Contrary to a classical movement which experiences a progressive decrease of the force transmitted to the regulator between the initial winding torque and the end of the power-reserve, the constant force device is designed to transmit impulses whose energy remains identical and regular whatever the degree of winding of the barrel spring.
The constant force device absorbs the force generated by the barrel once every second and redistributes it every 10 seconds to the tourbillon. This principle can be observed by watching the elegant inertia weight in DeWitt’s Tourbillon Force Constante Academia.


Full article in print copy of Europa Star BaselWorld magazine issue 2/2006
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