Electrographic system

Details Electrographic system Electrographic system

G - Physics

08

C

350/6, 340/135.1

G08C 21/00 (2006.01) G06F 3/033 (2006.01)

Patent

CA 1200893

-26- ELECTROGRAPHIC SYSTEM ABSTRACT OF THE DISCLOSURE 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 todevelop 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 effectoperation 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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