Geometrical instruments – Straightedge type – Rules
Reexamination Certificate
2008-08-14
2010-06-29
Guadalupe-McCall, Yaritza (Department: 2841)
Geometrical instruments
Straightedge type
Rules
C033SDIG020
Reexamination Certificate
active
07743522
ABSTRACT:
A multi-purpose hand tool having opposing planar surfaces. A first long side has a linear edge for drawing straight lines. Graduations are provided along a beveled surface for use in measurement. Short sides perpendicular to the straight edge facilitate placement in an inside corner. A remaining side has serrations for spreading an adhesive. A cover is secured to the main body by pins in the cover and openings in the main body. The main body and cover house a level. A viewing window incorporates a lens for magnification. Guideways are configured to receive a straightedge, the guideways being aligned at precise, given angles. Projections in each guideway cooperate with a groove provided along only one given surface of the straightedge to assure proper orientation of the straightedge in the guideways. The main body and cover have smooth undulations for receiving and seating the fingers. A recess in the cover seats the tips of the fingers. A convex surface surrounding the viewing window protects the level. Spaced openings along the tool facilitate measurement and marking.
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Guadalupe-McCall Yaritza
Volpe and Koenig P.C.
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