| 摘要 |
A cable block particularly adapted for use in the installation of aerial cable comprises a main frame member formed at its upper end with an inverted V-shaped strand engaging hanger section, at its lower end with a U-shaped pulley support section, and with a spring-biased, wedging cam locking mechanism supported on the upper hanger section. The cam locking mechanism comprises a uniquely dimensioned and configured pair of wedging cams that are intercoupled and spring-biased through respectively associated, and mating spur gears. The cams are symmetrically disposed relative to, and grip, the interposed strand in such a manner that the cable block remains substantially vertically oriented on the strand at all times, and positively locked against movement selectively in either direction along the strand, regardless of the position of the open side of the cable block relative to the strand.
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