4. Materials

a. Conductive yarn – To create a closed electric circuit between the power source and the heater

b. Insulated heating yarn – To produce heat of desired intensity

c. Strap on battery and temperature control panel – Battery would enable the heater to generate heat through electric current. A temperature control unit would vary the resistance in the electric circuit to control the heat and map it to the desired intensity. It would also cut-off the current supply to maintain the desired temperature.

5. Socks manufacturing

As depicted in the Figure 4 below, a knitting machine would be used to create two different layers of the sock which would sandwich the insulated heating yarn. The insulated heating yarn would be stitched to the base layer. The female part of the snap button could be stitched on the top layer using a conducting yarn, connecting the insulated heating yarn below. The band of the temperature control panel would have the male part of the snap button stitched through the conductive yarn. Closing the snap buttons would complete the circuit to enable the flow of current.