GB2620851A

GB2620851A - Apparatus for storing cable

Info

Publication number: GB2620851A
Application number: GB2310935.8A
Authority: GB
Inventors: Alan Kershaw Richard
Original assignee: Alker Fibre Optic Specialists Ltd
Current assignee: Alker Fibre Optic Specialists Ltd
Priority date: 2022-11-04
Filing date: 2023-07-17
Publication date: 2024-01-24
Also published as: GB202310935D0

Abstract

An apparatus 202 comprising a drum 204 configured to receive a kit housing (6, Fig. 2) wherein the drum comprises at least one engagement member extending from an end of the drum. The drum is supported by a frame 222 mounted by an engagement assembly 224 and configured to engage with the at least one engagement member thereby allowing rotation of the drum relative to the frame. The drum may store cable (70, Fig 6A). The engagement member may be annular and spaced from a drum axis 205. The drum may comprise a body having one or more flanges (16, Fig. 1), an internal chamber 208, an outer compartment (20, Fig. 1), and a moveable closure (214, Fig. 13). The drum may extend along the drum axis. The frame may comprise one or more voids 218 and one or more telescopic segments extendable in direction transverse to the drum axis. The at least one engagement member may comprise at least one annular rim 221 having a longitudinal track and a lip (234, Fig. 12B) to engage with the engagement assembly having a plurality of rollers (27, Fig. 1).

Description

Intellectual Property Office Application No G132310935.8 RTM Date -14 December 2023 The following terms are registered trade marks and should be read as such wherever they occur in this document: Styrofoam Intellectual Property Office is an operating name of the Patent Office www.gov.uk/ipo

APPARATUS FOR STORING CABLE

The disclosure relates to apparatus for storing cable, splicing fibre optic cable and an associated method for splicing the fibre optic cable.

In the field of fibre optic cables, there are several known methods of splicing two fibre optic cables, for example when repairing a broken fibre optic cable or for joining two lengths of cable.

However, known methods suffer a variety of drawbacks. For example, a large variety of different tools and other equipment are typically required, often carried in a number of bulky and cumbersome carry cases that vary in size and weight. In some cases, it is also necessary to use a work bench in order to operate the various tools and equipment properly.

Further, some methods may require the use of power tools to prepare the fibre optic cables in a suitably precise manner. Therefore, as well as ensuring all the necessary tools and equipment are on site, a reliable power supply must also be available in order to splice fibre optic cables.

In some methods, the fibre optic cables are spliced by fusing them together. This requires applications of high temperature using an electrical arc fusion splicer, for example.

These requirements mean that fibre optic splicing is very difficult, if not impracticable, to carry out 'in the field' at the location the splice is ultimately required. This drawback is exacerbated when the fibre optic cable is deployed in a particularly remote and/or hazardous location, such as during a military operation or within a mining or constructions site. Accordingly, if a fibre optic cable deployed in a remote and/or hazardous location requires repair, it may typically gathered in to a base site which is supplied with the tools, work bench and/or power that might be required. Once repaired, the fibre optic cable can be redeployed. However, this is a time consuming operation.

It is an object to provide a user, including those who are not particularly skilled, with the capability to splice fibre optic cables in the field. For example, the user would be able to repair a broken fibre optic cable at the location of the break, without needing to gather and then re-deploy the fibre optic cable.

According to a first aspect of the present disclosure, there is provided an apparatus for storing a fibre optic cable, comprising: a drum about which fibre optic cable is reel-able, the drum configured to receive a kit housing; at least one annular rim extending from an end of the drum; a frame for supporting the drum; and an engagement assembly mounted to the frame, wherein the engagement assembly is configured to engage with the at least one annular rim and allow rotation of the drum relative to the frame.

According to another aspect of the disclosure, there is provided an apparatus comprising: a drum for storing cable, at least one engagement member spaced apart from the drum axis; a frame for supporting the drum; and an engagement assembly configured to engage with the at least one annular engagement member to allow rotation of the drum relative to the frame.

According to another aspect of the disclosure, there is provided an apparatus comprising: a drum for storing cable, wherein the drum is configured to receive a kit housing; at least one engagement member spaced apart from the drum axis and extending from an end of the drum; a frame for supporting the drum; and an engagement assembly mounted to the frame, wherein the engagement assembly is configured to engage with the at least one annular engagement member and allow rotation of the drum relative to the frame.

The following features may be provided in combination with the above aspects, Or indeed with embodiments described elsewhere herein.

Fibre optic cable being reel-able about the drum may mean that the drum is configured to have a cable wrapped around it. A drum that is suitable for storing cable may be used to store electrical or fibre optic cable, for example, or may also be suitable for storing piping or hosing.

The drum may extend along a drum axis. The at least one engagement member may comprise an annular rim. The annular rim may be spaced apart from the drum axis. The engagement assembly may be configured to engage with the at least one annular rim. The engagement assembly may be configured to allow rotation of the at least one annular rim and drum. Such rotation may be about the drum axis.

In one example, the engagement assembly may comprise a plurality of rollers. Each roller may be rotatably mounted to the frame. In an alternative example, the at least one engagement member comprises a plurality of rollers, and the engagement assembly comprises an annular rim. In either case, each roller may be rotatably engaged with the annular rim, preferably whereby the drum is rotatably mounted, non-axially, to the frame via the plurality of rollers.

The annular rim may comprise an inner surface and an opposing outer surface.

The at least one annular rim may comprise a longitudinal track and a lip extending radially inwardly and outwardly from each end of the longitudinal track to provide an inner channel and an outer channel. The inner and outer channels each may be configured to receive one or more rollers.

The at least one annular rim may comprises a first annular rim extending from a first end of the drum and a second annular rim extending from a second end of the drum.

The drum may comprise a drum body and one or more flanges extending radially from the drum body. The one or more flanges may comprise a flange at an end of the drum.

The at least one annular rim may extend from the flange at the end of the drum.

The drum may comprise an internal chamber configured to receive a kit housing. The drum may form part of a reel. The reel may further comprise a closure movable between an open position, allowing access to the internal chamber, and a closed position, allowing a kit housing to be secured inside the drum. The reel may further comprise an outer compartment. The outer compartment may extend axially from the drum. The outer compartment may have a larger diameter than the drum.

The frame may comprise one or more weight-saving voids. The frame may comprise one or more telescopically extendable segments. The one or more telescopically extendable segments may be configured to extend in a direction that is transverse to a direction of the drum axis.

According to another aspect of the disclosure, there is provided a backpack comprising: a drum for storing cable, wherein the drum is configured to receive a kit housing, at least one engagement member spaced apart from the drum axis and extending from an end of the drum; a frame for supporting the drum; an engagement assembly for mounting to the frame, wherein the engagement assembly is configured to engage with the at least one annular engagement member and allow rotation of the drum relative to the frame; and a backpack harness comprising means for retaining the frame, the drum and/or the engagement assembly.

Also disclosed is an apparatus for storing a fibre optic cable, comprising: a drum about which fibre optic cable is reel-able; and a kit housing configured to hold one or more items of a fibre optic cable engineering kit, wherein the drum is configured to receive the kit housing.

In one or more embodiments, the drum is configured to receive the kit housing in an axial direction.

In one or more embodiments, the drum comprises an internal chamber configured to receive the kit housing.

In one or more embodiments, an aperture of the internal chamber has substantially the same cross section as the kit housing such that the kit housing slots into the internal chamber.

In one or more embodiments, the internal chamber and the kit housing are both substantially cylindrical in shape.

In one or more embodiments, the kit housing has an open configuration. The one or more items may be insertable in and/or removable from the kit housing in the open configuration. The kit housing may have a closed configuration. Contents of the kit housing may be secured in the closed configuration.

In one or more embodiments, the kit housing comprises a work surface accessible when the kit housing is in the open configuration.

In one or more embodiments, the kit housing comprises at least two segments, each segment comprising one or more pockets, each pocket configured to securely hold a component of the kit.

In one or more embodiments, the kit housing comprises an engineering kit comprising one or more of: a wire cutter, a Kevlar® cutter, a fibre stripper, a peg stripper, a crimper, a jig, and a cleaver.

In one or more embodiments, the drum forms part of a reel.

In one or more embodiments, the reel comprises a closure movable between an open position and a closed position. The open position may allow access to the internal chamber. The closed position may allow the kit housing to be secured inside the drum.

In one or more embodiments, the reel comprises one or more flanges. The one or more flanges may extend radially from the drum to support fibre optic cable reeled about the drum.

In one or more embodiments, at least one flange comprises one or more weight-saving 20 voids.

In one or more embodiments, the reel further comprises an outer compartment. The outer compartment may extend axially from the drum. The outer compartment may have a larger diameter than the drum.

In one or more embodiments, the reel comprises a first end and a second end. The apparatus may comprise a frame. The frame may comprise a pivot on which the first end of the reel is rotatably mounted.

In one or more embodiments, the frame further comprises a reel support. The reel support may be coupled to the base. The reel support may be engageable with the second end of the reel. The reel support may comprise one or more rollers. Each roller may be rotatable relative to the frame and/or rotatably engaged with the reel.

In one or more embodiments the outer compartment comprises a rim engageable with the one or more rollers.

In one or more embodiments, the frame comprises a stacking support configured to engage with a frame of another cable repair apparatus and thereby enable secure stacking of a plurality of cable repair apparatus.

Also disclosed is an apparatus for storing a fibre optic cable, comprising a drum about which fibre optic cable is reel-able. The drum may comprise a kit housing configured to hold one or more items of a fibre optic cable engineering kit.

It will be appreciated that similar kits may be provided in cable reels for other types of cable.

There is also provided a brace for mechanically splicing a fibre optic cable, comprising: a connector support configured to hold one or more mechanical splice connectors; a pair of cable grips spaced a predetermined distance apart from one another, each cable grip configured to hold a respective fibre optic cable; and a pair of arms, wherein each arm extends from a respective end of the connector support to a respective cable grip and is more bendable than the connector support.

In one or more embodiments, the bendable arms are resiliently bendable.

In one or more embodiments, the connector support is non-bendable, preferably in a transverse direction.

In one or more embodiments, the connector support, pair of arms and pair of cable grips are integrally formed.

In one or more embodiments, each cable grip is configured to hold the respective fibre optic cables via a sheathing terminal, such as a crimp.

There is also provided a rig for mechanically splicing a fibre optic cable, comprising: a brace according to an embodiment described above; and a pair of sheathing terminals, each sheathing terminal engageable with a respective partially stripped fibre optic cable.

In one or more embodiments, each sheathing terminal is configured to allow passage of at least one fibre of the partially stripped fibre optic cable therethrough and is simultaneously attachable to sheathing of the partially stripped fibre optic cable.

In one or more embodiments further comprising one or more mechanical splice connectors.

In one or more embodiments further comprising a tube configured to receive the brace, the pair of sheathing terminals and one or more mechanical splice connectors.

In one or more embodiments the tube is bendable.

In one or more embodiments the tube is more bendable, or flexible, than the connector support.

In one or more embodiments the tube is axially non-extendable and non-compressible.

In one or more embodiments the tube is armoured.

In one or more embodiments further comprising a pair of glands, each gland configured to attach a respective end of the tube to a respective sheathing terminal.

In one or more embodiments each gland is configurable to provide a waterproof seal between the tube and a respective fibre optic cable.

Also disclosed is a device for mechanically splicing a fibre optic cable, comprising: a pair of cable grips spaced apart from one another, each cable grip configured to hold a respective fibre optic cable; and a spacer extending between the pair of cable grips, wherein the spacer is at least partially bendable. The spacer may comprise a connector support configured to hold one or more mechanical splices. The spacer may comprise a pair of bendable arms, each arm extending from a respective end of the connector support to a respective cable grip.

Also provided is a method for splicing two fibre optic cables, wherein each fibre optic cable comprises a sheathing and at least one fibre extending therethrough, the method comprising: stripping the sheathing from an end portion of each fibre optic cable; fitting a sheathing terminal to each fibre optic cable so that the terminal engages with an end of the sheathing and the fibre extends through the sheathing terminal; using a brace to position the sheathing terminals a predetermined distance apart from one another so that the respective fibres extend towards one another, wherein the brace is at least partially bendable; inserting each fibre into at least one mechanical splice connector and positioning the at least one mechanical splice connector in a non-bendable connector support of the brace; and actuating the at least one mechanical splice connectors while held in the brace to mechanically splice the fibres.

In one or more embodiments, prior to stripping the sheathing from an end portion of each fibre optic cable, the method further comprises trimming an end of each fibre optic cable.

In one or more embodiments, prior to inserting each fibre into a mechanical splice connector, the method further comprises stripping each fibre to reveal bare fibre.

In one or more embodiments, the method further comprises cleaning each fibre prior to inserting each fibre into a mechanical splice connector.

In one or more embodiments, the method further comprises, prior to inserting each fibre into a mechanical splice connector, for each fibre optic cable: placing the end portion of the fibre optic cable into a cleaving jig; and cleaving the fibre so that it extends a predetermined length from the sheathing terminal.

In one or more embodiments, the method further comprises: sliding a tube over one of the fibre optic cables, at least before using the brace to position the sheathing terminals a fixed distance apart from one another; and once the fibres are mechanically spliced, sheathing the brace and mechanical splice connector with the tube.

In one or more embodiments, the method further comprises fixing each end of the tube to a respective one of the sheathing terminals.

In one or more embodiments, the method further comprises generating a seal between each end of the tube and a respective one of the fibre optic cables.

In one or more embodiments, each fibre optic cable further comprises a Kevlar® layer surrounding the fibre and the method further comprises, after fitting a sheathing terminal to each fibre optic cable, trimming the Kevlar0 layer down to the sheathing terminal.

In one or more embodiments, each fibre optic cable further comprises an armour cladding surrounding the fibre and the method further comprises, after stripping the sheathing from an end portion of each fibre optic cable, stripping the armour cladding from the fibre.

In one or more embodiments: each fibre optic cable comprises two or more fibres; each fibre of each fibre optic cable is inserted into a corresponding mechanical splice connector so that each mechanical splice connector receives a pair of fibres, one from each fibre optic cable; and each mechanical splice connector is actuated to splice the respective pair of fibres.

Also disclosed is a method for splicing two fibre optic cables, wherein each fibre optic cable comprises a sheathing and a fibre extending therethrough, the method comprising: sliding a tube over one of the fibre optic cables; stripping the sheathing from an end portion of each fibre optic cable; fitting a sheathing terminal to each fibre optic cable so that the terminal engages with an end of the sheathing and the fibre extends through the sheathing terminal; using a brace to position the sheathing terminals a predetermined distance apart from one another so that the respective fibres extend towards one another; inserting each fibre into a mechanical splice connector; actuating the mechanical splice connector to mechanically splice the fibres; and covering the brace and the mechanical splice connector with a tube.

Embodiments of the present invention will now be described by way of example and with reference to the accompanying drawings in which: Figure 1 schematically illustrates an apparatus for storing a fibre optic cable; Figure 2 schematically illustrates a kit housing for holding one or more items of a fibre optic cable engineering kit; Figures 3 and 4 show the kit housing of Figure 2 holding items of a fibre optic cable engineering kit; Figures 5A-I show items of the fibre optic cable engineering kit of Figures 3 and 4; Figures 53 and 5K show alternative items that may replace the items shown in Figures 5B and 5E, respectively, in some embodiments; Figure 6A schematically illustrates a fibre optic cable; and Figure 6B schematically illustrates a duplex fibre optic cable; Figures 7A and 7B show disassembled views of a rig for mechanically splicing a fibre optic cable; Figure 8 schematically illustrates the rig of Figures 7A and 75 when assembled; Figure 9 shows a close-up view of a brace forming part of the rig shown of Figures 7A to 8; Figure 10 illustrates a flow diagram for a method of splicing a fibre optic cable; Figure 11 schematically illustrates another apparatus for storing a fibre optic cable; Figure 12A schematically illustrates a cross-section of a drum forming part of the apparatus of Figure 11, and Figure 12B shows a close-up view of the drum; Figure 13 schematically illustrates the apparatus of Figure 11 from a different perspective; and Figure 14 schematically illustrates a frame forming part of the apparatus of Figures 11 and 13.

Figure 1 shows an apparatus 2 according to an aspect of the invention. The apparatus 2 comprises a reel 10 including a drum 4 and flanges 16 provided at opposing first and second ends 11, 12 of the reel 10. The apparatus 2 is suitable for storing a fibre optic cable (not shown) by coiling the fibre optic cable about the drum 4 between the flanges 16. The flanges 16 extend radially from the drum 4 to support fibre optic cable reeled about the drum 4, and act as a guide for the removal or addition of fibre optic cable to or from the drum 4. In this example, the flanges 16 each comprise a plurality of weight-saving voids 18; sections in which material are omitted without affecting the guide function of the flange 16.

The apparatus 2 is suitable for storing a kit housing (not visible in Figure 1 and discussed further below with reference to Figures 2 to 4) configured to hold one or more items of a fibre optic cable engineering kit. In particular, the apparatus 2 comprises an internal chamber (not shown) which is configured to receive the kit housing in an axial direction. In one example, the drum 4 can have a hollow section approximately 197 mm inner diameter and 353 mm long, in the axial direction. An aperture of the internal chamber may have substantially the same cross section as the kit housing such that the kit housing slots into the internal chamber.

The apparatus 2 therefore facilitates a user to carry both a fibre optic cable and a fibre optic cable engineering kit for working on the cable as a single, portable and compact assembly. This means that the fibre optic cable engineering kit located is available for use exactly where cable damage has occurred or new cable needs to be installed, for example. The mobility of fibre optic cable engineering kit can also allow a user to carry out various inspections/tests along the length of a fibre optic cable while it is in situ.

This contrasts known kits for installing, repairing or inspecting fibre optic cables which require many parts, equipment and a supply of power causing repairs and other similar tasks normally to be performed at a base rather than in the field.

The reel 10 comprises a closure 14 movable between a closed position (shown in Figure 1), allowing the kit housing to be secured inside the drum, and an open position (not shown), allowing access to the internal chamber. The closure 14 provides a door for allowing access to the engineering kit, thereby allowing the kit to remain isolated and clean when not in use. In particular, the door in this example is hingedly attached to the first end 12 of the reel 10.

In this example, the first end 12 of the reel 10 comprises an outer compartment 20 which extends axially from the drum 4. The compartment also has a larger diameter than the drum 4 such that the compartment extends radially from the drum 4, similarly to the flanges 16. The outer compartment 20 may act as an additional guide for the removal or addition of fibre optic cable to or from the drum 4. The outer compartment 20 may also provide additional storage space for storing tools and the like. In this example, the closure 14 extends across the outer compartment 20 as well as the drum 4.

In this example, the apparatus 2 further comprises a reel support 26 on which the reel 10 is mounted. The reel support 26 comprises a beam 28 on which the reel 10 is rotatably mounted at the second end 12 of the reel 10. The beam 28 provides a back support and may comprise bearings (not shown) for mounting the reel 10 which act as an axle or pivot for the reel 10 to rotate about. A frame 22 is joined to the beam 28.

A brake to hold the reel 10 from moving may be positioned within the back support. The brake may also be used to regulate the speed of the cable when unwrapping.

The frame 22 extends around the reel 10 in order to prevent the reel 10 from contacting adjacent objects. The frame 22 provides a carrying handle 31. In this example, the carrying handle 31 is provided on top, when in normal use, and is balanced by being positioned above the centre of weight of the apparatus 2. In addition, stacking support members 29, in the form of clips or "U" shaped-lugs, are provided on an end of the frame 22 to allow the frame 22 of one apparatus 2 to be connected to a corresponding frame of another apparatus. In this way, the apparatus 2 can be stacked. The reel support 26 is also provided with a roller 27 that is configured to be placed as a supporting member for the reel 10 when in use. In the illustrated example, the roller 27 is rotatably engaged with a rim 21 of the outer compartment 20. That is, the outer compartment 20 provides a track for the wheel of the roller 27 to roll along. The barring positioned at back support and balancing wheel with tyre at the front even up the weight distribution, which may reduce or remove the need for another barring positioned at the front (first end 11). The provision of the roller 27 may reduce the wear and rolling resistance of the coupling between the reel 10 and the beam 28 of the reel support 26. Alternatively, the roller may be made to engage with a rim of a flange of the reel 10.

In other examples, the reel support may provide a plurality of rollers to support the reel 10. Three or more rollers spaced around the circumference of the reel may provide support for the first end 11 of the reel 10 when the apparatus is in any orientation.

The second flange 16 in from the back (second end 12) has two cut outs 19 (only partially shown in Figure 1) near the centre and is designed to enable both cable ends to transfer from the main cable area to the outer section and into the outer compartment 20. This allows the cable ends to be protected while also easily accessible.

Figure 2 schematically illustrates a kit housing 6 for holding one or more items of a fibre optic cable engineering kit. The kit housing 6 is formed of a plurality of parts that may be placed or secured together to hold the engineering kit. The kit housing 6 may be configured to have a corresponding shape with an internal chamber of an apparatus such as the apparatus 2 described previously with respect to Figure 1. For example, the internal chamber may define a cylindrical void and the kit housing 6 may be substantially cylindrical, for example.

In the illustrated example, the kit housing 6 is formed of Styrofoam in order to reduce weight and readily provide a form for holding items of kit.

The fibre optic cable engineering kit may be a kit for repairing fibre optic cable. Alternatively, the kit may be for commissioning a new fibre optic cable or inspecting/testing an existing fibre optic cable, for example. The applicability of the kit depends on the components of the kit selected for a particular task. In the described examples, it is intended that the tools or other apparatus held within the kit are intended for use with the fibre optic cables stored on the reel. In this way, by providing the engineering kit and the reel in an integrated apparatus, the utility of the reel may be improved whilst avoiding the need for transporting numerous bulky apparatus or tool assemblies for working on the fibre optic cable.

Figures 3 and 4 show the kit housing 6 of Figure 2 holding items of a fibre optic cable engineering kit 30. Figures 5A to 51 further illustrate the items of the fibre optic cable engineering kit of Figures 3 and 4.

The kit housing 6 comprises first and second outer sections and a middle section that when placed together are configured to be inserted into the internal chamber of the apparatus describes previously with reference to Figure 1. The three sections of foam are pre-cut for the required hand tools of the engineering kit. The three sections are designed to be laid together and then strapped together and held by a hook and loop fastener. A material handle (not shown), for example in the form of a fitted bag or sack, may be wrapped around the centre of the three sections of foam to assist the removal of the kit from the drum centre.

We will be doubling up on the use of the foam by using it as a table to work from with measurements to perform the repair and jigs embedded to assist this process.

In addition, a segment of the kit housing 6 may be arranged to provide a work surface or jig 62 that is accessible when the segments are separated. The jig 62 may assist in guiding the use of tools or holding one or more fibre optic cables when the kit is in use.

In this example, the fibre optic cable engineering kit 30 further comprises a wire cutter 31 (Figure 5A), a fibre stripper 32 (Figure 5B, a peg stripper 33 (Figure 5C), file 34 (Figure 5D), a crimper 35 (Figure 5E), a Kevlar® cutter 36 (Figure 5F), a cleaver 37 (Figure 5G), a pen 38 (Figure 5H) and cleaning wipes 39 (Figure 51).

In another example, the fibre stripper 32 may be replaced with a different type of fibre stripper 132 that is shown in Figure 51 In a further example, the file 34 may be replaced with flat nose pliers 134 that are shown in Figure 5K.

The fibre optic cable engineering kit 30 further comprises a partially assembled splint rig 60 and the work surface 62.

The fibre optic cable engineering kit 30 may be used to perform a repair function on a fibre optic cable. Figure 6A illustrates a first fibre optic cable 70. The fibre optic cable 70 comprises an outer jacker or sheathing 72 which surrounds a layer of Kevlar armour 74 within the Kevlar armour 74 is provided an optional cladding 76 which surrounds a core of a fibre optic fibre 78.

Figure 6B illustrates another fibre optic cable 170. The fibre optic cable 170 of Figure 6B differs from that described previously with respect to Figure 6A in that the fibre optic cable 170 comprises a plurality of fibres 178. Each fibre is surrounded by its own layer of cladding 176 provided within the Kevlar 74. In this example, the fibre optic cable 170 comprises two fibres 178 and may be referred to as a duplex fibre optic cable.

Figure 7A illustrates an isometric perspective view of a fibre optic rig 60. Figure 7B illustrates a planer view of the fibre optic rig 60.

The components of the fibre optic rig 60 are described in detail below with respect to Figure 7A, 7B, 8 and 9 before their operation is described.

The rig 60 is shown in exploded form in Figure 7A and 7B. The rig 60 comprises inner parts and outer parts. The outer parts include an outer tube 62 and end glands 64. A number of inner components are provided within the tube 62 when in use.

The inner components include a chassis or brace 50 with various terminal components 67, 68 for engaging with the glands 64.

The brace 50 provides a support for one or more mechanically spliced fibres in a fibre optic cable, such as the dual core/duplex cable described previously with reference to Figure 6B. The brace 50 includes a connector support 52 configured to hold one or more mechanical splice connectors 58. In this example, the connector support 52 is dimension to hold and protect two mechanical splice connectors 58 side-by-side. The brace 50 can also be used to assist in the mechanical splicing of a fibre optic cable having two cores. In other examples, the connector support can be dimensioned to hold just one mechanical splice connector or more than two mechanical splice connectors.

In addition to the connector support 52, the brace 50 comprises a pair of cable grips 54 that are spaced a predetermined distance apart from one another. Each cable grip 54 is configured to hold a respective fibre optic cable. A pair of arms extend from respective ends of the arms 56 to respective cable grips 54. The arms 56 are more bendable or flexible than the connector support 52 so that the connector support 52 may perform its task of holding firm the one or more mechanical splice connectors 58 whilst the arms may bend or flex so that the device as a whole is able to conform to the circumference of a drum, such as the drum of the reel described previously with reference to Figure 1.

The inner components also comprise a terminal case 67 and terminal insert 68 at each end. The terminal case 67 and terminal insert 68 are configured to engage, on an inner face, with the fibre optic cable to act as a terminator for the outer sheath 72 of the cable, and on an outer face to engage with the respective glands 64 of the outer components of the rig 60. Each gland 64 may engage with the tube 62 to secure the inner components within the outer components. In the illustrated example, a screw thread is provided on an inner surface at the ends of the tube 62 to engage with a corresponding screw thread provided on each gland 64. In a similar manner to the arms 56 of the brace 50, the tube 62 may be bendable so that the rig 60 can conform to the curvature of the reel.

Figure 8 illustrates the rig 60 when assembled with the glands 64 engaged with ends of the tube 62.

Figure 9 provides a further illustration of the brace 50 described with reference to Figures 7A and 7B.

Figure 10 illustrates a method 100 of splicing two fibre optic cables, which may be performed using the engineering kit described with reference to Figures 3 to 5. A single broken fibre optic cable is to be considered as two fibre optic cables separated by the break. Similarly, once the splice is complete, the spliced cable may still be considered to be two distinct fibre optic cables joined by a splice, rather than as one cable.

The method 100 of Figure 10 is described below with reference to the non-limiting example tools described with reference to Figures 5A-5K, first and second fibre optic cables 170 with reference to Figure 6B and the rig 60 described with reference to Figures 7A and 7B.

The method 100 comprises the steps of: Trimming 102 an end of each fibre optic cable 170 using wire cutters 31. Sliding 104 one gland 64 and the tube 62 over one fibre optic cable 170 and the other gland 64 over the other fibre optic cable 170.

For each cable 170: Stripping 106 sheathing 72 from an end portion of the cable 170 using peg strippers 33.

Separating 108 Kevlar® armour 74 from clad fibres 176, 178 and sliding a respective terminal case 67 over the fibres (trapping the Kevlar® armour 74 against the sheath 72).

Threading 110 the clad fibres 176, 178 through a terminal insert 68 and inserting the terminal insert 68 into the terminal case 67 until sheathing 72 is flush with an edge of the terminal insert 68. Steps 108 and 110 may be considered as fitting a sheathing terminal 66 to each fibre optic cable 170 so that the terminal engages with an end of the sheathing 72 and the fibres extend through the sheathing terminal 66. Trimming 112 the excess Kevlar® to terminal case 67 using the Kevlar® cutters.

For the first cable 170: Trimming 114 the clad fibres 176, 178 using the cleaver 37.

Stripping 116 the cladding 176 from each fibre 178 of the fibre optic cable using flat nose pliers 134 and fibre strippers 132 such that the cladding 176 extends a first predetermined length from the sheathing terminal 66.

Cleaning 118 each fibre 178 with a cleaning cloth 39.

Re-trimming 120 the fibres 178 using the cleaver 37 such that the fibres 178 extend a second predetermined length (longer than the first predetermined length) from the sheathing terminal 66.

Guiding 122 each fibre 178 into a respective mechanical splice connector 58 and positioning both the sheathing terminal 66 and mechanical splice connectors 58 within the brace 50, which may be held in a jig.

Repeating 123 steps 114 to 120 for the second cable 170.

For the second cable 170: Guiding 124 each fibre into a respective mechanical splice connector 58 until the fibre bottoms out and positioning the sheathing terminal 66 within the brace 50. (The mechanical splice connectors may require re-positioning.) The brace 50 is configured such that sheathing terminals 66 are spaced apart by a distance predetermined to cause each fibre to have a slight bend outside of the mechanical splice connector 58 due to opposing fibres pushing against each other within the mechanical splice connector 58. In practice, it may be the case that the opposing fibres 178 do not meet exactly centrally in the respective mechanical splice connector 58. If so, it may be necessary for a user to adjust the fibres slightly so that there are equal bends either side of the mechanical splice connector 58. No bare fibre 178 should be visible either side of the mechanical splice connector 58. That is, only the clad portion of the fibre 176 should be visible.

Actuating 126 each mechanical splice connector 58 to mechanically splice the fibres.

Sliding 128 the tube 62 over the brace 50. If a jig is used to hold the brace 50, the brace will need to be removed from the jig first.

Attaching 130 each gland 64 to a respective end of the tube 62 and tightening the glands to the cable sheathing. Once the tube 62 is resistant to tensile and compressive forces and therefore protects the mechanical splices. However, prior to the glands 64 being attached and tightened, the mechanical splices are still vulnerable and the brace 50 therefore provides a provisional level of protection to the mechanical splices, by keeping the two fibre optic cables 170 suitably spaced, until the outer parts of the rig 60 (the tube 62 and glands 64) are in place.

The method 100 does not require the use of any power tools, meaning that a power supply is not required in order to splice the optical fibres. The method is also easier for an untrained user to perform in that they do not need to understand how a particular power tool works in order to complete the process.

However, in some examples, powered pieces of equipment may be included in the fibre optic engineering kit, such as an insertion test set, for example.

The method 100 also does not require the use of a glue. This makes the process easier for an un-trained user to perform, even in the field, i.e., non-sterile and potentially unsheltered conditions. The method 100 can also be performed quickly. It is expected that a typical duplex fibre optic cable repair may be carried out in 10 to 15 minutes repair time whereas other methods known in the art typically take at least 30 minutes.

In other examples, step 122 may involve positioning both the sheathing terminal 66 and mechanical splice connectors 58 within a jig entirely separate to the brace 50. In such examples, the brace 50 may be attached to the fibre optic cables later, for example after actuating the mechanical splice connectors 58 and prior to sliding the tube 62 over.

The brace 50 or the jig referred to above may comprise guides or grooves to lay the fibres 176, 187 within to facilitate easier positioning of the fibres in the mechanical splice connectors. The brace 50 or the jig may further comprise a clamp to hold the fibres 176, 178 in the guides or grooves.

In practice, the method 100 may involve further steps that will be known and readily understood by a person skilled in the art. It is also to be understood that adaptions may be made to the method 100 so that it is suitable for fibre optic cable having just one fibre or more than two fibres.

Figure 11 shows an apparatus 202 according to an aspect of the invention. The apparatus 202 comprises a drum 204 about which fibre optic cable is reel-able, or can be wrapped, such as the fibre optic cables 70, 170 shown in Figures 6A and 65. The drum 204 is configured to receive a kit housing such as the kit housing 6 shown in Figure 2. The apparatus 202 further comprises an annular rim 221 extending from a first end 211 of the drum 204, a frame 222 for supporting the drum 204 and an engagement assembly 224 mounted to the frame 222. The engagement assembly 224 is configured to engage with the annular rim 221 and allow rotation of the annular rim 221 and drum 204 relative to the frame 222.

The drum 204 extends along a drum axis 205 and the annular rim 221 is spaced apart from the drum axis 205. More specifically, the annular rim 221 may be evenly spaced apart from the drum axis 205 such that the drum axis 205 passes through the centre of the annular rim 221.

The engagement assembly 224 is configured to engage with the annular rim 221 and allow rotation of the annular rim 221 and drum 204 about the drum axis 205. As the drum 204 is mounted to the frame 222 via the annular rim 221 and engagement assembly 224, a central portion of the drum 204 remains clear and unobstructed, as would be the case if a central pivot or axle were used to rotatably support the drum 204. This allows easy access to an internal chamber 208 within the drum 204 and may also allow the internal chamber 208 to be larger relative to the overall size of the drum 204 than would otherwise be the case because space is not occupied by a central pivot or axle.

In this example, the engagement assembly 224 comprises a plurality of rollers 227.

Each roller 227 is rotatably mounted to the frame 222 and rotatably engaged with the annular rim 221 whereby the drum 204 is rotatably mounted, non-axially, to the frame 222 via the plurality of rollers 227. Further, in this example, each roller 227 comprises a plastics material such as a nylon polymer or polyurethane to reduce sound generation as the rollers 227 roll against the annular rim 221. Meanwhile, the annular rim 221 comprise a metal material to provide the necessary strength for supporting the drum 204, its contents and cable wrapped around the drum 204. However, the annular rim may also be lined with a softer material, such as the plastics material (e.g. nylon polymer or polyurethane) to further reduce sound generation by rotation of the drum with respect to the frame.

In other embodiments, the engagement assembly may comprise alternative means for engaging with the annular rim while allowing rotation of the drum 204. For example, the arrangement of the plurality of rollers and the annular rim may be reversed such that rollers are coupled to the reel and an annular rim is mounted to the frame. Such an arrangement may allow for many more rollers to be introduced, resulting in greater spreading of the load transferred through the rollers. In another example, the rollers 227 may be replaced altogether with static projections formed from a low-friction material allowing the annular rim to slide through the projections so that the drum can rotate. In further examples, the annular rim may be coupled to the drum via a bearing assembly that allows free rotation of the drum relative to the annular rim, or a magnetic bearing assembly may be used to potentially eliminate friction completely.

Figure 12A shows a cross-section of the drum 204 shown in Figure 11 and Figure 12B particularly shows the rim 221 more clearly. In this embodiment, the annular rim 221 comprises an inner surface 231 and an opposing outer surface 232. More specifically, the annular rim 221 comprises a longitudinal track 233 and a lip 234 extending radially inwardly and outwardly from each end of the longitudinal track 233 to provide an inner channel and an outer channel configured to receive one or more rollers 227.

Referring back to Figure 11, the plurality of rollers 227 comprises at least one roller 227 receivable in each of the inner and outer channels and engageable with each of the inner and outer surfaces 231, 232 respectively. More generally, the plurality of rollers 227 are arranged so that the annular rim 221 is gripped or pinched by the rollers 227 to maintain the drum axis 205 in a stable position while also allowing the drum 204 to rotate about the drum axis 205.

Figure 12A also shows that the apparatus 202 comprises a rim 221 extending from a second end 212 of the drum 204 as well as having a rim extending from the first end 211 of the drum 204. Although not visible in Figure 11, the plurality of rollers 227 includes rollers configured to engage with the rim 221 extending from the second end 212 of the drum 204.

Providing an annular rim 221 and respective rollers 227 on both ends of the drum 204 enables more balanced support of the drum 204, reduces the loads that may be transmitted through any single roller 227 and also reduces wear of the rollers 227 and annular rim 221. However, in other embodiments, the apparatus 202 may comprise just a single annular rim and, as discussed previously with respect to figure 1.

Figure 13 shows the apparatus 202 of Figure 11 from a different perspective providing greater visibility of certain aspects, such as the second end 212 of the drum 204.

The second end of the drum a closure 214 movable between an open position, allowing access to the internal chamber 208, and a closed position (shown in Figure 13), allowing a kit housing to be secured inside the drum 204.

In some embodiments, the first end 211 of the drum 204 may additionally or alternatively comprise a similar closure movable between an open position and a closed position.

As shown in Figures 11, 12A and 13, the drum 204 comprises a drum body 207 and three flanges 216a-c extending radially from the drum body 207. Specifically, there is a flange 216a, 216c at each of the first and second ends 211, 212 of the drum 204 and a further flange 216b positioned between the two ends 211, 212 but closer to the first end 211.

Particularly visible in Figure 12A, each rim 221 extends from the flange 216a, 216c at the respective end 211, 212 of the drum 204.

The drum 204 forms part of a reel 210. In this embodiment, the reel 210 further comprises an outer compartment 220 that is positioned between two of the flanges 216a, 216b, extends axially from the drum 204 and has a larger diameter than the drum 204. The outer compartment 220 may act as an additional guide for the removal or addition of fibre optic cable to or from the drum 204. The outer compartment 220 may also provide additional storage space for storing tools and the like.

Visible in Figure 13, the middle flange 216b comprises a pair of flange apertures 217 that enable each end of a cable (and any end connector) wound around the drum body 207 to be threaded into the outer compartment 220. This allows each end of the cable to be separated from the rest of the cable so that the ends are more readily accessible and any connectors attached to the ends may be protected within the outer compartment. In other examples, there may be just one flange aperture 217 enabling just one end of a cable to be threaded into the outer compartment 220.

The outer compartment 220 also comprises a compartment aperture 219. The compartment aperture 219 allows one or both ends of a cable contained in the outer compartment 220 to exit the outer compartment 220 and, optionally, be wound around the outer compartment 220 between the outer flange 216a and the middle flange 216b. These arrangements can enable a small portion of cable to be wound more accessibly around the outer compartment 220 while the majority of the cable is wound more securely around the drum body 207.

Figure 14 shows the frame 222 more clearly. The frame comprises a plurality of weight-saving voids 218.

The frame 222 comprises slots 240 for receiving the engagement assembly 224. A retaining mechanism (not shown), such as a nut and bolt, may be used to secure the engagement assembly to the frame. The providing of substantially planar engagement assemblies 224 and frame 222 allow for compact storage and assists with transportation. For example, the frame 222 may be readily stored in or on a backpack for ease of transportation. A backpack may be provided with, or retrofitted with, a clasp, or similar attachment element, for holding the frame 222.

In other examples, the engagement assembly 224 and the frame may be formed of a unitary component.

Preferably, the frame 222 and portions of the engagement assembly 224 are constructed from carbon fibre, or a light weight alloy such as an aluminium or titanium alloy in order to provide sufficient strength. In other examples, the frame 222 and at least some of the engagement assembly 224 may be formed from other suitable materials, such as injection moulded plastics or composites, which has a particular advantage for this application in that it may provide the components with a suitable level of rigidity and weight, and at reduced cost.

The frame 222 may comprise an extendable mechanism, which may include one or more extendible elements. Preferably, the extendible elements are arranged to extend in a direction that is transverse or perpendicular to the drum axis 250. For example, a first extendible element may be configured to extend from one side of the drum axis and a second extendible element may be configured to extend in an opposing direction from the other side of the drum. In this way, the frame cross section can be extended when the apparatus is in situ to improve the stability of the reel when cable is being removed. Voids in the frame 222 may be provided housing a telescopically extendable mechanism. In other examples, the extendable elements may extend by a different (non-telescopic) means. For example, the extendable elements may extend and retract by way of a swivel bar or screw mechanism whereby twisting an element in one direction causes extension while twisting in the other direction causes retraction.

Claims

CLAIMS1. An apparatus comprising: a drum for storing cable, wherein the drum is configured to receive a kit housing; at least one engagement member spaced apart from the drum axis and extending from an end of the drum; a frame for supporting the drum; and an engagement assembly mounted to the frame, wherein the engagement assembly is configured to engage with the at least one annular engagement member and allow rotation of the drum relative to the frame.
2. A reel assembly according to claim 1, wherein the drum extends along a drum axis, the at least one engagement member comprises an annular rim and the engagement assembly is configured to engage with the at least one annular rim and allow rotation of the at least one annular rim and drum about the drum axis.
3. A reel assembly according to claim 1 or claim 2, wherein the engagement assembly comprises a plurality of rollers, each roller rotatably mounted to the frame and rotatably engaged with the annular rim whereby the drum is rotatably mounted, non-axially, to the frame via the plurality of rollers.
4. A reel assembly according to claim 3, wherein the annular rim comprises an inner surface and an opposing outer surface, and the plurality of rollers comprises at least one roller engageable with each of the inner and outer surfaces.
5. A reel assembly according to claim 3 or claim 4, wherein the at least one annular rim comprises a longitudinal track and a lip extending radially inwardly and outwardly from each end of the longitudinal track to provide an inner channel and an outer channel, the inner and outer channels each configured to receive one or more rollers.
6. A reel assembly according to any preceding claim, wherein the at least one engagement member comprises a first annular rim extending from a first end of the drum and a second annular rim extending from a second end of the drum.
7. A reel assembly according to any preceding claim, wherein the drum comprises a drum body and one or more flanges extending radially from the drum body.
8. A reel assembly according to claim 7, wherein the one or more flanges comprises a flange at an end of the drum and the at least one engagement member extends from the flange at the end of the drum.
9. A reel assembly according to any preceding claim, wherein the drum comprises an internal chamber configured to receive a kit housing.
10. A reel assembly according to any preceding claim, wherein the drum forms part of a reel.
11. A reel assembly according to claim 10, wherein the reel further comprises a closure movable between an open position, allowing access to the internal chamber, and a closed position, allowing a kit housing to be secured inside the drum.
12. A reel assembly according to claim 10 or claim 11, wherein the reel further comprises an outer compartment which extends axially from the drum and has a larger diameter than the drum.
13. A reel assembly according to any preceding claim, wherein the frame comprises one or more weight-saving voids.
14. A reel assembly according to any preceding claim, wherein the frame comprises one or more telescopically extendable segments.
15. A reel assembly according to claim 14, wherein the one or more telescopically extendable segments are configured to extend in a direction that is transverse to the drum axis.