Communications: electrical – Systems – Portable self-contained
Patent
1975-06-23
1976-05-18
Curtis, Marshall M.
Communications: electrical
Systems
Portable self-contained
178 18, 178 19, 340166EL, G06F 314
Patent
active
039582345
ABSTRACT:
Sensor apparatus for taking position signals from either ignited or extinguished cell positions at intersections of the column and row coordinate conductors of a gas tube display screen associated with an information handling system. The sensor apparatus includes a hand-held stylus having a plurality of spaced plates that capacitively interact with the adjacent row-column conductors as signal potentials are applied thereto by the normal gas panel addressing circuitry. The capacitive interaction of the plates causes signals to be picked up from the row-column conductors, the signals being differentially amplified to give a detect signal of the stylus position on the display which has a high degree of resolution, the detect signal in combination with data from the addressing circuitry giving a row-column (X-Y) coordinate address indication of the stylus on the panel for utilization in any associated information handling system.
REFERENCES:
patent: 3182291 (1965-05-01), Nassimbene
patent: 3505666 (1970-04-01), Thorpe
patent: 3559307 (1971-02-01), Barrakette et al.
patent: 3680078 (1972-07-01), Baskin et al.
patent: 3846580 (1974-11-01), Brenner
patent: 3887767 (1975-06-01), Miller
Berriman Harry T.
Curtis Marshall M.
International Business Machines - Corporation
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