Escapement mechanism of a timepiece
AssigneeRolex SA
InventorsFabiano COLPO, Olivier KARLEN, Quentin PETER, Xuan Mai TU
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Abstract
An escapement device of a timepiece comprises an escapement mobile element comprising a plurality of blocking teeth, a blocking mobile element, provided to block and unblock said at least one escapement mobile element), receive and transmit an impulse during the same vibration of the oscillator. The blocking device is arranged to cooperate with a first blocking tooth from the plurality of blocking teeth to unblock said at least one escapement mobile element during an intermediate unblocking step, and cooperate with a second blocking tooth from the plurality of blocking teeth, different from said first blocking tooth, during an impulse step.
Claims15
An escapement device of a timepiece, comprising:
- at least one escapement mobile element arranged to be in engagement with a drive gear train (99) of the timepiece and comprising a plurality of blocking teeth,
- at least one blocking mobile element, provided to:
- block said at least one escapement mobile element during a rest step,
- unblock said at least one escapement mobile element during an intermediate unblocking step, at the end of the rest step,
- receive from said at least one escapement mobile element an impulse during an impulse step,
- transmit at least part of the received impulse to an oscillator of the timepiece,
- characterized in that, during a same vibration of the oscillator, the blocking mobile element is arranged to:
- cooperate with a first blocking tooth from the plurality of blocking teeth to unblock said at least one escapement mobile element during the intermediate unblocking step,
- cooperate with a second blocking tooth from the plurality of blocking teeth, different from said first blocking tooth, to receive from said at least one escapement mobile element the impulse during the impulse step subsequent to said intermediate unblocking step.
A method for sustaining the oscillations of an oscillator in a timepiece, the timepiece comprising at least:
- an oscillator arranged to have periodic oscillations,
- a drive gear train arranged to generate a drive force, comprising for example a mainspring such as a barrel spring,
- an escapement device arranged between the oscillator and the drive gear train, comprising at least a first escapement mobile element movable in rotation and comprising a plurality of first blocking teeth, a second escapement mobile element movable in rotation, comprising a plurality of second blocking teeth and engaged with the first escapement mobile element, and a blocking mobile element movable in rotation,
- the method for sustaining the oscillations comprising at least:
- a first step called first-rest step, during which the first escapement mobile element cooperates with the blocking mobile element so as to block the blocking mobile element in a first blocking position,
- a second step called first-impulse step, during which the first escapement mobile element drives the blocking mobile element along a first predefined impulse path,
- a third step called second-rest step, during which the second escapement mobile element cooperates with the blocking mobile element so as to block the blocking mobile element in a second blocking position,
- a fourth step called second-impulse step, during which the second escapement mobile element drives the blocking mobile element along a second predefined impulse path.
Dependencies are inferred from the claim text.