Rotating rule. (Machine-translation by Google Translate, not legally binding)

摘要

Rotating rule. The object of the invention is a rule for drawing. The rule revolves on the zero of its setting, if the rule is quite flat you can easily cross two or more of them to solve trilateration problems, if we use them with a transporter it allows to use polar coordinates to draw, and two rules or more with conveyors allow solving triangulation problems. The alternatives are a scale and a compass, or solve the problems of triangulation and trilateration mathematically. (Machine-translation by Google Translate, not legally binding)