Patent ID: 8089336
Filing Date: 2012-01-03
Classification: G06F

Abstract:
1. Apparatus for detecting the position of a mechanical interaction, comprising a first fabric conducting layer having electrically conducting fibres, electrically conducting tracks and terminals connectable to a circuit; a second fabric layer having conducting fibres and insulating fibres; a third separating layer constructed from an insulator with openings therein to allow conduction to occur between said openings when pressure is applied; and a fourth fabric conducting layer having electrically conducting fibres, electrically conducting tracks and terminals connectable to a circuit; wherein: said first fabric conducting layer and said fourth fabric conducting layer are only separated by said second fabric layer and said third separating layer; said second fabric is a knitted fabric having a substantially smooth back surface and an irregular front surface comprising raised knots; and said knitted fabric is positioned such that said irregular front surface is in contact with said first conducting layer and said smooth back surface is in contact with said separating layer, and said raised knots provide insulation in the absence of pressure being applied.