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Escapements for watch movements

A technology for escapement mechanisms and clocks, which is applied to escapement mechanisms, clocks, mechanically driven clocks, etc., and can solve the problems of unoptimized impact pin and fork geometry, not optimal impact function, etc.

Active Publication Date: 2017-07-11
MONTRES BREGUET
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, a geometry that may be optimal for unlocking functionality may not be optimal for impact functionality
In conventional systems, the geometry of the impact pin and fork is therefore not optimized

Method used

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  • Escapements for watch movements
  • Escapements for watch movements
  • Escapements for watch movements

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0062]Referring to the drawings, an escapement for a timepiece movement comprises a wheel 5 with teeth 9 , an escapement lever 7 , and a disc device 4 coupled to a balance wheel 2 .

[0063] The pallet lever comprises a fork 13, pallet stones 17a, 17b, and a lever 15 interconnecting the pallet stones with the fork. The lever is rotatably coupled to the movement frame by means of a pivot 11 . The pallet stones engage teeth 9 of a wheel connected to an energy source that transmits rotational torque to the wheel. One pallet stone forms the entry pallet stone 17a, while the other forms the exit pallet stone 17b. The escape lever also includes a guard pin 27 fixed to the fork by means of a pin, for example driven into a fixing hole 27 at the base of the fork. The mechanism shown corresponds to a Swiss lever type escapement. Since the principle is well known, conventional elements and their operation will not be described in more detail in this specification.

[0064] The disc d...

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PUM

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Abstract

The invention relates to an escapement mechanism for a watch movement. The escapement mechanism (3) for the watch movement includes a pallet lever (7) with a fork (13), and a roller device (4) with an impulse-pin coupled to a balance (2). The fork includes a first horn (19) and a second horn (21). The impulse-pin includes a first cam portion (12) configured to engage an engagement surface (23) of the first horn, and a second cam portion (14) configured to engage an engagement surface (25) of the second horn. Part of engagement in contact with the cam surface portions comprises a non-planar geometric profile.

Description

technical field [0001] The present invention relates to escapements for timepiece movements, in particular Swiss lever or English lever escapements. The invention relates more particularly to the optimization of the assembly formed by the striker pin and the pallet. Background technique [0002] The assembly formed by the striker pin and the pallet fork allows the teeth of the escapement wheel to be unlocked from the lever and balance the impact of the wheel. During impact, the striker pin and pallet, attached to the counterweight, transfer energy from the escape lever to the counterweight with each vibration. [0003] Conventional systems are formed from a circular or "half-moon" shaped needle with a portion of the circle removed to allow the needle to enter the fork in a sufficiently stable manner. The fork is in the form of a rectangular cutout, and the surface in contact with the impact needle is a flat surface. [0004] Depending on the frequency of oscillation of th...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G04B15/14
CPCG04B15/08G04B15/14
Inventor B.朱诺德S.马雷查S.比尤金D.萨奇P.N.卡拉帕蒂斯
Owner MONTRES BREGUET