
1947 - Curvimeter 342
In 1935, the company A. Ott introduces a new, handy curvimeter. This easy-to-use curve length measuring device is used, for example, to trace roads on maps and thus determine their length. Unlike existing devices at the time, it has a measuring roller that does not roll directly on the curve. Instead, you can use a kind of crosshair and a magnifying glass to guide a measuring mark exactly tangentially along the curve.
Deutsches Museum Digital1