ClipArt ETC
These are skew bevel wheels, made of a hyperboloid of revolution around an axis.

Sliding Contact

These are skew bevel wheels, made of a hyperboloid of revolution around an axis.

A hyperbolic spiral.

Hyperbolic spiral

A hyperbolic spiral.

Illustration of a hyperbolic spiral, also called a reciprocal spiral, it is a transcendental plane curve. It is a type of Cotes' spiral and is the exact opposite of an Archimedean spiral.

Hyperbolic Spiral

Illustration of a hyperbolic spiral, also called a reciprocal spiral, it is a transcendental plane curve.…