B - Operations – Transporting – 41 – L
Patent
B - Operations, Transporting
41
L
33/79
B41L 13/00 (2006.01) B25H 7/00 (2006.01) G01B 3/56 (2006.01) G01B 5/24 (2006.01)
Patent
CA 1232129
ABSTRACT A roof framing square has a triangular body with an arcuate slot adjacent its hypotenuse and an arcuate sided aperture spaced inwardly therefrom. Both arcs are defined by radii having as their base point a pivot aperture spaced from the base leg along the vertical leg. A pivot pin seated in the pivot aperture pivotably mounts on the body of a protractor arm which is comprised of arm elements disposed on the opposite surfaces of the body. The protractor arm may be secured in a pivoted position by a clamping screw which draws the two arm elements together tightly against the opposed surfaces. An angular or protractor scale is provided along the arcuate edge of the aperture, and two scales which convert the unit rise per unit length data to angular positions are provided along the opposite sides of the arcuate slot. An angular scale cooperating with that along the arcuate side is in part provided along the hypotenuse side of the body, and a linear measurement scale is provided along the vertical leg. The protractor arm is set at the desired angular position, and the square placed upon the board with the appropriate surface of the protractor arm seated firmly thereagainst so that the scribe line may be drawn along the designated side of the square.
487154
Marks & Clerk
The Stanley Works
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