Patent ID: 7469485

Claim:
Apparatus for replicating quadrilateral shapes, said apparatus having components comprising: a) four sides of slidably adjustable length having extremities that pivotably engage the extremities of contiguous sides to form a substantially coplanar frame of adjustable quadrilateral shape, said sides being comprised of two elongated rigid, substantially flat arms disposed one atop another, extending between distal and rounded proximal ends and having aligned longitudinally centered slots, and tracking means comprised of two bolts in spaced apart relationship which penetrate said aligned slots to permit sliding separation in the direction of elongation but prevent movement in the transverse direction, and a circular aperture in each proximal end, b) securing means threadably interactive with said bolts to adjustably hold said arms in a desired state of separation, and c) threaded locking means extending through said apertures to interconnect and secure said sides in a desired angular relationship.