Geometrical instruments – Straightedge type – Plural straightedges – relatively moveable
Patent
1985-10-10
1987-04-28
Haroian, Harry N.
Geometrical instruments
Straightedge type
Plural straightedges, relatively moveable
33495, 33 1N, 33536, G01B 910
Patent
active
046602933
ABSTRACT:
The angle gauge employs pivoted, straight edge arms having indicia therealong to determine length of the arms of bent or angled material as measured from the virtual apex of the angle of bend regardless of the radius of bend. Angle indicia is also provided at the pivot for determining the angle of bend.
REFERENCES:
patent: 740742 (1903-10-01), Bush
patent: 2495609 (1950-01-01), Semrau
patent: 3003244 (1961-10-01), Fogliano
patent: 3561122 (1971-02-01), Beckwell
patent: 3623231 (1971-11-01), Holt
Haroian Harry N.
Seemann Robert A.
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