Preh Elektrofeinmechanische Werke Jakob Preh Nachf Gmbh & Co.

Hans-Peter Koch

Peter Ambros

Gisela Westermeir

Walter Budig

Heinz-Jurgen Siede

Rudolf Limpert

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.

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Bad Neustadt, Germany

Hans-Peter Koch