Page 68 - Wire Rope News & Sling Technology - April 2019
P. 68

INVENTOR’S CORNER
         continued from previous page
         gage the slot 24 in the first end 22 of the tubular component
         20, thereby providing a means to rotate the tubular compo-
         nent 20. The passage of the cable 10 through the wrench is
         accommodated by an axial slot in the shaft 44.
         Multi-pass crimp collar for a looped cable
         Pat. 10,221,523 U.S. class D07B 1/18  Int. class F16G 11/00
         Inventor:  Daniel  H.  Kindstrand,  Tucson,  AZ.,  Donald  H.
         Warren, Natick, MA.
         Assignee: Schlage Lock Company LLC., Carmel, IN.
           This patent presents a cable assembly including a collar   Figure 28: Looped cable assembly including the crimp collar shown
         and a cable. The collar includes a first opening, a second open-  in figure 27.
         ing and a third opening, each of which extends through the
         collar along a longitudinal dimension of the collar. The cable   diameter d i of the first opening 122 corresponds to the outer
         includes  a  looped  end  and  a  first  cable  segment  extending   diameter d o of the coated cable segments 212 (including the
         through the first opening, a second cable segment extending   outer coating 222), and the inner diameter d i of second and
         through the second opening, a third cable segment extending   third openings 124, 126 corresponds to the outer diameter d o of
         into the third opening, and a fourth cable segment forming   the wire rope 224 (without the outer coating 222). In one form,
         a loop between the first and second cable segments. The col-  the wire rope 224 includes a central inner core 226, and six
         lar is crimped or swaged to the cable and is securely engaged   groups 225 of braided or twisted wires surrounding the inner
         with the first, second and third segments of the cable.  core 226. In some embodiments, the central core 226 may be
           With reference to figure 27, a collar 100 according to one   a solid core. However, in other embodiments, the central core
         form of the invention includes first, second and third collar   226 may itself comprise a group of braided or twisted wires.
         portions 112, 114, 116 which respectively define first, second   At an initial stage of manufacturing, the cable 210 may
         and third openings 122, 124, 126 extending therethrough.   include the coating 222 along its entire length. During man-
         The illustrated openings 122, 124, 126 are sized and shaped
         to receive portions of a cable having a substantially circular
         outer cross-section. Accordingly, each of the openings 122,
         124, 126 has a substantially circular cross-section. In other
         embodiments, one or more of the openings  122,  124,  126
         may have a non-circular  cross-section.  While  other  forms
         are contemplated, the openings 122, 124, 126 extend in an
         axial direction that is substantially parallel to a longitudinal
         axis 101 of the collar 100. In the illustrated embodiment,
         the first and second openings 122, 124 are connected to and
         in transverse communication with one another, and are not
         connected to or in transverse communication with the third
         opening  126. Additionally, in the illustrated embodiment,
         the first opening 122 has a greater inner diameter d i than
         the inner diameters d i of each of the second and third open-
         ings 124, 126, and the second and third openings 124, 126   Figure 29: Another embodiment of the crimp collar.
         have substantially the same or similar inner diameters d i.
           With reference to figure 28, illustrated therein is a looped   ufacture of the looped cable assembly 200, a portion of the
         cable assembly 200 including the collar 100 and a cable 210.   cable 210 may be stripped of the outer coating 222 to ex-
         The cable 210 includes coated cable segments 212, 213 hav-  pose the wire rope 224. The cable 210 may then be passed
         ing a plastic outer coating 222 surrounding a wire rope 224,   through the collar 100 three times. In the first pass, the ca-
         and bare cable segments 214, 216 which include the wire rope   ble 210 is passed through the first opening 122 such that the
         224 without the outer coating 222. In the collar 100, the inner   first coated cable segment 212 is positioned in the first collar
                                                              portion 112. The second coated cable segment 213 is then
                                                              bent or wrapped back toward the collar 100, thereby forming
                                                              a cable loop 223. In the second pass, the exposed wire rope
                                                              224 is passed through the second opening 124 such that the
                                                              first bare cable segment 214 is positioned in the second col-
                                                              lar portion 114. The second bare cable segment 216 is then
                                                              bent or wrapped back toward the collar 100, thereby forming
                                                              a cable turn or elbow 215. In the third pass, the exposed wire
                                                              rope  224 is passed  into or through the third opening  126
                                                              such that the second bare cable segment 216 is positioned in
                                                              the third collar portion 116. Once the three passes have been
                                                              completed, the collar 100 is deformed to securely engage the
                                                              collar 100 with the cable 210 such as, for example, by a me-
                                                              chanical crimping press. With the collar 100 deformed, the
                                                              first  collar  portion  112 directly engages the  outer  coating
                                                              222 of the cable 210, and the second and third collar por-
         Figure 27: Crimp collar of the looped cable.         tions 114, 116 directly engage the outer wire groups 225 of

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