Cable termination system
A cable termination system and method of assembly is provided that clamps strength members of the cable after they have been wrapped around a winding member. The clamping force required is therefore reduced by the capstan effect of the winding member. The winding member is preferably a torus that encircles the cable, and the system may comprise a number of progressively larger tori arranged in sequence along the cable to provide sufficient room for wrapping all of the strength members around them.
1. A cable termination assembly for terminating a cable having an inner component and a plurality of strength members arranged around the inner component, the termination assembly comprising:
a first winding member which forms a ring having a central channel through which the inner component of the cable may pass and arranged such that one or more of said strength members is freely wrapped at least once around said first winding member;
a termination body coupled to the first winding member; and
a clamp adapted to clamp the ends of the strength members that have been wrapped around the first winding member against said termination body, to secure the strength members relative to the winding member.
2. A cable termination assembly according to claim 1 , wherein the termination body includes a channel through which the cable may pass.
3. A cable termination assembly according to claim 1 , further comprising a second winding member.
4. A cable termination assembly according to claim 2 , further comprising a second winding member.
5. A cable termination assembly according to claim 1 , wherein the first winding member is toroidal.
6. A cable termination assembly according to claim 2 , wherein the first winding member is toroidal.
7. A cable termination assembly according to claim 3 , wherein at least one of the first winding member and the second winding member is toroidal.
8. A terminated cable comprising:
a cable having an inner component and a plurality of strength members arranged around the inner component; and
a termination assembly, the termination assembly comprising:
a first winding member which forms a ring having a central channel through which the inner component of the cable passes, wherein one or more of said strength members is freely wrapped at least once around said first winding member;
a termination body coupled to the first winding member; and
a clamp wherein the ends of the strength members that have been wrapped around the first winding member are clamped against said termination body, to secure the strength members relative to the first winding member.
9. A terminated cable according to claim 8 , wherein the clamp comprises a resin bonding member for securing the strength members against the termination body.
10. A terminated cable according to claim 8 , further comprising:
a layer of elastomer between the clamp and strength members.
11. A terminated cable according to claim 8 , wherein the termination body includes a channel through which the cable passes, the first winding member being closer to the end of the terminated cable than the termination body.
12. A terminated cable according to claim 8 , further comprising a second winding member coupled to the first winding member.
13. A terminated cable according to claim 8 , wherein the first winding member is toroidal.
14. A terminated cable according to claim 12 , wherein at least one of the first winding member and the second winding member is toroidal.
15. A terminated cable according to claim 8 , wherein the first winding member has an elliptical cross section.
16. A terminated cable according to claim 8 , wherein the first winding member has a substantially polygonal cross section.
17. A terminated cable according to claim 8 , wherein the termination assembly is encased in a resin.
18. A terminated cable according to claim 8 , wherein the surface of the first winding member is rough for resisting movement of the strength members.
19. A terminated cable comprising:
a cable having an inner component and a plurality of strength members arranged around the inner component; and
a termination assembly, the termination assembly comprising:
a first winding member around which one or more of the strength members are wrapped; and
a clamp arranged to secure the strength members relative to the first winding member, wherein the termination assembly is encased in a resin.