Combined digitizer and plotter for computer aided drawing

Details Combined digitizer and plotter for computer aided drawing Combined digitizer and plotter for computer aided drawing

1990-01-03

1991-02-05

Evans, Arthur G.

Boots, shoes, and leggings

346145, G06K 1500

Patent

active

049911163

ABSTRACT:
Apparatus combining the input function of a digitizer and the output function of a plotter to provide a current simultaneous plot of computer input as traditionally provided by a cathode ray tube display is disclosed for computer aided drawing. The apparatus provides a casement having a transparent upper working surface comprising a digitizer pad that is operated responsive to position of a separated puck. Transparent drawing film is releasably maintained in a uniquely determined position by a peg type fastening element on the underside of the transparent upper working surface. Flat-bed type plotting apparatus is carried in the casement beneath the drawing film for operative contact with the undersurface thereof. The plotting apparatus provides a marking member and a correction member. The upper working surface of the casement provides plural switches to input keyboard type instructions to an associated computer. Image plotting by the apparatus similar to substantially simultaneous with data input in the fashion of a cathode ray tube display. The apparatus operates with existing software and driver devices with minor modifications.

REFERENCES:
patent: 4371893 (1983-02-01), Rabeisen
patent: 4451895 (1984-05-01), Sliwkowski
patent: 4707109 (1987-11-01), Kanno et al.
patent: 4730186 (1988-03-01), Koga et al.
patent: 4764880 (1988-08-01), Pearl
patent: 4920422 (1990-04-01), Lapiekre

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