| 摘要 |
An all-electric radio controlled slack pulling, braking and battery recharging system for logging operations on a moutainside is disclosed. Independent battery powered slack pulling and radio and brake electrical systems are provided, together with alternators which recharge the storage batteries of the electrical system in response to movement of alternator driving sheaves along a skyline in either direction. The drop or skidline is pulled through a carriage by a electric slack puller motor connected through a torque multiplier with a line pulling sheave. Skyline and drop or skidline brakes are applied by low pressure hydraulics boosted by spring pressure and are released by higher hydraulic pressure.
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