Geometrical instruments – Scriber – Curved line
Patent
1977-12-27
1978-06-20
Haroian, Harry N.
Geometrical instruments
Scriber
Curved line
B43L 1302
Patent
active
040953459
ABSTRACT:
A straight edge assembly for an artist's canvas having a slotted arm and a pair of slotted clamping assemblies coupled to opposite ends of the slotted arm. Each of the clamping assemblies is in turn adapted to clamp to oppositely positioned frame members of the canvas, whereby the slotted clamping assemblies adjustably clamp the arm to frame members to effect a desired clamped position for said arm on said canvas.
REFERENCES:
patent: 2511654 (1950-06-01), Spoor
patent: 3972123 (1976-08-01), Parshall
Haroian Harry N.
Phillips C. A.
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