STEEL CABLE AND METHOD OF REJECTING THE SAME Russian patent published in 2007 - IPC D07B1/14 

FIELD: handling engineering, in particular, steel cables operating under elevated temperature conditions.

SUBSTANCE: steel cable has outer layer including restricted number of indicator wires having shape similar to that of main wires of steel cable. Indicator wires are hollow along the entire length and are made from material having melting temperature below 300 C. Cavities of indicator wires are filled with colorant substance. Number of indicator wires in steel cable does not exceed rejection number as to number of ruptures of outer wires for the given structure of steel cable, lay direction and classification group of mechanism where this steel cable is to be employed. Method involves interweaving indicator wires into steel cable and detecting defects therein. Defects are revealed by colorant substance traces occurred on cable surfaces as a result of loss of sealing of indicator wire cavity.

EFFECT: enhanced reliability in operation and increased safety of steel cable.

3 cl, 2 dwg