Geometrical instruments – Straightedge type – Square and pivoted straightedge
Patent
1988-04-13
1990-02-20
Haroian, Harry N.
Geometrical instruments
Straightedge type
Square and pivoted straightedge
33465, 33426, B43L 706
Patent
active
049014447
ABSTRACT:
A carpenter's protractor for use in scribing angled lines on a board or for guiding a portable saw in making angled cuts of a board. The protractor has an angularly adjustable arm which extends outwardly from opposite faces of the protractor body to enable the protractor to be used with either face of the protractor in engagement with the flat surface of a board and with either of a pair of opposed, parallel edges of the adjustable arm in engagement with a straight edge of the board.
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