Reset mechanism responsive to loss of torque

Reversible rotary actuator with spring return

Rotary electric actuator with a mechanical spring return...

Rotating mechanism for a crystal ball

Rotation damper

Special effects drive mechanism for self-propelled toy vehicles

Speed governing and decoupling drive mechanism

Spiral spring power source for toy

Spring assemblies

Spring drive

Spring drive

Spring drive device

Spring drive for toy vehicles

Spring drive means for toys

Spring drive mechanism, particularly for mobile toys

Spring drive unit of pull-back windup type

Spring motor for generating constant torque

Spring operating mechanism for a circuit interrupter

Spring power device

Spring powered prime mover