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AssigneeThe United States of America as represented by the Secretary of Agriculture
InventorJoseph W. Gorsh
Estimating the term…
A yarder is employed with a running skyline provided with a carriage. The running skyline has an intermediate suspended support consisting of a hanger bar with a shoe pivotally connected to the lower end of the hanger bar by a transverse shaft. The shoe has supporting sheaves and an enclosure rail, with the skyline haulback line supportingly received between the rail and the sheaves. The carriage is open on one side so as to be able to pass the transverse shaft of the intermediate suspended support. The open side of the carriage has a yieldable safety gate which allows the carriage to pass the transverse shaft but which retains the haulback line within the carriage. The lower portion of the carriage has respective sheaves for a slack pulling line and a log suspension line to which logs to be transported are connected. A mainline extends between the yarder and a junction member connected to both the slack pulling line and the log suspension line. The upper portion of the carriage has sheaves normally engageable on the haulback line and substantially conformably engageable on the rail when the carriage passes the intermediate suspended support.
A logging system comprising a yarder, tail-spar means, running skyline means interconnecting the yarder and said tailspar means, load carriage means, means movably supporting said carriage means on said skyline means, said skyline means including a haulback line, intermediate support means located between the yarder and said tailspar means, said intermediate support means comprising intermediate spar means, a hanger bar suspended from said intermediate spar means, shoe means adjacent to the lower portion of said hanger bar and supportingly engaging said haulback line on the underside thereof, and transverse shaft means pivotally connecting said shoe means to said hanger bar, said carriage means having a longitudinally extending side opening located to form a passageway for said transverse shaft means when the carriage means moves past said shoe means, said shoe means comprising longitudinal cover means retentively surrounding the haulback line, said longitudinal cover means comprising a downwardly facing channel-shaped elongated rail member mounted on said shoe means, said carriage means comprising sheave means engageable on said rail member, said sheave means including a walking beam member pivoted to said carriage means, a pair of sheaves mounted on opposite sides of the pivotal connection of said walking beam member to said carriage means, said sheaves being engageable on said rail-member, and movable safety gate means on said carriage means normally overlapping said side opening and being yieldably engageable by said transverse shaft means to allow the carriage to move past said shoe means.
Dependencies are inferred from the claim text.