Fabricating the self-sizing spiral cuff, turned out to be relatively easy, that is, once it was realized that a laminated structure would curl if the inside layer was stretched, relative the outer layer. I might add, this realization happened as an ah-ha moment, preceded by multiple imaginary designs over a long period of time.
What you see here are a group of metal plates used in the fabrication. First a strip of stretched silicone rubber sheeting is clamped between metal plates. Next an unstretched strip of silicone rubber sheeting is positioned, followed by positioning an electrode contact with attached lead. A thermal setting adhesive is applied to the stretched layer and the stretched and unstretched layers are clamped together in a heated hydraulic press.