Drafting device

Details Drafting device Drafting device

1991-06-05

1992-07-21

Will, Thomas B.

Geometrical instruments

Straightedge type

With means for moving straightedge over a surface

33449, B43L 704

Patent

active

051311577

ABSTRACT:
A drafting device includes a body and a roller assembly rotatably mounted on the body for allowing movement of the drafting device across a support surface. The drafting device also includes a spring disposed between the body and roller assembly for producing friction on the roller assembly to resist unintended rolling of the roller assembly.

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patent: 933798 (1909-09-01), VanAltena
patent: 1064006 (1913-06-01), Quirus
patent: 2277452 (1942-03-01), Pettersen
patent: 3165839 (1965-01-01), Hoagland
patent: 3482318 (1969-12-01), Hopkinson
patent: 3726017 (1973-04-01), DeMathe
patent: 3745657 (1973-07-01), Gonzalez

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