How the spring-loaded armature works as a clutch and brake

On most EM motors a light spring holds the armature gear clear of the first gearbox gear. At power-on the motor spins freely for a moment, then magnetism pulls the armature in against the spring and engages the gears. At power-off the spring pulls it clear again, so the gearbox stops instantly while the armature coasts.

Systems

• Electro-mechanical

Source: Repairing Electro-Mechanical (EM) Coin Operated Games to 1978, Part Two, Clay Harrell (pinrepair.com)