Telegraphy – Systems – Position coordinate determination for writing
Patent
1982-07-06
1984-06-26
Schreyer, Stafford D.
Telegraphy
Systems
Position coordinate determination for writing
G08C 2100
Patent
active
044567871
ABSTRACT:
An electrographic system utilizing a singular resistive layer which may be transparent in conjunction with a supportive substrate. Through the use of an electromagnetic field generating sytlus in conjunction with coordinate alternating border switching, linear output performance is achieved. With the utilization of sum, difference and divider circuitry in conjuction with received output signals, the system remains immune from voltage variations occasioned in conjunction with the stylus and, thus, the stylus may be operated in varying spaced-relationship from the resistive surface.
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Spec. Sheet-Trazor Touch Panel Model 506, Spinal System Instruments Inc.
Spec. Sheet-Touch Screen Digitizer, TSD Display Products Inc.
Spec. Sheet-E270 Transparent Position Sensor, Elographics, Inc.
Quayle Stanley F.
Schlosser Philip A.
Schreyer Stafford D.
Scriptel Corporation
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