US 4,047,304 AGranted

Drafting board with adjustable straight-edge assembly

OwnerAnthony Delre, Jr.inventor

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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.

Claims7

Dependent claims

A drafting board comprising in combination:

a pair of laterally spaced base members;
support means for pivotably mounting said base members;
a drawing surface mounted on said base members having front, rear and side edges;
a straight-edge assembly, including at least one ruling edge, carried by said drawing surface and extending laterally thereof, said at least one ruling edge being positionable to extend across said drawing surface in any of a plurality of angles relative to the front edge thereof;
means on said straight-edge assembly and on said base members cooperable to permit selective movement of said assembly across said drawing surface between the said front and rear edges thereof, said means including an extensible multi-segment rotatable shaft carried by said assembly and having wheel elements at the opposed ends thereof and track elements carried by said base members adapted to receive said wheel elements and to cooperate therewith for selective movement of said assembly.

2 more elements

Dependencies are inferred from the claim text.