Drafting board with adjustable straight-edge assembly

Details Drafting board with adjustable straight-edge assembly Drafting board with adjustable straight-edge assembly

1976-06-01

1977-09-13

Phillips, Charles E.

Geometrical instruments

Scriber

Curved line

B43L 500

Patent

active

040473040

ABSTRACT:
A drafting board includes a pair of laterally spaced base members which are pivotable upon supporting elements. The base members carry a drawing surface which is thus also pivotable. A straight-edge assembly having at least one ruling edge is carried by the drawing surface and is movable therealong between front and rear edges of the drawing surface. The straight-edge assembly has a bracket assembly at each lateral end thereof surmounting the side edges of the drawing surface, and the ruling edge of the assembly extends between the brackets and is pivotably secured to the brackets. The straight-edge assembly is laterally extensible and is movable along the drawing surface in a manner such that one end thereof is movable independently of the other so as to permit angular positioning of the ruling edge relative to the front edge of the drawing surface.

REFERENCES:
patent: 842144 (1907-01-01), Gee
patent: 2577159 (1951-12-01), Seferow
patent: 2701918 (1955-02-01), Phelps
patent: 2708328 (1955-05-01), Bryda

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