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Tourbillon without the balance weight

A technology of a rotating mechanism and a balance wheel, applied in the direction of a stable frequency mechanism, a stable frequency mechanism, a mechanically driven clock, etc., can solve the problems of different friction force of the balance wheel and interference with the normal operation of the balance wheel, and achieve a large allowable error, Precise effect of the Toubillon swivel mechanism

Active Publication Date: 2010-11-03
MONTBLANC MONTRE SA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the upper bearing of the balance wheel is located within the cage, and the weight of the balance wheel, depending on the position of the timepiece, is thus subtracted from, or added to, the weight of the cage, which has considerable disadvantages
In addition, the balance wheel pivots in a fixed lower bearing and an upper bearing that rotates with the cage, which can result in different friction forces on each side of the balance wheel, potentially interfering with the normal functioning of the balance wheel

Method used

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Examples

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Embodiment Construction

[0054] figure 1 A cross-sectional view of a tourbillon mechanism 1 of a timepiece according to an embodiment of the invention is shown. More specifically, the Tourbillon mechanism comprises a cage capable of rotating about an axis A and having a lower cage platform and an upper cage platform 10 rigidly connected to each other by cylinders not shown. The cage also includes a hollow core 21 extending coaxially with the axis A below the lower platform 11 . The cage pinion 13 is fastened to the outer periphery of the core 21 .

[0055] The assembly formed by core 21 and cage pinion 13 is mounted in a lower bearing 22 housed in a lower plate 24 and in an upper bearing 23 housed in a fixed wheel 29 . The latter is mounted concentrically to the watch cage, in a second or main plate 25 rigidly connected to the lower plate 24 . Of course, the lower plate 24, the main plate 25 and the fixed wheel 29 are the fixed elements of the timepiece.

[0056] The escapement mobile device is in...

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Abstract

The invention relates to a tourbillon without the balance weight. Tourbillon mechanism for a watch having a turning cage mounted in pivoting manner in a first and second cage bearing lodged in fixed elements of the watch; an escapement mobile integral with the cage; and a regulating element in the form of a spiral balance capable of oscillating around a balance staff according to pulses received from the escapement mobile. The balance staff is mounted in pivoting manner in the balance bearings lodged outside the cage. The outer extremity of the spiral hairspring is fastened to the cage through a hairspring stud.

Description

technical field [0001] The invention relates to a tourbillon for a timepiece in which the positioning of the balance bearings allows the weight of the balance to be subtracted from the weight of the cage at all positions of the timepiece. Background technique [0002] A tourbillon is a device that improves the precision of a timepiece. It consists of a watch cage rotatably mounted on the bezel and a balance wheel oscillatingly mounted in the watch cage. The oscillating movement of the balance is usually maintained by an escapement also mounted on the cage. The cage is driven in rotation by a train wheel, the last mobile of which engages a pinion or wheel integrated into the cage. [0003] Despite the large number of different implementations of these tourbillon mechanisms, the assembly and / or arrangement of several components in conventional tourbillon mechanisms is still suboptimal. For example, the accuracy of a Tourbillon rotary mechanism is affected by the mass of the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G04B17/28
CPCG04B17/285
Inventor F·布罗萨德H·洛佩兹
Owner MONTBLANC MONTRE SA
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