French curve — Safekipedia Discoverer

A French curve is a special tool used to draw smooth, curvy lines. It is usually made from metal, wood, or plastic and has many different curved parts. People use it in drawing by placing it on paper and tracing around its curves with a pencil or other tools to make the shape they want.

A set of the three most common French curves, also known as a Burmester set. The bottom object is most commonly used for hyperbolas; the smaller one above it is suited for ellipses. The large one is used mostly for parabolas.

These tools are very useful in two main areas: manual drafting, where people draw technical plans, and fashion design, where designers create clothes. By having many different curves, a French curve helps draw all sorts of round and flowing shapes easily.

The French curve was invented a long time ago by a German mathematician named Ludwig Burmester. Because of this, it is sometimes also called a Burmester curve set. It remains a helpful tool for anyone who needs to draw smooth, beautiful curves.

Clothing design

A complete Burmester set from the Lexikon der gesamten Technik (1904)

French curves are helpful tools in fashion design and sewing. They are used along with hip curves, straight edges, and right-angle rulers. People can use French curves to change the shape of commercial clothing patterns, making necklines, sleeves, and other parts fit better.