Layout tool for laying out perpendicular lines

B - Operations – Transporting – 43 – L

Patent

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Details

B43L 7/10 (2006.01)

Patent

CA 2329170

The instrument includes a pair of members (7, 8) arranged together to form an "L" at a right angle. The two opposing ends of the "L" are also affixed to another member (9) making the shape of a 3-4-5 triangle. All members of the instrument are permanently attached, therefore, misalignment is avoided and accuracy is assured and maintained. The two members are configured to slide with respect to one another at the pivot point of the "L" and simply pivot at their opposite ends about their pivot points connecting the third member and creating an enclosed triangle. A spring loaded rivet mounted in one of "L" members slides in a skewed slot (12) in the adjacent member to open the triangle from a closed position where the three sides of the triangle are substantially parallel to one another. The rivet locks in a semi-circular aperture which maintains the tool in a proper locking position.

L'instrument comprend une paire d'éléments (7, 8) agencés de manière à former un L, à angle droit. Les deux extrémités opposées du L sont également fixées à un autre élément (9), ce qui produit une forme de triangle 345. Tous les éléments de l'instrument sont fixés de manière permanente, ce qui évite un mauvais alignement et assure et maintient la précision. Les deux éléments sont conçus de manière à glisser l'un par rapport à l'autre, au point de pivotement du L, et pivotent simplement au niveau de leurs extrémités opposées autour de leurs points de pivotement, reliant le troisième élément et formant un triangle fermé. Un rivet sollicité par ressort monté sur l'un des éléments du L glisse dans une fente oblique (12) de l'élément adjacent, de manière à ouvrir le triangle d'une position fermée, dans laquelle les trois côtés du triangle sont sensiblement parallèles les uns aux autres. Le rivet est verrouillé dans une ouverture semi-circulaire qui maintient l'outil dans une position de verrouillage appropriée.

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