Printer pin control circuitry

Details Printer pin control circuitry Printer pin control circuitry

1979-05-22

1981-09-29

Sewell, Paul T.

Typewriting machines

Typing by other than type-face or type-die

Character formation by impact

101 9302, 400167, B41J 312

Patent

active

042919924

ABSTRACT:
In the printer pin control circuitry described herein, data bits which request the actuation of respective pins are entered, indirectly, into respective digital equivalent shift registers to provide, for each pin, a respective short term history of actuation requests. A high speed, special purpose digital processor sequentially examines the several shift registers to determine, at successive points in time, whether each pin winding should then be energized or not to produce an effective energizing and damping waveform under a variety of sequential actuation conditions.

REFERENCES:
patent: 3678847 (1972-07-01), Pear et al.
patent: 4041546 (1977-08-01), Stewart
patent: 4159882 (1979-07-01), Sanders et al.
patent: 4162131 (1979-07-01), Carson et al.
patent: 4162858 (1979-07-01), Brandenburg

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