Telegraphy – Systems – Position coordinate determination for writing
Patent
1983-02-25
1985-11-26
Schreyer, Stafford D.
Telegraphy
Systems
Position coordinate determination for writing
340706, G08C 2100
Patent
active
045555907
ABSTRACT:
A graphic form or figure drawn on a drawing and larger than the read-out area of a tablet is divided into graphic patterns which are successively read by displacing the drawing. The extent to which the drawing is displaced is recognized, and graphic data read before and after the drawing is displaced is converted into data on one coordinate system and entered as inputs. For entering the graphic data, two points are specified on the drawing, and the coordinates of the specified points prior and subsequent to displacement of the drawing are read and stored in first through fourth registers. The stored coordinates and the coordinates of points on the figure are entered into a coordinate transformation unit which effects arithmetic operations of coordinate transformation.
REFERENCES:
patent: 3867616 (1975-02-01), Kovelitz et al.
patent: 4042866 (1977-08-01), Morita et al.
IBM Technical Disclosure Bulletin, Oct. 1975, New York, U.S.A., P. L. Gardner et al.: "Paper Menus and Keyboards for Digitizing Tablets", (pp. 1589-1590).
"Taschenbuch Elektrotechnik", editor E. Philippow, Grundlagen, 1963, VEB Verlag Technik, Berlin, D.E., Transformation Kartesischer Koordinaten.
European Search Report completed Jun. 22, 1983, The Hague.
Kishi Hajimu
Seki Masaki
Tanaka Kunio
Fanuc Ltd
Schreyer Stafford D.
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