Geometrical instruments – Straightedge type – Cord type
Patent
1993-05-03
1998-03-17
Bratlie, Steven A.
Geometrical instruments
Straightedge type
Cord type
401 9, B44D 338
Patent
active
057273243
ABSTRACT:
A chalk box having a generally teardrop-shaped main body section and an arched neck section extending forwardly from the main body section. A reel containing a line is rotatably mounted within the case. The line exits the case through in aperture at the forward end of the neck section. The line exits through the aperture at an angle relative to the longitudinal axis of the case. The configuration of the case makes the chalk box of the present invention less awkward to use than prior art chalk boxes. Also, the case may be provided with a hook lying along the longitudinal axis of the case. When the line is engaged with the hook and the case is suspended at the end of the line, the chalk box functions as a plum bob.
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