Position indicator

Details Position indicator Position indicator

1975-11-14

1977-06-14

Robinson, Thomas A.

Telegraphy

Systems

Position coordinate determination for writing

340347AD, H04N 100, G08C 2100

Patent

active

040298990

ABSTRACT:
A graphical input device for computer aided displays is described in which the area of interest is divided by the conductors of two orthogonal sets of coils. Each region of the of interest area is within a coil or combination of coils in each set unique to that region, so that when a change of the magnetic flux associated with a stylus indicating a point of interest occurs, currents induced in the coils represent the position of the point.

REFERENCES:
patent: 3466646 (1969-09-01), Lewin
patent: 3819857 (1974-06-01), Inokuchi

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