HELICOPTER THREADABLE STRINGING BLOCK ASSEMBLY FOR POWER CONDUCTORS

摘要

A converter yoke and stringing block assembly adapted to be threaded with a helicopter-dispensed conductor hauling line dropped thereonto from either side of a power line. The yoke sub-assembly can be used in lieu of a conventional stringing block yoke thereby to convert a manually threaded block for threading by helicopter, or the features of the invention can be embodied in a stringing block as initially manufactured. The separate yoke brackets are spaced apart to provide an open-ended threading passage and the exit end of the latter is initially extended by dislodgeable guide members shiftable to their normal retracted positions automatically as the advance end of the comductor running board enters the stringing block, the guide members being thereafter restrained in their normal retracted position until manually reset. A load transfer latch normally interconnects the two brackets of the yoke and includes means for holding the latch open until dislodged by the conductor hauling line as it is threaded through the stringing block.