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Ruler compass / compass

Ruler compass
Ruler compass

The existing compass couldn't draw a circle of wanted size without a ruler. As well, one must have drawn a circle by measuring with a ruler and set thewanted size whenever you drew a circle. Ruler compass can draw a wanted size circle easily without measuring thesize with a ruler every time. We need a ruler to use a compass. Without a ruler, we cannot draw a circle with wanted size of radius.
When you move a leg of the compass, the gradation will revolve to show the radius. When you move a leg of the compass, the gear connected with the leg of the compass will express the radius by moving the center axis.

University

Kyungsung university

Kyungsung university
Busna, South Korea

Design

kyungsung university

kyungsung university
Busan, South Korea

In San Kim

Design

Kyungsung University

Kyungsung University
Busan, South Korea

Chae Won Won