What is disclosed is an insulator for providing insulation between a stringing block for an electrical conductor and a pole or cross arm on which the stringing block is mounted. The insulator is made of a non-conductive material such as plastic. The insulator has an upper opening in the body that is configured for receiving a flange of a stringing roller. The insulator can be configured to be mounted directly to a pole or cross arm, such as by using a ratcheting strap. Alternatively the insulator can be configured to be positioned between the roller and a base, such as those known in the prior art.

What is disclosed is an insulator for providing insulation between a stringing block for an electrical conductor and a pole or cross arm on which the stringing block is mounted. The insulator is made of a non-conductive material such as plastic. The insulator has an upper opening in the body that is configured for receiving a flange of a stringing roller. The insulator can be configured to be mounted directly to a pole or cross arm, such as by using a ratcheting strap. Alternatively the insulator can be configured to be positioned between the roller and a base, such as those known in the prior art.

Embodiments of the present invention disclose a hydraulic cable tensioning machine, comprising a tension puller for tensioning a cable, a hydraulic motor for controlling the action of the tension puller, and a hydraulic driving system for driving the hydraulic motor to operate, wherein an output end of the hydraulic driving system is connected to an input end of the hydraulic motor, and a power output end of the hydraulic motor is connected to a power input end of the tension puller.

Embodiments of the present invention disclose a hydraulic cable tensioning machine, comprising a tension puller for tensioning a cable, a hydraulic motor for controlling the action of the tension puller, and a hydraulic driving system for driving the hydraulic motor to operate, wherein an output end of the hydraulic driving system is connected to an input end of the hydraulic motor, and a power output end of the hydraulic motor is connected to a power input end of the tension puller.

Apparatus to lay cables, comprising a work unit bearing at least a pair of capstans to support the cables and provided with a safety device cooperating with the pair of capstans; a winding and unwinding unit for the cables, provided with a dynamic braking device cooperating with a reel for winding and unwinding the cables; an adjustment and safety hydraulic circuit in which a work fluid flows and with which the following are associated: a first power transmission unit to transmit power to the work unit and to pump the work fluid toward the safety device and toward said dynamic braking device, a second motorized braking unit of the work unit cooperating with a third command unit of the safety device, and a fourth regulation unit to regulate the winding and unwinding unit comprising at least a motorized counter-traction valve of the winding and unwinding unit and cooperating with said power transmission unit.

Apparatus to lay cables, comprising a work unit bearing at least a pair of capstans to support the cables and provided with a safety device cooperating with the pair of capstans; a winding and unwinding unit for the cables, provided with a dynamic braking device cooperating with a reel for winding and unwinding the cables; an adjustment and safety hydraulic circuit in which a work fluid flows and with which the following are associated: a first power transmission unit to transmit power to the work unit and to pump the work fluid toward the safety device and toward said dynamic braking device, a second motorized braking unit of the work unit cooperating with a third command unit of the safety device, and a fourth regulation unit to regulate the winding and unwinding unit comprising at least a motorized counter-traction valve of the winding and unwinding unit and cooperating with said power transmission unit.

A joint-use bracket (JUB) for installing multiple communication lines in a joint-use section on a utility pole is disclosed. The JUB includes a curved plate having a generally rectangular shape elongated in a longitudinal direction and curved along a lateral direction. The curved plate is formed to have one or more attachment holes, one or more slots, and multiple threaded receiving holes. The JUB also has multiple hooks formed contiguous to the front surface of the curved plate, each hook having a threaded through hole, wherein multiple bolts are associated with the multiple hooks, respectively. Each hook is configured to hold a wire or a cable through a D-shaped opening that is formed by the hook and the bolt when the bolt is screwed in through the threaded through hole to have the end portion engaged with the threaded receiving hole.

A joint-use bracket (JUB) for installing multiple communication lines in a joint-use section on a utility pole is disclosed. The JUB includes a curved plate having a generally rectangular shape elongated in a longitudinal direction and curved along a lateral direction. The curved plate is formed to have one or more attachment holes, one or more slots, and multiple threaded receiving holes. The JUB also has multiple hooks formed contiguous to the front surface of the curved plate, each hook having a threaded through hole, wherein multiple bolts are associated with the multiple hooks, respectively. Each hook is configured to hold a wire or a cable through a D-shaped opening that is formed by the hook and the bolt when the bolt is screwed in through the threaded through hole to have the end portion engaged with the threaded receiving hole.

An overhead cable utilization system includes a control device configured to hold position information of the supports including heights of the supports, acquire position information of the carriage including a height of the carriage, and calculate winding-up amounts of the operating lines for the carriage to be moved to a target position. The control device is configured to calculate tilts of the operating lines suspending the carriage by using at least the position information of the supports and the position information of the carriage, and is configured to calculate the winding-up amounts of the operating lines for the carriage to be moved to the target position based on the calculated tilts of the operating lines.

An overhead cable utilization system includes a control device configured to hold position information of the supports including heights of the supports, acquire position information of the carriage including a height of the carriage, and calculate winding-up amounts of the operating lines for the carriage to be moved to a target position. The control device is configured to calculate tilts of the operating lines suspending the carriage by using at least the position information of the supports and the position information of the carriage, and is configured to calculate the winding-up amounts of the operating lines for the carriage to be moved to the target position based on the calculated tilts of the operating lines.