Mainspring mechanism and device having the same
Manual override and locking mechanism and actuator including...
Mechanical energy device
Mechanical stored energy positioning actuator
Method and apparatus for oil well pumping
Method and apparatus for tensioning an accumulator spring of a d
Motion operated power apparatus
Motor driven valve
Motor mechanism for child's swing
Motor operator for a stored energy operating mechanism
Motor-driven, spring-returned rotary actuator
Mounting device for spiral spring
Multi-stage energy storage device
Music box operation stopping mechanism