| 摘要 |
<p>The present invention relates to improvements on the conventionally used drawing compass, used to scribe circle and curve, by means of providing novel integrated axial locking system thereof for reliable locking and unlocking mechanism provided, for lateral arms (7) and (15) of the drawing compass, through locking assemblies (8) and (8'), with multi start screws, located at both the ends of threaded rod (11) of the drawing compass (16), during the axial adjustment of said lateral arms (7) and (15) while measuring the radius of the circle.</p> |
