Temperature control for a timepiece

Patent metadata

Field	Value
Publication number	US-12306590-B2
Application number	US-202217962866-A
Country	US
Kind code	B2
Filing date	Oct 10, 2022
Priority date	Dec 22, 2021
Publication date	May 20, 2025
Grant date	May 20, 2025

Abstract

A temperature control device for a timepiece, includes a first light-transmitting portion, defining with a second adjacent portion an intermediate chamber of variable dimensions according to the temperature of the first portion, the first portion includes first microlouvers according to a first spatial distribution, the second portion includes second microlouvers according to a second spatial distribution and substantially facing the first microlouvers, to superimpose partially or totally in certain relative positions between the first portion and the second portion, in order to vary the transmission and/or the reflection of the incident light on the first portion between a maximum and a minimum.

First claim

The invention claimed is:

1. A temperature control device for a timepiece, comprising:
a first light-transmitting portion, and a second portion defining with said first portion an intermediate chamber of variable dimensions in an axial direction and/or a radial direction depending on the temperature of said first portion, wherein said first portion includes a plurality of first microlouvers according to a first spatial distribution, and said second portion includes a plurality of second microlouvers according to a second spatial distribution, said first and second portions provided with these first and second microlouvers being configured to move in relation to one another, thus varying the transmission and/or the reflection of said light on said first portion between a maximum and a minimum.

2. The temperature control device, according to claim 1 , wherein the first microlouvers and the second microlouvers are arranged to superimpose partially or totally in certain relative positions of said first portion in relation to said second portion, in order to vary the transmission and/or the reflection of the incident light on said first portion between a maximum and a minimum.

3. The temperature control device according to claim 1 , wherein said first portion is configured to move in an axial direction and/or a radial direction relative to said second portion depending on the temperature of said first portion.

4. The temperature control device according to claim 1 , wherein said first portion has a first thermal expansion coefficient, which is different from a second thermal expansion coefficient of said second portion.

5. The temperature control device according to claim 1 , wherein said first portion or said second portion is mounted on a third portion, which has a third thermal expansion coefficient that is different from a first thermal expansion coefficient of said first portion and/or from a second thermal expansion coefficient of said second portion.

6. The temperature control device according to claim 1 , wherein said first spatial distribution and said second spatial distribution are homothetic or identical.

7. The temperature control device according to a claim 1 , wherein said first microlouvers are located on a lower surface of said first portion, at said intermediate chamber.

8. The temperature control device according to claim 1 , wherein said second microlouvers are located on an upper surface of said second portion, at said intermediate chamber.

9. The temperature control device according to claim 1 , wherein said first microlouvers and/or said second microlouvers include a reflective coating.

10. The temperature control device according to claim 1 , wherein said first spatial distribution and second spatial distribution, and the dimensions of said first portion and of said second portion are adjusted for a maximum reflection at higher temperatures, and for a maximum transmission at lower temperatures.

11. The temperature control device according to claim 1 , wherein said first portion includes at least one first coated and/or structured reflective portion, arranged to send back oblique light rays in relation to an axial direction of said timepiece and to allow light rays to pass through in this said axial direction.

12. The temperature control device according to claim 1 , wherein said first portion includes at least one first coated and/or structured reflective portion, arranged to send back oblique light rays in relation to an axial direction of said timepiece and to allow light rays to pass through in said axial direction, the at least one said first reflective portion includes prismatic structures protruding on said first portion, disposed according to said first spatial distribution, and each including a reflective coating.

13. The temperature control device according to claim 1 , wherein said first portion includes at least one first coated and/or structured reflective portion, arranged to send back oblique light rays in relation to an axial direction of said timepiece and to allow light rays to pass through in said axial direction, the at least one said first reflective portion includes reflective structures embedded within said first portion for a better abrasion resistance, disposed according to said first spatial distribution, and each including a reflective coating.

14. The temperature control device according to claim 1 , wherein said first portion is a protective cover and wherein said second portion is a watch crystal.

15. A timepiece comprising at least one of the temperature control device according to claim 1 .

16. The timepiece according to claim 15 , wherein the timepiece is a watch.

Assignees

• Omega Sa

Inventors

• Gimkiewicz Christiane

Classifications

• G05D23/19

  characterised by the use of electric means {(G05D23/1393 takes precedence)} · CPC title

• G02B5/045

  Prism arrays · CPC title

• G04G17/08

  Housings · CPC title

• G04B43/005 Primary

  Protection against temperature influences · CPC title

• G04B39/00

  Watch crystals; Fastening or sealing of crystals; Clock glasses · CPC title