A force sensor particularly suited for use in an electronic stylus that senses the contact force on its nib for recording pen strokes and handwriting recognition. The sensor has a housing for a load beating member for receiving an input force to be sensed and associated circuitry for converting the input...http://www.google.co.uk/patents/US7523672?utm_source=gb-gplus-sharePatent US7523672 - Collapsible force sensor coupling
