How does the ARMIN STROM Equal Force Barrel works?

We had the desire to transmit equal force to the balance, thereby increasing the consistency of rate. Our team developed an ingenious stop-works declutch system that operates inside the mainspring barrel to limit the torque delivered to the balance, providing smooth power delivery. Utilizing a Geneva wheel mounted to the barrel housing cover, the rotation of the mainspring barrel is limited to just 9 full turns. This represents the central 72% of the mainspring’s potential torque curve, the flattest and most consistent portion.