Geometrical instruments – Straightedge type – Base attached
Patent
1991-05-13
1992-03-31
Haroian, Harry N.
Geometrical instruments
Straightedge type
Base attached
33 1AA, B43L 500
Patent
active
050995812
ABSTRACT:
A portable, lighted drafting station comprises a shallow tray the size of a briefcase having a cover made from a sheet of translucent material sliding into slots in the rim of the tray. A T-square and two triangles are held by a set of brackets against the undersurface of the cover. A fluorescent light inside the tray resting over a sheet of reflective material leaves enough storage to accommodate pencils and other drafting implements. A simple, spring-biased bolt locks the cover into the tray by engaging a notch into the stored T-square.
REFERENCES:
patent: 416437 (1989-12-01), Bradley
patent: 537930 (1995-04-01), Nowland
patent: 2257005 (1941-09-01), Grosse
Charmasson Henri J. A.
Haroian Harry N.
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