Applied to parts which do not vary in circumference. It is applied like the oblique except that the…

In this illustration, "the driven surface of the slide coincides with the tangent to the spiral, the…

Illustration of a spiral named after the 3rd century BC Greek mathematician Archimedes.

An illustration showing how to construct a spiral with compasses and four centers. "Given the pitch…

"If B and C are points in the spiral and the ratio of AC to AB be given, the intermediate point D may…

A graph showing a logarithmic or equiangular spiral. The spiral is created in polar coordinates (r,Θ)…

A helix spiral generated by revolving about an axis at an angle less than 90 degrees. This generates…

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

"This class of spirals may be generated by unwinding a perfectly flexible but inextensible chord from…

Spiral with lines AB and CD drawn on piece of paper shown flat.

Spiral with lines AB and CD drawn on piece of paper and rolled into a cylinder to form spiral running…

The evolute spiral stove tile is a painting during the German Renaissance. It is a wavelike pattern…

"An ornament or kind of chain, of gold, twisted spiraly, and bent in a circular form, which was worn…

The evolute spiral trellis (garden frame) is made out of wrought iron. It is a wavelike pattern that…