Control system for electrographic stylus writing apparatus

Details Control system for electrographic stylus writing apparatus Control system for electrographic stylus writing apparatus

1979-12-20

1982-10-05

Curtis, Marshall M.

Recorders

Electric recording

Electrochemical

346155, 178 30, 118660, G03G 15044, G01D 1506

Patent

active

043530800

ABSTRACT:
In a matrix array for the supply of an electrographic stylus writing apparatus, a plurality of styli are driven by short pulses through R/C networks. The styli are divided into subgroups and parallel capacitors connect the styli of each subgroup to a high voltage switch which is responsive to a capacitor pulse driver. Each stylus is also driven through a resistive line which completes the R/C circuit. The resistive lines are connected in parallel for similar styli of each group to a resistor enable pulsing circuit and all resistive lines are connected via isolation diodes to a resistor reset means. In operation, a short pulse from the capacitor driver circuit is applied to all the capacitors of a single group and an enabling pulse is applied to a predetermined single resistive line of each group so that the combined, enabled R/C circuit for a single stylus within one of groups is activated.

REFERENCES:
patent: 2848535 (1958-08-01), Hunt, Jr.
patent: 3145071 (1964-08-01), Vance
patent: 3469028 (1969-09-01), Yamamoto
patent: 3530456 (1970-09-01), Holloman
patent: 3611419 (1971-10-01), Blumenthal
patent: 3624661 (1971-11-01), Shebanow et al.
patent: 3859960 (1975-01-01), Lloyd
patent: 4030107 (1977-06-01), Tagawa
patent: 4115763 (1978-09-01), Brown, Jr. et al.

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