rotary motion of the steering wheel is converted to reciprocating motion by
Reciprocating motion A crank can be used to convert circular motion into reciprocating motion, or conversely turn reciprocating motion into circular motion.
Roulette To determine the winning number and color, a croupier spins a wheel in one direction, then spins a ball in the opposite direction around a tilted circular track running around the outer edge of the wheel. The ball eventually loses momentum, passes through an area of deflectors, and falls onto the wheel and into one of 37 (in French/European style roulette) or 38 (in American style roulette) colored and numbered pockets on the wheel.