Computer graphic drawing apparatus with coarse and fine controls

Details Computer graphic drawing apparatus with coarse and fine controls Computer graphic drawing apparatus with coarse and fine controls

1988-01-20

1990-01-02

Brigance, Gerald

Communications: electrical

Land vehicle alarms or indicators

Internal alarm or indicator responsive to a condition of the...

340706, 340709, 178 18, 273148B, G09G 100

Patent

active

048916323

ABSTRACT:
An improved computer graphic drawing apparatus having a housing unit adapted for being held in hand during graphic drawing operations, a coarse adjusting device movably disposed in the housing unit, and an IC arrangement disposed in the housing unit and electrically connected to the coarse adjusting device for being coupled with a host computer. The improvement resides in a few adjusting device movably disposed in the housing unit and includes: a tracking member movably installed on one side of the housing unit; a first and a second rotary member separately installed in the housing unit and rotatably engaged with the tracking member for being rotated on X and Y coordinate axes; and a first and a second encoding device respectively provided in the housing unit and electrically connected to the IC arrangement in conjunction with both rotary members so as to effect signal conversion and transmission in accomplishing fine adjustment operations.

REFERENCES:
patent: 3541521 (1970-11-01), Koster
patent: 4562347 (1985-12-01), Hovey et al.
patent: 4719455 (1988-01-01), Louis
patent: 4748441 (1988-05-01), Brzezinski

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