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Case for screening magnetic fields

A shell and magnetic field technology, applied in the direction of magnetic/electric field shielding, mechanically driven clocks, protection against external influences, etc., can solve problems such as easy deformation and dial positioning problems

Inactive Publication Date: 2008-07-30
RICHEMONT INT
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Moreover, dials made of soft iron are more easily deformed due to the characteristics of the material, so the dial positioning required during watch assembly is problematic and creates more after-sales service requirements

Method used

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  • Case for screening magnetic fields
  • Case for screening magnetic fields

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Embodiment Construction

[0022] In the following, the invention will be described in detail with the aid of the mentioned drawings.

[0023] Referring to FIG. 1 , the principle of a timepiece with a movement protected by a shield case according to the invention will first be explained. The housing according to the invention for shielding magnetic fields comprises at least two parts, namely lower parts 4 , 5 and a bell-shaped upper part 3 . The lower parts 4, 5 and the bell-shaped upper part 3 are generally composed of soft iron or other similarly magnetic material and have a shape suitable for these parts to enclose the movement 1 of the timepiece. The lower part preferably consists of two separate parts, namely the bottom part 5 and the ring-shaped middle part 4, which can be joined together, but can also be made as a single part. The annular middle part 4 is fixed directly to the outer periphery of the movement 1 during assembly, and the bottom of the shielding case is usually held by a spring 15 b...

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Abstract

The invention relates to an enclosure for shielding magnetic fields comprising at least two parts, more particularly a lower part (4, 5) and a bell-shaped upper part (3). The shape of these parts is such that it can surround the timepiece movement (1). Moreover, the upper part (3) is connected in such a way that, when connected to the movement, it can move in a plane parallel to the movement (1) and in a direction perpendicular to this plane substantially Do not move.

Description

technical field [0001] According to the preamble of claim 1, the invention relates to a housing for shielding magnetic fields, comprising at least two parts: an upper part and a lower part, adapted to enclose the movement of a timepiece and to shield it from the Influenced by an external magnetic field; also relates to a timepiece having such a case. Background technique [0002] It is particularly common in pilot's watches and other so-called antimagnetic watches with a desired accuracy or range of application that it is mandatory to shield or suppress externally acting magnetic fields in order to sufficiently protect the movement against the influence of such fields. [0003] By designing movements whose function is not affected by possible magnetic fields, it is in principle possible, for example, to replace parts made of steel with parts made of non-magnetically permeable material. [0004] Usually, however, it is sufficient to limit the magnetic fields that may act fro...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G04G17/02G04C3/00G04B43/00H05K9/00
CPCG04B43/00G04G17/08
Inventor D·齐默尔曼P·施魏策尔
Owner RICHEMONT INT
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