Abstract: An embodiment is an articulating straight-edge apparatus having an asymmetrical hub with a lobe having a flat edge. The hub has a bearing hole, an axle, a circular side with recesses which provide stopping at pre-set angles. There is a secant slotted channel through the lobe. The floor of the channel has depressions that provide stopping for translational shift. A connecting block is covered with a back and front plate. The block has an angle positioning SLD. The SLD impinges recesses as the hub is rotated. Additionally, there is a translational shift mechanism which includes a sliding rail in the channel. The rail has a SLD aligned to impinge a depression as the rail moves through the channel, therein stopping at a depression. Attached to the siding rail is a straight-edge element. The straight-edge serves as a carpenter's square, and can be adjusted angularly and translationally with manual force.

Abstract: An embodiment is an articulating straight-edge apparatus having an asymmetrical hub with a lobe having a flat edge. The hub has a bearing hole, an axel, a circular side with recesses which provide stopping at pre-set angles. There is a secant slotted channel through the lobe. The floor of the channel has depressions that provide stopping for translational shift. A connecting block is covered with a back and front plate. The block has an angle positioning SLD. The SLD impinges recesses as the hub is rotated. Additionally, there is a translational shift mechanism which includes a sliding rail in the channel. The rail has a SLD aligned to impinge a depression as the rail moves through the channel, therein stopping at a depression. Attached to the siding rail is a straight-edge element. The straight-edge serves as a carpenter's square, and can be adjusted angularly and translationally with manual force.

Abstract: The invention is a masonry tool that is a framing square with a retractable straightedge, where the framing square can be fitted to a level. The major components of the invention are a foldable flat straightedge, a mounting bar and housing which seats a notched disk that rotates on an axial shaft that is joined to the straightedge, a finger activated switch that moves a spring loaded slideable pin that clicks into a notch on the disk corresponding to an angle, and fastening components and elements for longitudinally affixing the mounting bar and housing to the end of the level. The retractable straightedge, when unlocked, can be rotated from a retracted position to a reversibly locked right angle position, and vice versa.