Abstract: A tool inserted within a circular duct is adapted to securely engage the inner surface of the duct to facilitate drawing the duct through a conduit. The tool includes a screw inserted within a hollow tube-like member open at a first end and having a threaded inner surface along the length thereof for engaging the screw. A second, closed end of the tube-like member includes an expanded end portion. Positioned on the screw adjacent the first end of the tube-like member is a nut. Located along the length on the outside of the tube-like member are a plurality of alternately arranged rigid cylindrical spacers and compressible tubular sleeves. Displacement of the nut along the screw toward the hollow tube-like member causes the nut to abut and displace an immediately adjacent cylindrical spacer. Further rotation of the nut produces an abutting linear arrangement of the alternating cylindrical spacers and tubular sleeves causing the longitudinal compression of each of the tubular sleeves.

Abstract: A duct liner interconnecting device for temporarily interconnecting the ends of sections of duct liner includes a pair of complementary semi-cylindrical elements hinged together along one edge for movement from an open position in which the elements are side by side to a closed position in which the elements form a short tubular member with a longitudinal channel to receive the ends of duct liner sections to be interconnected, a pair of arcuate spring clips pivotally attached to one of the elements releasably latch the elements together in the closed position, and a tapped aperture in one of the elements receives a lubrication fitting to allow the introduction of lubricant into the duct liner to facilitate pulling of lightguide cable through the duct liner.

Abstract: A mounting system for an additional communication cable on a utility pole is described. This mounting system includes a support arm which bolts to a through bolt that extends through the utility pole and is used to mount a pre-existing communication cable. A strand clamp is mounted to the outer end of the support arm, and the strand clamp serves to support a strand and a communication cable such as a CATV cable in the conventional manner. If desired, a diagonal reinforcing strap can be provided between the pole and the support arm. By using a single through bolt to mount both the strand clamp for the existing communication cable and the support arm, clearance and interference problems are minimized and installation costs are reduced.