Adjustable compass

Adjustable compass device

Amusement device for tracing geometrical figures

Angle gauge

Angle measuring device

Angle measuring device

Angle setting mechanism, in particular for vises

Angle tangent micrometer

Apparatus and method for routing radii and drawing...

Apparatus for alignment of plaid fabric on a cutting table

Apparatus for converting a measuring tape to a compass

Apparatus for cutting and/or scribing circles and ovals

Apparatus for drafting inaccurate conic perspective

Apparatus for drawing an ellipse using a piece of string

Apparatus for drawing boundary lines on a play surface

Apparatus for drawing compound designs, with offsetting, size-va

Apparatus for indicating the angle of a drafting parallel

Apparatus for marking eyeglass lens blanks

Apparatus for tracing ellipses

Apparatus for tracing the lens opening in an eyeglass frame