Stylus or pen with tactile response to user

摘要: A stylus for interactive use with a graphics input tablet provides user tactile response whenever the tip (5) passes through in-presence boundary of tablet. The defines limit distance above surface beyond which position signals are regarded as unreliable. is produced by movable mass (2) within body (1) propelled an internal mechanism (9, 10) into lower end stop (11) towards tablet, and upper (3) away from experience in each case different. In alternative arrangement, attached to moving arranged normally be held retracted but automatically protrude boundary.