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continued from previous page                         temporary anchor 16. Such a system helps make sure that
          tower 12 may include a tower frame 26 providing the primary  the base of the zip line is in operating position. Such a sys-
          structural component of the tower 12. The tower brace 20 and  tem also helps make sure that a participant may not exit the
          the tower clevis 22 may be attached to the tower frame 26 at  tower 12 before the zip line system 10 is ready, thereby pre-
          the bottom of the tower 12. The tower frame 26 may include  venting accidents. Referring to figure 10, one embodiment of
          a staircase 24 within the tower frame 26 and the staircase  a trailer 14 is depicted. The trailer 14 may include a trailer
          24 leads from the bottom of the tower 12 to the platform 30  frame 44 providing the primary structural component of the
                                                              trailer  14.  The  trailer frame  44 may include  one  or  more
                                                              trailer supports 48 connected to the trailer frame 44.
                                                               The trailer frame 44 may include trailer ear brackets 40
                                                              having trailer ear journals 42 attached to the trailer frame
                                                              44  and providing a connection  means  for  connecting  the
                                                              tower 12 to the trailer 14. A tower 12 may be connected to
                                                              a trailer 14, such that it can be raised or lowered. A tower







          Figure 7: Perspective view of a zip line system.

          of the tower 12. The staircase 24 is generally configured as a
          spiral staircase and may allow participants to walk up to the
          platform 30 at the top of the tower 12. The platform 30 is gen-
          erally surrounded by a tower skirt 32. The tower skirt 32 may
          include at least one door 28 that provides an exit from the
          platform 30. The topmost part of the tower 12 may include a
          tower strut 38. The tower strut 38 may include a tower brace
          34 that may allow for a tower connection 36 with a cable 18.
           In one embodiment, a door 28 may be held closed by elec-
          tronically actuated locks  (not shown),  which  may be con-
          trolled by one or more buttons (not shown) on the tower 12.
          Buttons on a tower 12 may be connected to a system on a












                                                              Figure 9: Rear perspective view of the tower.

                                                              12 may be pivotally connected to a trailer 14 by connecting
                                                              a tower clevis 22 to a corresponding trailer ear bracket 40
                                                              such that the tower 12 can be pivoted into an operational
                                                              position or lowered for transport. The trailer 14 may include
                                                              trailer wheels 46. The trailer 14 may include a trailer cross-
                                                              beam 50 including one or more beam extensions 52. A beam
                                                              extension 52 may have a beam jack 56 connected on one end.
                                                              The trailer 14 may include a trailer box 54. The trailer 14
                                                              may include one or more trailer jacks 58, generally connect-
                                                              ed to the trailer frame 44 at the corners of the trailer 14. The
                                                              trailer 14 may include a trailer hitch 64.
                                                               The trailer 14 may include at least two anchor tracks 60.
                                                              Generally, one anchor track 60 will be connected to the in-
                                                              side of the trailer frame 44 toward the rear of the trailer 14.
                                                              The anchor track  60 may  support a temporary  anchor  16
                                                              when loaded onto the trailer 14.
                                                               Referring  to  figure  11,  one  embodiment  of  a  temporary
                                                              anchor 16 is depicted. A temporary anchor 16 may include
                                                              an anchor frame 68. An anchor frame 68 may have anchor
                                                              wheels 66 connected to the anchor frame 68, generally at the
         Figure 8: Perspective view of a tower.               corners of the anchor frame 68. A set of anchor wheels 66

         56     Wire Rope News & Sling Technology   April 2017
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