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Digitizing tablet

  • US 4,455,450 A
  • Filed: 09/25/1981
  • Issued: 06/19/1984
  • Est. Priority Date: 09/25/1981
  • Status: Expired due to Term
First Claim
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1. An arrangement for generating an electrical representation of the location of an implement on a writing area, said arrangement comprising first and second sheets of insulating material, at least one of said sheets being deformable, said first and second sheets including first and second electrical means respectively, for generating the X and Y coordinates of said location when said sheets are urged into contact with one another by said implement, said sheets being sealed to one another in a manner to insulate said first and second electrical means from one another and to form a sealed pocket therebetween, said pocket containing an insulating fluid or gaseous medium under pressure for maintaining said sheets in a spaced apart position.

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