Abstract:
A cable suspension may allow a cable to be pivoted about a pivot axis that passes through a thickness of a cable. A bend radius of the cable entering and exiting the cable suspension may be increased and/or the degree of bend by a cable entering and exiting the cable support may be decreased. The cable may comprise insulated electrical cables, non-insulated electrical cables (e.g., conductors), shielded cables, non-electrical signal cables (e.g., optical cables), and/or assemblies thereof.

Description:
REFERENCE TO RELATED APPLICATION 
       [0001]    This application claims priority to U.S. Provisional Application No. 61/760,616, titled “A CABLE SUSPENSION” and filed on Feb. 4, 2013, which is incorporated herein by reference. 
     
    
     TECHNICAL FIELD 
       [0002]    A cable suspension is disclosed to facilitate supporting cables from poles and towers. 
       BACKGROUND 
       [0003]    Suspension fittings of various configurations are known for supporting cables on and between poles and towers. Respective fittings are suspended from corresponding poles. A cable is supported by running continuously through each fitting and from fitting to fitting. A length of cable between adjacent suspension fittings (e.g. poles) is known as “a span.” 
         [0004]    A function of a suspension fitting is to mitigate the deleterious effects of static and dynamic loads on a supported cable. Cables are subjected to static loads arising from the effects of gravity and differentials in span lengths and/or misalignment of spans on opposite sides of the suspension. Dynamic loads may arise from the effects of wind, vibration, for example, from road traffic, and from animals such as birds, and in particular flocks of birds landing and alighting from suspended cables, or possums walking along the cables. These loads may cause the cable to move in a plane transverse or parallel to its length. Loads in the transverse plane may be termed as “swing” loads (and produce swing motion), while loads in the parallel plane may be termed as “sway” loads (and produce sway motion). 
       SUMMARY 
       [0005]    This summary is provided to introduce a selection of concepts in a simplified form that are further described below in the detailed description. This summary is not intended to identify key factors or essential features of the claimed subject matter, nor is it intended to be used to limit the scope of the claimed subject matter. 
         [0006]    The motion arising from static and dynamic loads may cause localized bending of the cable immediately adjacent to the opposite sides of the fitting. Ideally this angle should be the same on each side and thus produce a zero deviation angle. The deviation angle is the difference in bend angle on each side of the fitting. However, in practice, previous fittings, particularly when subjected to sway loads, are unable to produce a non-zero deviation angle. 
         [0007]    In broad terms in a first aspect there is disclosed a cable suspension which allows a cable to be pivoted about a pivot axis that passes through a thickness of a cable. The general idea here is to increase a bend radius of the cable entering and exiting the cable suspension, e.g. reducing the degree of bend by a cable entering and exiting the cable support. 
         [0008]    In the context of the present specification “cable” is intended to include but is not limited to insulated electrical cables, non-insulated electrical cables (also known in the art as “conductors’), shielded cables, non-electrical signal cables such as but not limited to optical cables, or assemblies thereof. The insulated or non-insulated electrical cables can include cables made from a single or multiple strands, and in the latter case, may be twisted or bundled together. Due to their physical characteristic, optical fibers are less robust than electrical cables and generally require greater protection or isolation from mechanical strain. It is not an essential requirement that the cable be used or indeed be capable of carrying electrical and/or optical power or signals. The cable may be in the form of a cable used to support a mechanical load, such as, for example, mechanical support cables on suspension bridges or from which electrical cables are suspended for electrified rail systems. 
         [0009]    The disclosed cable suspension may be more particularly arranged so that the pivot axis passes through or closely adjacent to a center line of a cable received in or supported by the cable suspension. 
         [0010]    In broad terms the cable suspension has a body configured to receive or seat a cable, and a bracket that is pivotally coupled to the body about the pivot axis. The bracket may be arranged to couple to a support, such as a pole or tower, at a location disposed above the pivot axis. This enables the cable suspension to be suspended, for example, from a hook that may be attached to a pole or tower. The bracket may be provided with a coupling mechanism to facilitate the coupling of the bracket to the support. The coupling can be arranged to enable the bracket and thus the body to move in a swing plane that lies parallel to the pivot axis. The coupling mechanism may also enable the bracket and thus the body to move in a sway plan that lies transverse to the pivot axis. 
         [0011]    The ability for the bracket to move in the swing plane and/or the sway plane provides the cabled suspension with multiple degrees of freedom of movement to assist in mitigating stress, strain, and fatigue in a cable. 
         [0012]    In a first aspect there is disclosed a cable suspension comprising: a body configured to receive a cable and a bracket pivotally coupled to the body about a pivot axis and arranged to couple to a support at a location above the pivot axis. The pivot axis is orientated to pass through a thickness of a cable received in the body. 
         [0013]    In an embodiment the pivot axis is orientated to intersect with or lie closely adjacent to a center line of a cable received in the body. 
         [0014]    In an embodiment the bracket is arranged to couple to the support in a manner to enable the body to move in a swing plane that lies parallel to the pivot axis. 
         [0015]    In the same or an alternate embodiment the bracket is arranged to couple to the support in a manner to enable the body to move in a sway plane that lies transverse to the pivot axis. 
         [0016]    In an embodiment the pivot axis lies in a transverse center plane of the body. 
         [0017]    In an embodiment the cable suspension comprises a damping system operatively coupled between the body and the bracket and arranged to dampen motion about the pivot axis. 
         [0018]    In an embodiment the damping system comprises at least one elastomeric member interposed between the body and the bracket. 
         [0019]    In an embodiment the body comprises a plurality of demountable parts configured to encircle, and couple together about, an outer circumferential surface of a cable. 
         [0020]    In an embodiment the bracket comprises a first coupling part. The first coupling part may comprise a loop structure such as but not limited to an annulus or ring arranged to facilitate articulated coupling of the body to the support. The articulated coupling enables the movement in the sway plane and swing plane. Moreover a second coupling part may be provided that is configured for engagement with the first coupling part. The second coupling part may be attached or attachable to the support. The second coupling part may comprise a hook. The hook may be attached or attachable to the support. The first and second coupling parts together may be considered as forming a mounting interface that enables an articulated coupling of the body with the support at a location above the pivot axis. 
         [0021]    In an embodiment the bracket forms first part of a mounting interface that enables an articulated coupling with a support. In this embodiment the mounting interface also comprises a second part that is either attached to the support or is attachable to the support, wherein the first and second parts are configured to be mutually engaged to facilitate articulation of the cable suspension on the support. In an example the first part comprises a closed loop structure and the second part comprises a hook. The closed loop structure may be in the form of an annulus or a ring at one end of the bracket. 
         [0022]    In an embodiment the bracket comprises two arms between which the body is located and wherein the pivot axis passes through the arms. 
         [0023]    In an embodiment the bracket comprises a cradle that extends across an underside of the body and wherein the pivot axis passes through the cradle. 
         [0024]    In a second aspect there is disclosed a cable suspension comprising: a body configured to receive a cable; a bracket pivotally coupled to the body about a pivot axis; and a mounting interface that enables an articulated coupling of the body with the support at a location above the pivot axis. The pivot axis is orientated to pass through a thickness of a cable received in the body. 
         [0025]    In an embodiment the mounting interface comprises a first coupling part and a second coupling part, the first coupling part being a part of or otherwise attached to the bracket and the second coupling part being attached to or attachable to the support wherein the first and second coupling parts are configured to be mutually engaged. 
         [0026]    In an example the first coupling part comprises a loop structure and the second coupling part comprises a hook. The loop structure may be in the form of an annulus or a ring at one end of the bracket. 
         [0027]    The following description and annexed drawings set forth certain illustrative aspects and implementations. These are indicative of but a few of the various ways in which one or more aspects may be employed. Other aspects, advantages, and novel features of the disclosure will become apparent from the following detailed description when considered in conjunction with the annexed drawings. 
     
    
     
       DESCRIPTION OF THE DRAWINGS 
         [0028]    Notwithstanding any other forms that may fall within the scope of the cable support as set forth in the Summary, specific embodiments will now be described, by way of example only, with reference to the accompanying drawings in which: 
           [0029]      FIG. 1 a    is a front elevation view of an embodiment of a cable suspension in an equilibrium state where loads acting on a cable supported by the cable suspension are balanced in (e.g., one or more and/or all) directions so that a bracket of the cable support lies in a substantially vertical plane and a body of the cable suspension lies in a substantially horizontal plane. 
           [0030]      FIG. 1 b    is a side elevation of the cable suspension illustrated in  FIG. 1   a.    
           [0031]      FIG. 1 c    is a plan view of the cable suspension illustrated in  FIGS. 1 a    and  1   b.    
           [0032]      FIG. 2 a    is an isometric exploded view of the cable suspension illustrated in  FIG. 1   a.    
           [0033]      FIG. 2 b    is a side elevation exploded view of the cable suspension show in  FIG. 1   a.    
           [0034]      FIG. 3 a    is a front elevation of the cable suspension illustrated in  FIG. 1 a    in an unbalanced state where the load applied by the cable on the right side of the cable suspension is greater than the load applied by the cable on the left side of the cable suspension, causing the body to sway in an anticlockwise direction in a sway plane that is generally coplanar with the cable spans. 
           [0035]      FIG. 3 b    is a side elevation of the cable suspension illustrated in  FIG. 3   a.    
           [0036]      FIG. 3 c    is a plan view of the cable suspension illustrated in  FIGS. 3 a    and  3   b.    
           [0037]      FIG. 4 a    is a front elevation of the cable suspension illustrated in  FIG. 1 a    in an unbalanced state where the load applied by the cable on the left side of the cable suspension is greater than the load applied by the cable on the right side of the cable suspension, causing the body to sway in an clockwise direction in a sway plane that is generally coplanar with the cable spans. 
           [0038]      FIG. 4 b    is a side elevation of the cable suspension illustrated in  FIG. 4   a.    
           [0039]      FIG. 4 c    is a plan view of the cable suspension illustrated in  FIGS. 4 a    and  4   b.    
           [0040]      FIG. 5 a    is a front elevation of the cable suspension illustrated in  FIG. 1 a    illustrating the effects of unbalanced loads in a sway plane, that is generally coplanar with the cable spans, and a swing plane, that is generally transverse to the cable spans. The net effect of the forces causes the cable suspension to swing away from a supporting structure and sway in a clockwise direction. 
           [0041]      FIG. 5 b    is a side elevation of the cable suspension illustrated in  FIG. 5   a.    
           [0042]      FIG. 5 c    is a plan view of the cable suspension illustrated in  FIGS. 5 a    and  5   b.    
           [0043]      FIG. 6 a    is a front elevation of the cable suspension illustrated in  FIG. 1 a    illustrating the effects of unbalanced loads in a sway plane, that is generally coplanar with the cable spans, and a swing plane, that is generally transverse to the cable spans. The net effect of the forces causes the cable suspension to swing away from a supporting structure and sway in an anticlockwise direction. 
           [0044]      FIG. 6 b    is a side elevation of the cable suspension illustrated in  FIG. 6   a.    
           [0045]      FIG. 6 c    is a plan view of the cable suspension illustrated in  FIGS. 6 a    and  6   b.    
           [0046]      FIG. 7  is a front elevation view of a cable suspended from cable suspensions that are mounted to three adjacent posts. There is a static load imbalance on the opposite sides of the cable suspension mounted to the middle post that causes the cable suspension to sway anticlockwise in a sway plane that is generally coplanar with the cable spans. 
           [0047]      FIG. 8 a    is a rear isometric view of an alternate embodiment of cable suspension comprising a U-shaped portion that extends over the top of the body with two arms that depend from a bridge to support the cable suspension body. One of the arms is hinged to allow a cable to be inserted into the body. 
           [0048]      FIG. 8 b    is a front isometric view of the cable suspension illustrated in  FIG. 8   a.    
           [0049]      FIG. 8 c    is a front elevation view of the cable suspension illustrated in  FIG. 8   a.    
           [0050]      FIG. 8 d    is a side elevation of the cable suspension illustrated in  FIG. 8   a.    
           [0051]      FIG. 8 e    is a rear elevation view of the cable suspension illustrated in  FIG. 8   a.    
           [0052]      FIG. 9 a    is a rear isometric view of the cable suspension illustrated in  FIG. 8 a    with the hinged arm displaced from the front of the body to facilitate insertion of a cable. 
           [0053]      FIG. 9 b    is a front isometric view of the cable suspension illustrated in  FIG. 8 a    with the hinged arm displaced from the front of the body to facilitate insertion of a cable. 
           [0054]      FIG. 9 c    is a front elevation view of the cable suspension illustrated in  FIG. 8 a    with the hinged arm displaced from the front of the body to facilitate insertion of a cable. 
           [0055]      FIG. 9 d    is a side elevation of the cable suspension illustrated in  FIG. 8 a    with the hinged arm displaced from the front of the body to facilitate insertion of a cable. 
           [0056]      FIG. 10 a    is a side elevation exploded view of the cable suspension show in  FIG. 8   a.    
           [0057]      FIG. 10 b    is an isometric exploded view of the cable suspension illustrated in  FIG. 8   a.    
       
    
    
     DETAILED DESCRIPTION 
       [0058]    The claimed subject matter is now described with reference to the drawings, wherein like reference numerals are generally used to refer to like elements throughout. In the following description, for purposes of explanation, numerous specific details are set forth in order to provide a thorough understanding of the claimed subject matter. It may be evident, however, that the claimed subject matter may be practiced without these specific details. In other instances, structures and devices are illustrated in block diagram form in order to facilitate describing the claimed subject matter. 
         [0059]      FIGS. 1 a -2 b    depict an embodiment of the cable suspension  10 . The cable suspension  10  comprises a body  12  configured to receive a cable  14  and a bracket  16  that is pivotally coupled to the body  12  about a pivot axis  18  and is further arranged to couple to a support at a location above the pivot axis  18 . The pivot axis  18  is orientated to pass through a thickness of the cable  14  received in the body  12 . As will be explained in greater detail below, this embodiment of the cable suspension  10  is able to maintain a portion of the cable  14  within the body  12  in a substantially horizontal plane under various static and dynamic load conditions that are expected or reasonably foreseeable and maintain a large bending radius of the cable  14  on opposite sides of the body  12  thereby limiting and/or decreasing the degree of bend in the cable  14 . 
         [0060]    In  FIGS. 1 a   - 2   b,  the cable suspension  10  is depicted in a substantially balanced or equilibrium load condition. In this condition the net of the static and dynamic loads and forces acting on the cable suspension  10  and received cable  14  are such that the bracket  16  hangs substantially like a plumb line so that a longitudinal center line C 1  of the bracket  16  lies in a vertical plane and is perpendicular to the horizontal plane. Further, a center line C 2  of a portion of the cable  14  received in the body  12  is held in a horizontal plane. Indeed, embodiments of the cable suspension  10  function in the manner to maintain the center line of the portion of the cable  14  within the body  12  in a horizontal plane in majority of foreseeable static and dynamic load conditions. As a result a bending radius of the cable  14  as it enters and exits the body  12  is enhanced and/or increased (e.g. the degree of bend of the cable  14  adjacent to the opposite ends of the body  12  is limited and/or decreased). 
         [0061]    In the present described embodiments the support comprises a pole or tower and/or support (see  FIG. 7 ). The coupling of the suspension  10  to the support is via a first coupling part  29 . The first coupling part  29  is formed as a part of, or is otherwise attached to, the bracket  16 . The coupling of the suspension  10  via the first coupling part  29  enables an articulated coupling of the suspension  10  to the support in a sway plane and a swing plane. These planes will be described shortly. The first coupling part  29  engages a complimentary second coupling part  21 . The second coupling part  21  is attached, or otherwise attachable, to the support. The parts  29  and  21  are configured to be mutually engaged to facilitate articulation of the cable suspension  10  on the support. 
         [0062]    The coupling part  29  is in the form of a loop structure of the bracket  16  and is exemplified in the Figures as an annulus (or ring or washer)  30 . The second coupling part  21  is exemplified in the Figures as a hook  22  having a straight shank  24  and a contiguous arcuate hook portion  26 . The hook  22  is attached so that the shank  24  extends perpendicular to the pole and in a substantially horizontal plane. Together the coupling parts  29  and  21  may be considered as constituting a mounting interface  31  that facilitates articulation of the body  12  and thus cable suspension  10  on the support. As explained below this articulation is manifested by a sway motion of the suspension  10  in a plane parallel to the general direction of the cable  14 , and a swing motion of the suspension in a general direction transverse to the direction of the cable. 
         [0063]    Looking at the components of the cable suspension  10  in greater detail and with particular reference to  FIGS. 2 a  and 2 b   , it will be seen that in this embodiment the bracket  16  comprises a cradle  32  attached to the coupling part  29 /annulus  30 . The annulus  30  has a central through-hole  34  defined by an inner circumferential surface  36 . The cradle  32  is formed with a ledge  38  to which an outer circumferential surface  40  of the annulus  30  is attached. This attachment may for example be achieved by welding. Alternately, the annulus  30  and cradle  32  may be integrally formed. Depending from the ledge  38  is a generally U-shaped portion  42  of the cradle  32 . The U-shaped portion  42  comprises a pair of parallel lugs or arms  44  which are spaced and attached to each other by an integrally formed bridge  46 . Mutually aligned threaded holes  48  are formed in the lugs  44 . A center line of the holes  48  coincides with the pivot axis  18 . Strengthening fillets or webs  50  and  52  are provided on an outside of the bracket  16  to assist in resisting distortion or other bending of the bracket  16 . 
         [0064]    The body  12  comprises a plurality of demountable parts including a first shell  54   a  and a second shell  54   b  (hereinafter referred to in general as “shells  54 ”). The shells  54  are configured to encircle and couple together about an outer circumferential surface of the cable  14 . Conceptually the shells  54  may be viewed as being formed by splitting the body  12  in a horizontal plane. The shell  54   a  is formed with a longitudinally extending channel  58  that seats the cable  14 . The channel  58  includes a central or intermediate portion  60  and contiguous opposite end portions  62 . A center line  60 L of the portion  60  is straight. However a center line  62 L of the end portion  62  is curved with increasing radius in a direction away from the central portion  60  to the distal ends of the body  12 . The curvature of the center line  62 L and corresponding end portions  62  may comprise a single fixed radius or a plurality of progressively increasing radii that form a substantially smooth curve. 
         [0065]    A central passage  64  is created in the body  12  when the shells  54  are coupled together. The passage  64  has an ovoid like shape in cross section. The shape of the passage  64  (and thus the channel  58 ) is dependent upon the shape and configuration of the cable  14  to be received and otherwise supported by the suspension  10 . Thus this will vary for embodiments of the cable suspension required to support cables of different cross sectional shape, such as a circular. 
         [0066]    A pair of walls extends from opposite sides of the central portion  60 . In an embodiment the walls are formed as an integral portion of the shell  54   a.  The walls are provided with respective blind holes  68  that are in alignment with each other and the axis  18 . The holes  68  are formed with a conical toe. 
         [0067]    The walls are also formed with planar top surfaces  70 . A single threaded blind hole  72  is formed in each of the walls  70  from its top surface  72 . In this embodiment the holes  72  are diametrically opposed to each other. 
         [0068]    The shell  54   b  has a central portion  76  and contiguous and opposite end portions  78 . A channel  80  is formed along the central and end portions  76  and  78  which faces the channel  58 . The channel  80  has a shape and configuration that is symmetric to that of channel  58  about a horizontal plane containing the pivot axis  18 . A connection plate  82  is formed on an outer surface of the central portion  76  and is configured to overlie and engage the walls. Further, the plate  82  is formed with diagonally opposed holes  84  that align with the holes  72 . Mechanical fasteners  86  are passed through the holes  84  and engage the holes  72  via threads to effectively clamp the shells  54   a  and  54   b  together. Cable  14  is received in the body  12  by undoing the fasteners  86  so that the shells  54  can be separated, and subsequently placing the shells  54  about a length wise portion of the cable  14  and then clamping or otherwise coupling the shells  54  together by use of the fasteners  86 . 
         [0069]    The body  12  is attached to the bracket  16  by pivot screws  88 . As illustrated most clearly in  FIG. 2 b   , each pivot screw  88  is formed with a hexagonal head  90 , a shank  92 , and a conical end  94 . A portion of the shank  88  immediately adjacent the head is formed with a screw thread to engage the thread on a respective hole  48 . However the remainder of the length of the shank  92  to the end  94  is smooth. This forms a bearing surface for the body  12  to pivot on. 
         [0070]    When assembling the cable suspension  10 , the body  12  is placed within the bracket  16  and in between the lugs  44  so that the holes  48  are in alignment with the holes  68 . Pivot screws  88  are now screwed into holes  48  from the outside of the lugs  44 , and the unthreaded part of each shank  92  extends into corresponding blind holes  68  of the walls. The extent of penetration of the screws  88  into the holes  68  is limited by the abutment of the conical surfaces  94  with corresponding conical surfaces in the blind holes  68 . Specifically, the cable suspension  10  is arranged so that when the screws  88  are fully screwed into the holes  48  the head  90  does not clamp the bracket  16  against the body  12 . Rather sufficient spacing is provided to enable the body  12  to pivot on the bearing surfaces formed by the shanks  92  and about the pivot axis  18 . As will be recognized the pivot axis  18  corresponds with the central axis of the bolts  88 , holes  68  and holes  48 . 
         [0071]    Optionally, a damping system  95  may be incorporated in the cable suspension  10 . The damping system  95  is operatively coupled between the body  12  and the bracket  16  to dampen motion about the pivot axis  18 . In the present embodiment, the damping system  95  comprises elastomeric members in the form of washers  97  located between the walls and the lugs  44  and through which respective pivot screws  88  pass. 
         [0072]    It should be understood that while the pivot axis  18  extends or otherwise passes through a thickness of the cable  14  received within the body  12 , there is no physical pivot axle, pin, or other member that passes through the thickness of the cable  14 . In a configuration the pivot axis  18  passes through or intersects with a center line of the cable  14 . 
         [0073]    With particular reference to  FIGS. 1 a -1 c   , it will be appreciated that the bracket  16  is provided with a plurality of degrees of freedom of movement. In particular, the bracket  16  due to the engagement of the annulus  30  to the hook  22  can swing in a plane that lies parallel to the pivot axis, and can move in a sway plane that lies transverse to the pivot axis  18 . This motion comes about due to the configuration of the annulus  30  which is in the form of an annulus that is engaged by the hook  22 . With particular reference to  FIG. 1 a    the bracket  16  can sway from side to side in the sway plane that coincides with the plane of  FIG. 1 a    and is perpendicular to the pivot axis  18 . This motion can be considered as equivalent to the annulus  30  pivoting in the plane of  FIG. 1 a    about the hook  22  in clockwise or anticlockwise directions indicated by arrows C and AC. 
         [0074]      FIG. 1 b    illustrates the freedom of movement of the bracket  16  and thus the cable suspension  10  in the swing plane. The swing plane lies parallel to the pivot axis  18  and coincides with the plane of  FIG. 1   b.  Movement of the bracket  16  and thus body  12  in the swing plane coincides with the annulus  30  riding forwards or backwards along the curve of the hook  26 . This may occur for example in response to wind loading from a breeze predominantly from the left hand side or the right hand side of  FIG. 1   b.    
         [0075]    It should also be understood that motion of the bracket  16  and body  12  in the swing and sway planes is not mutually exclusive. Rather, such motions may and will often occur simultaneously. Further, due to the pivot coupling of the bracket  16  to the body  12  about the pivot axis  18 , the body  12  and thus the section of cable  14  received within the body  12  will be maintained in a substantially horizontal plane irrespective of the degree of swing or sway. 
         [0076]    The range of motion of the cable suspension  10  that is available due to the structural and functional features is specifically illustrated in  FIGS. 3 a   - 6   c.    
         [0077]      FIGS. 3 a -3 c    illustrate the cable suspension  10  when the bracket  16  is swayed in an anticlockwise direction AC in the sway plane. This may arise due to for example an unbalanced static load on opposite sides of the suspension  10  owing to different span lengths  14   r  and  14   l  on the right and left sides respectively of the body  12 . For example the length of the span  14   r  may be  100   m  whereas the length of the span  14   l  may be  60   m . Provided there are no other dynamic or static forces acting and that the spans  14   l  and  14   r  lie in the substantially the same vertical plane, then the suspension  10  will move in the sway plane with the bracket  16  pivoting in the anticlockwise direction about the hook  22 . The body  12 , and thus the portion of a cable supported therein, is maintained in a substantially horizontal plane due to pivoting of the body  12  about the pivot axis  18 . 
         [0078]      FIGS. 4 a -4 c    depict a similar situation to that of  FIGS. 3 a -3 c    but where the static load is unbalanced so as to be greater on the left hand side of the body  12  rather than the right hand side. This may be brought about for example by the span  14   l  being of greater length than the span  14   r.  Now the bracket  16  and thus the body  12  are pivoted in the clockwise direction C in the sway plane about the hook  22 . The body  12  is maintained in a substantially horizontal plane in relation of the pivot axis  18 . It is assumed that the cable  14  received by the suspension  10  is also received by adjacent suspensions  10  which are hung at the same vertical height on adjacent posts as the suspension  10  in question as illustrated for example in  FIG. 7 . 
         [0079]      FIGS. 5 a -5 c    illustrate the effects of a plurality of dynamic and/or static forces on a cable  14  supported by the suspension  10 . Here the net effect of the forces has the effect of causing both a swing and a sway of the bracket  16  and thus the body  12  and a consequential pivoting of body  12  about the pivot axis  18 . In particular in these Figures, it will be seen that the bracket  16  undergoes a combined motion of swaying in a clockwise direction about the hook  22  while also swinging upwardly (e.g. riding up a forward portion of the hook  22 ). This motion may occur for example by action of the span length  14   l  being longer than the span length  14   r  and one or both of the action of a wind blowing from left to right with reference to  FIG. 5 b   , and due to a non-zero angle of deviation between mutually adjacent poles from which the suspensions  10  are supported. 
         [0080]      FIGS. 6 a -6 c    illustrate the effect of a similar set of forces as in  FIGS. 5 a -5 c    with the difference being a predominate static load being applied to the span  14   l  rather than  14   r.    
         [0081]      FIG. 7  depicts a cable  14  suspended on three adjacent posts  28   a,    28   b,  and  28   c  by cable suspension  10   a,    10   b  and  10   c.  The suspensions  10   a,    10   b,  and  10   c  are identical to the suspension  10  described in  FIGS. 1 a   - 2   c.  The poles  28   a,    28   b,  and  28   c  lie in the same line and each of the hooks  22   a,    22   b,  and  22   c  are mounted at the same height on their respective poles. In this example the spacing between poles  28   a  and  28   b  is 60 meters while the spacing between poles  28   b  and  28   c  is 100 meters. It is also assumed that cable span  14   l  on the left hand side of cable suspension  10   a  is 60 meters while the length of the span  14   r  on the right hand side of cable suspension  10   c  is less than 100 meters. Thus there is a static load imbalance on opposite sides of the cable suspension  10   b.  In particular there is a greater static load on the right hand side of cable suspension  10   b  than the left hand side. As a consequence the bracket  16  of cable suspension  10   b  sways in the anticlockwise direction about the corresponding hook  22   b.    
         [0082]      FIGS. 8 a -10 b    depict a second embodiment of a cable suspension. In the second embodiment the cable suspension is denoted by the reference number  100 . Features of the cable suspension  100  that have the same or similar structure or function as features in the cable suspension  10  are denoted by reference numbers which have been incremented by  100  with respect to the reference numbers used for the cable suspension  10 . For example, the cable suspension  100  comprises a body  112  configured to receive a cable, and a bracket  116  pivotally coupled to the body  112  about a pivot axis. The bracket  116  is also arranged to couple to a support in the form of a hook (not shown) at a location above the pivot axis. The pivot axis is orientated to pass through a thickness of and most perfectly through a center of a cable received in the body  112 . 
         [0083]    The differences between the cable suspensions  10  and  100  lay in the specific configuration of the bracket  116  and the body  112 . 
         [0084]    The bracket  116  is formed with a U-shaped portion  142  however in this embodiment the U-shaped portion  142  extends over the top and down the sides of the body  116  rather than lying beneath and in effect cradling the body as in the cable suspension  10 . The U-shaped portion  142  has a bridge  146  that extends above and across the body  112  and to which the annulus  130  is attached. Depending from and formed integrally with one side of the bridge  146  is a lug or arm  144   a.  A second lug or arm  144   b  is pivotally coupled to the bridge  146  and extends down an opposite side of the body  112 . Lug  144   b  is hinged on a hinge pin  145  so that it can be selectively disconnected from a pivot screw  188   b.  A strengthening web  150  extends along a side of the lug  144   a  opposite the body  112  and to the annulus  130 . 
         [0085]    As seen in  FIGS. 10 a  and 10 b    the body  112  comprises a plurality of demountable parts including a first shell  154   a  and second shell  154   b.  The shell  154   a  is formed with a relatively deep channel  158  while the shell  154   b  is formed with a relatively shallow channel  180  which faces the channel  158 . The difference in the relative depth of the channels  158  and  180  arises from the manner in which the pivot coupling of the bracket  116  to the body  112  is formed. In particular pivot screws  188   a  and  188   b  are orientated so that their respective heads  190  are disposed on the inside of and engage complimentary shaped recesses  191  in the shell  154   a.  The shell  154   a  has thickened wall portions  166  located centrally along the length of the channel  158  and on opposite sides thereof. Each wall  166  is formed with a hole  168  through which the shank  192  of screw  188  extends. The channel  158  may be formed with a central portion and contiguous opposite end portions of similar configuration to that of central portion  60  and end portion  62 . Thus the central portion may be formed with a straight center line, while the end portions may be formed with center lines that curve or bend away from axial center line of a passage  164  of the body  112 . The curving of the end portions may take the same form as the curving of the portions  62 . 
         [0086]    Upper surfaces of the walls  166  form abutment surfaces for the shell  154   b.  In addition, threaded blind holes  172  extend into the walls  166  from the top surface. 
         [0087]    The shell  154   b  is formed with four through holes  173  that pass from an upper side to an underside of the shell  154   b.  The holes  173  are located at corners of an imaginary rectangle and two of the diagonally opposed holes  173  are arranged to align with the holes  172 . 
         [0088]    To assemble the cable suspension  100  the pivot screws  188   a  and  188   b  are inserted into the holes  168  from the inside of a channel  158 . Thus the heads  190  seat in complimentary shaped recesses  191 . The shanks  192  extend from the holes  168 . A cable can then be placed in the channel  158 . Thereafter, the shell  154   b  is placed over the shell  154   a  and mechanical fasteners such as screws (not shown) pass through two of the holes  173  that align with and engage in threads in the threaded blind holes  172 . Next, either the lug  114   b  can be pivotally connected to the bridge  146  by a pivot pin, or alternately the lug  144   a  can be passed onto the shank  192  of the pivot screw  188   a.  In either case, a nut or other engagement mechanism can be attached to the portion of the shank  192  extending from the lug  144   a  to pivotally connect the lug  144   a  to the pivot screw  188   a . Next, the lug  144   b  is engaged onto the shank  192  of the pivot screw  188   b.  In this embodiment it is seen that the shank  192  is formed with a through-hole  193 . This hole may receive a split pin or other mechanical stop that presents the lug  144   b  from sliding off the shank  192 . 
         [0089]    The pivot axis is an axis that is coincident with the center of the holes  168 , shanks  192 , and holes  148 . Pivot axis passes through a center line of a cable received in the body  112 . The geometric relationship between the pivot axis, a cable passing through the body  112 , and the bracket  16  and in particular the annulus  130  is the same as in the cable suspension  10 . Thus the range of motion and function of the cable suspension  100  is exactly the same as that of the cable suspension  10 . 
         [0090]    While a number of specific embodiments of the cable suspension have been described it should be appreciated that the cable suspension may be embodied in many other forms. For example, the bodies  12  and  112  are depicted as being formed from two main demountable components namely shells  54   a  and  54   b  or shells  154   a  and  154   b . However the bodies  12  may be made from a larger number of parts that are assembled together. It a further variation is possible to form the passage  64  with a circular cross section and fit inserts within the passage  64  that are configured to form a channel of a shape appropriate for the cable  14 . The spacing between suspensions  10  and associated span lengths described in relation to  FIG. 7  are exemplary only and not intended to indicate performance limits of embodiments of the suspension. Also in the described embodiments the first coupling part  29  is exemplified by an annulus while the second coupling part  21  is exemplified by a hook  22 . However these coupling parts can take other forms that enable mutual engagement and facilitate an articulated coupling to the support. For example one or both of the first and second coupling parts may be in the form of a carabiner clip or snap hook that can be selectively opened and closed. 
         [0091]    Various operations of embodiments are provided herein. The order in which some or all of the operations are described should not be construed as to imply that these operations are necessarily order dependent. Alternative ordering will be appreciated by one skilled in the art having the benefit of this description. Further, it will be understood that not all operations are necessarily present in each embodiment provided herein. 
         [0092]    Moreover, “exemplary” is used herein to mean serving as an example, instance, illustration, etc., and not necessarily as advantageous. As used in this application, “or” is intended to mean an inclusive “or” rather than an exclusive “or”, unless specified otherwise, or clear from context. In addition, “a” and “an” as used in this application and the appended claims may generally be construed to mean “one or more” unless specified otherwise or clear from context to be directed to a singular form. Also, at least one of A and B or the like generally means A or B or both A and B. 
         [0093]    Although the disclosure has been shown and described with respect to one or more implementations, equivalent alterations and modifications will occur to others skilled in the art based at least in part upon a reading and understanding of this specification and the annexed drawings. The disclosure includes all such modifications and alterations and is limited only by the scope of the following claims. In particular regard to the various functions performed by the above described components (e.g., elements, resources, etc.), the terms used to describe such components are intended to correspond, unless otherwise indicated, to any component which performs the specified function of the described component (e.g., that is functionally equivalent), even though not structurally equivalent to the disclosed structure which performs the function in the herein illustrated exemplary implementations of the disclosure. In addition, while a particular feature of the disclosure may have been disclosed with respect to only one of several implementations, such feature may be combined with one or more other features of the other implementations as may be desired and advantageous for any given or particular application. Furthermore, to the extent that “includes”, “having”, “has”, “with”, or variants thereof are used in either the detailed description or the claims, such terms are intended to be inclusive in a manner similar to the term “comprising.” 
         [0094]    Further, unless specified otherwise, “first,” “second,” or the like are not intended to imply a temporal aspect, a spatial aspect, an ordering, etc. Rather, such terms are merely used as identifiers, names, etc. for features, elements, items, etc. For example, a first channel and a second channel generally correspond to channel A and channel B, where channel A and channel B are two different channels, two identical channels or the same channel.