Image Number 2 for United States Patent #4878148.
A crocheted fabric is formed of electrically insulating elastic yarn interlocked to a wefting yarn by a warping yarn. The crocheted fabric bears on its one surface which is disposed toward the skin plural strands of conductive yarn. This conductive yarn is interlocked to the crocheted fabric by the warping yarn. It proceeds in a serpentine path along the long axis of the grounding strap. The interior surface of the wrist bracelet bearing this prominent, and visually inspectable, conductive yarn provides reliable electrical contact to the skin. Meanwhile, the outer surface of the grounding strap reliably maintains electrically insulating qualities.