Drawing device having mobile stylus tracing lines on glass plate

Details Drawing device having mobile stylus tracing lines on glass plate Drawing device having mobile stylus tracing lines on glass plate

1988-07-14

1989-12-26

Haroian, Harry N.

Geometrical instruments

Scriber

33 1M, B43I 1300

Patent

active

048888745

ABSTRACT:
A toy drawing device in which a window in a housing containing powder is covered by a glass plate whose edges are received within a groove in a sectioned rim joined to a window frame to prevent leakage of powder therefrom. A mobile stylus under the control of an operator acts to trace lines on a layer of powder adhering to the undersurface of the glass plate. To prevent injuries should the glass plate break, its outer surface is shielded by a transparent protective film formed of heat-formable, synthetic plastic material.

REFERENCES:
patent: 2172864 (1939-09-01), Calva et al.
patent: 3760505 (1973-09-01), Clark

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