Page 60 - Wire Rope News & Sling Technology - December 2018
P. 60

INVENTOR’S CORNER
         continued from previous page
         versa. Encasing a single strand with material 30, whether
         the strand is one of outer strands 26a-f or core strand 28,
         improves electrical isolation of wires 34 within that strand,
         thereby facilitating signal  transmission  through  the insu-
         lated strand and receipt of the return signal through the re-
         maining strands or vice versa.
           Figure 3 is a cross-sectional view of wire rope 12b taken
         along line 2-2 in figure 1. Wire rope 12b also includes outer
         strands 26a, 26b, 26c, 26d, 26e, and 26f and core strand 28
         encased by material 30 as described with reference to wire
         rope 12a. Wire rope 12b is constructed similarly to wire rope
         12a and, additionally, includes sleeve 32 configured about
         core strand 28. Sleeve 32 increases the wear and corrosion
         resistance of core strand 28, which is encased with material
         30. Sleeve 32 can also be electrically-insulating to increase
         the  dielectric  strength  of  core  strand  28  relative  to  outer
         strands 26a-f. Core strand 28 is often the subjected to the
         heaviest wear because it is contacted by each of the outer   Figure 4: Cross-sectional view showing a wire rope having electrically-
         strands 26a-f. Adding sleeve 32 increases the wear and cor-  insulated strands and a wear resistant, corrosion resistant, and/or
         rosion resistance of core strand 28, thereby increasing the   electrically-insulating sleeve enclosing each strand.
         service life of wire rope 12b. Additionally, increasing the di-
         electric strength of core strand 28 relative to outer strands   Like sleeve 32, sleeves 36a-f increase the wear resistance
         26a-f is particularly useful for continuous resistance moni-  of outer strands 26a-f, and can also be electrically-insulat-
                                                              ing to increase the dielectric strength of each outer strand
                                                              26a-f. When sleeves 36a-f are combined with sleeve 32, wire
                                                              rope 12c provides greater wear and corrosion resistance as
                                                              compared to the other wire ropes described herein, making
                                                              wire rope  12c least susceptible to failures from wear and
                                                              corrosion. Additionally, because the dielectric strength be-
                                                              tween  two  adjacent outer  strands 26a-f  and/or  the  dielec-
                                                              tric strength between one of outer strands 26a-f and core
                                                              strand 28 are increased, wire rope 12c is particularly suited
                                                              for continuous resistance methods in which multiple electric
                                                              signals are transmitted through wire rope 12c.
                                                              Coated cable for a conveyor system
                                                              Pat. 10,017,884  U.S. class D02J 3/00  Int. class B65G 19/24
                                                              Inventor: Craig L. Witting, Keosauqua, IA.
                                                              Assignee: Intraco, Inc., Oskaloosa, IA.
                                                               This patent presents an apparatus and method for prepar-
                                                              ing coated cable for a cable conveyor system. The appara-
                                                              tus includes a stripping die, a swaging die, and a spacing
                                                              fixture spaced from each other at a predetermined interval
         Figure 3:. Cross-sectional view showing a wire rope having electrically-  that corresponds to the spacing interval between discs in a
         insulated strands and a wear resistant, corrosion resistant, and/or   cable conveyor system. The apparatus facilitates the method
         electrically-insulating sleeve enclosing a core strand.
                                                              of stripping a section of coating from the coated cable, and
                                                              securing a barrel to the cable over the stripped section. The
         toring methods which transmit signals from fixed end 13b
         to free end 13a through core strand 28 and receive signals   barrel acts as an attachment point for molded discs carried
         from free end 13a through one or more outer strands 26a-f.  on the cable.
           Alternatively, wire rope 12b could be constructed without   As can be seen by reference to the drawings, and in partic-
         material 30, relying only on sleeve 32 to electrically insolate
         one of outer strands 26a-f and core strand 28 from the re-
         maining strands. Like the alternative embodiment of wire
         rope 12a which relies on a single strand or wire encased with
         material  30, a single strand of wire rope  12b surrounded
         by sleeve 32 facilitates transmission of an electrical signal
         through the insulated strand and received through one or
         more of the remaining strands or vice versa.
           Figure 4 is a cross-sectional view of wire rope 12c taken
         along line 2-2 in figure 1. Like wire ropes 12a and 12b, wire
         rope  12c includes outer strands  26a-f and core strand  28
         encased by material 30. Wire rope 12c includes sleeve 32
         disposed about core strand 28 and outer sleeves 36a, 36b,   Figure 5:  Schematic view illustrating the  apparatus and method
         36c,  36d,  36e, and  36f, each being disposed about outer   wherein the coated cable is first positioned in the apparatus to strip
         strands  26a,  26b,  26c,  26d,  26e,  and  26f,  respectively.   off a section of coating.

         60     Wire Rope News & Sling Technology   December 2018
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