Patent ID: 8720863

Claim:
Apparatus for attachment to a tow line of a helicopter for stringing a sock-line underneath a cross member of a power line tower comprising: a first member for engaging the tow line such that the first member is suspended by the tow line from the helicopter for forward movement over the cross-member; a second member for attachment to the sock-line for pulling the sock-line to a position adjacent the cross-member; and a rotary member connected between the first member and the second member for the second member to be towed forwardly by the forward movement of the first member; the rotary member including at least one opening for receiving the cross-member therein; the rotary member being rotatable to allow said at least one opening to move rearwardly relative to said forward movement of the first and second members so that the second member moves underneath the cross-member as the first member movers over the cross-member; the rotary member being arranged to maintain connection between the first and second members as said at least one opening moves rearwardly.