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         tion.  This  may allow  a user  to  both wind  and unwind  an
         item. A user may attach the string to the spool 200 (e.g., by
         tying it or wrapping it around the shaft 210, or by inserting
         in slots, holes, notches or other orifices of various sizes and
         shapes (not shown) in shaft 210 configured to anchor the end





                                                              Figure 12: Overhead elevation view of a winder.

                                                              example one on each end of the shaft 210 as shown in the em-
                                                              bodiment of figure 10. These flanges 220 may keep the string
                                                              being  wound  from  sliding  off  the  shaft  210.  One  or  more
                                                              notches 230 may be formed in one or more of the flanges 220.
                                                              The string may be inserted into a notch 230 after winding,
                                                              which may keep an end of the string from unraveling off the
                                                              spool 200. In some embodiments, an individual spool 200 may
                                                              include a plurality of notches of different shapes and/or sizes,
                                                              which may allow one spool 200 to accommodate a variety of
                                                              items of different shapes and/or sizes. Many sizes and/or con-
                                                              figurations of spool 200 may be provided to accommodate var-
                                                              ious items such as wire, rope, string, webbing, hose, tubing,
                                                              cord, and/or any other elongated and flexible object capable of
                                                              being wound. Each spool 200, regardless of size or configura-
                                                              tion, may include an interior cavity 240 with a pattern cor-
                                                              responding to that of spindle 140, thereby making each spool
                                                              200 interchangeable and operable by a single winder 100.
                                                              Elastomeric  load  compensators  for load  compensa-
                                                              tion of cranes
                                                              Pat. 9,688,516  U.S class B66C 13/16  Int. class B66C 13/16
         Figure 10: Perspective view of a winder and spool.   Inventor:  Walter  Billiat,  Houma,  LA.,  Joseph  Angeron,
                                                              Houma, LA., Danton Gutierrez-Lemini, Grand Prairie, TX.,
         of items such as wire, rope, string, webbing, hose, tubing,   Chris Chaison, Houma, LA., Eric Luke, Hurst, TX.Assignee:
         cord etc. firmly to the shaft to allow winding to commence).   Oil States Industries, Inc., Arlington, TX.
         In some embodiments, an individual spool 200 may include   Figure 13 shows a first kind of offshore crane 20 that is
         a plurality of orifices of different shapes and/or sizes, which   susceptible to heave loads when performing an off-board lift
         may allow one spool 200 to accommodate a variety of items   of  a  payload  24  from  a  floating  vessel  19.  In general,  the
         of different shapes and/or sizes.                    crane 20 has a base 21, a boom 22 mounted to the base 21,
           Spinning the spool 200 may cause the string to be wound   a hoist rope 23 descending from the boom for attachment to
         around the shaft. The spool 200 may include flanges 220, for   the payload 24, and a hoist mechanism 25 mounted to the
                                                              base 21 or to the boom 22 for applying tension to the hoist
                                                              rope 23 to lift the payload 24.
                                                               In particular, the crane 20 is a pedestal-mounted offshore
                                                              crane  having a  box-frame boom  22.  A  specific  example  of
                                                              such  a crane  is a NAUTILUS® brand of pedestal marine
                                                              crane Model 180B-70 sold by Oil States Industries, Inc. of
                                                              Arlington,  Tex. The base  21 is a cylindrical  pedestal, and
                                                              the boom 22 is mounted to the pedestal via a swing-circle
                                                              assembly 26. The swing circle assembly 26 rotates the boom
                                                              22 about a central vertical axis 27 of the pedestal 21. In ad-
                                                              dition, the boom 22 is pivotally mounted to the swing-circle
                                                              assembly 26 so that a pair of 12 inch (30.5 centimeter) di-
                                                              ameter hydraulic cylinders 28 may erect the boom 22 to a
                                                              desired angle of inclination. For example, at a zero angle of
                                                              inclination, the boom 22 is horizontal and provides a radius
                                                              of seventy feet (21 meters) from the pedestal axis 27 to a
                                                              main hook 34. In this fashion, the jib 37 is positioned over a
                                                              first location to pick up the payload 24, and then positioned
                                                              over a second location to drop off the payload.
                                                               The swing-circle assembly  26 also carries an operator’s
                                                              cab 29, a diesel engine 30, and a hydraulic pump 31 driven
                                                              by the  diesel  engine.  The  hydraulic  pump  31  powers  the
         Figure 11: Side elevation view of a winder.          swing-circle  assembly  26,  the hydraulic  cylinders  28,  the
         62     Wire Rope News & Sling Technology   August 2017
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