| 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, clamping clutch mechanism supported on the upper hanger section. The clutch mechanism comprises a uniquely dimensioned and configured pair of clamping jaws that are spring-biased together. The jaws grip the interposed strand in such a manner that axial movement of the cable block along the strand is permitted in either direction only when an axial moving force above a predetermined level is applied in that direction to the cable block.
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