Patent · US Expired

X-Y Position detector

US4568798A · kind A · utility

7Cited by

5References

9Claims

0Family size

Assignee

Preh, Elektrofeinmechanische Werke Jakob Preh, Nachf. GmbH & Co. · DE

Inventors

Peter Ambros · Leutershausen, DE
Hans-Peter Koch · Bad Neustadt an der Saale, DE
Walter Budig · Stadtilm, DE
Rudolf Limpert · Strahlungen, DE
Heinz-Jurgen Siede · Bad Neustadt an der Saale, DE
Gisela Westermeir · Bad Neustadt an der Saale, DE

Key dates

Filing date	Nov 10, 1983
Grant date	Feb 4, 1986
Priority date	—
Expiry date	Nov 10, 2003

Classification

Technology area (CPC G)Physics
CPC primaryG06F3/045
WIPO fieldComputer technology
WIPO sectorElectrical engineering

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.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.