a wheel next to the winding knob, having two sets of teeth, one at right angles to its plane.
any of various wheels having the form of a hoop or short cylinder with a serrated edge, as the escape wheel in a verge escapement.
Origin of crown wheel
First recorded in 1640–50
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
Examples from the Web for crown wheel
Historical Examples of crown wheel
When the teeth are arranged upon the radial or side face of the wheel, as in Fig. 4, it is termed a crown-wheel.
Plate 147 shows us the oldest known arrangement of a crown-wheel escapement in a clock.Watch and Clock Escapements
horology the wheel next to the winding knob that has one set of teeth at right angles to the other
the larger of the two gears in a bevel gear
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012