Drawing device

Details Drawing device Drawing device

1992-09-21

1994-06-21

Will, Thomas B.

Geometrical instruments

Scriber

33 2311, B43L 1300

Patent

active

053218914

ABSTRACT:
This invention relates to an apparatus for writing or drawing that is characterized by an enclosed case having a front side and a back side and in which the front side consists of a transparent screen. Disposed within a substantially rectangular case is a slightly adhesive powder which adheres to the undersurface of the transparent screen so as to render it opaque. A first and second stylus is mounted within the case for producing relatively thick and relatively thin lines by movement along the undersurface of the transparent screen in a manner for removing the adhesive powder and to thus produce lines. The first and second stylus are both moved in the X and Y coordinates through the use of external horizontal and vertical line control knobs which are internally coupled to the multiple stylus by first and second transverse rods, each being supported on and attached to a separate cable loop system. The multiple stylus may be fixedly withdrawn from the screen by actuation of the retraction thus enabling the operator to use both hands for moving the stylus to a second horizontal and/or vertical position on the screen without production of a line from the first to the second writing or drawing.

REFERENCES:
patent: 2671965 (1954-03-01), Pollitt
patent: 4459602 (1984-07-01), Anderka et al.
patent: 4550503 (1985-11-01), Klawitter
patent: 4949466 (1990-08-01), Auer et al.

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