×

Position indicators

  • US 4,126,760 A
  • Filed: 08/09/1977
  • Issued: 11/21/1978
  • Est. Priority Date: 08/16/1976
  • Status: Expired due to Term
First Claim
Patent Images

1. Apparatus for indicating a coordinate of a point in a working area, comprising a plurality of generally coextensive, adjacent but spaced apart layers, each layer containing at least one conductor having at least one substantially planar rectangular surface area, each layer extending across the working area and being entirely divided, within the working area, into a number of rectangular zones by conductor surface area boundaries with two opposite boundaries of each zone extending completely across the area of interest substantially at right angles to the direction in which a coordinate is to be measured, each zone being constituted either by at least part of a conductor or by absence of a conductor, and the division into zones being different for each layer, the apparatus including a plurality of contact means, at least one associated with each conductor and spaced therefrom, and the layers and the contact means being so constructed that when a point in the working area is indicated by pressure at that point on an outer layer of the plurality of layers, each conductor which extends to the position corresponding to the point in the layer containing that conductor is pressed into contact with its associated contact means of one or its associated contact means.

View all claims
  • 0 Assignments
Timeline View
Assignment View
    ×
    ×