Abstract: A skyline transfer apparatus is disclosed herein having in one embodiment a carriage. The carriage in one form comprising: at least one carriage side-plate; a plurality of skyline riding sheaves rotatably attached at near and outbound end of the carriage side-plate(s). The skyline riding sheaves ride upon a tensioned skyline during operation of the carriage. A mainline attachment point is provided at the outbound end of the carriage side-plate(s). A haul-back line attachment point is provided at the near end of the carriage side-plate(s); and a drop line extends below the carriage to support a load. A jack is also disclosed, pivotably attached to an intermediate spar. The intermediate spar supports the jack above a ground surface between a main yarder and a strongpoint. The jack comprises at least one side-plate(s) with at least one skyline supporting sheave rotatably attached to the side-plate(s).

Abstract: An arcuate jack is arranged to be secured to a spar for supporting a skyline over it. A carriage assembly comprises a main carriage arranged to travel on the skyline and a secondary carriage supported on the main carriage for movement between leading and trailing ends of such main carriage. A brake is operative between the main and secondary carriages to control movement of the secondary carriage on the main carriage. The secondary carriage supports a drop line for connection to a load, and a mainline is connected to the secondary carriage for pulling the carrige assembly along the skyling. A guide for the mainline is provided on the spar and is disposed below the jack in an arrangement whereby the pull on the carriage assembly from the mainline is substantially tangent to the arcuate contour of the jack at its entrance end.