Geometrical instruments – Straightedge type – Plural straightedges – relatively moveable
Reexamination Certificate
2007-01-11
2009-02-03
Bennett, G. Bradley (Department: 2841)
Geometrical instruments
Straightedge type
Plural straightedges, relatively moveable
C033S041100
Reexamination Certificate
active
07484308
ABSTRACT:
Crafting and graphics instrument including a base plate, a movable rod, a control mechanism for controlling movement of the rod relative to the base plate such that movement of the rod in only one direction is allowed while movement of the rod in an opposite direction is prevented, and an actuating arm assembly movable to different angular positions relative to the base plate. The actuating arm assembly includes at least one shaped surface enabling formation of a line or cut by drawing a writing implement or a cutting implement along it. As the rod moves, the actuating arm assembly also moves so that the shaped surface is laterally displaced across a substrate on which the instrument is placed. This enables the formation of a series of parallel lines or cuts in or on the substrate. A table-mounted version is also disclosed.
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Bennett G. Bradley
Roffe Brian
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