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Method for joining timepiece parts

A component and watch technology, applied in the field of integrated components, can solve the problems that the pallet cannot be combined, shellac escapes, surface tension is incompatible with shellac wetting, etc., to improve the combination, reduce dirt, The effect of reducing the impact

Pending Publication Date: 2022-04-12
ETA SA MFG HORLOGERE SUISSE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, these high resistance oil repellent spreaders cause surface tension incompatibility with the wetting of surfaces by shellac
In this case the pallet stones cannot be bonded, as the shellac will tend to escape from the surface coated with the oil repellant

Method used

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  • Method for joining timepiece parts
  • Method for joining timepiece parts

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Embodiment Construction

[0041] figure 1 with 2An embodiment of the bonding method according to the invention is shown schematically. As mentioned above, the method according to the invention can be used to join pallet stones 12 , 14 to pallet lever 16 of escapement mechanism 10 of a mechanical watch. The figures show a Swiss lever escapement 10 . It includes the escape wheel 18, usually made of hardened and polished steel. Pallet lever 16 connects the escape wheel to the balance wheel (small disc 20, large disc 22 and balance shaft 24 are shown) and can be applied between two positions in a balance-hairspring assembly. rate switching. Every half cycle, the escape wheel 18 provides an impact to the pallet lever 16, which transmits this impact to the balance wheel to maintain the oscillation of the balance wheel. The pallet stones 12, 14 are usually made of ruby ​​due to its hardness and low coefficient of friction, and are bonded to the pallet rod 16 by means of a shellac-based adhesive.

[0042...

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PUM

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Abstract

The present invention relates to a method for bonding timepiece components, comprising applying an adhesive to first and / or second timepiece components to be bonded to each other, and depositing an adhesive layer on at least one of the first and second components to be bonded by spraying a primer composition in a localized bonding area, the primer composition is then cured. If an adhesive is applied to the same one or more components as the adhesion layer, the adhesion layer is deposited prior to application of the adhesive.

Description

technical field [0001] The present invention relates to the field of timepieces, and more particularly to a method for joining timepiece parts to form a one-piece assembly of timepiece parts. Background technique [0002] In the field of horology, some horological components can be assembled to each other by means of an adhesive, which is a liquid adhesive when applied. [0003] For example, in the lever escapement of a mechanical watch, the pallet stone (usually made of ruby) is attached to the pallet rod by bonding, usually using shellac. Shellac is a natural hot-melt resin, i.e., it melts above its melting point (T m ) is similar to honey at a temperature below its melting point (T m ) or below its glass transition temperature (T g ) in a solid state. Depending on the manufacturing process of the pallet lever, the result of the bonding step may not meet the requirements, either because the mechanical strength of the pallet stone is insufficient, or because the aesthe...

Claims

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Application Information

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IPC IPC(8): G04D3/00G04B15/14G04B17/06G04B19/10G04B19/12
CPCG04B15/14G04B17/06G04B19/103G04D3/003G04D3/0035G04D3/0017G04D3/0048G04D3/0051G04B19/12G04B13/02
Inventor S·霍特-马钱德M·韦拉尔多
Owner ETA SA MFG HORLOGERE SUISSE
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