Claim 5, wherein all the means attaching the flexible strap to the supporting surface are adjustable.11. A cable installation as claimed in any one of the preceding Claims comprising at least one sub-group of cables, wherein the cables of the or each sub-group of cables are of substantially the same diameter as one another and are arranged with their axes lying in a substantially common plane which is parallel to the supporting surface or in a substantially common plane which is perpendicular to the supporting surface.12. A cable installation as claimed in any one of the preceding Claims, wherein the flexible strap is made of metal or metal alloy.13. A cable installation as claimed in any one of Claims 1 to 11, wherein the flexible strap is made wholly of plastics material.14. A cable installation as claimed in any one of Claims 1 to 11, wherein the flexible strap is made of plastics coated metal or metal alloy.15. A cable installation as claimed in any one of Claims 12 to 14, wherein the flexible strap is pre-perforated.16. A cable installation as claimed in Claim 14, wherein the metal or metal alloy is pre-perforated and the plastics coating is unperforated, the plastics material of the coating having been punched out as and where required.17. A kit of parts for securing a group of cables, arranged side-by-side to a supporting surface, which kit comprises at least one length of flexible strap for adjustably attach- ing the strap or straps to the supporting surface, a plurality of nuts and bolts, that part of the head of each bolt or of each nut or of a separate washer to be carried by a bolt which will be in contact with the strap when the strap is tightened over a group of cables being so shaped that the strap will follow a smoothly curved path, and integral with or connected to at least one end of the or each strap a hook or other device for detachably engaging in an aperture or slot in a supporting surface.18. A kit of parts substantially as hereinbefore described with reference to and as shown in the Figures 1 to 5 of the accompanying drawings.19. A cable installation substantially as hereinbefore described with reference to and as shown in Figure 1 of the accompanying drawings.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB14158/78A GB1579904A (en) | 1978-04-11 | 1978-04-11 | Electric cable installations and securing means therefor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB14158/78A GB1579904A (en) | 1978-04-11 | 1978-04-11 | Electric cable installations and securing means therefor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1579904A true GB1579904A (en) | 1980-11-26 |
Family
ID=10036063
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB14158/78A Expired GB1579904A (en) | 1978-04-11 | 1978-04-11 | Electric cable installations and securing means therefor |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB1579904A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4770378A (en) * | 1987-11-06 | 1988-09-13 | Yoshio Onishi | Device for fixing conduits to saddles |
| EP2562877A1 (en) * | 2011-08-26 | 2013-02-27 | ABB Oy | Wire clamping assembly comprising a support body, a strip and a screw |
| CN104836170A (en) * | 2015-05-20 | 2015-08-12 | 国家电网公司 | Control cable buckle fixing device |
| CN110912040A (en) * | 2019-12-22 | 2020-03-24 | 陈必祥 | Universal porcelain clamp for cable laying |
| CN110994487A (en) * | 2019-12-22 | 2020-04-10 | 陈必祥 | Porcelain clamp for cable laying |
-
1978
- 1978-04-11 GB GB14158/78A patent/GB1579904A/en not_active Expired
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4770378A (en) * | 1987-11-06 | 1988-09-13 | Yoshio Onishi | Device for fixing conduits to saddles |
| EP2562877A1 (en) * | 2011-08-26 | 2013-02-27 | ABB Oy | Wire clamping assembly comprising a support body, a strip and a screw |
| CN102956995A (en) * | 2011-08-26 | 2013-03-06 | Abb公司 | Wire clamping assembly |
| CN102956995B (en) * | 2011-08-26 | 2015-07-15 | Abb公司 | Wire clamping assembly |
| US9270034B2 (en) | 2011-08-26 | 2016-02-23 | Abb Technology Oy | Wire clamping assembly |
| CN104836170A (en) * | 2015-05-20 | 2015-08-12 | 国家电网公司 | Control cable buckle fixing device |
| CN104836170B (en) * | 2015-05-20 | 2017-06-23 | 国网山东省电力公司昌邑市供电公司 | Control cable fixed device for clip |
| CN110912040A (en) * | 2019-12-22 | 2020-03-24 | 陈必祥 | Universal porcelain clamp for cable laying |
| CN110994487A (en) * | 2019-12-22 | 2020-04-10 | 陈必祥 | Porcelain clamp for cable laying |
| CN110994487B (en) * | 2019-12-22 | 2021-04-23 | 山西宏伟机电设备安装股份有限公司 | Porcelain clamp for cable laying |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PS | Patent sealed | ||
| PCNP | Patent ceased through non-payment of renewal fee |