Timepiece escapement device and operating method of such a device
AssigneeDetra SA
InventorXuan Mai Tu
Life of this patent
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Abstract
The invention relates to an escapement device (400) comprising a first escapement wheel (1), a second escapement wheel (2), and a brake-lever (3), said second escapement wheel being disposed between the first escapement wheel and the brake-lever, in particular the second escapement wheel coming into contact and engaging with both the first escapement wheel and the brake-lever.
Claims26
A method of operating an escapement device situated between a wheel of a geartrain and an oscillator, the escapement device comprising a first escapement wheel pivoted about a first axis, a second escapement wheel pivoted about a second axis, and a blocking-lever, the method comprising:
- in a disengagement phase, applying simultaneously to the second escapement wheel:
- a first force by the first escapement wheel, and
- a second force by the blocking-lever,
- wherein the intensity of the second force is less than 0.5 times the intensity of the first force with a lever arm of the first force with respect to the second axis being smaller than a lever arm of the second force with respect to the second axis.
An escapement device comprising:
- a first escapement wheel,
- a second escapement wheel, and
- a blocking-lever,
- wherein the second escapement wheel is situated between the first escapement wheel and the blocking-lever, and
- wherein the second escapement wheel comprises a second pinion, the second pinion being arranged to cooperate with the first escapement wheel, the first escapement wheel having a diameter greater than the diameter of the second pinion of the second escapement wheel.
A mechanical transmission device for a timepiece designed to transmit a torque to an escapement wheel, comprising:
- a pinion having resting surfaces and impulse surfaces, mounted on a same axis as the escapement wheel,
- a wheel or first escapement wheel subjected to a torque from a barrel,
- wherein the resting surfaces and the impulse surfaces are arranged so that the torque transmitted by the wheel or first escapement wheel to the pinion in the impulse phase is greater than 1.5 times the torque transmitted by the wheel to the pinion in the disengagement phase.
Dependencies are inferred from the claim text.