X-Y Position detector

Details X-Y Position detector X-Y Position detector

1983-11-10

1986-02-04

Schreyer, Stafford D.

Telegraphy

Systems

Position coordinate determination for writing

178 20, 252511, G08C 2100

Patent

active

045687986

ABSTRACT:
An x-y position detector is shown which comprises a pen and contact plate with a resistive layer formed thereon. Point electrodes are provided on the four sides of the resistive layer. The materials of the resistive layer and the pen are selected such that the pen is in reliable galvanic contact with the resistive layer. The resistive layer is hard and smooth, and permits easy motion of the pen.
The resistive layer consists of carrier particles with a hardness of between 5 and 9 on the Mohs hardness scale, pyrolytically coated with carbon and embedded in a binder whereby the resistive layer is hard and enables easy motion of the pen. The surface on which the pen moves is formed by molding the resistive material on a smooth intermediate substrate.

REFERENCES:
patent: 2527835 (1950-10-01), Miller
patent: 3449516 (1969-06-01), Cameron et al.
patent: 3497617 (1970-02-01), Ellis
patent: 3697687 (1972-10-01), Larson et al.
patent: 3699439 (1972-10-01), Turner
The Review of Scientific Instruments, vol. 41, No. 12, Dec. 1970, "An Eleical Sensor of Plane Coordinates", G. S. Hurst and J. E. Parks.

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