Improved instruments for drawing circles

B - Operations – Transporting – 43 – L

Patent

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Details

B43L 9/04 (2006.01) B43L 9/00 (2006.01) B43L 13/20 (2006.01)

Patent

CA 2210712

A device for forming circles on a drawing surface that includes, in part, a first rotatable member (12) and a second rotatable member (14). The first rotatable member is substantially flat and includes an opening found therein. The second rotatable member is resiliently disposed within the opening. A first means (16) elevates the first rotatable member above the drawing surface to prevent smearing of lines on the surface. A second means elevates the second rotatable member above the drawing surface to prevent smearing of lines on the surface and to engage the surface for stabilizing the rotatable member over the surface. The second mechanism elevates the second rotatable member to approximately the same level as the first rotatable member. A plurality of holes are disposed in the first and second rotatable members. The holes accommodate a marking instrument used for forming the circles.

Il est question d'un instrument pour tracer des cercles sur une surface de dessin qui comprend, entre autres, un premier membre rotatif (12) et un second membre rotatif (14). Le premier membre rotatif est relativement plat et une ouverture y est pratiquée. Le deuxième membre rotatif est disposé dans l'ouverture de façon à pouvoir bouger. Un premier moyen (16) élève le premier membre rotatif au-dessus de la surface de dessin pour empêcher les lignes de s'étaler sur la surface. Un deuxième moyen élève le deuxième membre rotatif au-dessus de la surface de dessin pour empêcher les lignes de s'étaler sur la surface et pour établir un contact avec la surface de façon à stabiliser le membre rotatif au-dessus de la surface. Le second moyen élève le deuxième membre rotatif au même niveau environ que celui du premier membre rotatif. Plusieurs trous sont pratiqués dans le premier et le second membre rotatif. Les trous permettent le passage d'un instrument de marquage servant à tracer les cercles.

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