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AssigneeThe Swatch Group Research and Development Ltd
InventorsRudolf Dinger, Jean-Pierre Mignot, Jean-Jacques Born
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Regulating members for a mechanical timepiece, specifically a system based on magnetic interaction between a resonator, in a form of a tuning fork for example, and an escape wheel, as a magnetic escapement. In the system plural areas of magnetic interaction between the resonator and the escape wheel are arranged such that torques produced at the escape wheel by the interactions compensate each other if the escape wheel is not synchronized at the frequency of the resonator. This results in negligible torque in the escape wheel when the escape wheel rotates slowly in a direction of an arrow or opposite direction. This allows the timepiece to start with a low mainspring torque and without any start procedure or device and provides better resistance of the timepiece against a loss of synchronization in event of a shock.
A system for regulating a mechanical timepiece based on magnetic interaction between a resonator and an escape wheel, the interaction creating radial and tangential forces acting on the escape wheel and generating torques therein,
A system for regulating a mechanical timepiece based on electrostatic interaction between a resonator and an escape wheel, the interaction creating radial and tangential forces acting on the escape wheel and generating torques therein,
A system for regulating a mechanical timepiece based on magnetic interaction between a resonator and an escape wheel, said interaction creating radial and tangential forces acting on the escape wheel and generating torques therein, the resonator defined by a tuning fork with two arms,
A system for regulating a mechanical timepiece based on magnetic interaction between a resonator and an escape wheel, the interaction creating radial and tangential forces acting on the escape wheel and generating torques therein, wherein the system is configured so that the torques due to the tangential forces act in opposite directions and cancel each other out when the resonator is stationary and a torque is applied to the escape wheel, wherein the resonator is a tuning fork, the tuning fork carries a permanent magnet on two arms, and magnetic flux from the magnets is directed towards an exterior of the tuning fork on one of the two arms and towards an interior of the tuning fork on the other of the two arms, and wherein the escape wheel carries a ferromagnetic structure in a form of a toothed crown with an inner toothing and an outer toothing arranged so that when one tooth of the inner toothing is opposite the magnet of the one arm of the tuning fork, the magnet located on the other arm of the tuning fork is situated between two teeth of the outer toothing and vice versa, and wherein the tuning fork takes a form of an H-shaped double tuning fork whose central portion serves as a base.
Dependencies are inferred from the claim text.