Stylus for position responsive apparatus having electrographic a

Details Stylus for position responsive apparatus having electrographic a Stylus for position responsive apparatus having electrographic a

1986-06-27

1987-09-22

Schreyer, Stafford D.

Telegraphy

Systems

Position coordinate determination for writing

G08C 2100

Patent

active

046956808

ABSTRACT:
A stylus for use with an electrographic system of a variety wherein a digitizer surface is excited. The stylus accomplishes capacitive coupling with the surface without distortion due to perpendicular orientation of its central axis with respect to the digitizer surface. Due to the employment of a carefully shielded signal transmission rod in conjunction with a conductive body wall, spurious noise developed through the body and hand of the user is avoided. A switching technique wherein the stylus is depressed into the digitizer surface is provided, preferably employing a Hall effect switching device.

REFERENCES:
patent: 4158747 (1979-06-01), Muller et al.

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