Electrographic system

Details Electrographic system Electrographic system

1983-09-14

1985-06-18

Schreyer, Stafford D.

Telegraphy

Systems

Position coordinate determination for writing

G08C 2100

Patent

active

045236542

ABSTRACT:
An electrographic system utilizing a transparent resistive layer which operates in conjunction with a stylus or cross hair cursor excited from an a.c. source to develop coordinate defining electrical signals. Through the utilization of a sequence of border switching arrays, the signals may be collected from the resistive surface in a predetermined sequence and submitted in serial fashion to the input of a signal treatment network. As a consequence, only one such network is required to effect operation of the system. The hand-held cursor is formed including a transparent disk carrying cross hairs which is excited from an a.c. source to very accurately locate coordinate positions upon the resistive surface.

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Trazor Touch Panel, Model 506, Sales Brochure, 1 page.
Elo Graphics Inc., E270 Transparent Position Sensor, Sales Brochure, Jan. 1981, 2 pages.
TSD Touch Screen Digitizer, Sales Brochure, Models TF-12, TF-15, 5 pages, Jul. 15, 1981.

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