Page 66 - Wire Rope News & Sling Technology - April 2019
P. 66

INVENTOR’S CORNER
         continued from previous page
         and has sufficient strength that it does not break when, poten-
         tially numerous, seismic nodes 110 are suspended from it dur-
         ing deployment and retrieval. As noted, the main carriage rope
         101 contains no signalling or communication lines, so there is
         no need for protective shielding. Thus, the main carriage rope
         101 is easily reeled onto or off winches or rope bins.

         Wire rope termination and tensioning for cable railing
         Pat. 10,221,522 U.S. class D07B 1/06  Int. class D07B 1/06
         Inventor: Edwin Lee Henderson, Greeley, CO.
         Assignee: Edwin Lee Henderson, Greeley, CO.
           A cable gripping and tensioning apparatus is provided for   Figure 22: Cross-sectional view of the apparatus illustrating how it is
                                                              installed.
         attaching a cable to an anchor point such as a wooden post
         as part of a cable railing system. In one form, the appara-  firmly anchors the cable 10 inside the post 12. By screwing
         tus includes a tubular component and a ferrule. The tubular   the tubular component 20 into the hole 14 to a certain depth,
         component includes external threads to engage the wall of a   the cable may be tensioned.
         hole in the post, an internal axial bore through which a cable   Figure 23 is a perspective view of the termination appa-
         may pass, a first end which may engage a wrench to rotate   ratus. In one embodiment, the cable 10 is inserted through
         the tubular component and a second end which may provide   an axial opening or central passage or bore 28 of the tubular
         a thrust bearing surface. The ferrule is swaged to an end   component 20. The cable enters a first end 22 of the tubular
         portion of the cable. The ferrule provides a thrust bearing   component 20 and exits a second end 23. The ferrule 30 is
         surface for contact with the second end of the tubular com-
         ponent, allowing for the rotation of the tubular component to
         tension the cable while the cable does not rotate.
           Figure 21 shows a plurality of wire ropes or cables 10 ter-
         minating to a wooden post 12. In one embodiment a termina-
         tion and tensioning apparatus attaches the cables 10 to the
         post 12. Termination fittings are not visible as the fittings
         are located in a threaded hole 14 inside the post. The termi-
         nation and tensioning fitting could be installed in any solid
         material such as wood, composite or metal. The termination
         apparatus is ideal in that it securely anchors the cable 10 to
         the post 12 but is not seen by the end user.
           Figure 22 is a cross-sectional view of the cable 10 and ter-
         mination apparatus comprising a tubular component 20 and
         a ferrule 30 as it is installed in the post 12 of figure 21. In   Figure 23: Perspective cross-sectional view illustrating the apparatus
                                                              with a cable attached.
         one  embodiment, a hole  14  is  drilled and tapped into  the
         post 12. The termination apparatus is installed on the cable   then placed over the end of the cable 10. The ferrule 30 is
         10. The tubular component 20 is screwed into the hole 14,   then swaged tightly to the cable 10. A first end 32 of the fer-
         thereby urging the ferrule  30 and consequently  the cable   rule supplies a thrust bearing surface for the second end 23
         10 into the post. The termination and tensioning apparatus   of the tubular component 20 to bear against.
                                                               Figure 24 is a cross-sectional view of the tubular compo-
                                                              nent  20. In one  embodiment, there  is  a  threaded external
                                                              surface 26 on the tubular component 20. These threads 26
                                                              engage mating threads in the hole 14. Many types of threads
                                                              26 might be used, depending on preference and the type of























         Figure 21: Perspective view illustrating multiple cable termination and   Figure 24: perspective cross-sectional view illustrating the  tubular
         tensioning apparatus installed in a wooden railing post.  component of the railing

         66     Wire Rope News & Sling Technology   April 2019
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