Geometrical instruments – Straightedge type – Plural straightedges – relatively moveable
Patent
1996-03-07
1997-06-03
Will, Thomas B.
Geometrical instruments
Straightedge type
Plural straightedges, relatively moveable
33500, 33613, B43L 710
Patent
active
056342799
ABSTRACT:
An orientation apparatus for planar-surface-mounted items includes a base assembly and a first right triangle unit connected to a first end portion of the base assembly. A first pivot assembly pivotally connects the first right triangle unit to the first end portion of the base assembly. A first lock assembly locks the first right triangle unit at a selected orientation with respect to the base assembly. A second right triangle unit is connected to a second end portion of the base assembly. A second pivot assembly pivotally connects the second right triangle unit to the second end portion of the base assembly. A second lock assembly locks the second right triangle unit at a selected orientation with respect to the base assembly. The base assembly can include a first telescopic member connected to the first pivot assembly and a second telescopic member connected to the second pivot assembly. The first telescopic member includes a pair of peripheral first riser portions, and the first lock assembly includes a plurality of first lock bumps attached to the first right triangle unit for engaging the pair of the first riser portions of the first telescopic member. The second telescopic member includes a pair of peripheral second riser portions, and the second lock assembly includes a plurality of second lock bumps attached to the second right triangle unit for engaging the pair of the second riser portions of the second telescopic member.
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