Helical [adjective]

The carriage is supported on helical springs and solid steel wheels.

To give the water a rotary motion he had inserted a helical piece of angle iron, and so prevented deposition.

It consisted of a metallic cylinder having a helical indenting groove cut upon it from end to end.

When the pilot valve opens, the pressure beneath the piston is relieved and it is seated by the helical spring above.

The translation of a body in helical motion is called its advance.

The Ford transverse rear spring was supplemented by two helical springs placed vertically between the Ford and tractor frames.

He invented the helical form of the balance spring and a form of chronometer escapement much like Earnshaw's.

Corresponding helical ribs in the guides rotated the rollers as the car moved.

The propeller wheel (Fig. 38) is a screw having a large helical dimension.

A small helical spur pinion at the other end of this countershaft receives its motion from a larger gear turned by the hand crank.