Page 68 - Wire Rope News & Sling Technology - December 2018
P. 68

INVENTOR’S CORNER
         continued from previous page
         The union of the short cable and the long cable creates a
         “composite” cable having a high-performance termination on
         at least one end. In most applications it is preferable to set
         the length of the short cable so that the interwoven splice
         will exist at a desired location.
           Figure 22 shows two components of a composite cable be-
         fore they are joined together. Short cable 26 includes an ad-
         vanced termination that has been attached to one end as de-
         scribed previously. Cable 10 in this example is a “long cable”
         with no attached hardware. In this example both cables are



















                                                              Figure 23: Perspective view, showing a composite cable.
                                                              forming an eye on one cable end that is interlocked with an
         Figure 22: Perspective view, showing a terminated short cable.  eye on the other cable end).
                                                               In general, a section of completely unwoven strands are
         made of braided strands. The drawing does not depict the   created on  the  end  of  one  cable  and a section  of  loosened
         braided construction completely accurately, since it is quite   (yet not unwoven) strands are created on the end of a second
         complex, but the lines show that some of the braid compo-  cable. The completely unwoven strands on the first cable are
         nents are twisted in one direction and some are twisted in   then woven into the voids between the loosened strands on
         the  opposite  direction.  It is  possible  using  prior  art  tech-  the second cable in a prescribed and repetitive fashion. A
         niques to create an interwoven, interlocking, or otherwise   specified number of weaves are created. Any excess material
         gripping splice between these two pieces of cable. Figure 23   from the unwoven strands of the first cable is then removed
         shows the two cable segments joined together by an inter-  and the free ends are secured by any suitable method, such
         woven splice. Short cable 26 and long cable 10 are joined to-  as taping or whipping.
         gether by interwoven section 24. The result is a much longer   The creation of a proper interwoven splice is a skilled job
         “composite” cable.                                   that is customarily carried out by a trained rigging special-
           The terms “short” and “long” are relative to each other. A
         typical “short” cable might range from as short as 5 meters
         to as long as 100 meters. In some rare cases this may be
         even longer. A “long” cable might range from 50 meters up
         to several km in length. When the terms “short” and “long”
         are used in this description, the reader should understand
         that the “long” cable is typically 4 or more times longer than
         the short cable. The determination of the length of each com-
         ponent is often dictated by the availability of testing equip-
         ment for evaluating the performance of the short cable, and
         the actual application, as will be explained subsequently.
           A detailed explanation of the prior art interweaving tech-
         niques used in cable splices is beyond the scope of this dis-
         closure, but the reader may benefit from some general expla-
         nation. An interwoven splice is applicable to any synthetic
         tensile strength member made of multiple strands, so long
         as the strands are arranged in some ordered fashion. Cable
         strands are generally braided, twisted, or laid in a helical
         fashion. Generally, however braids such as a twelve strand
         are most common due their ease of splice-ability. A perma-
         nent joint can be created between two cables (or two parts
         of a single cable) by partly untwisting the strands and then
         interweaving them. Interwoven splices can be used to form
         a loop or eye on an end of a cable. They may also be used for   Figure 24: Sectional elevation view, showing another type of high-
         joining the ends of two cables together (either directly or by   performance termination.

         68     Wire Rope News & Sling Technology   December 2018
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