ClipArt ETC
A wheel with cogs or teeth at right angles to its plane.

Crown-wheel

A wheel with cogs or teeth at right angles to its plane.

"It is apparent by turning the crank, C, the wheel will revolve, for the thread of the screw passes between the cogs of the wheel. By means of an axle, through the centre of this wheel, like the common wheel and axle, this becomes an axceedingly powerful machine, but...is slow." -Comstock 1850

Screw and Wheel

"It is apparent by turning the crank, C, the wheel will revolve, for the thread of the screw passes…